CN219207242U

CN219207242U - Pelvis anterior ring fixing device

Info

Publication number: CN219207242U
Application number: CN202222409500.3U
Authority: CN
Inventors: 刘伟; 胡峰; 石小荣; 覃春海; 李育泉; 蒋捷; 潘钟杰
Original assignee: Second Affiliated Hospital of Guangxi Medical University
Current assignee: Second Affiliated Hospital of Guangxi Medical University
Priority date: 2022-09-09
Filing date: 2022-09-09
Publication date: 2023-06-20
Anticipated expiration: 2032-09-09

Abstract

The utility model provides a pelvis anterior ring fixing device, which comprises two groups of fixing pieces and a connecting rod; each group of fixing pieces comprises a locking steel plate, a first fixing nail, a second fixing nail and a connecting seat; the locking steel plate is of an arc-shaped plate structure, a plurality of fixing through holes are formed in the periphery of the plate surface of the locking steel plate at intervals, and each fixing through hole is provided with a fixing needle; one end of the locking steel plate in the length direction is provided with a first threaded hole, the other end of the locking steel plate is provided with a second threaded hole, and central axes of the first threaded hole and the second threaded hole are obliquely arranged; the first fixing nail is of a hollow nail structure and is penetrated and arranged on the locking steel plate through a first threaded hole; the second fixing nails are penetrated and arranged on the locking steel plate through the second threaded holes; the connecting seat is arranged on one side plate surface of the locking steel plate through a universal joint; the two groups of fixing pieces are detachably connected through the connecting rod. The device forms the fixing device of the pelvic anterior ring by adopting the connecting rod and the double-side fixing pieces, and has better biomechanical stability effect.

Description

Pelvis anterior ring fixing device

Technical Field

The utility model relates to the technical field of orthopedic medical instruments, in particular to a pelvic anterior ring fixing device.

Background

The external fixation treatment of pelvis is an important content of the first-aid injury control of pelvis fracture, becomes an important tool for the recovery of pelvis fracture with unstable hemodynamics, can effectively recover the volume of pelvis, remarkably reduces the bleeding amount and improves the survival rate of patients. In addition, the external fixation frame of the pelvis anterior ring can also be used for the final fixation of open-book type pelvis injuries. External fixation with anterior and inferior ilium spike is a common fixation method with the advantage of strong biomechanical stability, but is traditionally considered as an external fixation tabu for the type of fracture in the ilium wings.

Traditional pelvic anterior ring injury treatment adopts incision reduction steel plate screw internal fixation, and although higher fracture reduction quality can be obtained, the wound is larger, the incision is long, the operation time is long, the bleeding is more, and the postoperative pain is obvious. With popularization of the minimally invasive concept, the minimally invasive treatment is realized in the pelvic fracture surgery treatment, and has the advantages of small trauma, less bleeding, less complications, quick rehabilitation and the like, and is favored by students. Representative techniques for pelvic minimally invasive treatment are channel screw fixation, including anterior superior iliac-posterior superior iliac channel screw (LC-II), with significant minimally invasive advantages. In recent years, the application of the pelvic anterior ring subcutaneous internal stent (INFIX) avoids the defects of external fixation of nail tract infection risk, difficult nursing, poor appearance, influence on daily life and the like. The guidelines for minimally invasive surgical treatment of chinese pelvic fractures clearly indicate that INFIX is one of the minimally invasive procedures for pelvic anterior ring injury. The adoption of the prior LC-11 screw is easy to press the femoral nerve and the blood vessel, and is directly caused by the fact that the connecting rod is too low to press the femoral nerve in INFIX installation, and the functions of limbs are seriously affected due to the fact that the four-head muscle strength of the thigh is reduced, the knee extension is limited and the like. The scholars can reduce the compression of INFIX to the vascular nerve by improving the nail placing mode, for example, the safe distance between the tail of the nail and the bone surface is reserved in the nailing process, and the nail placing direction is also adjusted from the anterior lower iliac spine to the posterior lower iliac spine and above the ischial great incision, but no ideal internal stent placing mode exists at present. Meanwhile, the traditional pelvic anterior intra-annular bracket system is a single screw for 'linear' fixation, the rotation of the pelvis is controlled to be weaker, and as the internal fixing device provided in the pelvic fracture anterior annular fixing detachable screw and the internal fixing device of the Chinese patent application with the application number of 202123436199.7, the pelvis is fixed by adopting one screw.

Therefore, in order to form more stable 'plane' fixation, the stability of fixation is effectively increased, and the application provides a pelvic anterior ring fixing device, so that the stability of fixation is improved by adopting two angulation locking screws for fixation, and the effect is better.

