CN216652430U - Reduction forceps for treatment of acetabular posterior column fracture - Google Patents
Reduction forceps for treatment of acetabular posterior column fracture Download PDFInfo
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- CN216652430U CN216652430U CN202120799888.5U CN202120799888U CN216652430U CN 216652430 U CN216652430 U CN 216652430U CN 202120799888 U CN202120799888 U CN 202120799888U CN 216652430 U CN216652430 U CN 216652430U
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Abstract
A reduction forceps for treating acetabular posterior column fracture comprises an upper forceps sheet, a lower forceps sheet, a locking device and a hinge change structure; the middle parts of the upper and lower clamp pieces are hinged through a hinge change structure; the upper and lower clamp pieces are mutually matched to adapt to the reduction of fracture lines with different lengths for complex unstable acetabulum fracture; the locking device locks the matched upper and lower clamp pieces; the hinge change structure is provided with a hinge shaft and a change groove; the middle of the change groove can slide the hinge shaft to change the position of the hinge shaft, two ends of the change groove can lock the hinge shaft with the top of the hinge shaft and the bottom of the change groove in different directions, and the hinge shaft with the top of the hinge shaft and the bottom of the change groove in the same direction is released; the hinged shaft can be twisted to change the direction of the top of the hinged shaft; the utility model not only can adapt to the reduction of fracture lines with different lengths for complicated unstable acetabulum fractures, but also can change the hinging positions of the upper and lower clamp pieces through the hinging change structure, and has simple structure and convenient use.
Description
Technical Field
The utility model relates to the technical field of medical instruments, in particular to a pair of reduction forceps for treating acetabular posterior column fracture.
Background
The acetabulum consists of three parts, namely an ilium, an ischium and a pubis, and a large and deep socket is arranged on the outer side surface of the acetabulum and forms a hip joint with a femoral head. The acetabulum is an important component of the hip joint, and the hip joint is easy to damage due to heavy load and large mobility. The fracture of the acetabulum can be caused by the fracture of the pubic ischium or the ilium when the pelvis is fractured, or the central dislocation of the hip joint. The posterior column bone of acetabulum is composed of ischium (including ischium spine), posterior half of acetabulum, and compact bone of greater incisional track of ischium. The posterior column bone fracture of acetabulum is mostly seen in central dislocation of hip joint, and the lesser is seen in posterior dislocation of hip joint. The fracture line begins near the top of the greater notch of the ischial bone, enters the acetabular articular surface behind the acetabular roof, and goes down to the fossa, obturator foramen, and pubic and ischial branches, but does not involve the acetabular roof. The acetabulum fracture is a common complex fracture in the joint, and due to the deep anatomical position and complex fracture type, the difficulty of restoration and fixation is high during the operation; the commonly used reduction means at present mainly holds reduction through auxiliary traction and reduction clamps. The prior art has disclosed providing a concrete scheme (publication number CN 209253092U, name is a reduction forceps for acetabular posterior column fracture treatment) for acetabular posterior column fracture treatment, which can cope with the reduction of complicated unstable acetabular fractures adapting to fracture lines of different lengths, but when the hinged position between the upper forceps piece and the lower forceps piece is changed, the hinged position between the upper forceps piece and the lower forceps piece needs to be disassembled, and the upper forceps piece and the lower forceps piece are recombined after the hinged position is changed; the whole process is very troublesome and does not accord with the tense and urgent use environment of the operation site for using the reduction forceps.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems and provides a reduction forceps for treating acetabular posterior column fracture.
The technical scheme of the utility model is as follows: a reduction forceps for treating acetabular posterior column fracture comprises an upper forceps sheet, a lower forceps sheet and a hinge change structure; the middle parts of the upper and lower clamp pieces are hinged through a hinge change structure; the hinge change structure comprises a hinge shaft and a change groove positioned in the middle of one of the clamp pieces; the middle part of the articulated shaft is a cylindrical section; the top of the articulated shaft is a disc cut by two symmetrical equal-length chords, and the diameter of the disc is larger than that of the cylindrical section; the bottom of the change groove is a long hole; the long hole is matched with the middle cylindrical section of the articulated shaft; the two ends of the long hole at the top of the change groove are provided with round step holes matched with the round disc at the top of the articulated shaft, and the lower end of the articulated shaft passes through the change groove to be rotationally connected with the shaft hole at the middle part of the other clamp piece.
