CN214208464U

CN214208464U - Spinal nail rod/hook system capable of being propped open/pressurized in reduction process

Info

Publication number: CN214208464U
Application number: CN202022653179.4U
Authority: CN
Inventors: 郑光亮; 罗燃杰
Original assignee: Changzhou Orthmed Medical Instrument Co Ltd
Current assignee: Changzhou Orthmed Medical Instrument Co Ltd
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-09-17
Anticipated expiration: 2030-11-17

Abstract

The utility model discloses a spinal nail rod/hook system capable of being propped open/pressurized in the resetting process, relating to the technical field of orthopedic surgery appliances. The implant screw comprises an implant screw, wherein an implant rod/an implant hook vertical to the implant screw is arranged on the implant screw, and threads are arranged on the implant rod/the implant hook; the gun type reduction forceps main body is used for holding and installing the implant screw and positioning and reducing the implant screw; the gun type reduction forceps are characterized in that a guide sleeve is arranged on the gun type reduction forceps main body, a rotatable control rod is arranged on the guide sleeve, one end of the control rod is meshed with the thread of the implantation rod/implantation hook, and the control rod is used for controlling the distance from the end part of the implantation rod/implantation hook to the implantation screw. The utility model provides a pair of can strut pressurized backbone nail stick/hook system at the in-process that resets through the design to apparatus and implantation screw, will reset, pressurize, and strut and combine together, reduce the use apparatus quantity and the operating procedure in the operation that resets, reduced the operation requirement and the operation degree of difficulty.

Description

Spinal nail rod/hook system capable of being propped open/pressurized in reduction process

Technical Field

The utility model relates to the technical field of orthopedic surgery appliances, in particular to a spinal nail bar/hook system which can be propped open/pressurized in the resetting process.

Background

In spinal surgery, bones or other tissues are supported by the implantation of pedicle screws or hooks to correct deformities and hold the tissues in place. For example, when it is desired to correct scoliosis or other abnormal curvature or misalignment of the spine, fixed pedicle screws, rods, or other like members may be inserted along one or more spinal segments to support or maintain the segments in the correct position. Pedicle screws, pedicle hooks, or other implants are surgically secured to the vertebrae and connected with connecting members.

Typically, the fixation implant and the connecting member are placed separately, that is, they are not connected together prior to implantation in the body. For example, pedicle screws may be implanted into the vertebrae, the connecting element placed on or around the pedicle screws, and the connecting element placed in the body. The connecting member may be shaped to the desired curvature for connection prior to insertion or may be shaped after placement adjacent the spinal column. In the case of separate placement of the connecting member and pedicle screw or other fixation element, the connecting member and pedicle screw need to be forced toward each other for connection. The process of connecting the connecting member and the fixing element by bringing them close to each other is generally referred to as "resetting".

The existing spine reduction tools mainly comprise swing forceps, frog type reduction forceps, reduction gun forceps, compression forceps, opening forceps and the like. When the device is used, the jackscrew (the implanted screw) is preassembled through the reduction forceps, then the compression forceps and the distraction forceps are used for pressurizing or distracting, and then the jackscrew (the implanted screw) is screwed. The device is complicated, the operation complexity is increased, the operation difficulty is increased, the jackscrew preassembly needs experience judgment, and the operation requirement is high.

Therefore, it is necessary to provide a further solution to the above problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior art, the main object of the present invention is to provide a spinal nail rod/hook system which can be opened/pressed in the resetting process, through the design of the instruments and the implanted screws, the resetting, pressing and opening are combined, the number of the instruments and the operation steps in the resetting operation are reduced, and the operation requirements and the operation difficulty are reduced.

In order to achieve the above purpose, the technical solution of the present invention is as follows:

a spinal rod/hook system that can be distracted/stressed during reduction, comprising an implant screw having an implant rod/hook perpendicular to the implant screw, the implant rod/hook having threads thereon; and

the gun type reduction forceps body is used for holding and installing the implant screw and positioning and reducing the implant screw;

the gun type reduction forceps are characterized in that a guide sleeve is arranged on the gun type reduction forceps main body, a rotatable control rod is arranged on the guide sleeve, one end of the control rod is meshed with the thread of the implantation rod/implantation hook, and the control rod is used for controlling the distance from the end part of the implantation rod/implantation hook to the implantation screw.

