CN218458211U

CN218458211U - Transapical mitral valve replacement transporter

Info

Publication number: CN218458211U
Application number: CN202221230478.XU
Authority: CN
Inventors: 吴明明; 吴意; 王亮; 陈大凯
Original assignee: Koka Nantong Lifesciences Co Ltd
Current assignee: Koka Nantong Lifesciences Co Ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2023-02-10
Anticipated expiration: 2032-05-20

Abstract

The utility model discloses a through apex mitral valve replacement conveyer has: an outer tube, a valve accommodating tube and a sheath tube sleeve which are connected in sequence from the near end to the far end; the handle shell and the withdrawing knob are arranged in an open cavity at the far section of the handle shell, the inner surface of the withdrawing knob is provided with knob internal threads, and the knob internal threads are connected with the external threads of the outer tube; the open cavity of the handle shell is a square frame penetrating through the handle shell, and a circle of groove for clamping is arranged on the far-end frame wall and/or the near-end frame wall of the square frame; the side surface of the far end and/or the side surface of the near end of the retraction knob are/is provided with a circle of bulges for clamping, and the bulges of the retraction knob are embedded in the groove of the handle shell. The utility model discloses a set up the recess in the square frame of handle shell, match the setting with the arch of the both ends face of withdrawal knob, and carry out spacing improvement to the withdrawal knob and withdraw the stability of in-process system.

Description

Transapical mitral valve replacement transporter

Technical Field

The utility model belongs to the technical field of medical instrument, concretely relates to through apex of heart mitral valve replacement conveyer.

Background

Valvular heart disease, particularly the mitral valve, occurs in approximately 1000 million people each year in china because the mitral valve annulus is not a standard circle, but resembles a D-shape. Therefore, in order to satisfy the requirement of simultaneously adapting to the mitral annulus and not affecting the sealing performance of the artificial valve leaflets, a double-layer stent is currently researched, and in order to avoid the limitation of the transfemoral mode on the pressing and holding diameter and the defect of the traditional chest-opening mode on the human body, the mitral valve replacement is more performed through the transapical mode at present.

The CN107750150A patent application provides a device and method for delivering, repositioning and retrieving transcatheter prosthetic valves, but the delivery knob of the device risks idle delivery of the inner tube and system instability resulting in delivery failure.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to carry the knob to have the inner tube to carry to take place idle running and system unstability and cause the technical problem who carries the failure among the prior art, aim at provides a new through apex mitral valve replacement conveyer.

The utility model discloses a through apex mitral valve replacement conveyer has:

a valve constricting pipe, the interior of which can be compressed to place a prosthetic valve;

the inner surface of the middle pipe is provided with a middle pipe internal thread;

the inner tube penetrates through the inner part of the middle tube at the near section, the far end of the inner tube is abutted against the near end of the valve contraction tube, the outer surface of the near end of the inner tube is provided with inner tube external threads, the inner tube external threads are connected to the middle tube internal threads in a matched mode, and the rotation of the middle tube can drive the inner tube to push the valve contraction tube towards the far end;

and the wall of the forward push knob is connected to the near-end pipe wall of the middle pipe in a clamping manner, and the forward push knob is rotated in the circumferential direction to drive the middle pipe to rotate.

The utility model discloses a preceding knob that pushes away with well pipe buckle is connected for preceding knob that pushes away can stabilize rotatory well pipe and make well pipe can stably move inner tube propelling movement valve and receive beam tube and carry towards the distal end.

Preferably, the transapical mitral valve replacement transporter further comprises:

the handle shell is sleeved outside the middle pipe, and the forward push knob is rotatably arranged at the near end of the handle shell;

a transition piece located at the distal end of the handle shell, the distal section of the inner tube non-rotatably disposed through the transition piece.

The utility model discloses a transition connection prevents that the inner tube from taking place to rotate and can carry prosthetic valve towards distal end straight line in transportation process.

Preferably, the first and second liquid crystal display panels are,

the inner wall of the far end of the forward push knob is provided with a plurality of annular convex rings;

the outer wall of the near end of the handle shell is provided with a plurality of corresponding annular concave rings, and the annular convex ring of the forward push knob is embedded in the annular concave ring of the handle shell, so that the forward push knob is rotatably arranged at the near end of the handle shell.

Preferably, the first and second liquid crystal display panels are,

the inner wall of the far end of the forward push knob is provided with a plurality of annular concave rings;

the outer wall of the near end of the handle shell is provided with a plurality of corresponding annular convex rings, and the annular convex rings of the handle shell are embedded in the annular concave rings of the forward push knob, so that the forward push knob is rotatably arranged at the near end of the handle shell.

Preferably, the first and second liquid crystal display panels are,

the forward-push knob is provided with a forward-push gasket which is clamped between the inner wall of the near end of the handle shell and the outer wall of the near end of the middle pipe so as to reduce friction between the handle shell and the middle pipe during rotation.

Preferably, the first and second air flow paths are arranged in parallel,

the inner wall of the proximal end of the forward push knob is provided with at least one axial groove;

the outer wall of the near end of the middle pipe is provided with at least one axial clamping plate; the axial clamping plate of the middle pipe is embedded in the axial groove of the forward push knob, so that the forward push knob rotates circumferentially to drive the middle pipe to rotate.

Preferably, the first and second liquid crystal display panels are,

the inner wall of the near end of the forward push knob is provided with at least one axial clamping plate;

the near-end pipe wall of the middle pipe is provided with at least one axial groove; the axial clamping plate of the forward push knob is embedded in the axial groove of the middle pipe, so that the forward push knob rotates circumferentially to drive the middle pipe to rotate.

Preferably, the first and second liquid crystal display panels are,

the outer rings of the radial sections of the middle section and the far section of the inner pipe are non-circular;

the inner ring of the radial section of the transition connecting piece is a non-circular shape matched with the shape and size of the outer ring of the radial section of the middle section and the far section of the inner pipe, and the middle section far section of the inner pipe is arranged in the transition connecting piece in a penetrating mode and cannot rotate.

Preferably, the first and second liquid crystal display panels are,

the outer ring of the radial section of the middle section and the far section of the inner tube is D-shaped, square-shaped,

A shape, square or polygon;

the inner ring of the radial section of the transition connecting piece is D-shaped, square-shaped,

A shape, square, or polygon.

Preferably, the proximal section inner wall of the handle case has:

the plurality of proximal section axial reinforcing ribs are axially and fixedly arranged on the proximal section inner wall of the handle shell;

the proximal radial reinforcing ribs are radially and fixedly arranged on the proximal inner wall of the handle shell;

the near-segment axial reinforcing ribs and the near-segment radial reinforcing ribs can be attached to the outer wall of the middle pipe, so that the stability of the middle pipe during rotation is improved.

the valve containing tube is internally preset with the valve contraction tube, the distal end of the transition connecting piece is connected with the proximal end of the valve containing tube, the distal section of the inner tube is arranged in the proximal end of the valve containing tube in a penetrating manner, a cavity sealing gasket is arranged at the joint of the distal end of the transition connecting piece and the proximal end of the valve containing tube, and the cavity sealing gasket is sleeved on the periphery of the distal section of the inner tube;

a sheath sleeve having a sheath sealing gasket in a proximal end thereof, the proximal end of the sheath sleeve being sealingly connected to the distal end of the valve receiving tube, the middle tube being rotatable to drive the inner tube to push the valve restraining tube to deliver the prosthetic valve distally along a central axis of the sheath sleeve.

