CN217744469U

CN217744469U - Soft tissue fixing assembly with pushing injection function for orthopedic surgery

Info

Publication number: CN217744469U
Application number: CN202123024503.7U
Authority: CN
Inventors: 何宇; 郭晓勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-11-08
Anticipated expiration: 2031-11-30

Abstract

The utility model provides a soft tissue fixation subassembly that is used for orthopedic operation to have a function of injecting, include: a holder; assembling an appliance; the peripheral wall of the holder includes at least one through hole; the assembly apparatus comprises an implanter, an injector and a push rod, the implanter is removably connected with the fixer, the implanter is connected with the fixer and defines a fluid channel connected with the through hole; the injector is connected with the implanter and communicated with the fluid channel, the injector is used for injecting contents into the fluid channel, and the push rod is operably moved in the fluid channel to push the contents in the fluid channel and make the contents flow out of the through hole of the fixer. By applying the technical scheme, the soft tissue fixing component with the injection function for the orthopedic surgery can be provided, and the injection function of the fixator is realized.

Description

Soft tissue fixing assembly with pushing injection function for orthopedic surgery

Technical Field

The utility model relates to a soft tissue fixing component with a push injection function for orthopedic surgery.

Background

In orthopedic surgery, anchors are often used to repair soft tissue of musculoskeletal attachments, such as tears of the collateral ligaments on the ankle joint side, tears of the collateral ligaments on the knee joint side, tears of the collateral ligaments on the elbow joint side, tears of the glenoid lip of the shoulder joint, tears of the rotator cuff, and the like. When in use, the anchor is implanted into bone tissue of a human body, and then soft tissue suture fixation is carried out through a suture at the tail end of the anchor so as to realize the soft tissue repair of the musculoskeletal attachment part. Generally, patients have strong bone and sufficient anchor holding power, but patients with osteoporosis are increasing as the population ages. In clinical work, the condition of soft tissue injury at a musculoskeletal attachment part, osteoporosis and even severe osteoporosis is frequently encountered, the existing conditions of the complications are not rare clinically, the osteoporosis patients have soft bones and poor strength, and the traditional anchor has a solid structure, although the strength of the anchor is high, the holding force in the soft bones is often insufficient. At this moment, the conventional method is adopted to implant the anchor, so that the situation of anchor failure often occurs, or the situation that the anchor is difficult to insert in the operation and is not fixed firmly, even the anchor is directly pulled out in the suturing process, or the situation that the anchor is pulled out in the rehabilitation exercise process after the operation, potential complications are caused, the functional rehabilitation of the patient is influenced, and even the risk of medical disputes occurs.

The inventor's chinese utility model CN211484850U discloses a hollow porous anchor assembly, which fills or injects contents (such as bone cement or biological agent semi-fluid for promoting healing) into cancellous bone through the hollow structure of the anchor to achieve the stabilization of the instant mechanical structure. However, the conventional anchor driver is generally of a solid structure, has no pushing injection function, is not convenient for high-pressure injection, and is not easy to be matched with a hollow anchor for use.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome not enough among the above-mentioned prior art, provide a soft tissue fixation subassembly that is used for orthopedic operation to have a function of injecting, include:

a holder;

assembling an appliance;

the outer peripheral wall of the holder includes at least one through hole;

the assembling device comprises an implanter, an injector and a push rod, the implanter is removably connected with the fixer, the implanter is connected with the fixer and defines a fluid channel connected with the through hole;

the injector is connected with the implanter and communicated with the fluid channel, the injector is used for injecting contents into the fluid channel, and the push rod is operably moved in the fluid channel to push the contents in the fluid channel and make the contents flow out of the through hole of the fixer.

In a preferred embodiment, the injector comprises a connection tube for receiving the contents, a first end of the connection tube is removably connected to the holder and communicates with the through hole to define the fluid passage, a second end of the connection tube is removably connected to the injector, and a first end of the push rod is capable of extending and moving from the second end of the connection tube to effect the pushing.

In a preferred embodiment, the injector comprises an injector cartridge for containing the contents and communicating to the fluid passage, and a plunger operatively connected to the injector cartridge by a screw thread and for injecting the contents in the injector cartridge and flowing the contents out of the through hole of the holder.

In a preferred embodiment, the injector comprises a first adapter housing connected to the second end of the connecting tube, the second end of the push rod is connected to a second adapter housing detachably connectable to the first adapter housing, the first and second adapter housings are connected to define a handle of the injector when the push rod is disposed within the connecting tube, and the first end of the push rod is reduced in radial dimension to at least partially extend into the anchor and to inject the contents of the anchor.

