CN213345851U - Puncture point scar loosening device - Google Patents

Abstract

The utility model discloses a puncture point scar loosening device, which comprises a loosening needle body, a blade and an operating part; the needle loosening body is provided with a first cavity, the first cavity penetrates through the needle loosening body along the axial direction of the needle loosening body, the blade is arranged on the outer wall, close to the first end of the needle loosening body, the blade is fixedly arranged or rotatably arranged relative to the needle loosening body, the operating part is connected with the second end of the needle loosening body, the operating part is provided with a second cavity penetrating through the operating part, and the first cavity and the second cavity are arranged in a penetrating mode; when the needle is used, the blade part of the blade faces the first end of the release needle, and the first cavity of the release needle is used for accommodating the guide wire and guiding the guide wire to pass through. The utility model provides a puncture point scar release device can replace conventional apparatus (scalpel, tissue scissors or vascular pincers come) to handle the scar to avoid the wound to enlarge or the tissue destruction is serious, thereby guarantee to intervene the wicresoft characteristic of operation.

Description

Puncture point scar loosening device

Technical Field

The utility model belongs to the technical field of medical instrument, concretely relates to puncture point scar release device.

Background

Interventional therapy is a minimally invasive treatment means carried out by modern high-tech means, namely, under the guidance of medical imaging equipment, special catheters, guide wires and other precise instruments are introduced into a human body to diagnose and locally treat internal diseases. The interventional therapy has the characteristics of no operation, small wound, quick recovery and good effect. Therefore, the application in clinic is more and more extensive.

Clinically, some patients may require a second intervention. In the operation process, the scar left by the puncture point after the first operation often causes puncture difficulty and catheter sheath entering difficulty, generally the scar is mostly positioned in the deep part of the body surface, so the scar is treated by using a conventional instrument such as a scalpel, a tissue shear or a vascular clamp in the general conventional operation, but the operation can cause wound enlargement or serious tissue damage, thereby causing complications such as slow postoperative recovery, scar increase or incision infection and the like, and even affecting the long-term patency rate of the blood vessel.

In order to solve the above technical problems, it is necessary to develop a small wound scar convenient for the puncture point

And (4) a loosening device.

SUMMERY OF THE UTILITY MODEL

In order to solve when interveneeing the operation once more clinically, puncture point scar leads to puncture difficulty and the technical problem that the pipe sheath got into the difficulty, the utility model provides a puncture point scar release device.

A puncture point scar loosening device comprises a loosening needle body, a blade and an operating part; the needle loosening body is provided with a first cavity, the first cavity penetrates through the needle loosening body along the axial direction of the needle loosening body, the blade is arranged on the outer wall, close to the first end of the needle loosening body, the blade is fixedly arranged or rotatably arranged relative to the needle loosening body, the operating part is connected with the second end of the needle loosening body, the operating part is provided with a second cavity penetrating through the operating part, and the first cavity and the second cavity are arranged in a penetrating mode; when in use, the blade part of the blade faces the first end of the release needle, and the first cavity of the release needle is used for accommodating a guide wire and guiding the guide wire to pass through.

The utility model relates to a puncture point scar loosening device, which is mainly applied to the situation that scars exist on puncture points in secondary intervention operations, in clinical use, a puncture blood vessel is generally searched by a puncture needle, and if the catheter sheath is difficult to be placed after a guide wire is placed, the loosening device can be adopted; the guide wire is put into the first cavity of the loosening device, then the blade part of the blade is pushed into the proximal end of the body slowly, and the cut is made on the scar by the blade part, so that the catheter sheath can smoothly enter; the utility model provides a puncture point scar loosening device can replace conventional apparatus (scalpel, tissue scissors or vascular forceps) to handle the scar to avoid the wound to enlarge or the tissue destruction is serious, thereby guarantee to intervene the wicresoft characteristic of operation.

Furthermore, the angle value of the included angle between the extension line of the blade part of the blade and the extension line of the first end of the loosening needle is alpha, and the alpha is more than or equal to 45 degrees and less than or equal to 90 degrees.

Further preferably, alpha is more than or equal to 60 degrees and less than or equal to 80 degrees; preferably, 70 DEG-alpha is 75 deg. In such an arrangement, α is more specifically defined, and since the guide wire and the puncture blood vessel generally have a certain angle (for example, 45 ° to 60 °) with respect to the axis, the cutting effect of the blade edge on the scar is optimum when the inclination angle of the blade edge is set within this range.