Preferably, the sheath sleeve has:

a sheath base at the proximal end of the sheath sleeve, the sheath base of the sheath sleeve being attached to the distal end of the valve containment tube;

the proximal end of the inner sheath is connected with the distal end of the sheath base;

and the outer sheath pipe is sleeved outside the inner sheath pipe, and the near end of the outer sheath pipe is connected with the far end of the sheath pipe base.

the outer pipe is arranged between the distal section of the handle shell and the distal end of the middle pipe, the outer surface of the outer pipe is provided with outer pipe external threads, and the proximal end of the transition connecting piece is fixedly connected to the distal end of the outer pipe;

and the withdrawing knob is clamped in the opening cavity of the distal section of the handle shell, the inner surface of the withdrawing knob is provided with knob inner threads, the knob inner threads are matched and connected with the outer pipe outer threads, and the withdrawing knob is rotated to drive the outer pipe, the valve containing pipe connected with the outer pipe and the sheath pipe sleeve to withdraw towards the near end so as to release the artificial valve.

the middle core pipe penetrates through the inner pipe, and the near end of the middle core pipe penetrates out of the near end of the forward push knob;

the inner surface of the near end of the inner tube is provided with a circle of near end fixing ring, and the near end of the middle core tube is attached to and penetrates through the near end fixing ring of the inner tube to provide supporting force for the middle core tube;

the utility model discloses a heart valve prosthesis, including well core pipe, the outer wall cover of well core pipe is equipped with the solid fixed ring of distal end, the outer wall circumference of the solid fixed ring of distal end is equipped with a rubber circle, the inner wall of inner tube compresses tightly the rubber circle of well core pipe distal end, with incite somebody to action prosthetic valve seals with the external world and keeps apart.

the far end of the locking head is movably connected with the near end of the forward pushing knob, the middle section of the locking head is provided with the locking knob with a sealing ring, the near end of the locking head is provided with a screw cap, and the near end of the core tube is fixed in the far end of the locking head;

and the tether is arranged in the central core tube in a penetrating way, the far end of the tether is connected with the artificial valve, and the near end of the tether penetrates out of the near end of the locking head and can be locked by the locking knob and/or the nut.

Preferably, the first and second liquid crystal display panels are,

the outer wall of the near end of the valve constricting pipe is provided with an outer step opening;

the far-end inner wall of the inner tube is provided with an inner step opening, and the outer step opening of the valve bundling tube is matched and buckled on the inner step opening of the inner tube to form abutting joint.

Preferably, the transapical mitral valve replacement transporter has:

the two ends of the proximal connecting piece are respectively detachably connected with the transition connecting piece and the valve accommodating tube, and the transition connecting piece and the valve accommodating tube are connected together through the proximal connecting piece;

and the two ends of the distal connecting piece are detachably connected with the valve accommodating pipe and the sheath sleeve respectively, and the valve accommodating pipe and the sheath sleeve are connected together through the distal connecting piece.

Preferably, the first and second liquid crystal display panels are,

the valve constricting tube is internally provided with a trumpet-shaped structure, and the opening of the trumpet-shaped structure faces to the far end. When the artificial valve is pre-folded, the proximal end of the artificial valve is folded at the bell mouth structure, and other parts are positioned in a larger space in the valve accommodating tube.

The utility model discloses another purpose is to the in-process of withdrawing the sleeve pipe cover among the prior art, because of the withdrawal knob does not match with the chamber shape of opening of handle shell, can rock the unstability during rotation, leads to wearing to establish the outer tube in the withdrawal knob and holds the pipe and take place the technical problem of rocking with the valve of outer tube connection, and aim at provides one kind can stabilize the new technical scheme of components such as withdrawal sheath pipe cover. The transapical mitral valve replacement conveyor in the technical scheme can stably withdraw components such as the sheath and the sleeve after the artificial valve is conveyed to a target position.

The transcardial mitral valve replacement conveyor of the utility model is provided with:

the valve comprises an outer pipe, a valve accommodating pipe and a sheath pipe sleeve, wherein the outer pipe is provided with outer pipe external threads on the outer surface, and the valve accommodating pipe and the sheath pipe sleeve are sequentially connected from the near end to the far end;

a handle shell, wherein the far section of the handle shell is sleeved outside the outer pipe;

a retraction knob disposed in the open cavity of the distal section of the handle shell, the retraction knob having an inner knob thread on an inner surface thereof, the inner knob thread being connected to the outer tube thread, the retraction knob being rotated to cause the outer tube, the valve accommodating tube and the sheath tube connected to the outer tube to retract proximally to release the prosthetic valve;

wherein the content of the first and second substances,

the open cavity of the handle shell is a square frame penetrating through the handle shell, and a circle of groove for clamping is arranged on the far-end frame wall and/or the near-end frame wall of the square frame;

the withdrawing knob is provided with a circle of protrusions for clamping on the side surface of the far end and/or the side surface of the near end, and the protrusions of the withdrawing knob are embedded in the groove of the handle shell, so that the withdrawing knob is limited.

The utility model discloses a set up the recess that the screens was used in the square frame of handle shell, the both ends face of withdrawing the knob sets up the arch that corresponds, inlays through the arch of withdrawing the knob and establishes in the recess of handle shell, and carry out the stability of spacing improvement withdrawal in-process withdrawal knob and wear to establish the valve that outer tube and outer tube in the withdrawal knob are connected together and hold the pipe and sheath pipe sleeve and withdraw the stability of in-process to the withdrawal knob.

Preferably, the circle of protrusions for clamping is a plurality of protrusions which are uniformly distributed into a circle, and the protrusions are uniformly embedded in the grooves of the handle shell.

Preferably, the circle of protrusions for locking is a circle of convex ring, and the convex ring is embedded in the groove of the handle shell.

Preferably, the retraction knob has:

and the two withdrawing washers are arranged on the proximal end surface and the distal end surface of the withdrawing knob, are sleeved outside the outer pipe and are clamped in the bulges, and are used for reducing friction during rotation and improving the stability during rotation.

The width of the protrusion is smaller than that of the retraction washer, and the retraction knob is rotatably connected with the handle shell through the retraction washer.

Preferably, the retraction knob has:

the knob internal thread is arranged on the inner surface of the inner knob ring;

the outer button ring is sleeved outside the inner button ring;

the support ring is positioned between the inner button ring and the outer button ring and is used for fixedly connecting the inner button ring and the outer button ring, so that the outer diameter of the outer button ring can be enlarged under the condition of not increasing materials and weight, and the outer button ring is convenient to rotate.

Preferably, the first and second liquid crystal display panels are,

the outer wall of the near end of the outer pipe is provided with a plurality of guide plates which are axially arranged;

the inner wall of the handle shell is provided with a plurality of positioning plates which are axially arranged, and the guide plates can be clamped on the positioning plates, so that the outer tube can be retracted in a non-rotatable mode.

the valve constricting pipe can be used for placing the artificial valve in a compressible mode and can be pre-arranged in the valve accommodating pipe;

the middle pipe penetrates through the handle shell, and the inner surface of the middle pipe is provided with middle pipe internal threads;

the proximal section of the inner tube penetrates through the inner part of the middle tube, the distal section of the inner tube penetrates through the proximal end of the valve accommodating tube, the distal end of the inner tube is connected with the valve contraction tube, the outer surface of the proximal end of the inner tube is provided with inner tube external threads, the inner tube external threads are connected to the middle tube internal threads in a matched mode, and the middle tube can drive the inner tube to convey the artificial valve towards the distal end by rotating;

the proximal end of the transition connecting piece is fixedly connected to the distal end of the outer tube, the distal end of the transition connecting piece is connected with the proximal end of the valve accommodating tube, a cavity sealing washer is arranged at the joint of the distal end of the transition connecting piece and the proximal end of the valve accommodating tube, the cavity sealing washer is sleeved on the periphery of the distal section of the inner tube, the outer tube and the valve accommodating tube are connected together through the transition connecting piece, and the distal section of the inner tube is arranged in the transition connecting piece in a non-rotatable penetrating mode;

the front push knob is arranged at the near end of the handle shell, the button wall of the front push knob is connected to the near-end pipe wall of the middle pipe in a buckling mode, and the middle pipe is driven to rotate by rotating the front push knob in the circumferential direction.

the central core pipe penetrates through the inner pipe, and the near end of the central core pipe penetrates out of the near end of the forward push knob;

a tether is arranged in the central core tube in a penetrating way, the far end of the tether is connected with the artificial valve, and the near end of the tether penetrates out of the near end of the locking head and can be locked by the locking knob and/or the nut.

Preferably, the transapical mitral valve replacement transporter comprises:

and the two ends of the distal connecting piece are detachably connected with the valve accommodating tube and the sheath sleeve respectively, and the valve accommodating tube and the sheath sleeve are connected together through the distal connecting piece.

Preferably, the first and second liquid crystal display panels are,

a pipe hole penetrates through the wall of the outer pipe;

a shell hole penetrates through the far section of the handle shell, and the shell hole corresponds to the pipe hole in position;

scales are arranged on the outer wall of the inner tube, and the scales on the inner tube can be checked through the shell hole and the tube hole so as to judge the conveying position.

Preferably, the outer surface of the valve containing tube has an outer tube stiffener with an indicator.

