阅读说明：本技术 一种可拆卸的经皮穿刺定位工具 (Detachable percutaneous puncture positioning tool ) 是由 薛静波 邓展文 彭文 玉培良 周邦桦 梁灵光 于 2021-08-13 设计创作，主要内容包括：本发明公开一种可拆卸的经皮穿刺定位工具,其包括：穿刺套管,其具有轴线沿上下延伸的第一通孔且上端面设有卡挡部,卡挡部上端面设有卡接部,卡接部设有轴线沿上下延伸且与第一通孔连通的连接孔；穿刺针,其上端面设有与连接孔可拆连接的连接部,连接部上端面设有端头；手柄,其包括杆部,杆部设有轴向垂直于杆部长度方向的卡接孔,卡接孔与卡接部适配连接且可拆。通过卡接孔套入卡接部,实现手柄与穿刺套管可拆连接,锤击手柄时,卡挡部会对杆部产生阻力,避免手柄相对穿刺套管下移,且能将手柄所受到的作用力传递至穿刺套管,有利于驱使穿刺套管和穿刺针深深伸入椎弓根内部。在进行X线透视前拆除手柄,避免射线被遮挡或穿刺定位工具掉落。(The invention discloses a detachable percutaneous puncture positioning tool, which comprises: the puncture cannula is provided with a first through hole of which the axis extends up and down, the upper end surface of the puncture cannula is provided with a blocking part, the upper end surface of the blocking part is provided with a clamping part, and the clamping part is provided with a connecting hole of which the axis extends up and down and is communicated with the first through hole; the upper end surface of the puncture needle is provided with a connecting part which is detachably connected with the connecting hole, and the upper end surface of the connecting part is provided with an end head; the handle, it includes pole portion, and pole portion is equipped with the joint hole of axial perpendicular to pole portion length direction, and the joint hole is connected just removable with joint portion adaptation. Embolia joint portion through the joint hole, realize handle and puncture sleeve pipe releasable connection, during the hammering handle, the card fender portion can produce the resistance to pole portion, avoids the relative puncture sleeve pipe of handle to move down, and can transmit the effort that the handle received to the puncture sleeve pipe, is favorable to ordering about puncture sleeve pipe and pjncture needle and stretches into the pedicle of vertebral arch deeply inside. The handle is removed before X-ray fluoroscopy is carried out, so that rays are prevented from being shielded or the puncture positioning tool is prevented from falling off.)

1. A detachable percutaneous puncture positioning tool, comprising:

the puncture cannula (100) is provided with a first through hole (160), the axis of the first through hole (160) extends up and down, the upper end face of the puncture cannula (100) is provided with a blocking part (150), the upper end face of the blocking part (150) is provided with a clamping part (110), the clamping part (110) is provided with a connecting hole (140), the axis of the connecting hole (140) extends up and down, and the connecting hole (140) is communicated with the first through hole (160);

the upper end face of the puncture needle (200) is provided with a connecting part (210), the connecting part (210) is detachably connected with the connecting hole (140), and the upper end face of the connecting part (210) is provided with a tip (220);

handle (300), it includes pole portion (310), pole portion (310) is equipped with joint hole (311), the axial perpendicular to pole portion's (310) length direction in joint hole (311), joint hole (311) and joint portion (110) adaptation connection and removable.

2. The detachable percutaneous penetration positioning tool according to claim 1, wherein the connecting portion (210) is a threaded portion and the connecting hole (140) is a threaded hole.

3. The detachable percutaneous puncture positioning tool of claim 2, wherein the tip (220) is a metal piece and the handle (300) is a metal piece.

4. A detachable percutaneous penetration positioning tool according to claim 3, wherein the tip (220), the connecting portion (210) and the penetrating needle (200) are integrally formed.

5. The detachable percutaneous puncture positioning tool according to any one of claims 1 to 4, wherein the upper end surface of the clamping portion (110) is provided with a limiting portion (130), the direction perpendicular to the length direction of the puncture cannula (100) is a radial direction, and the joint of the limiting portion (130) and the clamping portion (110) is radially recessed to form a recess (120); the rod part (310) is provided with a second through hole (312), the second through hole (312) is communicated with the clamping hole (311), and the axial direction of the second through hole (312) is consistent with the length direction of the rod part (310); the handle (300) further comprises:

the moving rod is arranged in the second through hole (312) and can slide along the length direction of the rod part (310), one end of the moving rod is positioned outside the second through hole (312), the moving rod is provided with a third through hole (341), the axial direction of the third through hole (341) is consistent with the axial direction of the clamping hole (311), the concave part (120) is positioned on one side of the puncture sleeve (100) far away from one end of the moving rod and penetrates through the third through hole (341), the moving rod is connected with the concave part (120) in a buckling mode, and the buckling connection is detachable;

and one end of the elastic piece is connected with the rod part (310), and the other end of the elastic piece is connected with the movable rod.