In a preferred embodiment, the first adapter housing and the second adapter housing are detachably connected by a snap.

In a better embodiment, the injector comprises an injection cylinder for containing contents, and when the injection cylinder is connected with the second end of the connecting tube body, the inner wall of the first adaptive shell is correspondingly clamped with the outer wall of the injection cylinder.

In a more preferred embodiment, the holder is arranged with a suture attachment structure, and the first fitting housing is arranged with a suture receiving groove, and the suture is wound around the suture receiving groove and the suture attachment structure, respectively.

In a preferred embodiment, the first end of the connecting tube is removably connected to the holder by a screw thread.

In a preferred embodiment, the second end of the connecting tube body comprises a port for connection to a fluid passage, the port being tapered in radial dimension towards the first end of the connecting tube body.

In a preferred embodiment, the injector comprises a connector for pushing out the contents, and the connector is connected with the interface in a shape fitting manner.

In a preferred embodiment, the first end of the connecting tube is connected to the holder by a snap structure; the push rod is operable to extend into or out of the retainer to alternately shift the catch structure between the locked and unlocked states.

In a better embodiment, the fastening structure comprises an elastic fastener and a fastening hole, the first end of the connecting tube body comprises the elastic fastener, and the fixer comprises the fastening hole; the first end of the connecting pipe body extends into the fixer so that the elastic buckle is clamped to the clamping hole to enable the clamping structure to be in a locking state; the first end of the push rod slides to extend into the fixer to drive the elastic buckle to deform and leave the clamping hole so as to enable the buckle structure to be in an unlocking state.

In a preferred embodiment, the first end of the connecting tube further comprises a polygonal cylinder, and the holder comprises a polygonal hole, which is matched with the polygonal cylinder in shape; when the first end of the connecting pipe body is connected to the fixer, the polygonal cylinder extends into the polygonal hole.

Compared with the prior art, the technical scheme of the utility model following beneficial effect possesses:

the soft tissue fixing component with the injection function comprises a fixer and an assembling tool; the outer peripheral wall of the holder includes at least one through hole; the assembly apparatus comprises an implanter, an injector and a push rod, the implanter is removably connected with the fixer, the implanter is connected with the fixer and defines a fluid channel connected with the through hole; the injector is connected with the implanter and communicated with the fluid channel, the injector is used for injecting contents into the fluid channel, and the push rod can move in the fluid channel in an operating mode to push the contents in the fluid channel and enable the contents to flow out of the through hole of the fixer. Realizes the function of pushing the fixer and has certain high-pressure perfusion function.

In the process of injecting after implanting, buckle structure keeps firm, is convenient for accomplish and injects the operation, and very important simultaneously avoids injecting the in-process content and takes place the seepage at connecting portion, injects the convenient unblock that finishes, and it is convenient to dismantle at last.

Drawings

FIG. 1 is a perspective view of a preferred embodiment of the present invention illustrating the connection of the soft tissue fixation assembly anchor, implant and push rod with a push function;

FIG. 2 is a schematic exploded perspective view of the anchor, the implant and the push rod of the soft tissue fixation assembly with injection function according to the preferred embodiment of the present invention;

FIG. 3 is a schematic perspective view of the injector according to the preferred embodiment of the present invention;

FIG. 4 is a perspective view of a retainer in accordance with a preferred embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of a retainer in accordance with a preferred embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of the injector of the preferred embodiment of the present invention shown in connection with an implanter;

FIG. 7 is an enlarged view of a portion of the circle at position A in FIG. 6;

FIG. 8 is an exploded perspective view of the retainer and the first end of the connecting tube according to the preferred embodiment of the present invention;

fig. 9 is a schematic cross-sectional view of the connection between the connecting tube and the retainer according to the preferred embodiment of the present invention, wherein the locking structure is in a locked state;

fig. 10 is a schematic cross-sectional view of the connection between the connecting tube and the fastener according to the preferred embodiment of the present invention, wherein the push rod extends into the fastener, and the fastening structure is in an unlocked state.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

Certain directional terms used hereinafter to describe the drawings, such as "inner", "outer", "above", "below", and other directional terms, will be understood to have their normal meaning and refer to those directions as they normally relate to when viewing the drawings. Unless otherwise indicated, the directional terms described herein are generally in accordance with conventional directions as understood by those skilled in the art.