Preferably, the sheath sleeve has:

the sheath tube base is positioned at the proximal end of the sheath tube sleeve and is provided with a sheath sealing gasket, and the distal end of the valve accommodating tube is hermetically connected in the sheath tube sleeve by the sheath sealing gasket;

the proximal end of the inner sheath tube is connected with the distal end of the sheath tube base;

The utility model discloses hold being connected of managing unstablely with the valve to outer tube among the prior art, withdraw the technical problem that the in-process valve holds the pipe and drops from the outer tube easily, aim at provides a technical scheme who stably connects outer tube and valve and holds the pipe. The present invention provides a transapical mitral valve replacement conveyor comprising:

an outer tube, the outer surface has outer tube external screw thread;

a handle shell, wherein the distal section of the handle shell is sleeved outside the outer pipe;

a retraction knob disposed within the open cavity of the distal section of the handle shell, the retraction knob having internal knob threads on an inner surface thereof, the internal knob threads being connected to the external outer tube threads;

the near end of the transition connecting piece is fixedly connected with the far end of the outer tube;

a valve accommodating tube, the proximal end of which is connected to the distal end of the transition piece;

a sheath sleeve attached to the distal end of the valve-receiving tube;

rotating the retraction knob to retract the outer tube, the valve accommodating tube and the sheath tube connected together with the outer tube, proximally to release the prosthetic valve;

wherein the content of the first and second substances,

the far end of the outer pipe is a round pipe, and the outer wall of the round pipe is provided with a cutting hole for cutting a pair of walls;

the near end of the transition connecting piece is a flange pipe, the flange pipe penetrates through the outer pipe, a pair of through holes penetrating through the wall are formed in the positions, corresponding to the flange pipe, of the flange pipe, and a pair of fixing rods penetrate through the through holes of the transition connecting piece and the cut holes of the outer pipe respectively, so that the transition connecting piece is fixedly connected to the far end of the outer pipe.

The utility model discloses a set up a pair of earnestly hole on the outer tube, set up simultaneously and hold the near-end transition piece that can dismantle the connection of pipe with the valve to set up corresponding perforation on transition piece, then wear to establish the fixed stick transition piece's perforation with in the earnestly hole of outer tube, thereby by transition piece holds firm the linking together of pipe, can also conveniently dismantle when dismantling with the outer tube with the valve with the firm connection of outer tube.

Preferably, the first and second air flow paths are arranged in parallel,

the inner wall of the flange pipe and the outer wall of the circular pipe are bonded by adhesive to further stably and fixedly connect the transition connecting piece at the far end of the outer pipe and seal the interior of the transition connecting piece.

Preferably, the first and second air flow paths are arranged in parallel,

the outer surface of the distal end of the transition piece is provided with an axial lug;

the inner surface of the proximal end of the valve accommodating tube is provided with an axial groove, the proximal end of the valve accommodating tube is sleeved outside the distal end of the transition connecting piece, and the axial convex block of the transition connecting piece is embedded in the axial groove of the valve accommodating tube to form clamping connection so as to prevent relative rotation.

Preferably, the first and second liquid crystal display panels are,

the outer surface of the distal end of the transition piece is provided with an axial groove;

the inner surface of the proximal end of the valve accommodating tube is provided with an axial convex block, the proximal end of the valve accommodating tube is sleeved outside the distal end of the transition connecting piece, and the axial convex block of the valve accommodating tube is embedded in the axial groove of the transition connecting piece to form clamping connection so as to prevent relative rotation.

Preferably, the first and second liquid crystal display panels are,

the outer surface of the distal end of the valve accommodating tube is provided with an axial lug;

the inner surface of the proximal end of the sheath pipe sleeve is provided with an axial groove, the proximal end of the sheath pipe sleeve is sleeved outside the distal end of the valve accommodating tube, and the axial convex block of the valve accommodating tube is embedded in the axial groove of the sheath pipe sleeve to form clamping connection so as to prevent relative rotation.

Preferably, the first and second liquid crystal display panels are,

the outer surface of the distal end of the valve accommodating tube is provided with an axial groove;

the inner surface of the near end of the sheath pipe sleeve is provided with an axial convex block, the near end of the sheath pipe sleeve is sleeved outside the far end of the valve accommodating pipe, and the axial convex block of the sheath pipe sleeve is embedded in the axial groove of the valve accommodating pipe to form clamping connection so as to prevent relative rotation.

and two ends of the proximal end connecting piece are respectively detachably connected with the transition connecting piece and the valve containing pipe, and the transition connecting piece and the valve containing pipe are connected together through the proximal end connecting piece.

Preferably, the first and second air flow paths are arranged in parallel,

the outer surface of the middle section of the transition connecting piece is provided with a transition external thread;

the inner surface of the near end connecting piece is provided with a near end piece internal thread, and the near end piece internal thread is matched and connected with the transition external thread of the transition connecting piece, so that the near end connecting piece is sleeved outside the transition connecting piece;

the outer surface of the proximal end of the valve accommodating tube is provided with a ring of tube bulges;

the inner surface of the far end of the near end connecting piece is provided with a circle of hooking protrusions, the tube protrusion of the valve accommodating tube is hooked on the hooking protrusions of the near end connecting piece, and therefore the near end connecting piece is sleeved outside the near end of the valve accommodating tube.

Preferably, the first and second liquid crystal display panels are,

the outer surface of the middle section of the transition connecting piece is provided with a circle of pipe bulges;

the inner surface of the near end connector is provided with a circle of hooking protrusions, and the hooking protrusions at the near end of the near end connector are hooked through the pipe protrusions of the transition connector, so that the near end connector is sleeved outside the transition connector;

the valve accommodating tube has an outer proximal outer surface with an outer tube thread;

the inner surface of the far end of the near end connector is provided with a near end part inner thread, and the outer thread of the valve containing pipe is matched and connected with the inner thread of the near end part of the near end connector, so that the near end connector is sleeved outside the near end of the valve containing pipe.

Preferably, the first and second liquid crystal display panels are,

the outer surface of the middle section of the valve accommodating tube is provided with outer threads;

the inner surface of the proximal end of the distal connecting piece is provided with a distal piece inner thread, and the outer thread of the valve accommodating tube is matched and connected with the distal piece inner thread of the distal connecting piece, so that the distal connecting piece is sleeved outside the valve accommodating tube;

the inner surface of the far end connecting piece is provided with a circle of hooking protrusions;

the outer surface of the near end of the sheath pipe sleeve is provided with a circle of pipe protrusions, and the pipe protrusions of the sheath pipe sleeve are hooked on the hooking protrusions of the far-end connecting piece, so that the far-end connecting piece is sleeved outside the near end of the sheath pipe sleeve.

Preferably, the first and second liquid crystal display panels are,

the outer surface of the middle section of the valve accommodating tube is provided with a circle of tube bulges;

the inner surface of the near end of the far-end connecting piece is provided with a circle of hooking protrusions, and the hooking protrusions at the near end of the far-end connecting piece are hooked by the tube protrusion of the valve accommodating tube, so that the far-end connecting piece is sleeved outside the valve accommodating tube;

the outer surface of the near end of the sheath sleeve is provided with outer threads;

the inner surface of the far end connector is provided with a far end part inner thread, and the outer thread of the sheath pipe sleeve is matched and connected with the inner thread of the far end part of the far end connector, so that the far end connector is sleeved outside the near end of the sheath pipe sleeve.

Preferably, the sheath sleeve has:

a sheath base located at a proximal end of the sheath housing, the sheath base of the sheath housing being attached to a distal end of the valve containment tube;

Preferably, the handle case has a distal-section inner wall having:

the plurality of far-section axial reinforcing ribs are axially and fixedly arranged on the far-section inner wall of the handle shell;

the plurality of far-section radial reinforcing ribs are fixedly arranged on the inner wall of the far section of the handle shell in the radial direction;

the distal axial stiffener and the distal radial stiffener can be attached to the outer walls of the transition piece and the proximal connector so that the transition piece and the proximal connector are horizontally retracted without rotation.

the valve constricting pipe can be internally compressed and used for placing the artificial valve, and can be pre-arranged in the valve accommodating pipe;

the inner tube is arranged in the middle tube in a penetrating mode, the near section penetrates through the transition connecting piece in a non-rotatable mode and penetrates through the near end of the valve containing tube, a cavity sealing washer is arranged at the joint of the far end of the transition connecting piece and the near end of the valve containing tube, the cavity sealing washer is sleeved on the periphery of the far section of the inner tube, the far end of the inner tube is connected with the valve restraining tube, the outer surface of the near end of the inner tube is provided with inner tube external threads, the inner tube external threads are connected to the middle tube internal threads in a matched mode, and the middle tube can be driven to convey the artificial valve towards the far end through rotation of the middle tube;

the far end of the locking head is movably connected with the near end of the forward push knob, the middle section of the locking head is provided with a locking knob with a sealing ring, the near end of the locking head is provided with a screw cap, and the near end of the core tube is fixed in the far end of the locking head;

Preferably, the outer wall of the outer sheath tube is provided with scales, a retraction end point can be determined according to the scales, the distal end of the outer sheath tube is provided with a developing ring, and a retraction position is determined according to the developing ring and the scales; the inner wall smoothness and hardness of the inner sheath tube are greater than those of the outer sheath tube.

