CN107981925B

CN107981925B - Intra-pelvic support fixing system

Info

Publication number: CN107981925B
Application number: CN201711422969.8A
Authority: CN
Inventors: 陈滨; 向杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-12-25
Filing date: 2017-12-25
Publication date: 2020-12-25
Anticipated expiration: 2037-12-25
Also published as: CN107981925A

Abstract

The invention discloses an intrapelvic support fixing system which comprises two pelvic screws, a bent rod and a connecting assembly, wherein the bent rod is used for being placed under the abdomen, one ends of the two pelvic screws are connected with the bent rod, the connecting assembly is telescopic in length, and the other ends of the two pelvic screws are correspondingly connected with the two end parts of the connecting assembly respectively. According to the invention, the two pelvis screws, the bent rod and the connecting component form a closed ring, and the ring structure enables the whole structure to be more stable; meanwhile, the connecting assembly can be extended and contracted in length, so that two pelvis screws can be propped open or tightened, the function of pressure regulation in the left and right directions of the pelvis is realized, and the pressure regulation operation is simpler.

Description

Intra-pelvic support fixing system

Technical Field

The invention belongs to the technical field of medical auxiliary instruments, and particularly relates to an intrapelvic support fixing system.

Background

Pelvic fractures are a type of serious injury to the orthopedics, and common surgical fixation fracture methods include anterior pelvic ring fixation, posterior pelvic ring fixation, and channel screw fixation. The anterior pelvic ring fixing mode mainly comprises an external fixing bracket, steel plate screw fixing, percutaneous rod nailing system fixing and pure screw fixing; a transiliac steel plate fixing, an iliac rod fixing, a transiliac nail rod fixing and an adjustable bone fracture plate are fixed behind the pelvis; channel screw fixation the main spine pelvis screw rod system fixation, which is suitable for the case where the pelvis and the lumbar spine are fixed together.

In the three ways, the internal fixing apparatus is divided into two parts, one part is in front of the pelvis, the other part is in the pelvis, and the two parts are separated, so that the overall stability is insufficient; various instruments are different in standard and inconvenient to connect; meanwhile, the existing fracture fixation mode cannot conveniently adjust the pressure between the apparatus and the pelvis.

Disclosure of Invention

In order to solve the problems, the invention provides an internal pelvic support fixing system which is stable in structure and can conveniently adjust pressure.

In order to achieve the purpose, the invention is realized according to the following technical scheme:

the pelvis screw fixing system comprises two pelvis screws, a bent rod used for being placed under the abdomen, a connecting assembly with the length being adjustable, and connecting assemblies, wherein one ends of the two pelvis screws are connected with the bent rod, and the other ends of the two pelvis screws are correspondingly connected with the two end portions of the connecting assembly respectively.

Further, the connecting assembly comprises a connecting piece and two adjusting pieces for connecting with the pelvis screw, wherein the two adjusting pieces are respectively arranged at two ends of the connecting piece and are connected to the connecting piece in a manner of approaching to or separating from each other.

Further, the connecting piece and the adjusting piece are connected in a threaded mode.

Further, the connecting piece is a sleeve provided with an internal thread hole, and the internal thread hole comprises a first thread section which is a left-handed thread and a second thread section which is a right-handed thread;

the two adjusting pieces are respectively a first connecting screw with left-handed threads and a second connecting screw with right-handed threads;

the first connection screw is connected to the first threaded section and the second connection screw is connected to the second threaded section.

Further, telescopic outer wall is equipped with and supplies spanner joint in order to rotate telescopic joint portion.

Further, the first connection screw is provided with a first nut for limiting a distance by which the first connection screw is screwed into the sleeve.

Further, the second connecting screw is provided with a second nut for limiting the distance by which the second connecting screw is screwed into the sleeve.

Furthermore, the head parts of the first connecting screw and the second connecting screw are respectively provided with a lantern ring for the tail part of the pelvis screw to pass through, and the pelvis screw is provided with a fixing nut for limiting the lantern ring to slide off the pelvis screw.