The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another.

Referring to fig. 1-6, a soft tissue fixation assembly 100 with a bolus function for orthopedic surgery, the soft tissue fixation assembly 100 with a bolus function comprises a fixator 1 and an assembling tool 2, the fixator 1 comprises an inner cavity 11 extending along an axial direction thereof, the outer peripheral wall of the fixator 1 further comprises at least one through hole 12 communicated with the inner cavity 11, the outer peripheral wall of the fixator 1 is provided with threads, the distal end of the fixator 1 is tapered to facilitate implantation into bone tissue of a patient, the proximal end of the fixator 1 comprises an inlet of the inner cavity 11, and the proximal end of the fixator 1 is further provided with a suture connecting structure 13, and the suture connecting structure 13 is used for connecting sutures.

The mounting device 2 comprises an implanter 21, a syringe 22 and a push rod 23. The implant 21 is removably connected to the holder 1, in this embodiment, the implant 21 includes a connection tube 211 for receiving the content, the first end 2111 of the connection tube is removably connected to the holder 1 by a thread, the proximal end of the holder 1 is provided with a fine thread, the first end 2111 of the connection tube is provided with a fine screw thread, the fine thread is screwed on the fine screw thread and plays a role of fixing the connection tube 211 and the holder 1, and when it is necessary to take off, the connection tube 211 is rotated to separate the holder 1. In some simple alternatives, a screw thread may be provided at the proximal end of the fixator 1, and the first end 2111 of the connecting tube may be provided with a screw thread, without limitation.

The connection tube body 211 has a through channel 2113 extending axially along itself, and when the first end 2111 of the connection tube body is connected to the holder 1, the through channel 2113 is correspondingly connected to the inner cavity 11 to define a fluid channel, and accordingly, the fluid channel is communicated with the through hole 12. In this embodiment, the connecting tube 211 is made of a metal material.

The injector 22 comprises an injector barrel 221 and an injection rod 222, wherein the injector barrel 221 is cylindrical, and the injector barrel 221 is filled with contents which are bone cement or biological agent semifluid for promoting healing. The bottom wall of the plunger 221 comprises a connector 2211 capable of pushing out the content, the second end 2112 of the connecting tube body is provided with a port 2114 connected with the fluid channel, the radial dimension of the port 2114 is gradually reduced towards the first end 2111 of the connecting tube body, the connector 2211 is connected with the port 2114 in a shape fitting manner, and the injection rod 222 is operatively connected with the plunger 221 through threads and is used for injecting the content in the plunger 221. The shape of the fitting 2211 and the interface 2114 are configured to prevent leakage of contents during injection.

The two sides of the injection tube 221 are respectively provided with a handheld portion 2212, and the handheld portions 2212 can facilitate the force applied by two fingers of an operator. The end of the injection rod 222 is provided with a piston 2221, the piston 2221 is in sealing contact with the inner wall of the injection cylinder 221, the outer wall of the injection rod 222 is provided with an external thread, one side of the injection cylinder 221 away from the connector 2211 is provided with a cover 2213, the cover 2213 is provided with an internal thread in threaded connection with the injection rod 222, one end of the injection rod 222 away from the piston 2221 is provided with an operation part 2222, and an operator can rotate the injection rod 222 through the operation part 2222 to realize the sliding of the piston 2221 in the injection cylinder 221 so as to push the contents, so that the contents are pushed out of the connector 2211 and enter the fluid channel from the interface 2114, and finally flow out of the through hole 12. The injector 22 is used to inject the contents into the fluid channel so that the patient's bone tissue is filled with bone cement or a biologic semi-fluid that promotes healing.

In this embodiment, the plunger 22 is removably connected to the second end 2112 of the connecting tube via a luer 2114, i.e., the fitting 2211 is connected to the connector 2114 via the luer 2114. Luer 2114 is of a construction common in the art and will not be described in further detail herein.

The push rod 23 is operable to move within the fluid channel to push the contents of the fluid channel. In operation, the operator first injects the contents into the fluid channel through the plunger 22 under high pressure, and then removes the plunger 22 and extends the first end 231 of the plunger into the second end 2112 of the connecting tube body and moves it to effect the pushing action. The outside diameter of the push rod 23 is a clearance fit with the inside diameter of the through passage 2113, and the push rod 23 slides within the through passage 2113 and pushes the contents of the fluid passage.