Further, in the direction perpendicular to the axis of the lytic needle body, the farthest distance between the point on the blade and the outer wall of the lytic needle body is 2mm-5 mm.

Furthermore, the first end of the debonding needle body is close to and wholly is the toper, the first end of the debonding needle body is the less terminal surface of toper area. In the arrangement, the first end of the release needle body is arranged to be conical, so that the first end of the release needle body is sharper, and the puncture capability of the release needle body is better.

Furthermore, a second cavity penetrating through the operating part is arranged on the operating part, wherein the first cavity and the second cavity are arranged in a penetrating manner. In this arrangement, the second lumen is configured to facilitate entry and exit of the guidewire.

Furthermore, scales are arranged on the outer wall of the release needle body. In this arrangement, the scale can be arranged to facilitate the user to determine the specific location of the scar.

Further, the operating part is of a cylindrical structure, and the second cavity penetrates through two end faces of the cylindrical structure; and an anti-skid structure is arranged on the peripheral surface of the cylindrical structure. The operation part is more specifically limited in the arrangement, so that the operation of loosening the scar is convenient.

Furthermore, the blade is fixedly arranged in a rotatable manner relative to the lytic needle, and an accommodating groove is formed in the outer wall of the lytic needle body, which is close to the first end of the lytic needle body; the blade has two mutually switchable locking states, when the blade is in a first state, the blade is completely hidden into the accommodating groove, and the release device is in an unused state; when the blade is in the second locking state, the blade extends out of the accommodating groove, and the loosening device is in a use state. In the arrangement, the blade is of a rotatable structure, can adopt a first locking state when entering a human body, is switched to a second locking state after reaching a scar position, and is switched back to the first locking state after the scar is loosened to exit the human body; the arrangement enables the blade part of the blade to cut the position of the scar only in the process of loosening the scar, and other parts passing through the blade part in the process of entering the human body cannot be cut, so that the wound on the human body can be further reduced.

Further, be provided with first locating part in the holding tank, when using, first locating part with the cutting part of blade offsets for the restriction the blade is to the inclination of the first end of the pine needle body of orientation release. In the arrangement, the arrangement of the first limiting piece can limit the inclination angle of the blade part of the blade, so that the loosening device has a better cutting effect on scars.

Further, first locating part is first spacing block, first spacing block is close to the one side of blade is first spacing face, the blade is in be close to on the cutting part extending direction the tip of the first end of the pine needle body is the first end of blade, the cutting part of blade is circular-arc cutting part in the position that is close to the first end of blade. In the arrangement, the arc-shaped blade part slides along the first limiting surface, so that the blade is switched from the first locking state to the second locking state more smoothly and conveniently.

Further, the first end of the release pin body is further provided with a second limiting part, and when the release pin body is used, the second limiting part abuts against one surface, opposite to the cutting part, of the blade to limit the inclination angle of the blade towards the second end of the release pin body. In the arrangement, the second limiting part is arranged to prevent the blade from inclining backwards, so that the cutting effect is ensured.

Furthermore, the device also comprises a blade pushing rod, wherein the first end of the blade pushing rod is hinged with the second end of the blade; the utility model discloses a set up the cutter blade catch bar, including the release needle body, be provided with on the release needle body and run through the third cavity of release needle body, the extending direction of third cavity with the extending direction of first cavity is parallel, blade catch bar second end by the third cavity stretches out, makes through promoting blade catch bar second end blade catch bar reciprocating motion in the third cavity. In the arrangement, the arrangement structure of the blade pushing rod is simple, and the operability is strong.

Further, still include blade and promote the head, blade promotes the head and is connected with blade catch bar second end, blade promote the head with the operation portion passes through the helicitic texture and connects, the helicitic texture is followed the axial extension of the needle body of releaseing, when using, through the rotation blade promotes the head and makes the blade promotes the head along the axial of the needle body of releaseing is relative operation portion reciprocating motion. In the arrangement, the arrangement of the cutter head pushing head enables the blade to be more conveniently switched between the first locking state and the second locking state; meanwhile, the position of the blade can be limited and locked through the arrangement of the thread structure.