Furthermore, the head of the pelvis screw is provided with an open slot for placing the bent rod into the pelvis screw, and the inner wall of the open slot is provided with threads; the sealing device also comprises a sealing screw used for limiting the bent rod to slide out of the open slot, and the sealing screw is in threaded connection with the open slot.

Furthermore, the pelvis screw fixing device further comprises an iliac connecting rod, and the iliac connecting rod is sleeved on the pelvis screw.

Compared with the prior art, the invention has the beneficial effects that:

the two pelvis screws, the bent rod and the connecting component form a closed ring, and the ring structure enables the whole structure to be more stable; meanwhile, the connecting assembly can be extended and contracted in length, so that two pelvis screws can be propped open or tightened, the function of pressure regulation in the left and right directions of the pelvis is realized, and the pressure regulation operation is simpler.

Drawings

Embodiments of the invention are described in further detail below with reference to the attached drawing figures, wherein:

fig. 1 is a schematic structural view of an intra-pelvic stent fixation system according to embodiment 1 of the present invention;

FIG. 2 is a disassembled schematic view of FIG. 1;

FIG. 3 is a cross-sectional view of a sleeve according to embodiment 1 of the present invention;

fig. 4 is a schematic structural diagram of an intra-pelvic stent fixing system according to embodiment 2 of the present invention.

In the figure:

1-bending a rod;

2-pelvic screws;

21-fixing a nut; 22-open slots;

3-connecting the components;

31-a sleeve; 311-an internal threaded hole; 3111-first thread segment 3111; 3112-a second thread segment;

32-first connection screw; 321-a first nut; 322-a first collar;

33-a second connection screw; 331-a second nut; 332-a second collar;

4-sealing screws;

5-ilium connecting rod.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Example 1

As shown in fig. 1 to 3, the pelvic internal support fixing system according to the present invention comprises a curved rod 1, two pelvic screws 2, and a connecting assembly 3, wherein the curved rod 1 is used for being placed under the abdomen, and the pelvic screws 2 are used for passing through the ilium of the pelvis. One end of each of the two pelvis screws 2 is connected with the corresponding curved rod 1, and the other end of each of the two pelvis screws 2 is correspondingly connected with two ends of the corresponding connecting component 3, namely, the two pelvis screws 2, the corresponding curved rod 1 and the corresponding connecting component 3 form a closed ring, and the ring-shaped structure enables the whole structure to be more stable. Meanwhile, the connecting assembly 3 can be telescopic in length, and when the connecting assembly 3 is extended, the two pelvic screws 2 can be unfolded reversely; when the connecting component 3 is shortened, the two pelvis screws 2 can be tightened in the same direction, and the function of pressure regulation in the left and right directions of the pelvis is realized.

Preferably, the connecting assembly 3 comprises a connecting member and two adjusting members, which are respectively provided at both ends of the connecting member and connected thereto, each adjusting member being connected to a corresponding pelvic screw 2. Moreover, the two adjusting pieces can approach or depart from each other on the connecting piece, and when the two adjusting pieces depart from each other, the connecting component 3 is extended; when the two adjusting parts are brought closer together, this corresponds to the shortening of the connecting assembly 3.