Preferably, the lower clamp piece comprises a clamping section A, an arc-shaped holding section A and a hook-shaped fixed end, the clamping section A is connected with one end of the arc-shaped holding section A, the connection part is of a hinge change structure, and the other end of the arc-shaped holding section A is connected with the hook-shaped fixed end; the end part of the clamping section A is provided with a lower clamping head with an arc transition at the tip, a clamping groove is arranged inwards from the lower clamping head, the bottom of the clamping groove is provided with a plurality of transverse tooth nails, and the outer end face of the hook body of the hook-shaped fixed end is provided with a latch;
the upper clamp piece comprises a clamping section B and an arc-shaped holding section B, an upper clamping head is arranged at the end part of the clamping section B, a reset nail clamping groove is formed in the middle of the lower end of the upper clamping head, a plurality of teeth B corresponding to the teeth A are arranged inwards of the upper clamping head, and long grooves are formed in the middle of the teeth B; a rack seat fixing hole is formed in the inner side close to the end part of the arc-shaped holding section B, and a threaded hole is formed in the rack seat fixing hole; the joint of the clamping section B and the arc-shaped holding section B is of a hinge change structure; the length of the clamping section A is set to be 15cm or 20cm longer than that of the clamping end B.
Preferably, the tooth nails and the tooth Bs correspond in position and are the same in size.
Preferably, vertical flat notches are cut between the upper clamping section A and the arc-shaped holding section A of the upper clamp piece and between the upper clamping section B and the arc-shaped holding section B of the lower clamp piece.
Preferably, the inner side of the lower clamping head is provided with an inclined plane forming an included angle of 145 degrees with the bottom surface of the clamping groove, and the inclined plane is provided with a transverse thin rack.
Preferably, the device further comprises a locking device; the locking device comprises a rack, a rack seat and an elastic sheet, wherein the rack seat is connected with the rack seat fixing hole, a tooth groove matched with the clamping tooth is formed in the rack, the upper end of the rack is located in a connecting groove in the middle of the rack seat and connected with the connecting groove through a shaft pin, one end of the elastic sheet is connected with the threaded hole through a screw, and the other end of the elastic sheet is located at the bottom of the connecting groove of the rack seat and compressed with the bottom end of the rack connecting end.
The utility model has the beneficial effects that: the utility model relates to a reduction forceps for treating acetabular posterior column fracture, which comprises an upper forceps sheet, a lower forceps sheet, a locking device and a hinge change structure; the middle parts of the upper and lower clamp pieces are hinged through a hinge change structure; the upper and lower clamp pieces are mutually matched to adapt to the reduction of fracture lines with different lengths for complex unstable acetabulum fracture; the locking device locks the matched upper and lower clamp pieces; the hinge change structure is provided with a hinge shaft and a change groove; the middle of the change groove can slide the hinge shaft to change the position of the hinge shaft, two ends of the change groove can lock the hinge shaft with the top of the hinge shaft and the bottom of the change groove in different directions, and the hinge shaft with the top of the hinge shaft and the bottom of the change groove in the same direction is released; the hinged shaft can be twisted to change the direction of the top of the hinged shaft; the utility model not only can adapt to the reduction of fracture lines with different lengths for complicated unstable acetabulum fractures, but also can change the hinging positions of the upper and lower clamp pieces through the hinging change structure, and has simple structure and convenient use.
Drawings
FIG. 1 is a first schematic structural view of reduction forceps for acetabular posterior column fracture treatment according to the utility model;
FIG. 2 is an enlarged view I of FIG. 1;
FIG. 3 is an enlarged view II of FIG. 1;
FIG. 4 is an enlarged view III of FIG. 1;
FIG. 5 is a cross-sectional view A-A of FIG. 1;
FIG. 6 is a second structural schematic view of the reduction forceps for acetabular posterior column fracture treatment according to the utility model;
FIG. 7 is a cross-sectional view B-B of FIG. 6;
FIG. 8 is a view in the direction C of FIG. 6;
FIG. 9 is a schematic structural view of the upper clamp plate;
fig. 10 is a schematic structural view of a hinge shaft;
in the figure: 1. the nail clipper comprises a clamping section A, a clamping section B, an arc-shaped holding section A, a hook-shaped fixed end 3, a lower clamping head 5, a tooth nail 6, a tooth clamp 7, a clamping tooth 8, a clamping section B, an arc-shaped holding section B9, an upper clamping head 10, a reset nail clamping groove 11, a tooth nail clamping groove 12, a tooth nail B13, a long groove 14, a rack seat fixing hole 14, a threaded hole 15, a rack 18, a rack seat 19, a rack seat 20, an elastic sheet 21, a tooth groove 21, a thin rack 22, a vertical flat notch 23, a connecting groove 24, a hinge shaft middle part 25, a hinge shaft top 26, a groove bottom changing part 27 and a groove top changing part 28.