6. The detachable percutaneous puncture positioning tool according to claim 5, wherein the moving rod is provided with a waist-shaped limiting hole (321), the axial direction of the waist-shaped limiting hole (321) is perpendicular to the length direction of the moving rod, and two ends of the waist-shaped limiting hole (321) extend along the length direction of the moving rod; the handle (300) further comprises a pin (330); two ends of the pin shaft (330) are respectively connected with the rod part (310), and the pin shaft (330) penetrates through the limiting waist-shaped hole (321).

7. The detachable percutaneous puncture positioning tool according to claim 5, wherein the elastic member is a spring (360), the spring (360) is disposed in the second through hole (312), one end of the spring (360) is connected to the rod portion (310), and the other end is connected to the other end of the movable rod.

8. The detachable percutaneous puncture positioning tool according to claim 5, wherein the third through hole (341) is a kidney-shaped hole, the recess (120) is cylindrical, the inner wall surface of the third through hole (341) completely fits the outer wall surface of the recess (120), and the movable rod is clamped between the limiting portion (130) and the clamping portion (110).

9. The detachable percutaneous puncture positioning tool according to claim 6, wherein the movable rod comprises a first cylindrical portion (320), a square portion (340) and a second cylindrical portion (350), the first cylindrical portion (320), the square portion (340) and the second cylindrical portion (350) are sequentially connected, a central axis of the first cylindrical portion (320), a central axis of the square portion (340) and a central axis of the second cylindrical portion (350) are coincident, the square portion (340) is provided with the third through hole (341), the first cylindrical portion (320) is provided with the limiting waist-shaped hole (321), and an axial direction of the third through hole (341) is consistent with an axial direction of the limiting waist-shaped hole (321).

10. The detachable percutaneous puncture positioning tool according to claim 9, wherein the inner wall surface of the second through hole (312) is recessed along a direction perpendicular to the axial direction of the pin (330) to form a positioning groove, the positioning groove extends from the open end of the second through hole (312) along the length direction of the rod portion (310), the square portion (340) is adapted to be connected with the positioning groove, and the rod portion (310) is provided with a shaft hole (313) for inserting the pin (330).

Technical Field

The invention relates to the technical field of medical instruments, in particular to a detachable percutaneous puncture positioning tool.

Background

The key of the posterior percutaneous minimally invasive internal fixation operation of the spine is to complete the positioning of the vertebral pedicle and the puncture guidance of the vertebral pedicle screw under percutaneous conditions in the operation. At present, the basic structure of the existing percutaneous pedicle puncture positioning tool is that a T-shaped hollow handle is attached with a puncture guide needle, and as the puncture positioning tool needs to carry out high-temperature sterilization on the main body before clinical use and needs to puncture by hammering the T-shaped hollow handle in the use process, the traditional puncture positioning tool adopts metal materials, has better durability and can be sterilized at high temperature; however, since the metal material is heavy and opaque to the radiation, the metal T-handle blocks the radiation during the intraoperative fluoroscopy to affect the observation, and there is a risk that the tool is accidentally dropped.

Based on this, through the optimization to traditional puncture positioning tool, the hollow handle of T type in the novel puncture positioning tool has adopted materials such as high temperature resistant polymer plastics, has solved the unable high temperature resistant of ordinary plastics and the unable problem that sees through the ray of metal, nevertheless, still can' T solve the poor and tool material cost of durability of repeated hammering and increase the problem.

Disclosure of Invention

The present invention is directed to a detachable percutaneous puncture positioning tool that solves one or more of the problems set forth in the prior art and provides at least one of the advantages of the present invention.

The technical scheme adopted for solving the technical problems is as follows:

the invention provides a detachable percutaneous puncture positioning tool, which comprises:

the puncture cannula is provided with a first through hole, the axis of the first through hole extends up and down, the upper end surface of the puncture cannula is provided with a blocking part, the upper end surface of the blocking part is provided with a clamping part, the clamping part is provided with a connecting hole, the axis of the connecting hole extends up and down, and the connecting hole is communicated with the first through hole;

the upper end surface of the puncture needle is provided with a connecting part, the connecting part is detachably connected with the connecting hole, and the upper end surface of the connecting part is provided with an end head;

the handle, it includes pole portion, pole portion is equipped with the joint hole, the axial perpendicular to length direction in pole portion in joint hole, joint hole and joint portion adaptation connection and removable.