Preferably, the connecting piece and the adjusting piece are in threaded connection, and the two adjusting pieces can be screwed into the connecting piece for adjusting the length of the connecting component 3 to stretch. Specifically, the connecting member is a sleeve 31, the sleeve 31 is provided with an internal threaded hole 311, the internal threaded hole 311 includes two segments, namely a first threaded segment 3111 and a second threaded segment 3112, wherein the first threaded segment 3111 is a left-handed thread, and the second threaded segment 3112 is a right-handed thread. Correspondingly, the two adjusting members are a first connecting screw 32 and a second connecting screw 33, respectively, and the first connecting screw 32 is provided with left-handed threads and is connected to the first thread section 3111; the second coupling screw 33 is provided with a right-hand thread and coupled to the second threaded section 3112. At this time, the retaining sleeve 31 does not rotate, and when the first connecting screw 32 and the second connecting screw 33 rotate in one direction at the same time, the first connecting screw 32 and the second connecting screw 33 both screw into corresponding thread sections to realize that the first connecting screw 32 and the second connecting screw 33 approach each other; when the first connection screw 32 and the second connection screw 33 are rotated in the other direction at the same time, the first connection screw 32 and the second connection screw 33 are both screwed out of the corresponding thread sections, so that the first connection screw 32 and the second connection screw 33 are far away from each other. Similarly, when the first connection screw 32 and the second connection screw 33 are held against rotation, the sleeve 31 is rotated in one direction, and the first connection screw 32 and the second connection screw 33 are simultaneously screwed into the corresponding threaded sections under the action of the threaded force, so that the first connection screw 32 and the second connection screw 33 approach each other; by rotating the sleeve 31 in the other direction, the first coupling screw 32 and the second coupling screw 33 are simultaneously screwed out of the respective thread segments, away from each other, by the action of the thread forces. Based on the above principle, after the assembly of the components is completed, that is, after the curved rod 1, the two pelvic screws 2 and the connecting assembly 3 form a closed ring, the first connecting screw 32 and the second connecting screw 33 are connected to the corresponding pelvic screw 2 and cannot rotate, at this time, the sleeve 31 is rotated in two opposite directions, so that the first connecting screw 32 and the second connecting screw 33 can be close to or away from each other, the expansion and contraction of the connecting assembly 3 are realized, and the purpose of expanding or contracting the two pelvic screws 2 is achieved.

Preferably, the outer wall of the sleeve 31 is provided with a clamping portion 312, the clamping portion 312 is adapted to a wrench, and the wrench can conveniently rotate the sleeve 31 after being clamped in the clamping portion 312. The clamping portions 312 are connected to two ends of the sleeve 31, and are respectively disposed at two ends of the sleeve 31, specifically, the clamping portions 312 are regular hexagonal prisms integrally formed with the sleeve 31 and surround the outer wall of the sleeve 31.

Preferably, the first connecting screw 32 is provided with a first nut 321, the first nut 321 is screwed to the first connecting screw 32, after the position between the first connecting screw 32 and the sleeve 31 is adjusted to a certain position, the first nut 321 is rotated to abut against the end of the sleeve 31, at this time, if the sleeve 31 is further rotated, the first connecting screw 32 cannot be further screwed into the sleeve 31, and therefore, the first nut 321 plays a role of limiting the distance that the first connecting screw 32 is screwed into the sleeve 31. For the same purpose, it is preferable that the second coupling screw 33 is provided with a second nut 331, and the second nut 331 is screwed to the second coupling screw 33, and it is easily conceived that the second nut 331 also serves to limit the distance that the second coupling screw 33 is screwed into the sleeve 31.

Preferably, the heads of the first and

second connection screws

32 and 33 are provided with collars through which the tails of the pelvic screws 2 can pass, and specifically, the head of the first connection screw 32 is provided with a first collar 322, and the head of the second connection screw 33 is provided with a second collar 332.

Based on the shape of the pelvis, the two pelvis screws 2 are not parallel after passing through the corresponding ilia, but form an included angle, and the inner pelvis support fixing system is approximately in a fan shape in the use state. In order to allow the pelvis screw 2 to smoothly pass through the collar, the first collar 322 and the first connection screw 32 are preferably arranged obliquely relative to each other, and form an included angle, which is obtained by medical dissection of the pelvis and conversion of the included angle. Accordingly, the same connection between the second connection screw 33 and the second collar 332 is used.