The puncture point scar loosening device provided by the utility model can replace the conventional instruments (such as a scalpel, a tissue scissors or a vascular forceps) to treat scars, thereby avoiding the expansion of wounds or serious tissue damage and ensuring the minimally invasive characteristic of the interventional operation; the blade is in a rotatable structure, can adopt a first locking state when entering a human body, is switched to a second locking state after reaching a scar position, and is switched back to the first locking state after the scar is loosened to exit the human body; the arrangement enables the blade part of the blade to cut the position of the scar only in the process of loosening the scar, and other parts passing through the blade part in the process of entering the human body cannot be cut, so that the wound on the human body can be further reduced.

Drawings

Fig. 1 is a schematic perspective view of a scar loosening device for puncture points in embodiment 1 of the present invention;

fig. 2 is a schematic sectional structure view of a scar loosening device for puncture points in embodiment 1 of the present invention;

fig. 3 is a schematic front view of a scar loosening device for puncture points in embodiment 1 of the present invention;

fig. 4 is a schematic front view of a scar loosening device for puncture points in a first state according to embodiment 2 of the present invention;

fig. 5 is a schematic perspective view of a puncture point scar loosening device in a first state according to embodiment 2 of the present invention;

FIG. 6 is an enlarged partial schematic view of FIG. 5;

fig. 7 is a schematic front view of a scar loosening device for puncture points in a second state according to embodiment 2 of the present invention;

fig. 8 is a schematic perspective view of a scar loosening device for puncture points in a second state according to embodiment 2 of the present invention;

FIG. 9 is an enlarged partial schematic view of FIG. 8;

fig. 10 is an exploded schematic view of a puncture point scar loosening apparatus in a second state according to embodiment 2 of the present invention;

fig. 11 is a schematic view of the overall structure of the debonding needle body and the operation part in the scar debonding device for puncture points in embodiment 2 of the present invention;

fig. 12 is a schematic cross-sectional view of a loosening needle body and an operation part in a scar loosening device for puncture points according to embodiment 2 of the present invention;

fig. 13 is a schematic view of the overall structure of a blade pushing head in a scar loosening device for puncture points according to embodiment 2 of the present invention;

fig. 14 is a schematic sectional view of a blade pushing head in a scar loosening device for puncture points according to embodiment 2 of the present invention.

In the figure, 100, the needle body is loosened; 101. a release needle first end; 102. a release needle second end; 103. calibration; 110. a first cavity; 120. accommodating grooves; 121. a first limit piece; 122. a second limiting member; 130. a third cavity; 200. a blade; 201. a blade first end; 202. a blade second end; 210. a blade part; 211. a circular arc-shaped blade part; 300. an operation section; 301. an anti-slip structure; 302. an indicator; 310. a second cavity; 311. a first tapered port; 320. an internal thread; 400. a blade pushing rod; 401. a blade pushing rod first end; 402. a blade pushing rod second end; 500. a blade pushing head; 510. an annular groove; 520. a fourth cavity; 521. a second tapered port; 530. an external thread; 600. a fixing sheet; 700. and (4) screws.

Detailed Description

The embodiments of the present invention will be described in detail with reference to the accompanying drawings, and some structures are not shown in the drawings, which can be derived by those skilled in the art according to the present invention.

The utility model only elaborates the specifically improved parts, for example, the materials of each part can be made of medical materials available in the market as long as the materials meet the requirements of the utility model, so that the material is not limited specifically; other parts of the present invention that can be directly obtained by those skilled in the art according to the prior art are not specifically described herein.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

EXAMPLE 1 puncture site scar Release device

Fig. 1 is a schematic perspective structure diagram of a scar loosening device for puncture points in this embodiment, fig. 2 is a schematic sectional structure diagram of the scar loosening device for puncture points in this embodiment, and fig. 3 is a schematic front view of the scar loosening device for puncture points in this embodiment. As shown in fig. 1 to 3, the scar loosening device for puncture points in the present embodiment includes a loosening needle body 100, a blade 200, and an operating part 300; the first cavity 110 is arranged on the lytic needle body 100, the first cavity 110 penetrates through the lytic needle body 100 along the axial direction of the lytic needle body 100, the blade 200 is arranged on the outer wall of the lytic needle body 100 close to the first end 101 of the lytic needle, the blade 200 is fixedly arranged relative to the lytic needle, and the operating part 300 is connected with the second end 102 of the lytic needle; in use, the blade portion 210 of the blade 200 faces the release needle first end 101, and the release needle first lumen 110 is used to receive and guide a guidewire therethrough.