Optionally, the gun-type reduction forceps main body comprises a handle portion, a forceps body and a grasping sleeve, the handle portion is formed by a first handle and a second handle which are hinged in a crossed manner, the forceps body comprises a pushing shaft rod and a shaft sleeve, the pushing shaft rod is hinged to the upper end of the second handle, the shaft sleeve is arranged on the pushing shaft rod in a sleeved manner and is connected with the upper end of the first handle, the pushing shaft rod can move in a reciprocating manner in the shaft sleeve along the axis of the pushing shaft rod, the grasping sleeve is arranged on the pushing shaft rod and the shaft sleeve, and the grasping sleeve is used for holding and installing the implantation screw.

Optionally, the guiding sleeve is arranged on the gripping sleeve, the control rod has a first end and a second end, the first end is provided with an engaging portion, and the engaging portion is provided with engaging teeth engaged with the implantation rod/implantation hook.

Optionally, the control rod is parallel to the axis of the gripping sleeve, and the second end extends to an end of the gun-type reduction forceps body away from the implant screw.

Optionally, the second end is provided with a rotary handle for rotating the control rod.

Optionally, the guide sleeve is provided with a mounting hole for mounting the control rod, and the control rod is arranged in the mounting hole in a penetrating manner.

Optionally, the number of control levers is one.

Optionally, the number of the control levers is two; the two control rods are arranged in parallel.

Optionally, the engagement points of the engagement parts of the two control rods and the implant rod/implant hook are respectively positioned at two sides of the implant screw.

Optionally, the thread of the implant rod/implant hook is a self-locking thread.

The utility model provides a pair of can strut/pressor backbone nail stick/hook system at the in-process that resets, set up the screw thread on the implantation stick/implantation hook of implanting the screw, and set up rotatable control lever in the gun type pincers main part that resets, through making the control lever with implant stick/implant the threaded engagement on the hook, thereby the tip of implanting stick/implantation hook and the distance of the root of implanting the screw are implanted in order to be used for controlling through the rotation control lever, realize through implanting stick/implantation hook pressurization or the purpose of strutting, needn't reuse compression pincers and strut the instrument of pressurization such as pincers or strutting, the operation degree of difficulty and the operating procedure of bone surgery have been simplified, the operation requirement is reduced.

The utility model provides a pair of can prop open/pressor backbone nail stick/hook system at the in-process that resets, will reset, the pressurization combines together with strutting, reduces the use apparatus quantity and the operating procedure in the operation that resets, has simple structure, convenient to use's advantage.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic view of a spinal rod/hook system that may be distracted/compressed during reduction according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of the spinal rod/hook system shown in FIG. 1;

FIG. 3 is a front elevational view of the spinal rod/hook system according to FIG. 1;

FIG. 4 is a top view of the spinal rod/hook system shown in FIG. 1;

FIG. 5 is a schematic structural view of an implant screw having an implant hook for use with the spinal rod/hook system shown in FIG. 1;