Preferably, the first and second liquid crystal display panels are,

the sheath tube base of the sheath tube sleeve is internally provided with a sheath sealing gasket, and the distal end of the valve accommodating tube is hermetically connected with the proximal end of the sheath tube sleeve through the sheath sealing gasket.

Compared with the prior art, the beneficial effects of the utility model are that:

1) The utility model discloses a push forward the knob with well tubular buckle connects for the rotatory well pipe can be stabilized to the knob that pushes forward, thereby well pipe can stably remove inner tube propelling movement valve and receive the beam tube and carry towards the distal end.

2) The utility model discloses an inner tube middle section and distal segment appearance and the non-circular and shape matching design of transition piece internal surface prevent by transition piece that the inner tube from taking place to rotate and can carry artificial valve towards distal end straight line in transportation process.

3) The utility model discloses a set up the recess that the screens was used in the square frame of handle shell, the both ends face of withdrawing the knob sets up the arch that corresponds, inlays through the arch of withdrawing the knob and establishes in the recess of handle shell, and carry out the stability of spacing improvement withdrawal in-process withdrawal knob and wear to establish the valve that outer tube and outer tube in the withdrawal knob are connected together and hold the pipe and sheath pipe sleeve and withdraw the stability of in-process to the withdrawal knob.

4) The utility model discloses a set up a pair of earnestly hole on the outer tube to set up the perforation that corresponds on transition piece, then wear to establish the fixed rod the perforation of transition piece with in the earnestly hole of outer tube, thereby by the firm connection of transition piece and outer tube holds firm the linking together of pipe with outer tube and valve, can also conveniently dismantle when dismantling. And further bonding the inner wall of the flange pipe and the outer wall of the circular pipe by using an adhesive to stably and fixedly connect the transition connecting piece at the far end of the outer pipe and seal the interior of the transition connecting piece.

5) The utility model discloses a near-end junction that holds the pipe at transition connection's distal end and valve has a chamber seal ring, holds to set up the sheath seal ring between the sheath pipe base of pipe and sheath pipe box at the valve, sets up the rubber circle on the solid fixed ring of distal end to and the overhead locking knob of taking the sealing washer that is provided with of locking, thereby seal up all possible potential passageways and external world and keep apart, further improved conveyer system's leakproofness.

Drawings

Fig. 1A is a schematic side view of a transapical mitral valve replacement conveyor of the present invention;

fig. 1B is a schematic perspective exploded view of the transapical mitral valve replacement conveyor of the present invention;

fig. 1C is a schematic cross-sectional structural view of the transapical mitral valve replacement conveyor of the present invention;

fig. 1D is a schematic side view of the transapical mitral valve replacement conveyor of the present invention with the handle shell 10 removed;

fig. 1E is a schematic perspective view of the internal components of the distal section of the transapical mitral valve replacement conveyor of the present invention;

fig. 2A is a schematic view of an internal structure of a half of the handle case 10 of the present invention;

fig. 2B is a schematic view of the disassembled inner structure of the handle case 10 with the inner tube 30 according to the present invention;

fig. 3 is a schematic structural diagram of the middle tube 20 according to the present invention;

fig. 4A-4B are schematic views illustrating the connection relationship between the inner tube 30 and the transition piece 75 according to the present invention;

FIGS. 4C to 4D are schematic views showing the connection relationship between the inner tube 30 and the valve constricting tube 35 according to the present invention;

fig. 5A-5B are schematic structural views of the push knob 40 according to the present invention;

fig. 6 is a schematic structural view of the core tube 51 and the locking head 53 of the present invention;

fig. 7 is a schematic structural view of the outer tube 70 and the retraction knob 60 of the present invention;

fig. 8 is a schematic structural view of the retraction knob 60 of the present invention;

FIGS. 9A-9D are views showing the connection relationship between the transition piece 70, the valve accommodating tube 85 and the valve constricting tube 35;

fig. 10A is a side view of the sheath 90;

FIG. 10B is a schematic cross-sectional view of the sheath 90;

FIG. 11A is a perspective view of proximal connector 82;

fig. 11B is a perspective view of the distal connector 88.

Detailed Description

The following embodiments of the present invention are provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the features in the following embodiments and examples may be combined with each other without conflict.

In the field of interventional medical devices, a "distal end" and a "distal segment" are defined as an end or a segment away from an operator during a surgical procedure, and a "proximal end" and a "proximal segment" are defined as an end or a segment close to the operator during the surgical procedure.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be understood broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; the connection can be mechanical connection, electrical connection or communication connection; either directly or indirectly through intervening media, either internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present invention, "axial" generally refers to the axial direction of the distal end and the proximal end, and may be understood as the direction of the central axis or the direction parallel to the central axis, although "axial" may sometimes refer to the axial direction of the axially symmetric element itself. "radial" refers to a direction perpendicular to the "axial" direction.

Fig. 1A to 1E show a transapical mitral valve replacement conveyor according to the present invention. The utility model discloses a through apex cordis mitral valve replacement conveyer's proximal segment has handle shell 10 from outer to interior in proper order, well pipe 20, inner tube 30, well core pipe 51 and tether 52, the near-end still is equipped with and pushes away knob 40 and locking head 53 forward, the distal segment is handle shell 10 from outer to interior respectively, withdraw knob 60, outer tube 70, well pipe 20 distal end, inner tube 30 distal segment, well core pipe 51 distal segment and tether 52 distal segment, the distal segment is outer tube 70 that connects gradually respectively from the near-end to the distal end, transition connector 75, valve holds pipe 85 and sheath pipe box 90 and holds the pipe 85 to dismantle the near-end connecting piece 82 that links together with transition connector 75 and valve, hold pipe 85 and sheath pipe box 90 to dismantle the distal end connecting piece 88 that links together, and the valve of arranging in valve holding in pipe 85 that is connected with the inner tube 30 distal end and close up the pipe 35.

As shown in fig. 2A and 2B, the handle case 10 of the present example may be a whole body formed by two symmetrical half cases that are covered and closed in an axisymmetric manner, and the edge of the case may have a plurality of screw holes that are respectively screwed into the screw holes at symmetrical positions of the two half cases to be covered and connected. The inner wall of the handle shell 10 at the near section is provided with a plurality of axial reinforcing ribs 11 at the near section, and the axial reinforcing ribs are axially and fixedly arranged on the inner wall of the near section of the handle shell; a plurality of proximal radial reinforcing ribs 12 are radially and fixedly arranged on the proximal inner wall of the handle shell; the proximal axial ribs 11 and the proximal radial ribs 12 can be attached to the outer wall of the middle tube 20 to increase the stability of the middle tube 20 when it is rotated (see the examples described later). The inner wall of the far section of the handle shell 10 is provided with a plurality of far section axial reinforcing ribs 13 which are axially and fixedly arranged on the inner wall of the far section of the handle shell 10; a plurality of far-section radial reinforcing ribs 14 are radially and fixedly arranged on the far-section inner wall of the handle shell 10; the distal axial ribs 13 and the distal radial ribs 14 may fit over the outer walls of the transition piece 75 and the proximal connector 82 to allow the transition piece 75 and the proximal connector 82 to be retracted horizontally and linearly without rotation (see the examples described below). The proximal outer wall of the handle shell 10 has a number of corresponding circumferential female rings 15 or circumferential male rings (see in particular the examples described later). The handle housing 10 has an open cavity at the distal section, a frame 16 is arranged around the open cavity, the frame 16 defines the open cavity, and a ring of grooves 161 for locking are arranged on the frame wall at the distal end and/or the frame wall at the proximal end of the frame 16 (see the example of the retraction knob 60 described later for the functions of the frame 16 and the grooves 161). The distal section of the handle shell has a shell aperture 17 through it that can be used to look over the scale on the inner tube 30 to determine the delivery location. The inner wall of the distal section of the handle housing 10 has a plurality of axially disposed positioning plates 18, and the positioning plates 18 are engageable with guide plates 72 at the proximal end of the outer tube 70 to prevent rotation of the outer tube 70 such that the outer tube 70 can only be moved proximally by the retraction knob.