Detailed Description
Example (b): referring to fig. 1-8, a reduction forceps for treatment of acetabular posterior column fracture comprises an upper forceps sheet, a lower forceps sheet and a hinge change structure; the middle parts of the upper and lower clamp pieces are hinged through a hinge change structure; the upper and lower clamp pieces can rotate around the hinge change structure;
the hinge change structure comprises a hinge shaft and a change groove positioned in the middle of one of the clamp pieces; the middle part of the articulated shaft is a cylindrical section; the top of the articulated shaft is a disc cut by two symmetrical equal-length chords; the bottom of the change groove is a long hole; the long hole is matched with the middle cylindrical section of the articulated shaft; the top of the change groove is provided with round step holes matched with the discs at the top of the articulated shaft at the two ends of the long hole; the lower end of the articulated shaft passes through the changing groove and is rotationally connected with a shaft hole in the middle of the other clamp piece; the top of the articulated shaft can rotate in a round step hole at the top of the change groove; when the top of the hinge shaft is in the same direction with the long hole at the bottom of the change groove, the top of the hinge shaft can be separated from the top of the change groove along the direction of the long hole at the bottom of the change groove, and the position is changed; when the top of the articulated shaft is in different directions with the long hole at the bottom of the change groove, the round blind hole at the bottom of the change groove restrains the top of the articulated shaft, and the position of the articulated shaft cannot be changed.
The lower clamp piece comprises a clamping section A, an arc-shaped holding section A and a hook-shaped fixed end, the clamping section A is connected with one end of the arc-shaped holding section A, the connection part is of a hinge change structure, and the other end of the arc-shaped holding section A is connected with the hook-shaped fixed end; the end part of the clamping section A is provided with a lower clamping head with an arc transition at the tip, a clamping groove is arranged inwards from the lower clamping head, the bottom of the clamping groove is provided with a plurality of transverse tooth nails, and the outer end face of the hook body of the hook-shaped fixed end is provided with a latch;
the upper clamp piece comprises a clamping section B and an arc-shaped holding section B, an upper clamping head is arranged at the end part of the clamping section B, a reset nail clamping groove is arranged in the middle of the lower end of the upper clamping head and used for fixing the reset nail clamping groove, the broken end of the fracture can be pulled, rotated and pressurized, a plurality of teeth B corresponding to the teeth A are arranged in the upper clamping head, and long grooves are formed in the middle parts of the teeth B; a rack seat fixing hole is formed in the inner side close to the end part of the arc-shaped holding section B, and a threaded hole is formed in the rack seat fixing hole; the joint of the clamping section B and the arc-shaped holding section B is of a hinge change structure; the length of the clamping section A is set to be 15cm or 20cm longer than that of the clamping end B. The two specifications can adapt to the reduction of fracture lines with different lengths.
The teeth A and the teeth B are corresponding in position and same in size, and the teeth can achieve the best biting effect due to the corresponding position.
The upper clamp piece is provided with a vertical flat notch between the upper clamping section A and the arc-shaped holding section A, and the lower clamp piece is provided with a vertical flat notch between the upper clamping section B and the arc-shaped holding section B, and the hinge change structure is also positioned at the notch and used for stably connecting the upper clamp piece and the lower clamp piece.
The inner side of the lower clamping head is provided with an inclined plane which forms an included angle of 145 degrees with the bottom surface of the clamping groove, the inclined plane can reset the joint in the closing process of the bone holding forceps, and the inclined plane is provided with a transverse serration which can enhance the holding force.
The reduction forceps for treating the acetabulum posterior column fracture further comprise a locking device; the locking device comprises a rack, a rack seat and an elastic sheet, wherein the rack seat is connected with the rack seat fixing hole, a tooth groove matched with the clamping teeth is formed in the rack, the upper end of the rack is located in a connecting groove in the middle of the rack seat and is connected with the connecting groove through a shaft pin, one end of the elastic sheet is connected with the threaded hole through a screw, the other end of the elastic sheet is located at the bottom of the connecting groove of the rack seat and is pressed against the bottom end of the rack connecting end, and the rack can be fixed through the elastic force of the elastic sheet after the tooth groove and the clamping teeth are connected so as to avoid falling.
The using process of the utility model is as follows: during the use, the clamping head of the upper clamp piece of the reduction clamp is placed at the stable end of the acetabulum fracture part, the clamping head of the lower clamp piece of the reduction clamp is placed at the movable end of the fracture part, then the arc-shaped holding section of the reduction clamp is forcefully held to tension the movable end of the acetabulum fracture part to the stable end of the fracture part, when the movable end and the stable end of the acetabulum fracture part are tightly attached, the rack of the locking device is connected with the clamping teeth, the fixation of the reduction clamp is realized, and finally, the reduction nail and the reduction steel plate are additionally arranged at the acetabulum fracture part.