The invention has at least the following beneficial effects: the puncture cannula is provided with a first through hole extending up and down, so that the puncture needle can be conveniently inserted; puncture sheathed tube up end sets up card fender portion, the up end of card fender portion sets up joint portion, pole portion sets up the joint hole, embolia joint portion through the joint hole, realize handle and puncture sheathed tube releasable connection, when applying the hammering effect to the handle, the resistance can be applyed to pole portion to card fender portion, move down in order to avoid the relative puncture sleeve pipe of handle, and can transmit the hammering power that the handle received to the puncture sleeve pipe, be favorable to ordering about puncture sleeve pipe and puncture needle and stretch into the pedicle of vertebral arch deeply inside, and simultaneously, because the joint is used, can prevent that hammering in-process handle from puncturing the sleeve pipe relatively and rotating. Moreover, joint portion sets up the connecting hole with first through-hole, and the up end of pjncture needle is equipped with connecting portion, through connecting portion and connecting hole releasable connection, makes pjncture needle and puncture sleeve pipe fixed mutually, and the up end of connecting portion sets up the end, conveniently exerts the hammering effort to the end, fixes puncture sleeve pipe and pjncture needle at the pedicle of vertebral arch, accomplishes preliminary location, rotates the end moreover, alright relieve the connection of connecting portion and connecting hole fast, conveniently puts the nail guide pin and inserts first through-hole. Before X ray perspective, through dismantling the handle, avoid appearing the condition such as ray is sheltered from, puncture positioning tool drops by the handle.

As a further improvement of the above technical solution, the connecting portion is a threaded portion, and the connecting hole is a screw hole. Connecting portion adopt screw portion design, and the connecting hole adopts the screw design, and easily processing is convenient to be dismantled the pjncture needle from puncture cannula, moreover, increases pjncture needle and puncture cannula's area of contact, strengthens pjncture needle and puncture cannula's linkage effect, and difficult pine takes off, can bear great hammering effort.

As a further improvement of the technical scheme, the end head is a metal piece, and the handle is a metal piece. The end and the handle are made of metal materials, and can bear large repeated hammering action.

As a further improvement of the technical scheme, the end head, the connecting part and the puncture needle are integrally formed. The end head, the connecting part and the puncture needle are manufactured by adopting an integral forming process, so that the connecting strength among the end head, the connecting part and the puncture needle can be enhanced, and the end head, the connecting part and the puncture needle are prevented from being broken in the puncture process.

As a further improvement of the above technical scheme, the upper end face of the clamping portion is provided with a limiting portion, the direction perpendicular to the length direction of the puncture sleeve is taken as the radial direction, and the joint of the limiting portion and the clamping portion is recessed along the radial direction to form a concave portion; the rod part is provided with a second through hole, the second through hole is communicated with the clamping hole, and the axial direction of the second through hole is consistent with the length direction of the rod part; the handle further comprises: the moving rod is arranged in the second through hole and can slide along the length direction of the rod part, one end of the moving rod is positioned outside the second through hole, the moving rod is provided with a third through hole, the axial direction of the third through hole is consistent with the axial direction of the clamping hole, the concave part is positioned on one side of the puncture sleeve pipe, which is far away from one end of the moving rod, and penetrates through the third through hole, the moving rod is connected with the concave part in a buckling mode, and the buckling connection is detachable; and one end of the elastic piece is connected with the rod part, and the other end of the elastic piece is connected with the moving rod.

The rod part is provided with a second through hole communicated with the clamping hole, the axial direction of the second through hole is consistent with the length direction of the rod part, so that the movable rod can be inserted into the second through hole and can slide relative to the rod part, the movable rod is provided with a third through hole, the axial direction of the third through hole is consistent with the axial direction of the clamping hole, and the clamping part is conveniently connected with the clamping hole; the upper end of the clamping portion is provided with a limiting portion, a concave portion is arranged at the connecting portion of the limiting portion and the clamping portion, the concave portion is located on one side, away from one end of the moving rod, of the puncture sleeve, meanwhile, one end of the elastic piece is connected with the rod portion, the other end of the elastic piece is connected with the moving rod, acting force is applied to the moving rod by the elastic piece, one end of the moving rod is driven to move back to the puncture sleeve, the moving rod is driven to be connected with the concave portion in a buckling mode, the connecting effect between the handle and the puncture sleeve is enhanced, and the puncture sleeve can be conveniently separated from the interior of the vertebral pedicle through force application to the handle; force is applied to one end of the moving rod to drive one end of the moving rod to move towards the puncture cannula, and the buckling effect between the moving rod and the concave part is released, so that the handle is separated from the puncture cannula.