The scar loosening device for the puncture point in the embodiment is mainly applied to the situation that the puncture point has scars in the secondary interventional operation, in clinical use, a puncture blood vessel is generally searched by using a puncture needle, and if the insertion of an introducer sheath is difficult after a guide wire is inserted, the loosening device can be adopted; the guide wire is put into the first cavity 110 of the loosening device, then the blade part 210 of the blade 200 is slowly pushed in towards the proximal end of the body, and the scar is cut by the blade part 210 of the blade 200, so that the catheter sheath can smoothly enter; the puncture point scar loosening device in the embodiment can replace a conventional instrument (a scalpel, a tissue shear or a vascular clamp) to treat scars, so that the expansion of wounds or serious tissue damage is avoided, and the minimally invasive characteristic of an interventional operation is ensured.

As shown in FIG. 3, the angle between the extension line of the blade part 210 of the blade 200 and the extension line of the first end 101 of the release pin is α, which is 45 ° < α > or less than 90 °. Further preferably, alpha is more than or equal to 60 degrees and less than or equal to 80 degrees; more preferably, 70 DEG-75 DEG is selected. More specifically, α is defined, and generally, the guide wire and the puncture vessel have a certain included angle (for example, 45 ° to 60 °) on the axis, and when the release needle first end 101 is located at the front in use, it can be known from fig. 3 that the blade portion 210 of the blade 200 in the present embodiment is inclined forward, and the cutting effect of the blade portion 210 of the blade 200 on the scar is optimal within the angle range of the present embodiment.

Preferably, the present embodiment also specifically defines the size of the blade 200 therein, and specifically, the farthest distance between the point on the blade 200 and the outer wall of the debonding needle body 100 in the direction perpendicular to the axis of the debonding needle body 100 is 2mm to 5 mm. This arrangement effectively defines the height of the blade 200, which essentially defines the size of the blade 210. Such a height range may be suitable for the loosening of scars in general re-interventional procedures, and does not cause excessive damage to the human body. In a particular use, several types of loosening devices of different blade 200 sizes may be prepared, and the loosening device with the smaller blade 200 size may be used to loosen the scar and then gradually increase the height of the blade 200 during the surgical procedure, thereby finally achieving scar loosening.

As shown in fig. 1-3, the first end of the release pin body 100 in this embodiment is generally conical near the first end of the release pin body 100, and the first end of the release pin body 100 is an end surface with a small conical area. The first end of the release needle body 100 is tapered so that the first end of the release needle body 100 is sharper and thus has better piercing ability. Further preferably, the outer wall of the release needle body 100 is provided with a scale 103. The scale 103 may be provided to facilitate the user in determining the specific location of the scar.

In order to allow the guide wire to pass in and out of the loosening apparatus, a second lumen 310 penetrating the operation unit 300 is provided in the operation unit 300, and the first lumen 110 and the second lumen 310 are provided in a penetrating manner. Further, at the end of the operation portion 300 far from the release needle body 100, the second cavity 310 is a first tapered opening 311, and the larger end of the first tapered opening 311 is disposed at the outermost side of the operation portion 300, which is more convenient for the guide wire to enter the second cavity 310 and the first cavity 110.

Further, the operation part 300 has a cylindrical structure, and the second cavity 310 penetrates through two end surfaces of the cylindrical structure; an anti-slip structure 301 is provided on the outer circumferential surface of the cylindrical structure. Such an arrangement facilitates the performance of the scar loosening operation. It is further preferable that an indicator 302 is further disposed on the outer side surface of the operating portion 300, the indicator 302 is disposed parallel to the plane of the blade 200 and faces the same direction, and the indicator 302 is used for indicating the direction of the blade 200, so that when the blade 200 enters the scar position, the direction can be determined outside the body, thereby facilitating the operation.

EXAMPLE 2 scar Release device for puncture points

Fig. 4 is a schematic front view of the scar loosening device for puncture points in the present embodiment in a first state, fig. 5 is a schematic perspective view of the scar loosening device for puncture points in the present embodiment in the first state, and fig. 6 is an enlarged partial schematic view of fig. 5. Fig. 7 is a schematic front view of the puncture scar loosening apparatus in this embodiment in a second state; fig. 8 is a perspective view of the scar loosening device for puncture points in this embodiment in a second state; fig. 9 is a partially enlarged schematic view of fig. 8.