As shown in fig. 3, in this example, the middle tube 20 is inserted into the handle shell 10 and can rotate in the handle shell 10, the proximal end of the middle tube 20 is connected with the proximal forward push knob 40 in a snap-fit manner, and the distal end may extend into the proximal end of the outer tube 70, or may not extend into the proximal end of the outer tube 70. The inner surface of the middle pipe 20 is provided with middle pipe internal threads 21 which can be matched and connected with the inner pipe external threads on the outer surface of the inner pipe 30. The outer wall of the proximal end of the middle tube 20 is provided with at least one axial clamping plate 22; the axial clamping plate 22 of the middle pipe 20 is embedded in the axial groove of the forward push knob 40, so that the middle pipe 20 is driven to rotate by the circumferential rotation of the forward push knob 40. Another example is a proximal outer wall of the middle tube 20 having at least one axial groove; the axial clamping plate of the forward-push knob 40 is embedded in the axial groove of the middle pipe 20, so that the circumferential rotation of the forward-push knob 40 drives the middle pipe 20 to rotate, which is not shown in the figure. When the middle pipe 20 rotates, the outer wall can be attached to the proximal axial reinforcing rib 11 and the proximal radial reinforcing rib 12 of the handle shell 10 and supported by the proximal axial reinforcing rib, so that the middle pipe 20 does not shake due to the fact that the middle supporting force is not enough due to too long rotation of the middle pipe 20.

As shown in fig. 1C, fig. 2B and fig. 4A-4B, in this example, the proximal section of the inner tube 30 is inserted inside the middle tube 20, the middle section of the inner tube 30 passes through the outer tube 70 and the transition piece 75 in sequence until its distal end is inserted inside the proximal end of the valve accommodating tube 85, and the distal end of the inner tube 30 abuts against the proximal end of the valve restraining tube 35 pre-positioned inside the valve accommodating tube 85. The proximal outer surface of the inner tube 30 has inner tube external threads 31, and the inner tube external threads 31 mate withThe middle tube 20 is connected to the middle tube internal thread 21, and the rotation of the middle tube 20 can drive the inner tube 30 to push the valve contraction tube 85 towards the distal end. The outer wall of the inner tube 30 is provided with scales, so that the conveying progress can be observed through the shell hole 17 at the far section of the handle shell 10. In order to prevent the inner tube 30 from rotating, and to be moved linearly toward the distal end by the rotating middle tube 20, the outer circumferences of the radial cross sections of the middle section and the distal section (the middle section and the distal section except for the proximal external thread) of the inner tube 30 are set to be non-circular. The inner ring of the radial cross section of the transition piece 75 is configured to be non-circular, which is matched with the outer ring of the radial cross section of the middle section and the distal section of the inner tube 30 in shape and size, so that the middle section and the distal section of the inner tube 30 are inserted into the transition piece 75 and cannot rotate, the transition piece 75 limits the rotation of the inner tube 30, and the inner tube can only move linearly toward the distal end (see the following example). The outer ring of the radial section of the middle section and the far section of the inner tube 30 can be designed into a D shape, a square shape,

The shape is square or polygonal, even the shape can be star-shaped, or the outer surface has a plurality of bulges, etc., and the shapes can be various non-circular shapes. The inner tube 30 has a proximal end fixing ring 32 on its inner surface, which can be attached to the outer surface of the proximal section of the core tube 51 to provide support for the core tube 51 and maintain the concentricity of the core tube 51 and the stability of the system (see the following example). As shown in fig. 4C-4D, the inner tube 30 is configured to have an inner step 33 at the distal end, and the inner step 33 can be in good mating abutment with the valve constriction tube 35 (see the examples below).

As shown in fig. 5A to 5B, in the present example, the push-forward knob 40 is movably provided at the proximal end of the handle case 10, and the movable arrangement is intended to allow the push-forward knob 40 to freely rotate at the proximal end of the handle case 10 without falling off the proximal end of the handle case 10. Specifically, the distal end inner wall of the forward push knob 40 has a plurality of circumferential protruding rings 42, and the forward push knob 40 is disposed at the proximal end of the handle case 10 by fitting the circumferential protruding rings 42 of the forward push knob 40 into the circumferential recessed rings 15 of the handle case 10, and the circumferential protruding rings 42 of the forward push knob 40 can freely rotate in the circumferential recessed rings 15 of the proximal end of the handle case 10. As another example, the distal end inner wall of the push-forward knob 40 has a plurality of circumferential concave rings, and the push-forward knob 40 is rotatably provided at the proximal end of the handle housing 10 by the circumferential convex rings of the handle housing 10 being fitted into the circumferential concave rings of the push-forward knob 40. Both of these examples pertain to an example in which the distal end of the push knob 40 is fitted over the proximal end of the handle housing 10. Another example not shown in the drawings is an example in which the distal end of the push knob 40 is inserted inside the proximal end of the handle case 10, a plurality of annular convex rings are provided on the outer wall of the distal end of the push knob 40, and annular concave rings are provided on the inner wall of the proximal end of the handle case 10; as yet another example, a circumferential concave ring is provided on the outer wall of the distal end of the push knob 40 and a circumferential convex ring is provided on the inner wall of the proximal end of the handle case 10. Above either kind of mode, all can realize pushing forward the free swivelling joint of knob 40 distal end and handle shell 10 near-end, can both realize the utility model discloses an aim.

In this example, the button wall of the forward knob 40 is snap-fit connected to the proximal tube wall of the middle tube 20, and rotating the forward knob 40 circumferentially rotates the middle tube 20. The proximal inner wall of the push knob 40 has at least one axial groove 41; the axial clamping plate 22 of the outer wall of the proximal end of the middle tube 20 is embedded in the axial groove 41 of the forward push knob 40, so that the circumferential rotation of the forward push knob 40 drives the middle tube 20 to rotate. In another example not shown in the drawings, the inner wall of the proximal end of the push knob 40 has at least one axial catch plate, and the axial catch plate of the push knob 40 is inserted into the axial groove of the middle tube 20, so that the middle tube 20 is rotated by the circumferential rotation of the push knob 40. With either of the two exemplary snap-fit connections described above, the push knob 40 can be configured to stably rotate the middle tube 20 such that the middle tube 20 can stably push the inner tube 30 forward and thereby push the valve pinching tube 35 connected to the distal end of the inner tube 30 to distally deliver the prosthetic valve. Of course, it is also an example that the axial catch plate may be disposed on the inner wall of the proximal end of the middle tube 20, and the axial groove is disposed on the outer wall of the proximal end of the forward push knob 40, so that the axial catch plate on the inner wall of the proximal end of the middle tube 20 is snap-connected into the axial groove on the outer wall of the proximal end of the forward push knob 40 to achieve the snap-connection. As yet another example, the axial groove is formed in the proximal inner wall of the middle tube 20, and the axial catch is formed in the proximal outer wall of the forward knob 40, so that the axial catch on the proximal outer wall of the forward knob 40 is snap-connected into the axial groove formed in the proximal inner wall of the middle tube 20. Any clamping manner can be adopted as long as the forward push knob 40 and the middle tube 20 can be clamped in the circumferential rotation. The push knob 40 has a push washer 43 interposed between the inner proximal wall of the handle housing 10 and the outer proximal wall of the middle tube 30 to reduce friction between the handle housing 10 and the middle tube 20 when rotated.

As shown in FIG. 6, in the present example, the central core tube 51 is inserted through the inner tube 30 at the middle section, and the proximal end thereof passes through the proximal end of the forward push knob 40; the proximal section of the core tube 51 fits through the proximal end fixing ring 32 of the inner tube 30, and the proximal end fixing ring 32 provides a supporting force to the core tube 51, so as to maintain the coaxiality of the core tube 51 and the stability of the system. The far end of the central tube 51 is positioned in the middle section or the far section of the inner tube 30, the far end outer wall of the central tube 51 is sleeved with a far end fixing ring 511, the peripheral wall of the outer wall of the far end fixing ring 511 is provided with a circle of rubber ring 512, and the inner wall of the inner tube 30 is pressed on the rubber ring 512 at the far end of the central tube 51 so as to seal and isolate the artificial valve in the valve accommodating tube 85 from the outside.