As a further improvement of the above technical scheme, the moving rod is provided with a limiting waist-shaped hole, the axial direction of the limiting waist-shaped hole is perpendicular to the length direction of the moving rod, and two ends of the limiting waist-shaped hole extend along the length direction of the moving rod; the handle further comprises a pin shaft; the two ends of the pin shaft are respectively connected with the rod part, and the pin shaft penetrates through the limiting waist-shaped hole. The pole portion sets up the round pin axle, wears to locate the spacing waist type hole of carriage release lever through the round pin axle, and the round pin axle carries on spacingly to the carriage release lever, strengthens the linkage effect between carriage release lever and the pole portion, avoids the carriage release lever to separate with pole portion easily when sliding along pole portion length direction.

As a further improvement of the above technical solution, the elastic member is a spring, the spring is disposed in the second through hole, one end of the spring is connected to the rod portion, and the other end of the spring is connected to the other end of the movable rod. The elastic piece adopts the spring, has great elastic deformation ability, long service life, can arrange the spring in the second through-hole, makes the one end of spring and the internal face of second through-hole be connected, and the other end is connected with the other end of carriage release lever, can reduce the equipment degree of difficulty of handle.

As a further improvement of the above technical solution, the third through hole is a kidney-shaped hole, the concave portion is cylindrical, the inner wall surface of the third through hole is completely attached to the outer wall surface of the concave portion, and the moving rod is clamped between the limiting portion and the clamping portion. The third through-hole adopts the design of waist type hole, the concave part adopts cylindric design, processing is simple, moreover, when carriage release lever and concave part produce the buckle effect, the internal face ability of third through-hole and the outer wall of concave part laminate completely, and simultaneously, the carriage release lever card is between spacing portion and joint portion, area of contact between ability increase carriage release lever and the puncture sleeve pipe, thereby strengthen the connection effect between handle and the puncture sleeve pipe, prevent that the handle can rock from top to bottom relative puncture sleeve pipe, when the hammering handle, the transmission of effect can high-efficiently be accomplished, make puncture sleeve pipe and pjncture needle can stabilize the depth smoothly and insert inside the pedicle of vertebral arch.

As a further improvement of the above technical solution, the moving rod includes a first cylindrical portion, a square portion and a second cylindrical portion, the first cylindrical portion, the square portion and the second cylindrical portion are sequentially connected, a central axis of the first cylindrical portion, a central axis of the square portion and a central axis of the second cylindrical portion coincide, the square portion is provided with the third through hole, the first cylindrical portion is provided with the limit waist-shaped hole, and an axial direction of the third through hole is consistent with an axial direction of the limit waist-shaped hole. The first cylindrical part, the square part and the second cylindrical part are sequentially connected to form the moving rod, so that the moving rod has the advantages of simple structure and easiness in manufacturing.

As a further improvement of the above technical solution, an inner wall surface of the second through hole is recessed along a direction perpendicular to an axial direction of the pin shaft to form a positioning groove, the positioning groove extends from an opening end of the second through hole along a length direction of the rod portion, the block portion is connected with the positioning groove in an adaptive manner, and the rod portion is provided with a shaft hole for the pin shaft to be inserted into. The movable rod is arranged in the second through hole, the movable rod adopts a first cylindrical part and a second cylindrical part, and the inner peripheral wall surface of the second through hole is attached to the outer peripheral wall surface of one or two of the first cylindrical part and the second cylindrical part, so that the movable rod slides back and forth along the rod part without shaking; and, set up the constant head tank, make when the carriage release lever is installed in pole portion, the constant head tank can exert the positioning action, avoids the relative pole portion of carriage release lever to rotate, makes the shaft hole align with spacing waist type pore pair to reduce the installation degree of difficulty of round pin axle.