The implanter 21 further comprises a first adapting housing 2115 connected to the second end of the connecting tank, a second adapting housing 233 detachably connected to the first adapting housing 2115 is connected to the second end 232 of the push rod, when the push rod 23 is disposed in the connecting pipe 211, the first adapting housing 2115 and the second adapting housing 233 are connected to define the handle 4 of the implanter 21, the radial dimension of the first end 231 of the push rod is reduced to at least partially extend into the inner cavity 11 of the fixator 1 and inject the contents in the fixator 1, and specifically, the first adapting housing 2115 and the second adapting housing 233 are detachably connected by a buckle. In the actual operation process, the first adapting housing 2115 and the second adapting housing 233 are connected in advance to define the handle 4 of the implanting device 21, the operator holds the handle 4 of the implanting device 21 and fixes the fixator 1 on the bone tissue of the patient, then takes down the push rod 23 and the second adapting housing 233 through the snap-fit structure, and after using the injector 22, extends the push rod 23 into the connecting tube 211 until the first adapting housing 2115 and the second adapting housing 233 are connected in a snap-fit manner again. The first end 231 of the push rod is reduced in radial dimension and can penetrate into the inner cavity 11 of the anchor 1 to form a sealing effect to prevent fine bone pieces from entering and blocking the through hole 12 during screwing in the anchor 1, which may affect the subsequent implantation of the contents. After the injector 22 is pushed and removed, the second adapting housing 2115 is mounted, and the residual content in the fluid channel can be pushed in completely in the process of inserting the push rod 23, so that the content is prevented from remaining a tail; during this process, the radial dimension of the first end 231 of the pushrod is reduced to prevent leakage of the contents.

In this embodiment, when the plunger 221 is connected to the second end 2112 of the connecting tube, the inner wall of the first fitting housing 2115 is correspondingly engaged with the outer wall of the plunger 221. The engagement of the first mating housing 2115 with the plunger 221 can stabilize the injector 22 during the injection process, and prevent the interface 2114 from being misaligned with the connector 2211 due to shaking of the plunger 221.

In this embodiment, two sides of the first fitting housing 2115 are further provided with a hanging wire receiving slot 2116, which facilitates the receiving of the suture. In use, suture is threaded around the suture receiving slot 2116 and the suture attachment structure 13, respectively.

Referring to fig. 8 to 10, the first end 2111 of the connecting tube 211 is connected to the fixer 1 by a snap structure; the push rod is operable to extend into or out of the holder 1 to alternate the catch formation between the locked and unlocked states.

The fastening structure comprises an elastic fastener 51 and a fastening hole 52, the first end 2111 of the connecting tube body 211 comprises the elastic fastener 51, and the fixer 1 comprises the fastening hole 52; the first end 2111 of the connecting tube 211 extends into the holder 1 so that the elastic buckle 51 is clamped to the clamping hole 52 to make the buckle structure in a locked state; the first end 231 of the push rod 23 slides to extend into the holder 1 to drive the elastic buckle 51 to deform away from the buckle hole 52 so as to make the buckle structure in an unlocked state. The first end 2111 of the connecting tube 211 further comprises a polygonal cylinder 53, and the holder 1 comprises a polygonal hole 54, wherein the polygonal hole 54 is matched with the polygonal cylinder 53 in shape; when the first end 2111 of the connecting tube 211 is connected to the holder 1, the polygonal cylinder 53 protrudes into the polygonal hole 54.

When the device is used, the fixer 1 is connected with the connecting tube body 211 through a buckle structure, the elastic buckle 51 extends into the fixer 1 to be clamped to the clamping hole 52, at the moment, the push rod 23 does not extend into the fixer 1, and the buckle structure is in a locking state; the push rod 23 is extended into the connecting tube body 211 from the second end 2112 until the first end 231 of the push rod 23 is extended into the interior of the fixator 1, at this time, the push rod 23 pushes the elastic buckle 51 to deform and leave the buckle hole 52, and the buckle structure is in an unlocked state. The elastic clip 51 may be made of nitinol, wherein one of the through holes 12 defines the clip hole 52.

The above, only be the preferred embodiment of the present invention, but the design concept of the present invention is not limited to this, and any skilled person familiar with the technical field is in the technical scope disclosed in the present invention, and it is right to utilize this concept to perform insubstantial changes to the present invention, all belong to the act of infringing the protection scope of the present invention.