As shown in fig. 4 to 9, the puncture point scar loosening apparatus in this embodiment includes a loosening needle body 100, a blade 200, and a manipulation part 300; the first cavity 110 is arranged on the lytic needle body 100, the first cavity 110 penetrates through the lytic needle body 100 along the axial direction of the lytic needle body 100, the blade 200 is arranged on the outer wall of the lytic needle body 100 close to the first end 101 of the lytic needle, the blade 200 is rotatably arranged relative to the lytic needle, and the operating part 300 is connected with the second end 102 of the lytic needle; in use, the blade portion 210 of the blade 200 faces the release needle first end 101, and the release needle first lumen 110 is used to receive and guide a guidewire therethrough.

Preferably, similar to the embodiment 1, the angle between the extension line of the blade part 210 of the blade 200 and the extension line of the first end 101 of the release pin in the embodiment is α, and 45 ° ≦ α ≦ 90 °. Further preferably, alpha is more than or equal to 60 degrees and less than or equal to 80 degrees; more preferably, 70 DEG-75 DEG is selected. More specifically, α is defined, and generally, the guide wire and the puncture blood vessel have a certain included angle (for example, 45 ° to 60 °) on the axis, and when the release needle first end 101 is located at the front in use, it can be known from fig. 7 that the blade portion 210 of the blade 200 in the present embodiment is inclined forward, and the cutting effect of the blade portion 210 of the blade 200 on the scar is optimal within the angle range of the present embodiment.

The present embodiment also specifically defines the dimensions of the blade 200 therein, specifically the furthest distance between the point on the blade 200 and the outer wall of the debonder body 100 in a direction perpendicular to the axis of the debonder body 100 is 2mm to 5 mm. This arrangement effectively defines the height of the blade 200, which essentially defines the size of the blade 210. Such a height range may be suitable for the loosening of scars in general re-interventional procedures, and does not cause excessive damage to the human body. In a particular use, several types of loosening devices of different blade 200 sizes may be prepared, and the loosening device with the smaller blade 200 size may be used to loosen the scar and then gradually increase the height of the blade 200 during the surgical procedure, thereby finally achieving scar loosening.

Similar to embodiment 1, the first end of the release pin body 100 in this embodiment is tapered as a whole near the first end of the release pin body 100, and the first end of the release pin body 100 is an end surface with a smaller tapered area. The first end of the release needle body 100 is tapered so that the first end of the release needle body 100 is sharper and thus has better piercing ability. Further preferably, the outer wall of the release needle body 100 is provided with a scale 103. The scale 103 may be provided to facilitate the user in determining the specific location of the scar.

Specifically, in the present embodiment, the blade 200 is rotatably disposed relative to the release pin, and the outer wall of the release pin body 100 near the first end of the release pin body 100 is provided with a receiving groove 120; the blade 200 has two mutually switchable locking states, when the blade 200 is in the first state, the blade 200 is completely hidden in the accommodating groove 120, and the release device is in an unused state; when the blade 200 is in the second locked state, the blade 200 extends from the receiving slot 120, and the release mechanism is in use. The blade 200 is a rotatable structure, can adopt a first locking state when entering a human body, switches the blade 200 into a second locking state after reaching a scar position, and switches the blade 200 back to the first locking state after the scar is loosened to exit the human body; the arrangement is such that during the process of loosening the scar, the blade part 210 of the blade 200 only cuts the position of the scar, but does not cut other parts passing through the process of entering the human body, so that the trauma to the human body can be further reduced.

Fig. 6 is a partially enlarged view of fig. 5, and as shown in fig. 6, a first stopper 121 is disposed in the accommodating groove 120, and when in use, the first stopper 121 abuts against the blade portion 210 of the blade 200 to limit the inclination angle of the blade 200 toward the first end of the release pin body 100. The first limiting member 121 is disposed to limit the inclination angle of the blade 210 of the blade 200, so that the loosening device has a better cutting effect on the scar.