Drawings

The invention is further described with reference to the accompanying drawings and examples;

FIG. 1 is a perspective view of one embodiment of a detachable percutaneous puncture positioning tool provided by the present invention;

FIG. 2 is a perspective view of the configuration of the puncture cannula provided by the present invention;

FIG. 3 is a schematic view of the internal structure of the puncture cannula provided in the present invention;

FIG. 4 is a perspective view of the structure of the needle provided by the present invention;

FIG. 5 is a perspective view of the handle construction provided by the present invention;

FIG. 6 is an exploded view of the handle construction provided by the present invention;

FIG. 7 is a schematic view of the internal structure of the handle provided by the present invention;

FIG. 8 is a schematic view of the puncture cannula and needle provided in accordance with the present invention;

figure 9 is a schematic view of a detachable percutaneous puncture positioning tool provided by the present invention in cooperation with a pin placing guide needle.

The drawings are numbered as follows: 100. puncturing a cannula; 110. a clamping part; 120. a recess; 130. a limiting part; 140. connecting holes; 150. a blocking part; 160. a first through hole; 200. puncturing needle; 210. a connecting portion; 220. a tip; 300. a handle; 310. a rod portion; 311. a clamping hole; 312. a second through hole; 313. a shaft hole; 320. a first cylindrical portion; 321. limiting waist-shaped holes; 330. a pin shaft; 340. a block section; 341. a third through hole; 350. a second cylindrical portion; 360. a spring; 400. placing a nail and guiding a needle; 500. the spine.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if words such as "a plurality" are described, it means one or more, a plurality is two or more, more than, less than, more than, etc. are understood as not including the present number, and more than, less than, etc. are understood as including the present number. If any description to first, second and third is only for the purpose of distinguishing technical features, it is not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

It should be noted that the direction X in the drawings is from the rear side to the front side of the detachable percutaneous puncture positioning tool; the Y direction is from the left side to the right side of the detachable percutaneous puncture positioning tool; the Z direction is from the lower side of the detachable percutaneous puncture positioning tool to the upper side.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1-9, several embodiments of the detachable percutaneous penetration positioning tool of the present invention are described below.

As shown in fig. 1 to 5, an embodiment of the present invention provides a detachable positioning tool for percutaneous puncture, including: a puncture cannula 100, a puncture needle 200, and a handle 300.

The puncture cannula 100 has a first through hole 160, an axis of the first through hole 160 extends up and down, specifically, the first through hole 160 extends from a lower end to an upper end of the puncture cannula 100, and a shape of the first through hole 160 is designed according to shapes of the puncture needle 200 and the pin guide 400, so that the puncture needle 200 and the pin guide 400 can be conveniently inserted into the first through hole 160. To better extend into the pedicle, the lower end surface of the puncture cannula 100 is typically beveled (i.e., the lower end surface is angled with respect to the length of the puncture cannula 100), as shown in FIG. 3.

The upper end surface of the puncture cannula 100 is provided with a blocking portion 150, the upper end surface of the blocking portion 150 is provided with a clamping portion 110, and in this embodiment, the clamping portion 110, the blocking portion 150 and the puncture cannula 100 are integrally formed. The clamping portion 110 is provided with a connecting hole 140, an axis of the connecting hole 140 extends up and down, and the connecting hole 140 is communicated with the first through hole 160, so that the lower end of the puncture needle 200 can pass through the connecting hole 140 and the first through hole 160 in sequence.

In the present embodiment, the puncture cannula 100 has a thin lower end and a thick upper end, so that the puncture can be positioned without using the handle 300 during the puncture operation, and the operator can conveniently hold and position the puncture cannula during the operation.

The upper end surface of the puncture needle 200 is provided with a connecting part 210, the connecting part 210 is detachably connected with the connecting hole 140, and the upper end surface of the connecting part 210 is provided with a tip 220. In this embodiment, the tip 220 is a metal member capable of bearing a large repeated hammering action, the tip 220 is cylindrical, and the tip 220, the connecting portion 210 and the puncture needle 200 are integrally formed; of course, it is not excluded that the connection between the tip 220, the connecting portion 210 and the puncture needle 200 is made by bolts, and that the tip 220 has a square block shape or other shapes.

The connecting portion 210 is a threaded portion, the connecting hole 140 is a threaded hole, and after the lower end of the puncture needle 200 sequentially passes through the connecting hole 140 and the first through hole 160, the end head 220 is acted by force to drive the puncture needle 200 to rotate along the axis of the puncture needle, so that the connecting portion 210 is screwed into the connecting hole 140, the puncture cannula 100 and the puncture needle 200 are fixed, and a puncture kit is formed.

Of course, it is not excluded that the puncture cannula 100 and the puncture needle 200 are made of high temperature-resistant polymer plastics or other materials.

In addition, the peripheral wall surface of the tip 220 can be provided with anti-slip teeth, so that the friction coefficient of the peripheral wall surface of the tip 220 is increased, and an operator can more easily screw the tip 220; of course, it is not excluded to provide the upper end face of the head 220 with an inner angle hole, and to screw the head 220 with an inner angle wrench.