Claims

1. A soft tissue fixation assembly with bolus function for use in orthopedic procedures, comprising:

a holder;

assembling an appliance;

the peripheral wall of the holder includes at least one through hole;

the assembly apparatus includes an implanter for fixing a fixture to bone tissue of a patient, an injector removably connected to the fixture, the injector connected to the fixture and defining a fluid passage connected to the through-hole, and a push rod;

the injector is connected with the implanter and communicated with the fluid channel, the injector is used for injecting contents into the fluid channel so that bone tissues of a patient are filled with bone cement or biological agent semi-fluid for promoting healing, and the push rod can move in the fluid channel in an operable mode to push the contents in the fluid channel and enable the contents to flow out of the through hole of the fixator.

2. The soft tissue fixation assembly with bolus function for bone surgery of claim 1 wherein: the implanter comprises a connecting pipe body for receiving contents, the first end of the connecting pipe body is removably connected with the fixer and communicated with the through hole to define the fluid channel, the second end of the connecting pipe body is removably connected with the injector, and the first end of the push rod can extend into and move from the second end of the connecting pipe body to realize pushing and pressing.

3. The soft tissue fixation assembly with bolus function for bone surgery as recited in claim 2, wherein: the injector comprises an injection barrel and an injection rod, the injection barrel is used for containing contents and is communicated with the fluid channel, and the injection rod is operably connected with the injection barrel through threads and is used for injecting the contents in the injection barrel and enabling the contents to flow out of the through hole of the fixer.

4. The soft tissue fixation assembly with bolus function for bone surgery of claim 2 wherein: the implanter comprises a first adaptation shell connected to the second end of the connecting pipe body, the second end of the push rod is connected with a second adaptation shell detachably connected with the first adaptation shell, when the push rod is arranged in the connecting pipe body, the first adaptation shell and the second adaptation shell are connected and define a handle of the implanter, the radial size of the first end of the push rod is reduced to enable at least part of the first end of the push rod to stretch into the fixator and inject contents in the fixator.

5. The soft tissue fixation assembly with bolus function for bone surgery of claim 4 wherein: the first adaptive shell and the second adaptive shell are detachably connected through a buckle.

6. The soft tissue fixation assembly with bolus function for bone surgery of claim 4 wherein: the injector comprises an injection cylinder for containing contents, and when the injection cylinder is connected with the second end of the connecting pipe body, the inner wall of the first adaptive shell is correspondingly clamped with the outer wall of the injection cylinder.

7. The soft tissue fixation assembly with bolus function for use in orthopedic surgery as claimed in claim 4, wherein: the fixer is arranged with stylolite connection structure, the first adaptation casing is arranged with the hanging wire and takes in the groove, and the stylolite winds respectively and connects on hanging wire takes in groove and stylolite connection structure.

8. The soft tissue fixation assembly with bolus function for bone surgery of claim 2 wherein: the first end of the connecting tube body is removably connected with the holder by a thread.

9. The soft tissue fixation assembly with bolus function for bone surgery of claim 2 wherein: the second end of the connecting tube body includes a port for connection to a fluid passage, the port tapering in radial dimension toward the first end of the connecting tube body.

10. The soft tissue fixation assembly with bolus function for use in orthopedic surgery of claim 9, wherein: the injector comprises a connector capable of pushing out the content, and the connector is connected with the interface in a shape matching manner.

11. The soft tissue fixation assembly with bolus function for bone surgery as recited in claim 2, wherein: the first end of the connecting pipe body is connected with the fixer through a buckle structure; the push rod is operable to extend into or out of the holder to alternately shift the catch structure between the locked state and the unlocked state.

12. The soft tissue fixation assembly with bolus function for use in orthopedic surgery of claim 11, wherein: the fastener structure comprises an elastic fastener and a clamping hole, the first end of the connecting pipe body comprises the elastic fastener, and the fixer comprises the clamping hole; the first end of the connecting pipe body extends into the fixer so that the elastic buckle is clamped to the clamping hole to enable the buckle structure to be in a locking state; the first end of the push rod slides to extend into the fixer to drive the elastic buckle to deform and leave the clamping hole so as to enable the buckle structure to be in an unlocking state.

13. The soft tissue fixation assembly with bolus function for use in orthopedic surgery of claim 12, wherein: the first end of the connecting pipe body further comprises a polygonal cylinder, and the fixer comprises a polygonal hole, wherein the polygonal hole is matched with the polygonal cylinder in shape; when the first end of the connecting pipe body is connected to the fixer, the polygonal cylinder extends into the polygonal hole.