Continuing with FIG. 6, in this example, the distal end of the locking head 53 is movably and rotatably coupled to the proximal end of the push knob 40. The movable and rotatable connection between the distal end of the locking head 53 and the proximal end of the forward knob 40 may be the same as the rotatable connection between the forward knob 40 and the handle housing 10, which is not described herein, so that the forward knob 40 may be rotated without the locking head 53 rotating. A locking knob 531 with a sealing ring is provided on the middle section of the locking head 53, a nut (not shown) is provided on the proximal end of the locking head 53, and the proximal end of the core tube 51 is fixed in the distal end of the locking head 53.

As shown in FIG. 1C, in this example, the tether 52 is passed through the core tube 51 at a middle portion thereof, the distal end of the tether 52 is passed through the core tube 51 to be connected to the prosthetic valve, and the proximal end of the tether 52 is passed through the proximal end of the locking head 53 and can be doubly locked by the locking knob 531 and/or the nut.

As shown in fig. 7, the outer tube 70 of the present example is inserted into the distal section of the handle case 10, and the distal section of the handle case 10 is fitted over the outer tube 70. The distal end of the middle tube 20 may extend all the way into the proximal end of the outer tube 70, i.e. the outer tube 70 is located between the distal section of the handle housing 10 and the distal end of the middle tube 20, although it is also possible that the middle tube 20 does not extend into the proximal end of the outer tube 70. But an inner tube 30 extends from the distal end of the middle tube 20 through the outer tube 70. A tube hole 711 is further formed through the wall of the outer tube 70, the position of the tube hole 711 corresponds to the position of the shell hole 17 of the handle shell 10, and scales on the wall of the inner tube 30 can be observed through the shell hole 17 and the tube hole. The outer surface of the middle section of the outer tube 70 has an outer tube external thread 71, and the outer tube external thread 71 is connected with the knob internal thread 61 of the retraction knob 60 disposed in the cavity of the distal section of the handle case 10 in a matching manner, so that the outer tube 70 can be driven to be linearly retracted toward the proximal end when the retraction knob 60 is rotated. The proximal end of the outer tube 70 is a cylindrical tube, and the outer wall of the cylindrical tube is provided with a plurality of guide plates 72 arranged axially; the guide plate 72 can be engaged with the positioning plate 18 on the inner wall of the distal section of the handle housing 10, so that the outer tube 70 can be non-rotatably withdrawn and can only be moved in a linear manner proximally by the withdrawal knob 60. The far end of the outer tube 70 is a round tube 73, and the outer wall of the round tube 73 is provided with a cut hole 74 with a pair of walls; the distal tube 73 of the outer tube 70 is insertable into the proximal end of the transition piece 75 with a cut-out 74 for secure attachment to the transition piece 75.

As shown in fig. 8, the retraction knob 60 of the present example is provided in an open cavity of the distal section of the handle case 10, and the retraction knob 60 is fitted over the outer tube 70. The inner surface of the retraction knob 60 has inner knob threads 61, the inner knob threads 61 are cooperatively connected with the outer tube threads 71, and the outer tube 70, the valve accommodating tube 85 and the sheath 90 connected with the outer tube 70 are retracted proximally by rotating the retraction knob 60 to release the prosthetic valve. The retraction knob 60 has an inner knob ring 63 with knob internal threads 61 disposed on an inner surface of the inner knob ring 63; the outer button ring 64 is sleeved outside the inner button ring 63; the supporting ring 65 is located between the inner button ring 63 and the outer button ring 64 for fixedly connecting the inner button ring 63 and the outer button ring 64, so that the outer circumference of the outer button ring 64 can be enlarged to facilitate rotation without increasing material and weight. The withdrawing knob 60 is provided with a circle of protrusions 62 for clamping on the far-end side and the near-end side respectively, the protrusions 62 of the withdrawing knob 60 are embedded in the grooves 161 of the square frame 16 of the handle shell 10, so that the withdrawing knob 60 cannot sway left and right and is more tightly attached to the handle shell 10, thereby well limiting the withdrawing knob 60, and improving the stability of the withdrawing knob 60 in the withdrawing process and the stability of the withdrawing process of the valve accommodating tube 85 and the sheath tube sleeve 90 which are connected together by the outer tube 70 and the outer tube 70 which are arranged in the withdrawing knob 60 in a penetrating way. In a further example, the protrusion 62 for locking is a plurality of protrusion columns (as shown in the figure) uniformly arranged in a circle, and the protrusion columns are uniformly embedded in the groove 161 of the handle case 10; in another further example, the locking protrusion 62 is a ring-shaped protrusion that is engaged with the groove 161 of the handle case 10. The retraction knob 60 may also have two retraction washers 66 disposed on the proximal and distal surfaces of the retraction knob 60 that fit over the outer tube 70 and snap into the protrusions 62 for reducing friction during rotation and improving stability during rotation. The protrusion 62 has a width smaller than that of the retraction washer 66, and the retraction knob 60 is rotatably coupled to the handle case 10 by the retraction washer 66.

As shown in fig. 9A to 9D, in this example, the transition piece 75 is a pipe with an external thread, and the middle section and the distal section of the inner pipe 30 can pass through the transition piece 75, so that the transition piece 75 can prevent the inner pipe 30 from being rotated and can only be driven by the middle pipe 20 to advance straight to the distal end, the inner ring of the radial section of the transition piece 75 is designed to have a non-circular shape and a size that are the same as the outer ring of the inner pipe 30, for example, the outer ring of the radial section of the middle section and the distal section of the inner pipe 30 is designed to have a D shape, and the inner ring of the radial section of the transition piece 75 is also designed to have a D shape, so that the inner pipe 30 can be prevented from being rotated by the middle pipe 20 under the limitation of the transition piece 75. Similarly, if the outer ring of the radial cross section of the middle section and the distal section of the inner tube 30 is designed to be square-shaped,

Shaped, square or polygonal, with a plurality of protrusions, star-shaped, etc., the inner circumference of the radial cross-section of the transition piece 75 is correspondingly designed as square,

Shaped, square or polygonal, with a number of recesses, star-shaped, etc., provided that the cross-sectional shape isThe non-circular shape can achieve the purpose of the present invention that the inner tube 30 is not rotatable. The proximal end of the transition piece 75 is a flanged pipe 76, the flanged pipe 76 is inserted through the outer tube 73 at the distal end of the outer tube 70, a pair of through-wall through holes 77 are formed at corresponding positions on the flanged pipe 76, and a pair of fixing rods 78 are respectively inserted through the through holes 77 of the transition piece 75 and the cut holes 74 of the outer tube 70, so that the transition piece 75 is fixedly connected to the distal end of the outer tube 70. So that the outer tube 70 can be stably retracted during the retraction process without the valve accommodating tube 85 falling off. The inner wall of the flange tube 76 and the outer wall of the circular tube 73 may be further bonded by an adhesive to stably and fixedly connect the transition piece 75 to the distal end of the outer tube 70 and to seal the inside of the transition piece 75. The outer tube 70 and the valve accommodating tube 85 are firmly connected together by the firm connection of the transition piece 75 and the outer tube 70, and can be conveniently detached when detached, in this example, by providing a pair of cut holes 74 on the outer tube 70, providing the transition piece 75 detachably connected to the proximal end of the valve accommodating tube 85, providing the corresponding through holes 77 on the transition piece 75, and then inserting the fixing rods 78 into the through holes 77 of the transition piece 75 and the cut holes 74 of the outer tube 70. The distal end of the transition piece 75 is a transition piece cylindrical tube that can be inserted into and attached to the proximal end of the valve receiving tube 85. The outer surface of the transition piece barrel distal to the transition piece 75 has an axial projection 791 or axial groove whereby it can be coupled to the valve receiving tube 85 to prevent relative rotation. In the process that the transition connector 75 is driven by the outer tube 70 to be retracted to the near end, the distal axial reinforcing rib 13 and the distal radial reinforcing rib 14 are arranged on the inner wall of the distal section of the handle shell 10, and the outer wall of the transition connector 75 can only be attached to the axial reinforcing rib 13 and the distal radial reinforcing rib 14, so that the rotation of the transition connector 75 is limited and can only be retracted to the near end horizontally.