In addition, the connection portion 210 may be provided with a locking protrusion, the connection hole 140 is a locking hole, and the locking protrusion and the locking hole are fastened by rotating the puncture needle 200, so that the puncture needle 200 and the puncture cannula 100 can be detachably connected.

To better extend into the pedicle, the lower end surface of the needle 200 is typically beveled (i.e., the lower end surface is angled with respect to the length of the needle 200), as shown in FIG. 4.

The handle 300 includes a rod portion 310, the rod portion 310 may be a solid long rod with a square cross section, the rod portion 310 is provided with a clamping hole 311, an axial direction of the clamping hole 311 is perpendicular to a length direction of the rod portion 310, in this embodiment, two ends of the rod portion 310 extend in a front-back direction, and an axis of the clamping hole 311 extends in an up-down direction, as shown in fig. 5. The handle 300 is a metal piece and can bear a large repeated hammering action. Of course, it is not excluded that the handle 300 is made of other materials and can withstand a large hammering force.

The clamping hole 311 is detachably connected with the clamping portion 110 in an adaptive mode, the shape of the clamping hole 311 is matched with that of the clamping portion 110, and after the clamping portion 110 is inserted into the clamping hole 311, the rod portion 310 is clamped with the puncture sleeve 100 and cannot rotate relative to the puncture sleeve 100. The clamping hole 311 may be, but not limited to, a square hole, a hexagonal hole, etc., in this embodiment, the clamping hole 311 is a square hole, and the inner angle is designed by an arc transition, and the clamping hole 311 is located in the middle of the rod portion 310.

In the detachable percutaneous puncture positioning tool provided by the embodiment, the clamping portion 110 is sleeved in the clamping hole 311, so that the handle 300 is detachably connected with the puncture cannula 100; when the handle 300 is hammered, the blocking part 150 applies resistance to the rod part 310 to prevent the handle 300 from moving downwards relative to the puncture cannula 100, and can transmit the hammering force received by the handle 300 to the puncture cannula 100, which is beneficial for driving the puncture cannula 100 to take the puncture needle 200 to deeply extend into the pedicle of vertebral arch, and meanwhile, because the blocking part 110 generates blocking action on the rod part 310 after being inserted into the blocking hole 311, the handle 300 can be prevented from rotating relative to the puncture cannula 100 in the hammering process, and the stability of the puncture positioning tool is improved.

Moreover, when the preliminary positioning work is carried out, the puncture needle 200 is firstly inserted into the connection hole 140 through the connection part 210, so that the puncture needle is fixed with the puncture cannula 100; then, applying hammering acting force to the end head 220 to fix the puncture cannula 100 and the puncture needle 200 on the pedicle of vertebral arch; furthermore, the tip 220 can be screwed to rotate the puncture needle 200 around the axis thereof, so that the connection between the connection portion 210 and the connection hole 140 can be released, and the insertion of the pin-placing guide needle 400 into the first through hole 160 of the puncture cannula 100 is facilitated. Before carrying out X ray perspective, through dismantling handle 300, avoid appearing the condition such as ray is sheltered from, puncture positioning tool drops.

In addition, as shown in fig. 1 to 3 and 5 to 7, a second embodiment of the present invention provides a detachable positioning tool for percutaneous puncture, which is different from the first embodiment in that: the upper end surface of the clamping portion 110 is provided with a limiting portion 130, and the limiting portion 130 and the clamping portion 110 are integrally formed. The connection position of the limiting portion 130 and the clamping portion 110 is recessed along the radial direction to form a recess 120, wherein the direction perpendicular to the length direction of the puncture cannula 100 is the radial direction.

The rod portion 310 is provided with a second through hole 312, the second through hole 312 is communicated with the clamping hole 311, the axial direction of the second through hole 312 is consistent with the length direction of the rod portion 310, one end of the second through hole 312 is an open end, the other end of the second through hole 312 is a closed end, and in this embodiment, the rear end face of the rod portion 310 is recessed to form the second through hole 312.

Also, the handle 300 further includes a moving bar and an elastic member.

The movable rod is disposed in the second through hole 312 and can slide along the length direction (i.e. the front-back direction in this embodiment) of the rod portion 310, and one end of the movable rod is located outside the second through hole 312, so as to apply pressure to one end of the movable rod, so that the movable rod is retracted into the second through hole 312. In the present embodiment, after the travel bar is mounted to the second through hole 312 of the rod portion 310, the rear end portion of the travel bar protrudes from the second through hole 312.