fig. 6 is a schematic structural view of an implant screw having an implant rod for use with the spinal rod/hook system shown in fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the following description will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-4, the utility model provides a spinal nail rod/hook system capable of being propped open/pressed in the process of reduction, which can be used for reduction operations in orthopedic operations, etc., and belongs to a gun type reduction device, in particular to the positioning and reduction of implanted screws in spinal operations. Generally, the spinal rod/hook system comprises a gun-type reduction forceps body 1 and an implantation screw 2 used therewith. Implant screw 2 as shown in fig. 5 and 6, implant screw 2 has an implant rod/implant hook 21 thereon. The implant hook is a hook structure arranged at one end or two ends of the implant rod and used for hooking bones of an orthopedic operation for fixation. The implant rod/hook 21 is used to distract/compress the bone at the reduction surgery. The root of the implantation screw 2 is provided with a through hole, and the implantation rod/implantation hook 21 is inserted through the through hole and is movable. Typically, the implant rod/hook 21 is perpendicular to the implant screw 2. A thread 22 is provided on the implant rod/hook 21. Preferably, the thread 22 is a self-locking thread, i.e. the lead angle of the thread 22 is smaller than the equivalent friction angle of the screw pair, so that it is self-locking and is prevented from automatically loosening. The gun type reduction forceps main body 1 is used for holding and installing the implant screw 2, so that the implant screw 2 extends into a position needing reduction in an orthopedic operation, the implant screw 2 is fixed and installed at the position to be reduced, and positioning and reduction operation is achieved. The gun type reduction forceps main body 1 is provided with a guide sleeve 3. The guide sleeve 3 is provided with a rotatable control rod 4. One end (i.e., first end 41) of the control rod 4 engages the threads 22 of the implant rod/hook 21. By rotating the other end (i.e. the second end 42) of the control rod 4, the rotation of the control rod 4 can be transmitted to the movement of the implantation rod/implantation hook 21 in the through hole of the implantation screw 2 by the engagement action of the control rod 4 and the thread 22, i.e. the control of the distance from the end of the implantation rod/implantation hook 21 to said implantation screw 2 is achieved. When the orthopedic surgery is carried out, firstly, the implantation screw 2 with the implantation rod/implantation hook 21 is arranged on the gun type reduction forceps main body 1, the pre-installation of the implantation screw 2 is carried out through the gun type reduction forceps main body 1, then, one end of the implantation rod/implantation hook 21 is butted with or hooked on one side of the position to be restored, then, the second end 42 of the control rod 4 is rotated, the distance from one end of the implantation rod/implantation hook 21 butted with or hooked on the bone to the perforation position of the implantation screw 2 can be adjusted, meanwhile, as the implantation screw 2 is pre-installed in the bone, namely, the implantation screw 2 and the implantation rod/implantation hook 21 are butted with or hooked on one end of the bone are respectively fixed with the bone, at the moment, the distance between the implantation screw 2 and the end of the implantation rod/implantation hook 21 butted with or hooked on the bone is adjusted, the distraction or the pressurization of the bone to be reset can be realized. After distraction or pressurization, the thread 22 is a self-locking thread, so that automatic loosening of the meshing part when the second end 42 of the control rod 4 is loosened can be avoided, the distraction or pressurization state can be kept, and the implantation screw 2 is screwed down through the gun type reduction forceps main body 1 at the moment to complete the orthopedic operation. The utility model provides a pair of can prop open/pressor backbone nail stick/hook system at the in-process that resets, through making control lever 4 with implant stick/implant the screw thread 22 meshing on the hook 21, thereby through the distance of rotary control pole 4 with the tip that is used for controlling implant stick/implant hook 21 and the root of implanting screw 2, realize through implanting stick/implant hook 21 pressurization or the purpose of strutting, needn't reuse compression pincers and prop the instrument that pressurizes or strut such as pincers, the operation degree of difficulty and the operating procedure of bone surgery have been simplified, the operation requirement has been reduced, and the multifunctional surgical instrument has a simple structure, high durability and convenient use's advantage.

In particular, the gun-type reduction forceps body 1 may generally include a handle portion 11, a forceps body 12, and a grasping sleeve 13. The handle portion 11 is formed by cross-hinged a first handle 14 and a second handle 15. The forceps body 12 includes a pushing shaft 16 and a sleeve 17. A push shaft 16 is hingedly connected to the upper end of the second handle 15. The sleeve 17 is sleeved on the pushing shaft 16 and connected with the upper end of the first handle 14. The pushing shaft 16 is reciprocally movable along its axis within the sleeve 17. A gripping sleeve 13 is provided on the pushing shaft 16 and the bushing 17, the gripping sleeve 13 being used for holding the implant screw 2. It will be appreciated that the specific arrangement of the handle portion 11, body 12 and gripping sleeve 13 may be that of a gun-type reduction forceps as is well known to those skilled in the art. The technical scheme of the utility model lie in with traditional gun type reset forceps with, strut pincers and add the pressure pincers and combine together, make it have simultaneously and reset, strut and pressor function, realize the multi-purpose of a ware, reduce surgical instruments's use quantity, reduce the operation degree of difficulty of operation. The utility model provides a pair of can strut/pressor backbone nail stick/hook system at the in-process that resets, it lies in that to increase guide sleeve 3 and control lever 4 on the gun type pincers that reset among the prior art to set up the screw thread on implanting the stick/implanting hook 21 of implanting screw 2 and be used for the meshing, thereby make implanting stick/implanting hook 21 additionally increased and strut or pressor function.

As shown in fig. 1 to 4, the guide sleeve 3 is provided on the grip sleeve 13, and the guide sleeve 3 is provided with a mounting hole for mounting the control rod 4. The control rod 4 is arranged in the mounting hole in a penetrating way. It will be appreciated that the guide sleeve 3 may also be provided at other locations on the gun-type reduction forceps main body 1, the purpose of which is to rotatably mount the control lever 4 on the gun-type reduction forceps main body 1. The number of the guide sleeves 3 is set to 2 or more. The control rod 4 has a first end 41 and a second end 42. The first end 41 is provided with an engagement portion. The engaging part is provided with engaging teeth which are engaged with the implantation rod/implantation hook. Optionally, the control rod 4 is parallel to the axis of the grasping sleeve 13, and the second end 42 extends to the end of the gun-type reduction forceps body 1 away from the implantation screw 2. In a preferred embodiment, the second end 42 is provided with a knob 43. The lever 4 can be easily rotated by the knob 43 to increase its ease of use.