Disclosure of Invention

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

a pelvis anterior ring fixing device, which comprises two groups of fixing pieces and a connecting rod; each group of fixing pieces comprises a locking steel plate, a first fixing nail, a second fixing nail and a connecting seat; the locking steel plate is of an arc-shaped plate structure, a plurality of fixing through holes are formed in the periphery of the plate surface of the locking steel plate at intervals, and each fixing through hole is provided with a fixing needle; a first threaded hole is formed in one end of the locking steel plate in the length direction, a second threaded hole is formed in the other end of the locking steel plate, and central axes of the first threaded hole and the second threaded hole are obliquely arranged; the first fixing nail is of a hollow nail structure, is inserted and arranged on the locking steel plate through the first threaded hole, and the needle point of the first fixing nail is positioned on the side of the arc center of the arc of the locking steel plate and is inclined to the side of the second threaded hole; the second fixing nail is of a solid nail structure, the diameter of the second fixing nail is smaller than that of the first fixing nail, the second fixing nail is penetrated and arranged on the locking steel plate through a second threaded hole, the needle point of the second fixing nail is also positioned at the side of the arc center of the locking steel plate, the needle point of the second fixing nail is inclined to the side of the first threaded hole, and the part of the second fixing nail extending to the end of the first threaded hole is positioned below the first fixing nail; the connecting seat is arranged on one side plate surface of the locking steel plate through a universal joint, the one side plate surface is opposite to the side where the arc center of the arc shape of the locking steel plate is located, the connecting seat is positioned between the first threaded hole and the second threaded hole, a clamping groove is formed in one end part of the connecting seat, which is away from the locking steel plate, no side wall is arranged on the two opposite sides of the clamping groove, the clamping groove is provided with an internal thread structure, a locking tail cap is connected with the internal thread structure through threads, and the locking tail cap is detachably connected with the connecting seat;

the two groups of fixing pieces are detachably connected through the connecting rod, two ends of the connecting rod are connected with the connecting seat of the fixing piece through clamping grooves in a clamping mode, and the two groups of fixing pieces are locked on the fixing piece in a mode of being abutted by the locking tail cap, and at the moment, second threaded holes on the two groups of fixing pieces are located between the two first threaded holes.

Preferably, a section of the clamping groove close to the end part of the connecting seat is provided with an internal thread structure, and a section of the clamping groove close to the bottom of the groove is not provided with an internal thread structure.

Preferably, the connecting rod is in an arc-shaped rod structure.

Preferably, the diameter of the first staple is 6.5 mm and the diameter of the second staple is 5.5 mm.

Preferably, the length of the first staple is greater than the length of the second staple.

Preferably, the fixation needle is a 1.5 millimeter k-wire.

Preferably, the material of the fixing piece and the connecting rod is titanium alloy material.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model provides a pelvic anterior ring fixing device based on contraindication, clinical minimally invasive concept demand and the defect of existing internal support design, which comprises two groups of fixing pieces and a connecting rod, wherein the two groups of fixing pieces are respectively arranged and fixed on two sides of a pelvis, each group of fixing pieces is attached to the surface of the anterior and external bones of the anterior and lower spine of the human pelvis through a locking steel plate with an arc-shaped plate-shaped structure, the two fixing pieces are fixed through two fixing nails connected through threads on the locking steel plate, wherein the first fixing nail is used for fixing the fracture position of the ilium wing from the lower slant, particularly the upper spine after being nailed from the outer side of the anterior and lower spine of the ilium, the second fixing nail is used for fixing from the upper slant, particularly the anterior and lower spine of the ilium is nailed in front of the ischial large incision, and the two fixing nails of each group of fixing pieces form a certain angle, so that the anti-rotation and displacement effects of the hip bone are increased, the two groups of fixing pieces are bridged through the connecting rod arranged under the skin, and the connecting rod is used for connecting the two sides of the pelvis through the fixing pieces, so that the purpose of not stretching the pelvis is achieved.

2. The fixing device designed by the utility model has a good fixing effect, and can be used for fixing the fracture of the pelvic anterior ring and fixing pubic symphysis separation.

Drawings

FIG. 1 is a schematic view of the structure of the utility model secured to the pelvis;

FIG. 2 is a perspective view corresponding to FIG. 1;

FIG. 3 is a front view of FIG. 1;

FIG. 4 is a top view of FIG. 1;

FIG. 5 is a schematic view of the structure of the fastener, wherein the locking tail cap, the first staple, the second staple and the needle are not shown.