The movable rod is provided with a third through hole 341, the axial direction of the third through hole 341 is consistent with the axial direction of the clamping hole 311, and in this embodiment, the axial lines of the third through hole 341 and the clamping hole 311 both extend up and down.

One end of the elastic member is connected to the rod part 310 and the other end is connected to the moving rod. In this embodiment, the elastic member can apply a backward force to the moving rod, and after the pressure on the rear end portion of the moving rod is removed, the moving rod moves backward due to the force of the elastic member, and the automatic reset is completed.

Preferably, the elastic member is a spring 360, the spring 360 is disposed in the second through hole 312, one end of the spring 360 and the rod portion 310 can be connected in a welding mode or a clamping mode, and the other end of the spring and the other end of the moving rod can be connected in a welding mode or a clamping mode. Besides, the elastic piece can also be an elastic piece.

After the handle 300 is installed on the puncture cannula 100, the clamping portion 110 is just inserted into the clamping hole 311, at this time, the concave portion 120 is located on one side of the puncture cannula 100 far away from one end of the moving rod, in this embodiment, the concave portion 120 is located on the front side of the puncture cannula 100, the moving rod is in snap connection with the concave portion 120 under the action of the elastic member, the handle 300 is prevented from being separated from the handle 300 when the handle 300 receives upward acting force, and therefore an operator can conveniently hold the handle 300 to take out the puncture cannula 100 from the pedicle of vertebral arch. The snap connection is detachable, and specifically, the inner wall surface of the third through hole 341 is separated from the concave portion 120 by pressing the rear end of the moving rod.

In this embodiment, the third through hole 341 is a kidney-shaped hole, as shown in fig. 6 and 7. The concave portion 120 is cylindrical, that is, the concave portions 120 are continuously distributed along the circumferential direction of the joint of the clamping portion 110 and the limiting portion 130, so as to form a cylinder, as shown in fig. 2. The internal face of third through-hole 341 and the outer wall of concave part 120 laminate completely, and the carriage release lever joint is between spacing portion 130 and joint portion 110, therefore, can increase the area of contact between carriage release lever and the puncture sleeve 100, and make handle 300 receive the card shelves effect of spacing portion 130 and joint portion 110, thereby strengthen the connection effect between handle 300 and the puncture sleeve 100, prevent that handle 300 can rock from top to bottom relative puncture sleeve 100, be favorable to when hammering handle 300, can high-efficiently accomplish the transmission of effort, make puncture sleeve 100 and pjncture needle 200 can stabilize the depth smoothly and stretch into inside the pedicle of vertebral arch.

The shape of the position-limiting portion 130 may be the same as that of the clamping portion 110, as long as the shape can cooperate with the concave portion 120 and the clamping portion 110 to generate a buckling effect on the moving rod.

It is not excluded that the recess 120 is a groove, and the inner wall surface of the third through hole 341 is protruded to form a protrusion, and the protrusion is inserted into the groove, thereby realizing the snap-fit connection of the moving lever and the puncture cannula 100.

Further, the movable rod is provided with a limiting waist-shaped hole 321, an axial direction of the limiting waist-shaped hole 321 is perpendicular to a length direction of the movable rod, in this embodiment, the length direction of the movable rod is consistent with the X direction, and the axial direction of the limiting waist-shaped hole 321 is consistent with the Z direction. The two ends of the limiting waist-shaped hole 321 extend along the length direction of the moving rod.

Also, the handle 300 further includes a pin 330. Two ends of the pin shaft 330 are respectively connected with the rod part 310, and the pin shaft 330 penetrates through the limiting waist-shaped hole 321. Specifically, the rod portion 310 is provided with a shaft hole 313 extending vertically or horizontally, and the pin 330 sequentially passes through the shaft hole 313 and the limiting waist-shaped hole 321, so that the pin 330 can limit the movable rod, and the movable rod can only move along the length direction of the movable rod and cannot be separated from the rod portion 310.

Of course, it is not excluded that the rod portion 310 is provided with a limiting groove, and the wall surface of the limiting groove is slidably connected with the moving rod to limit the moving rod.

Specifically, the movable rod includes a first cylindrical portion 320, a square portion 340 and a second cylindrical portion 350, the first cylindrical portion 320, the square portion 340 and the second cylindrical portion 350 are sequentially connected through an integral forming process, a central axis of the first cylindrical portion 320, a central axis of the square portion 340 and a central axis of the second cylindrical portion 350 are overlapped, the square portion 340 is provided with the third through hole 341, the first cylindrical portion 320 is provided with the limit waist-shaped hole 321, and an axial direction of the third through hole 341 is consistent with an axial direction of the limit waist-shaped hole 321.