The hinge change process of the utility model: when the hinged position of the upper and lower clamp pieces needs to be changed, the top of the hinged shaft is enabled to be consistent with the direction of the long hole at the bottom of the change groove only by slightly twisting the hinged shaft, and then the top of the hinged shaft is enabled to be staggered along the direction of the long hole at the bottom of the change groove, so that the top of the hinged shaft is enabled to be changed into a blind hole at the top of the other change groove; and the top of the articulated shaft is slightly twisted to deviate from the direction of the long hole at the bottom of the change groove, so that the articulated shaft is locked by the blind hole at the top of the change groove and cannot move along the direction of the long hole at the bottom of the change groove, and the occluded stroke of the upper clamp piece and the lower clamp piece is changed.
Claims (6)
1. A reduction forceps for treating acetabular posterior column fracture comprises an upper forceps sheet, a lower forceps sheet and a hinge change structure; the middle parts of the upper and lower clamp pieces are hinged through a hinge change structure; the structure is characterized in that the hinge change structure comprises a hinge shaft and a change groove positioned in the middle of one of the clamp sheets; the middle part of the articulated shaft is a cylindrical section; the top of the articulated shaft is a disc cut by two symmetrical equal-length chords, and the diameter of the disc is larger than that of the cylindrical section; the bottom of the change groove is a long hole; the long hole is matched with the middle cylindrical section of the articulated shaft; the top of the change groove is provided with circular step holes matched with the circular discs at the top of the articulated shaft at the two ends of the long hole, and the lower end of the articulated shaft passes through the change groove to be rotatably connected with the shaft hole at the middle part of the other clamp piece.
2. The reduction forceps for treatment of a posterior acetabular column fracture according to claim 1, wherein: the lower clamp piece comprises a clamping section A, an arc-shaped holding section A and a hook-shaped fixed end, the clamping section A is connected with one end of the arc-shaped holding section A, the connection part is of a hinge change structure, and the other end of the arc-shaped holding section A is connected with the hook-shaped fixed end; the end part of the clamping section A is provided with a lower clamping head with an arc transition at the tip end, a clamping groove is arranged inwards from the lower clamping head, the bottom of the clamping groove is transversely provided with a plurality of tooth nails, and the outer end face of the hook body of the hook-shaped fixed end is provided with a latch;
the upper clamp piece comprises a clamping section B and an arc-shaped holding section B, an upper clamping head is arranged at the end part of the clamping section B, a reset nail clamping groove is arranged in the middle of the lower end of the upper clamping head, a plurality of teeth B corresponding to the teeth A are arranged in the upper clamping head, and long grooves are formed in the middle of the teeth B; a rack seat fixing hole is formed in the inner side close to the end part of the arc-shaped holding section B, and a threaded hole is formed in the rack seat fixing hole; the joint of the clamping section B and the arc-shaped holding section B is of a hinge change structure; the length of the clamping section A is set to be 15cm or 20cm longer than that of the clamping end B.
3. The reduction forceps for acetabular posterior column fracture treatment of claim 2, wherein: the tooth nails and the tooth B are corresponding in position and same in size.
4. The reduction forceps for treatment of acetabular posterior column fracture according to claim 2, wherein: vertical flat notches are cut between the upper clamping section A and the arc-shaped holding section A of the upper clamp piece and between the upper clamping section B and the arc-shaped holding section B of the lower clamp piece.
5. The reduction forceps for treatment of acetabular posterior column fracture according to claim 2, wherein: the inner side of the lower clamping head is provided with an inclined plane forming an included angle of 145 degrees with the bottom surface of the clamping groove, and the inclined plane is provided with a transverse thin rack.
6. The reduction forceps for treatment of acetabular posterior column fracture according to claim 2, wherein: the device also comprises a locking device; the locking device comprises a rack, a rack seat and an elastic sheet, wherein the rack seat is connected with the rack seat fixing hole, a tooth groove matched with the clamping tooth is formed in the rack, the upper end of the rack is located in a connecting groove in the middle of the rack seat and connected with the connecting groove through a shaft pin, one end of the elastic sheet is connected with the threaded hole through a screw, and the other end of the elastic sheet is located at the bottom of the connecting groove of the rack seat and tightly pressed with the bottom end of the rack connecting end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120799888.5U CN216652430U (en) | 2021-04-19 | 2021-04-19 | Reduction forceps for treatment of acetabular posterior column fracture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120799888.5U CN216652430U (en) | 2021-04-19 | 2021-04-19 | Reduction forceps for treatment of acetabular posterior column fracture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216652430U true CN216652430U (en) | 2022-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120799888.5U Active CN216652430U (en) | 2021-04-19 | 2021-04-19 | Reduction forceps for treatment of acetabular posterior column fracture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216652430U (en) |
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2021
- 2021-04-19 CN CN202120799888.5U patent/CN216652430U/en active Active
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