Description of the main reference signs

In the figure: the locking steel plate 1, the fixing through hole 2, the first threaded hole 3, the second threaded hole 4, the first fixing nail 5, the second fixing nail 6, the universal joint 7, the connecting seat 8, the clamping groove 9, the internal thread structure 10, the locking tail cap 11, the connecting rod 12 and the pelvis 13. The utility model will be further described in the following detailed description in conjunction with the above-described figures.

Detailed Description

Referring to fig. 1-5, in a preferred embodiment of the present utility model, a pelvic anterior ring fixation device includes two sets of fixation members and a connecting rod 12. Each group of fixing pieces comprises a locking steel plate 1, a first fixing nail 5, a second fixing nail 6 and a connecting seat 8; the locking steel plate 1 is of an arc plate-shaped structure, a plurality of fixing through holes 2 are formed in the periphery of the plate surface of the locking steel plate 1 at intervals, and each fixing through hole 2 is provided with a fixing needle; a first threaded hole 3 is formed in one end of the locking steel plate 1 in the length direction, a second threaded hole 4 is formed in the other end of the locking steel plate, and central axes of the first threaded hole 3 and the second threaded hole 4 are obliquely arranged; the first fixing nail 5 is of a hollow nail structure, is inserted and arranged on the locking steel plate 1 through the first threaded hole 3, and the needle point of the first fixing nail 5 is positioned on the side of the arc center of the arc of the locking steel plate 1 and is inclined to the side of the second threaded hole 4; the second fixing nail 6 is of a solid nail structure, the diameter of the second fixing nail 6 is smaller than that of the first fixing nail 5, the second fixing nail 6 is arranged on the locking steel plate 1 in a penetrating mode through the second threaded hole 4, the needle point of the second fixing nail 6 is also located on the side of the arc center of the arc of the locking steel plate 1, the needle point of the second fixing nail is inclined to the side of the first threaded hole 3, and the part, extending to the end of the first threaded hole 3, of the second fixing nail 6 is located below the first fixing nail 5; the connecting seat 8 is installed on a side plate surface of the locking steel plate 1 through the universal joint 7, the side plate surface is opposite to the side where the arc center of the locking steel plate 1 is located, the connecting seat 8 is located between the first threaded hole 3 and the second threaded hole 4, a clamping groove 9 is formed in one end portion, deviating from the locking steel plate 1, of the connecting seat 8, no side wall is arranged on the two opposite sides of the clamping groove 9, the clamping groove 9 is provided with an internal thread structure 10, a locking tail cap 11 is connected through threads of the internal thread structure 10, and the locking tail cap 11 is detachably connected with the connecting seat 8.

The two groups of fixing pieces are detachably connected through the connecting rod 12, two ends of the connecting rod 12 are clamped with the connecting seat 8 of the fixing piece through the clamping groove 9, and are locked on the fixing pieces in a mode of being abutted by the locking tail cap 11, and at the moment, the second threaded holes 4 on the two groups of fixing pieces are positioned between the two first threaded holes 3.

The utility model forms a fixation system of the anterior ring of the pelvis 13 by two sets of fixation elements and a connecting rod 12.

Specifically, two sets of fixing parts are separately arranged and fixed on two sides of the pelvis 13, and are preferably symmetrically arranged, each set of fixing parts is attached to the pelvis 13 of a human body through a locking steel plate 1 with an arc-shaped plate structure, specifically attached to the surface of the front outer side bone of the front lower ilium of the pelvis of the human body, the radian of the locking steel plate 1 is determined by the radian of the outer side of the front lower ilium of the pelvis 13 of the human body, the device is in actual use, the radian design is designed according to data extracted after CT scanning of the human body, and the device is attached to the front lower ilium of the pelvis 13 of the human body when in use. The locking steel plate 1 is stuck to the pelvis 13 of the human body and then is driven into a fixing needle through a fixing through hole 2 at the periphery of the pelvis to achieve temporary fixation, and the fixing needle is a Kirschner wire of 1.5 mm in the embodiment.

In the utility model, the locking steel plate 1 is fixed on the pelvis 13 of a human body through two fixing nails which are connected with two threaded holes on the locking steel plate in a threaded way, wherein the first fixing nail 5 is used for fixing the fracture position of the ilium wing from the lower inclined upwards, particularly for driving the posterior upper spine of the ilium from the outer side of the anterior lower spine of the ilium, the second fixing nail 6 is used for fixing from the upper inclined downwards, particularly for driving the anterior upper spine of the ilium into the front of a ischial great incision through the acetabulum and is positioned above the top of the acetabulum, and the two fixing nails of each group of fixing parts form a certain angle, so that the anti-rotation and displacement effects of the hip bone are increased. In the present utility model, the diameters of the two staples are different, and in the present embodiment, the diameter of the first staple 5 is 6.5 mm, and the diameter of the second staple 6 is 5.5 mm; in addition, the length of the first staples 5 is preferably made longer than the length of the second staples 6.