In this embodiment, the second through hole 312 has a cylindrical shape, and the shape thereof matches the first cylindrical portion 320 and the second cylindrical portion 350. At this time, the side length of the block portion 340 in the Y direction is smaller than the diameter of the first cylindrical portion 320.

Of course, a quadrangular prism may be used instead of the first cylindrical portion 320 and the second cylindrical portion 350. Further, the waist-shaped hole 321 may be provided in the second cylindrical portion 350.

Further, the inner wall surface of the second through hole 312 is recessed along a direction perpendicular to the axial direction of the pin 330 to form a positioning groove, and the positioning groove extends from the open end of the second through hole 312 along the length direction of the rod portion 310. In this embodiment, the axial direction of the shaft hole 313 extends up and down for the pin 330 to insert; the length direction and the X direction of constant head tank are unanimous, and the constant head tank can set up one or two or more, and is preferred, sets up two constant head tanks and is located the left side and the right side of carriage release lever respectively. To reduce manufacturing difficulties, the bottom surface of the detent extends through the surface of the stem portion 310.

The square part 340 is connected with the positioning groove in an adaptive manner, and at the moment, the side length of the square part 340 in the Y direction is larger than the diameter of the first cylindrical part 320, so that the square part can extend into the positioning groove. Set up the constant head tank, make when the carriage release lever is installed in pole portion 310, the constant head tank can play the positioning action, avoids the relative pole portion 310 of carriage release lever to rotate, makes shaft hole 313 aim at with spacing waist type hole 321 to reduce the installation degree of difficulty of round pin axle 330.

In this embodiment, the handle 300 includes a rod portion 310, a moving rod and an elastic member, the rod portion 310 is designed as a hollow straight rod, and one end of the moving rod is exposed out of the second through hole 312, so that an operator can conveniently grip the moving rod with one hand, and the handle 300 and the puncture cannula 100 can be quickly disassembled and assembled.

The detachable percutaneous puncture positioning tool can be used for carrying out effective high-temperature disinfection, and meanwhile, the handle 300 is made of metal materials, so that the handle 300 is guaranteed to have better durability in the hammering process; moreover, the handle 300 is quickly disassembled in the perspective process, so that the puncture positioning tool is prevented from accidentally falling off due to heavy weight and light feet, and the X-ray positioning observation is prevented from being influenced by the fact that the puncture positioning tool shields rays.

As shown in fig. 1, 2, 4, 5, 8 and 9, the workflow for using the detachable percutaneous puncture positioning tool is as follows:

firstly, a surgical plan and a part are made according to the relevant image data of preoperative X-ray, CT, MRI and the like of a patient.

Next, the surgical segment is identified under C-arm machine positioning and the body surface projection location of the target pedicle is marked.

Then, a puncture kit consisting of the puncture cannula 100, the puncture needle 200 and the handle 300 is adopted in the operation, the needle inserting direction is accurately mastered by holding the handle 300, the puncture is carried out at the determined pedicle projection position, and the bone surface of the puncture kit at the pedicle projection position is fixed by knocking the upper end metal part (namely, the end head 220) of the puncture needle 200.

Subsequently, the handle 300 is removed from the puncture kit, leaving only the puncture cannula 100 and the puncture needle 200, and a C-arm fluoroscopy is performed on the surgical site to assess whether the positioning is accurate.

If the positioning is accurate, the handle 300 is quickly installed, the handle 300 is fixed with the puncture cannula 100, and the puncture suite is gradually extended into the interior of the pedicle of vertebral arch to a proper depth under the action of repeated hammering action on the upper metal part (namely, the end head 220) of the puncture needle 200 and the direction control of the handle 300, so that the establishment of the nail placing channel of the pedicle of vertebral arch screw is completed.

After completion of the staple placement channel, the introducer needle 200 is then removed from the puncture cannula 100 and the staple guide 400 is then implanted within the puncture cannula 100 to ensure that the staple guide 400 extends to the proper depth within the spinal column 500.

Finally, the puncture cannula 100 is rotationally pulled out of the body by using the handle 300, the screw placing guide pin 400 is remained in the spine 500, and the screw placing work of the hollow pedicle screw is completed according to the guiding function of the screw placing guide pin 400.

While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention as set forth in the claims appended hereto.