The number of control levers 4 may be one or two. As shown in fig. 2, which is a schematic diagram when the number of the control rods 4 is 2. When the number of the control rod 4 is one, it can only adjust the distance from one end of the implantation rod/implantation hook 21 to the implantation screw 2, and the installation has a certain directionality and limitation, but the structure is simpler and the operation is more convenient. When the number of the control levers 4 is two, the two control levers 4 are arranged in parallel. The engagement points of the engagement parts of the two control rods 4 and the engagement points of the implantation rod/implantation hook 21 are respectively positioned at two sides of the through hole of the implantation screw 2, so that the distance between the end part of the implantation rod/implantation hook 21 and the root part of the implantation screw 2 can be conveniently adjusted, the purpose of pressing or spreading through the implantation rod/implantation hook 21 is realized, and the advantage of good stability is achieved.

Fig. 5 and 6 are schematic views of the structure of the implant screw 2 used in the spinal rod/hook system of the present invention. The conventional implant screw 2, the implant rod/implant hook 21 of which is a smooth rod/hook, has only a function of positioning and fixing. The utility model discloses in, will implant stick/implant and add the screw thread that has the auto-lock nature on the hook 21 to adjust the tip of implanting stick/implant hook 21 and implant the distance between the screw 2 through the meshing effect, make it have simultaneously and strut/pressor effect, realized the pincers that reset, strut pincers, the integrated design of pressing the pincers.

The utility model provides a pair of can strut/pressor backbone nail stick/hook system at the in-process that resets, set up screw thread 22 on implanting stick/implantation hook 21 of implanting screw 2, and set up rotatable control lever 4 on gun type reduction forceps main part 1, through making control lever 4 and the screw thread 22 meshing of implanting stick/implantation hook 21, thereby through rotating control lever 4 with the distance that is used for controlling the tip of implanting stick/implantation hook 21 and the root of implanting screw 2, realize through implanting stick/implantation hook 21 pressurization or the purpose of strutting, needn't reuse compression pincers and the instrument that struts such as distraction pincers, the operation degree of difficulty and the operating procedure of bone surgery have been simplified, the operation requirement has been reduced.

The utility model provides a pair of can prop open/pressor backbone nail stick/hook system at the in-process that resets has following advantage:

1. the reduction, pressurization and distraction are combined, the instrument is simple, and the operation complexity and the tool cost are reduced.

2. In the process of opening or pressurizing, the implanted screw 2 is mechanically locked with the instrument, and the stability is high.

3. After reset, the locking is not required in advance, and after pressurization/expansion, the locking is directly and finally carried out, so that the operation difficulty is reduced.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A spinal rod/hook system capable of distraction/compression during reduction comprising

The implant screw is provided with an implant rod/an implant hook which is vertical to the implant screw, and the implant rod/the implant hook is provided with threads; and

2. The spinal nail rod/hook system according to claim 1, wherein said gun-type reduction forceps main body comprises a handle portion, a forceps body and a grasping sleeve, said handle portion is formed by cross-hinged connection of a first handle and a second handle, said forceps body comprises a pushing shaft and a shaft sleeve, said pushing shaft is hinged to the upper end of said second handle, said shaft sleeve is sleeved on said pushing shaft and connected to the upper end of said first handle, said pushing shaft can reciprocate in said shaft sleeve along the axis thereof, said grasping sleeve is arranged on said pushing shaft and said shaft sleeve, said grasping sleeve is used for grasping and installing said implant screw.

3. A spinal rod/hook system as claimed in claim 2, wherein said guide sleeve is provided on said grip sleeve, said control rod having a first end and a second end, said first end being provided with an engagement portion provided with engagement teeth for engagement with said implant rod/hook.

4. A spinal rod/hook system as claimed in claim 3 wherein said control rod is parallel to the axis of said gripping sleeve and said second end extends to an end of said gun reduction forceps body distal to said implant screw.

5. A spinal rod/hook system as claimed in claim 4, wherein said second end is provided with a knob for rotating said control rod.

6. A spinal rod/hook system as claimed in claim 4, wherein said guide sleeve is provided with a mounting hole for mounting said control rod, said control rod being disposed through said mounting hole.

7. A spinal rod/hook system as claimed in claim 4, wherein said control rod is one in number.

8. A spinal rod/hook system as recited in claim 4, wherein the number of control rods is two; the two control rods are arranged in parallel.

9. A spinal rod/hook system according to claim 8, wherein the engagement points of the engagement portions of the two control rods and the implant rod/hook are located on either side of the implant screw.

10. A spinal rod/hook system according to any one of claims 1-9, wherein the threads of the implant rod/hook are self-locking threads.