The two groups of fixing parts connected with the pelvis 13 are bridged by the connecting rod 12 which is placed under the skin, and the two sides of the pelvis 13 are connected by the connecting rod 12 through the fixing parts, so that the pelvis 13 can not be opened, and the purpose of fixing is achieved. In the present embodiment, the connecting rod 12 is connected with the fixing member through the connecting seat 8 of the fixing member, specifically, the connecting rod 12 is clamped on the connecting seat 8 through the clamping groove 9 on the connecting seat 8, and then is locked on the fixing member through the mode that the locking tail cap 11 is screwed into the clamping groove 9 and abuts against the connecting rod 12. In this embodiment, preferably, the clamping groove 9 is provided with an internal thread structure 10 at a section near the end of the connecting seat 8, and the part of the clamping groove 9 near the bottom of the groove is not provided with the internal thread structure 10, and the connecting rod 12 is clamped between the internal thread structure 10 and the bottom of the clamping groove 9. Preferably, the connecting rod 12 has an arcuate rod-like structure.

Further, the material of the fixing member and the connecting rod 12 of the present utility model is titanium alloy material, which is the same as the material of the structure conventionally put into the human body.

The foregoing description is directed to the preferred embodiments of the present utility model, but the embodiments are not intended to limit the scope of the utility model, and all equivalent changes or modifications made under the technical spirit of the present utility model should be construed to fall within the scope of the present utility model.

Claims

1. A pelvic anterior ring fixation device, characterized in that: comprises two groups of fixing pieces and a connecting rod; each group of fixing pieces comprises a locking steel plate, a first fixing nail, a second fixing nail and a connecting seat; the locking steel plate is of an arc-shaped plate structure, a plurality of fixing through holes are formed in the periphery of the plate surface of the locking steel plate at intervals, and each fixing through hole is provided with a fixing needle; a first threaded hole is formed in one end of the locking steel plate in the length direction, a second threaded hole is formed in the other end of the locking steel plate, and central axes of the first threaded hole and the second threaded hole are obliquely arranged; the first fixing nail is of a hollow nail structure, is inserted and arranged on the locking steel plate through the first threaded hole, and the needle point of the first fixing nail is positioned on the side of the arc center of the arc of the locking steel plate and is inclined to the side of the second threaded hole; the second fixing nail is of a solid nail structure, the diameter of the second fixing nail is smaller than that of the first fixing nail, the second fixing nail is penetrated and arranged on the locking steel plate through a second threaded hole, the needle point of the second fixing nail is also positioned at the side of the arc center of the locking steel plate, the needle point of the second fixing nail is inclined to the side of the first threaded hole, and the part of the second fixing nail extending to the end of the first threaded hole is positioned below the first fixing nail; the connecting seat is arranged on one side plate surface of the locking steel plate through a universal joint, the one side plate surface is opposite to the side where the arc center of the arc shape of the locking steel plate is located, the connecting seat is positioned between the first threaded hole and the second threaded hole, a clamping groove is formed in one end part of the connecting seat, which is away from the locking steel plate, no side wall is arranged on the two opposite sides of the clamping groove, the clamping groove is provided with an internal thread structure, a locking tail cap is connected with the internal thread structure through threads, and the locking tail cap is detachably connected with the connecting seat;

2. A pelvic anterior ring fixation apparatus as claimed in claim 1, wherein: the clamping groove is provided with an internal thread structure at a section close to the end part of the connecting seat, and the part of the clamping groove close to the bottom of the groove is not provided with the internal thread structure.

3. A pelvic anterior ring fixation apparatus as claimed in claim 1, wherein: the connecting rod is of an arc rod-shaped structure.

4. A pelvic anterior ring fixation apparatus as claimed in claim 1, wherein: the diameter of the first staple was 6.5 millimeters and the diameter of the second staple was 5.5 millimeters.

5. A pelvic anterior ring fixation apparatus as claimed in claim 1, wherein: the length of the first staple is greater than the length of the second staple.

6. A pelvic anterior ring fixation apparatus as claimed in claim 1, wherein: the fixed needle is a 1.5 mm Kirschner wire.

7. A pelvic anterior ring fixation apparatus as claimed in claim 1, wherein: the fixing piece and the connecting rod are made of titanium alloy materials.