In this example, the valve receiving tube 85 is a circular tube with the valve constricting tube 35 pre-positioned inside. The distal end of the inner tube 30 extends into the proximal end of the valve containment tube 85 and connects to the proximal end of the valve containment tube 35 pre-positioned therein. The transition piece circular tube distal to the transition piece 75 is inserted into the flare proximal to the valve receiving tube 85. The junction of the distal end of the transition piece 75 and the proximal end of the valve containment tube 85 has a lumen sealing gasket 851, with the lumen sealing gasket 851 fitting over the outer periphery of the distal section of the inner tube 30, and with the lumen sealing gasket 851 being held against a flared step at the proximal end of the valve containment tube 85 by a transition piece cylindrical tube at the distal end of the transition piece 75. Further, the inner surface of the proximal end of the valve accommodating tube 85 is provided with an axial groove 852, the proximal end of the valve accommodating tube 85 is flared and sleeved outside the transition piece circular tube at the distal end of the transition piece 75, and an axial protrusion 791 outside the transition piece circular tube of the transition piece 75 is embedded in the axial groove 852 of the valve accommodating tube 85 to form clamping connection so as to prevent relative rotation of the two. In another example, not shown, the transition piece barrel outer surface at the distal end of the transition piece 75 is provided with an axial groove; the inner surface of the proximal end of the valve accommodating tube 85 is provided with an axial convex block, the flared proximal end of the valve accommodating tube 85 is sleeved outside the circular tube of the transition piece at the distal end of the transition piece 75, and the axial convex block of the valve accommodating tube 85 is embedded in the axial groove of the transition piece 75 to form clamping connection so as to prevent relative rotation of the two. In a preferred example, the outer surface of the valve accommodating tube 85 is provided with an outer tube reinforcing rib which is provided with an indicator, such as a 'K' -shaped indicator, and since the mitral valve ring is not circular but is of a similar D-shaped structure, in order to match with the human body structure, the outer support of the artificial mitral valve is also of a D shape, and in order to better install the artificial mitral valve on the mitral valve, the 'K' -shaped structure is arranged on the outer surface of the valve accommodating tube to serve as the indicator of the valve direction. In this example, the distal outer surface of the valve accommodating tube 85 is provided with axial protrusions 853, whereby the valve accommodating tube 85 and the sheath 90 can be prevented from relative rotation, see in particular the example described later.

In this example, the valve cinching tube 35 is a hollow tube that is pre-placed within the valve receiving tube 85. The valve converging tube 35 has a flared structure inside, the flared structure opens to the distal end, and the valve prosthesis can be compressed inside. When the valve prosthesis is pre-folded, the proximal end of the valve prosthesis is folded at the trumpet-shaped structure, and the other part is located in a larger space in the valve accommodating tube 85. The proximal outer wall of the valve cinch tube 35 is configured to have an outer step 351 and the inner step 33 of the inner tube 30 fits over and abuts the outer step 351 of the valve cinch tube 35. In another example, the proximal inner wall of the valve cinching tube 35 is provided as an inner step and the distal outer wall of the inner tube 30 is provided with an outer step, and the inner step of the valve cinching tube 35 is fitted over the outer step of the inner tube 30 to form an abutment. This way the object of the invention can be achieved.

In this example, a sheath 90, shown in figures 10A-10B, serves as a delivery channel for the prosthetic valve and is attached to the distal end of the valve-containing tube 85. Rotation of the middle tube 20 causes the inner tube 30 to push against the valve pinching tube 35 to deliver the prosthetic valve distally along the central axis of the sheath 90. The sheath tube 90 has a sheath tube base 91, an inner sheath tube 92, and an outer sheath tube 93. The sheath base 91 is located at the proximal end of the sheath tube and has a cavity therein, and the distal end of the valve accommodating tube 85 is inserted into the cavity of the sheath base 91. The distal end of the cavity has a stepped opening, a sheath sealing gasket 94 (not shown in fig. 10B, see fig. 1C) is disposed at the stepped opening of the sheath tube base 91 of the sheath tube housing 90, the distal end of the valve accommodating tube 85 is pressed against the sheath sealing gasket 94, and the distal end of the valve accommodating tube 85 is sealingly connected in the sheath tube base 91 of the sheath tube housing 90 by the sheath sealing gasket 94. To prevent relative rotation between the valve receiving tube 85 and the sheath 90 during delivery and retraction. In the present example, an axial groove 911 is formed in the inner surface of the sheath tube base 91 at the proximal end of the sheath tube sleeve 90, the proximal end of the sheath tube sleeve 90 is sleeved outside the distal end of the valve accommodating tube 85, and the axial protrusion 853 of the valve accommodating tube 85 is embedded in the axial groove 911 of the sheath tube sleeve 90 to form a snap joint so as to prevent relative rotation. In another example not shown in the figures, an axial protrusion may be further provided on the inner surface of the sheath base 91 at the proximal end of the sheath sleeve 90, an axial groove is provided on the outer surface of the distal end of the valve accommodating tube 85, the proximal end of the sheath sleeve 90 is sleeved outside the distal end of the valve accommodating tube 85, and the axial protrusion of the sheath sleeve 90 is embedded in the axial groove of the valve accommodating tube 85 to form a snap joint so as to prevent relative rotation. Although not shown in the drawings, the object of the present invention can be achieved. The proximal end of the inner sheath 92 is attached to the distal end of the sheath mount 91. The outer sheath tube 93 is sleeved outside the inner sheath tube 92, and the smoothness and hardness of the inner wall of the inner sheath tube 92 are greater than those of the outer sheath tube 93. The proximal end of the outer sheath 93 is attached to the distal end of the sheath mount 91. In a preferred example, the outer wall of the outer sheath 93 has a scale, and the retraction end point can be determined according to the scale, and the distal end of the outer sheath 93 has a developing ring 95, and the retraction position is determined according to the developing ring 95 and the scale.

As shown in FIG. 11A, in this example, the proximal connector 82 is provided so that the distal end of the transition piece 75 is more securely inserted within the proximal end of the valve receiving chamber 85. A proximal connector 82 is sleeved over the periphery of transition piece 75 at its distal end to the proximal end of valve receiving lumen 85. The proximal connector 82 is a cylinder, and may be formed by two half-cylinder shells symmetrically covered and assembled, and the two side walls are fixedly connected by bolts. The proximal connector 82 is detachably connected at both ends to the transition piece 75 and the valve accommodating tube 85, respectively, and the transition piece 72 and the valve accommodating tube 85 are firmly connected together by the proximal connector 82.

The present example provides the solution that both ends of the proximal connector 82 are detachably connected to the transition piece 75 and the valve accommodating tube 85, respectively, and specifically, the outer surface of the middle section of the transition piece 75 is provided with external transition threads 751; the proximal inner surface of proximal connector 82 has proximal member internal threads 821 that matingly engage proximal member internal threads 821 of proximal connector 82 via external transition threads 751 of transition piece 75 to thereby sleeve proximal connector 82 over the exterior of transition piece 75. The proximal outer surface of the valve containment tube 85 has a ring of tube protrusions 854; the distal inner surface of the proximal connector 82 has a ring of barbs 822, and the tube protrusions 854 of the valve accommodating tube 85 are hooked on the barbs 822 of the proximal connector 82, so that the proximal connector 82 is sleeved outside the proximal end of the valve accommodating tube 85. In this manner, the transition piece 75 can be detached from the valve receiving tube 85 by simply rotating the proximal connector 82 such that the proximal piece internal threads 821 of the proximal connector 82 disengage from the transition external threads 751 of the transition piece 75.

As another example (not shown), the transition piece 75 may have a ring of tube protrusions on the outer surface of the mid-section; the inner surface of the proximal end of the proximal connector 82 is provided with a circle of hooking protrusions, and the hooking protrusions at the proximal end of the proximal connector 82 are hooked by the tube protrusions of the transition connector 75, so that the proximal connector 82 is sleeved outside the transition connector 75. The proximal outer surface of the valve receiving tube 85 has external tube threads. The distal inner surface of the proximal connector 82 has proximal piece internal threads that mate the outer threads of the valve containment tube 85 to the proximal piece internal threads of the proximal connector 82, thereby sleeving the proximal connector 82 over the proximal exterior of the valve containment tube 85. This also allows the transition piece 75 to be removed from the valve housing tube 85 by simply rotating the proximal connector 82 so that the proximal piece internal threads of the proximal connector 82 disengage from the valve housing tube 85 external threads. Although not shown in the drawings, this example can also achieve the object of the present invention. As mentioned above, the arrangement of the distal axial stiffener 13 and the distal radial stiffener 14 on the inner wall of the distal portion of the handle housing 10, the outer wall of the proximal connector 82 can only be attached to the axial stiffener 13 and the distal radial stiffener 14 during the process of the proximal connector 82 advancing along with the transition connector 75, so as to limit the rotation of the proximal connector 82 and only retract horizontally to the proximal end.