Preferably, as shown in fig. 6 and 9, the first stopper 121 in the present embodiment is a first stopper block, one surface of the first stopper block close to the blade 200 is a first stopper surface, an end of the blade 200 close to the first end of the release pin body 100 in the extending direction of the blade portion 210 is a first blade end 201, and the blade portion 210 of the blade 200 is an arc-shaped blade portion 211 blade portion 210 at a position close to the first blade end 201. The arc-shaped blade portion 211 and the blade portion 210 slide along the first limiting surface so that the blade 200 is switched from the first locking state to the second locking state more smoothly and conveniently.

Preferably, a second stopper 122 is further disposed at the first end of the release needle body 100, and the second stopper 122 abuts against a surface of the blade 200 opposite to the blade portion 210 during use, so as to limit an inclination angle of the blade 200 toward the second end of the release needle body 100. The second limiting member 122 prevents the blade 200 from tilting backwards, thereby ensuring the cutting effect.

Fig. 10 is an exploded schematic view of the puncture scar loosening apparatus in this embodiment, fig. 11 is an overall structural schematic view of a loosening needle body 100 and an operating part 300 in the puncture scar loosening apparatus in this embodiment, fig. 12 is a sectional structural schematic view of a loosening needle body 100 and an operating part 300 in the puncture scar loosening apparatus in this embodiment, as shown in fig. 10 to 12, the puncture scar loosening apparatus in this embodiment further includes a blade pushing rod 400, and a first end 401 of the blade pushing rod is hinged to a second end 202 of the blade; the third cavity 130 penetrating through the lytic needle body 100 is arranged on the lytic needle body 100, the extending direction of the third cavity 130 is parallel to the extending direction of the first cavity 110, the second end 402 of the blade push rod extends out of the third cavity 130, and the blade push rod 400 reciprocates in the third cavity 130 by pushing the second end 402 of the blade push rod. In this arrangement, the arrangement of the blade push rod 400 is simple in structure and strong in operability.

Preferably, the puncture point scar loosening apparatus in this embodiment further includes a blade pushing head 500, fig. 13 is a schematic view of the overall structure of the blade pushing head 500 in the puncture point scar loosening apparatus in this embodiment, and fig. 14 is a schematic view of the sectional structure of the blade pushing head 500 in the puncture point scar loosening apparatus in this embodiment. The blade pushing head 500 is connected with the second end 402 of the blade pushing rod, the blade pushing head 500 is connected with the operating part 300 through a thread structure, the thread structure extends along the axial direction of the release needle body 100, and when the blade pushing head 500 is rotated to enable the blade pushing head 500 to reciprocate relative to the operating part 300 along the axial direction of the release needle body 100. The arrangement of the bit pushing head facilitates the switching of the blade 200 between the first locking state and the second locking state; and meanwhile, the thread structure can limit and lock the position of the blade 200.

Similarly to embodiment 1, the operation portion 300 in the present embodiment is also a cylindrical structure, and an anti-slip structure 301 is provided on the outer peripheral surface of the cylindrical structure. Such an arrangement facilitates the performance of the scar loosening operation. It is further preferable that an indicator 302 is further disposed on the outer side surface of the operating portion 300, the indicator 302 is disposed parallel to the plane of the blade 200 and faces the same direction, and the indicator 302 is used for indicating the direction of the blade 200, so that when the blade 200 enters the scar position, the direction can be determined outside the body, thereby facilitating the operation.

Except that the operating part 300 in this embodiment is provided with a cylindrical cavity having an internal thread 320 at an end thereof away from the release needle body 100, the blade pushing head 500 is formed in a cylindrical structure as a whole, and is provided with an external thread 530 on an outer circumferential wall thereof to be engaged with the internal thread 320. Preferably, the second lumen 310 on the blade pusher head 500 is in communication with the first lumen 110, thereby allowing passage of a guidewire. Wherein the third cavity 130 extends onto the operating part 300 and through the operating part 300, thereby facilitating the connection of the blade push rod 400 and the blade push head 500.

Preferably, the blade pushing rod 400 is a cylindrical structure as a whole, and the diameter of the cross section of the second end 402 of the blade pushing rod is larger than the cross section of the middle part of the blade pushing rod 400; an annular recess 510 is provided in the blade pusher head 500 for receiving the second end 402 of the blade pusher rod; the blade-pushing rod second end 402 can rotate along the annular groove 510 but cannot escape from the annular groove 510, and therefore a fixing piece 600 for restraining the blade-pushing rod second end 402 in the annular groove 510 is also provided. Preferably, the fixing plate 600 is detachably coupled to the blade pushing bar 400, and may be fixed using, for example, a screw 700.