Meanwhile, the pelvis screw 2 is provided with the fixing nut 21, the fixing nut 21 is connected to the pelvis screw 2 in a threaded manner, the fixing nut 21 can limit the lantern ring to slide off the pelvis screw 2, for example, in the process of assembling the first connecting screw 32 and the pelvis screw 2, the fixing nut 21 is firstly disassembled, then the pelvis screw 2 penetrates through the first lantern ring 322, and finally the fixing nut 21 is installed on the pelvis screw 2, at the moment, the fixing nut 21 can limit the first lantern ring 322 to slide off the pelvis screw 2, and therefore connection of the pelvis screw 2 and the first connecting screw 32 is achieved. The connecting component 3 can be pushed to slide along the pelvis screw 2 by rotating the fixing nut 21, so that the pressure between the connecting component 3 and the pelvis is changed, and the pressure regulating function of the front and back directions of the pelvis is realized. After the pressure adjustment operation is completed, the portion of the pelvic screw 2 beyond the fixing nut 21 may be sheared.

Preferably, the head of the pelvic screw 2 is provided with an open slot 22, and the curved rod 1 can be placed in the open slot 22. In order to connect the pelvis screw 2 with the bent rod 1, the invention also comprises a sealing screw 4, the inner wall of the open slot 22 is provided with screw threads, and after the bent rod 1 is placed in the open slot 22, the sealing screw 4 is in threaded connection with the open slot 22, so that the open slot 22 is sealed to form a closed ring shape, and the bent rod 1 is prevented from sliding out of the open slot 22.

Example 2

As shown in fig. 4, the difference between the embodiment 2 and the embodiment 1 is that the invention further comprises an iliac connecting rod 5, the iliac connecting rod 5 is sleeved on the pelvic screw 2, and the iliac connecting rod 5 can be connected and fixed with the lumbar vertebra.

Other configurations of an intradiscal stent fixation system of the present invention are described in the prior art.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.

Claims

1. The pelvis screw is used for penetrating the ilium of the pelvis, one end of each of the two pelvis screws is connected with the bent rod, the pelvis screw is characterized by further comprising a connecting assembly with the length being adjustable, and the other ends of the two pelvis screws are correspondingly connected with the two end parts of the connecting assembly respectively.

2. An intra-pelvic support fixation system according to claim 1, wherein the connection assembly comprises a connection member and two adjustment members for connection with the pelvic screws, the two adjustment members being provided at respective ends of the connection member and being connectable to the connection member in a manner to be able to move towards and away from each other.

3. An intra-pelvic support fixation system according to claim 2, wherein the connecting member and the adjustment member are threaded.

4. An intracorporeal stent fixation system as recited in claim 3,

the connecting piece is a sleeve provided with an internal thread hole, and the internal thread hole comprises a first thread section which is a left-hand thread and a second thread section which is a right-hand thread;

5. An intra-pelvic support fixation system according to claim 4, wherein the outer wall of the sleeve is provided with a snap-fit portion for a wrench to snap-fit to rotate the sleeve.

6. An intra-pelvic support fixation system according to claim 4, wherein the first connection screw is provided with a first nut for limiting the distance the first connection screw is screwed into the sleeve.

7. An intra-pelvic support fixation system according to claim 4, wherein the second connection screw is provided with a second nut for limiting the distance the second connection screw is screwed into the sleeve.

8. An intra-pelvic support fixation system according to claim 4, wherein the heads of the first and second connection screws are each provided with a collar through which the tail of the pelvic screw passes, the pelvic screw being provided with a fixation nut for limiting the collar from slipping off the pelvic screw.

9. The system for fixing a support in a pelvis according to claim 1, wherein the head of the pelvis screw is provided with an open slot for placing the curved rod therein, and the inner wall of the open slot is provided with screw threads; the sealing device also comprises a sealing screw used for limiting the bent rod to slide out of the open slot, and the sealing screw is in threaded connection with the open slot.

10. The system of claim 1, further comprising an iliac connector rod, wherein the iliac connector rod is sleeved over the pelvic screw.