In this example, the distal connector 88 is provided for the distal end of the valve receiving tube 85 to be more securely inserted within the proximal end of the sheath 90, as shown in FIG. 11B. A distal connector 88 is fitted over the periphery of the distal end of the valve accommodating tube 85, which is connected to the proximal end of the sheath 90. The distal connector 88, like the proximal connector 82, is also cylindrical and may be formed by two semi-cylindrical shells that are symmetrically covered and assembled, with the two sidewalls being fixedly connected by bolts. The two ends of the distal connecting piece 88 are detachably connected with the valve accommodating tube 85 and the sheath sleeve 90 respectively, and the valve accommodating tube 85 and the sheath sleeve 90 are firmly connected together through the distal connecting piece 88.

The present example provides the option of removably attaching both ends of the distal connector 88 to the valve containment tube 85 and the sheath 90, respectively. Specifically, the outer surface of the middle section of the valve accommodating tube 85 has external threads 855; the proximal inner surface of the distal connector 88 has distal member internal threads 881 that mate with the distal member internal threads 881 of the distal connector 88 via the valve receiving tube 85 external threads 855, thereby sleeving the distal connector 88 outside of the valve receiving tube 85. The distal inner surface of the distal connector 88 has a ring of barbs 882; the outer surface of the sheath tube base 91 at the proximal end of the sheath tube 90 is provided with a ring of tube protrusions 912, the tube protrusions 912 of the sheath tube 90 are hooked on the hooks 882 of the distal connector 88, and thus the distal connector 88 is sleeved outside the proximal end of the sheath tube 90. This also allows the valve containment tube 85 to be detached from the sheath 90 by simply rotating the distal connector 88 such that the distal connector internal threads 881 of the distal connector 88 disengage from the valve containment tube 85 external threads 855.

As another example (not shown), the valve accommodating tube 85 may have a loop of tube protrusion on the outer surface of the middle section; the inner surface of the proximal end of the distal connecting piece 88 is provided with a circle of hooking protrusions, and the hooking protrusions at the proximal end of the distal connecting piece 88 are hooked by the tube protrusion of the valve accommodating tube 85, so that the distal connecting piece 88 is sleeved outside the valve accommodating tube 85. The outer surface of the proximal end of the sheath tube base 91 of the sheath tube 90 is provided with tube external threads; the distal inner surface of the distal connector 88 is provided with a distal inner thread, and the outer thread of the sheath hub 90 is fittingly coupled to the distal inner thread of the distal connector 88, so that the distal connector 88 is coupled to the proximal outer portion of the sheath hub 90. This also allows the valve-housing tube 85 to be removed from the sheath 90 by simply rotating the distal connector 88 so that the distal connector internal threads of the distal connector 88 disengage from the sheath external threads of the sheath 90. Although not shown in the drawings, this example can also achieve the object of the present invention.

The using method of the trans-apex mitral valve replacement conveyor of the utility model comprises the following steps:

s1, using an external pre-loader, the prosthetic mitral valve is loaded into the valve containment tube 85, the proximal tether 52 (not shown) is crimped inside the trumpet-like structure of the valve cinching tube 35, and the tether 52 is pulled out of the other end of the valve cinching tube 35.

S2, the transition connector 75 is connected with the valve accommodating tube 85 through the proximal connector 82, the valve accommodating tube 85 is connected with the sheath sleeve 90 through the distal connector 88, and the tether 52 passes through the central core tube 51 and extends and is pulled out from the locking head 53 at the proximal end for standby.

S3, rotating the forward push knob 40, wherein the axial groove 41 of the forward push knob 40 is clamped on the axial clamping plate 22 at the proximal end of the middle tube 20, and driving the middle tube 20 to rotate. The middle tube internal thread 21 of the middle tube 20 is in threaded connection with the inner tube external thread 31 of the inner tube 30, and drives the inner tube 30 to move axially and distally. Since the distal end of the inner tube 30 abuts the valve constricting tube 35, the valve constricting tube 35 and the inner prosthetic mitral valve are pushed together to move linearly towards the distal end until reaching the distal end of the sheath sleeve 90.

And S4, preparing for releasing the artificial valve. The locking knob on the locking head 53 is rotated to lock the tether 52, so as to prevent the prosthetic valve from impacting the inner wall of the heart due to too much impact force when the prosthetic valve is ejected out of the delivery device in the release process of the prosthetic valve.

S5, the retracting knob 60 is rotated, the retracting knob 60 drives the outer tube 70 to axially move (move towards the proximal end) without rotating, and the outer tube 70 sequentially drives the valve accommodating tube 85 and the sheath sleeve 90 to move towards the proximal end together in a retracting manner, so that the artificial valve is gradually released.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A transapical mitral valve replacement conveyor, the transapical mitral valve replacement conveyor having:

the method is characterized in that:

the side surface of the far end and/or the side surface of the near end of the withdrawing knob are/is provided with a circle of protrusions for clamping, and the protrusions of the withdrawing knob are embedded in the grooves of the handle shell.

2. The transapical mitral valve replacement conveyor of claim 1, wherein the ring of protrusions for locking are a plurality of protrusions evenly arranged in a ring, and the protrusions are evenly embedded in the grooves of the handle housing.

3. The transapical mitral valve replacement conveyor of claim 1, wherein the ring of detents is a ring of tabs that snap into a groove in the handle housing.

4. The transapical mitral valve replacement transporter of claim 1, wherein the retraction knob has:

and the two withdrawing gaskets are arranged on the proximal end surface and the distal end surface of the withdrawing knob, sleeved outside the outer pipe and clamped in the bulges.

5. The transapical mitral valve replacement conveyor of claim 4, wherein the projection has a width that is less than a width of the retraction washer, the retraction knob being rotatably connected to the handle housing by the retraction washer.

6. The transapical mitral valve replacement transporter of claim 1, wherein the retraction knob has:

the knob inner thread is arranged on the inner surface of the inner knob ring;

the outer button ring is sleeved outside the inner button ring;

and the support ring is positioned between the inner button ring and the outer button ring and is used for fixedly connecting the inner button ring and the outer button ring.

7. The transapical mitral valve replacement transporter of claim 1,

the inner wall of the handle shell is provided with a plurality of axially arranged positioning plates, and the guide plates can be clamped on the positioning plates.

8. The transapical mitral valve replacement conveyor of claim 1, further comprising:

a valve constricting tube, which can be pre-arranged in the valve accommodating tube;

the proximal section of the inner pipe penetrates through the inner part of the middle pipe, the distal section of the inner pipe penetrates through the proximal end of the valve accommodating pipe, the distal end of the inner pipe is connected with the valve contraction pipe, the outer surface of the proximal end of the inner pipe is provided with inner pipe external threads, and the inner pipe external threads are connected to the middle pipe internal threads in a matched mode;

and the front push knob is arranged at the near end of the handle shell, and the button wall of the front push knob is connected to the near-end pipe wall of the middle pipe in a buckling manner.

9. The transapical mitral valve replacement conveyor of claim 8, further comprising:

the inner surface of the near end of the inner tube is provided with a circle of near end fixing rings, and the near end of the central core tube is attached to and penetrates through the near end fixing rings of the inner tube;

the utility model discloses a well core pipe, including well core pipe, the outer wall cover of well core pipe is equipped with the solid fixed ring of distal end, the outer wall circumference of the solid fixed ring of distal end is equipped with a rubber circle, the inner wall of inner tube compresses tightly the rubber circle of well core pipe distal end is circled.

10. The transapical mitral valve replacement conveyor of claim 9, further comprising:

and the tether is arranged in the central core tube in a penetrating way, and the proximal end of the tether penetrates out of the proximal end of the locking head and can be locked by the locking knob and/or the nut.

11. The transapical mitral valve replacement conveyor of claim 8, wherein the transapical mitral valve replacement conveyor has:

12. The transapical mitral valve replacement transporter of claim 8,

a pipe hole penetrates through the wall of the outer pipe;

a shell hole penetrates through the far section of the handle shell, and the shell hole can correspond to the position of the tube hole;

and scales are arranged on the outer wall of the inner pipe.

13. The trans-apical mitral valve replacement transporter of claim 8, wherein the outer surface of the valve receiving tube has an external tube stiffener with an indicator.

14. The trans-apical mitral valve replacement transporter of claim 1, wherein the sheath sleeve has:

the sheath tube base is positioned at the proximal end of the sheath tube sleeve and is provided with a sheath sealing gasket, and the distal end of the valve accommodating tube is hermetically connected in the sheath tube sleeve by virtue of the sheath sealing gasket;