Preferably, the blade pushing head 500 of the present embodiment is provided with a fourth cavity 520 penetrating through the blade pushing head 500, and when in use, the fourth cavity 520 is communicated with the second cavity 310 and the first cavity 110 to allow a guide wire to pass through. At the end of the blade pushing head 500 far away from the operation part 300, the fourth cavity 520 is a second tapered opening 521, and the larger end of the second tapered opening 521 is disposed at the outermost side of the blade pushing head 500, which is more convenient for the guide wire to enter the fourth cavity 520 and then enter the second cavity 310 and the first cavity 110 in sequence.

The above description of the embodiments is only intended to illustrate the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several modifications can be made to the present invention, and these modifications will fall within the protection scope of the claims of the present invention.

Claims (10)

1. A puncture point scar loosening device is characterized by comprising a loosening needle body, a blade and an operating part; the needle loosening body is provided with a first cavity, the first cavity penetrates through the needle loosening body along the axial direction of the needle loosening body, the blade is arranged on the outer wall, close to the first end of the needle loosening body, the blade is fixedly arranged or rotatably arranged relative to the needle loosening body, the operating part is connected with the second end of the needle loosening body, the operating part is provided with a second cavity penetrating through the operating part, and the first cavity and the second cavity are arranged in a penetrating mode; when in use, the blade part of the blade faces the first end of the release needle, and the first cavity of the release needle is used for accommodating a guide wire and guiding the guide wire to pass through.

2. The scar loosening device for puncture points according to claim 1, wherein the angle between the extension line of the blade part of the blade and the extension line of the first end of the loosening needle has an angle value of α, 45 ° or more and 90 ° or less.

3. The puncture scar loosening device of claim 1 wherein the furthest distance from the point on the blade to the outer wall of the debonding needle body in a direction perpendicular to the axis of the debonding needle body is between 2mm and 5 mm.

4. The puncture scar loosening device of claim 1 wherein the first end of the debonding needle body, which is adjacent to the first end of the debonding needle body, is generally conical and has a smaller conical area.

5. The puncture scar loosening device of claim 1, wherein the blade is fixedly arranged in a rotatable manner relative to the loosening needle, and a receiving groove is formed in the outer wall of the loosening needle body near the first end of the loosening needle body; the blade has two mutually switchable locking states, when the blade is in a first state, the blade is completely hidden into the accommodating groove, and the release device is in an unused state; when the blade is in the second locking state, the blade extends out of the accommodating groove, and the loosening device is in a use state.

6. A puncture scar loosening device as claimed in claim 5, wherein a first stop member is provided in the receiving groove, the first stop member abutting the blade portion of the blade in use to limit the angle of inclination of the blade toward the first end of the loosening needle body.

7. The scar loosening device for puncture points according to claim 6, wherein the first limiting member is a first limiting block, one surface of the first limiting block, which is close to the blade, is a first limiting surface, the end of the blade, which is close to the first end of the loosening needle body in the extending direction of the blade portion, is a first end of the blade, and the blade portion of the blade is an arc-shaped blade portion at a position close to the first end of the blade.

8. The scar loosening device for puncture points according to claim 5, wherein a second limiting member is further provided at the first end of the loosening needle body, and the second limiting member abuts against a surface of the blade opposite to the blade portion in use, so as to limit an inclination angle of the blade toward the second end of the loosening needle body.

9. The puncture scar loosening apparatus of claim 7 further comprising a blade pusher arm, wherein a first end of the blade pusher arm is hinged to a second end of the blade; the utility model discloses a set up the cutter blade catch bar, including the release needle body, be provided with on the release needle body and run through the third cavity of release needle body, the extending direction of third cavity with the extending direction of first cavity is parallel, blade catch bar second end by the third cavity stretches out, makes through promoting blade catch bar second end blade catch bar reciprocating motion in the third cavity.

10. The puncture scar loosening device of claim 9 further comprising a blade pushing head connected to the second end of the blade pushing rod, wherein the blade pushing head is connected to the operating portion by a threaded structure extending in the axial direction of the loosening needle body, and wherein, in use, the blade pushing head is rotated to reciprocate relative to the operating portion in the axial direction of the loosening needle body.

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