Device for reduction of acetabular quadrilateral fracture and auxiliary internal fixation implantation
By designing a device for reducing the quadrilateral fracture of the acetabular quadrilateral fracture, the combination of forceps and auxiliary positioners solves the problem of difficulty in maintaining the reset state and difficulty in internal fixation, and achieves stable reset and efficient internal fixation, ensuring the safety of the surgery.
Patent Information
- Application Number
- CN202411168861.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-02-25
AI Technical Summary
The prior art has problems such as difficulty in maintaining the reduction state, high risk of damage to peripheral tissues, and high difficulty in internal fixation during the reduction and internal fixation of acetabular quadrilateral fractures.
A device is designed including a hinged joint formation of the first and second pliers arm. Through the clamping part and positioning part of the first and second pliers heads, the auxiliary positioning member can achieve stable reduction of the fracture end and precise fixation of the K-S-N-N-N-N-N-N-N-N-N-N-N-N-N-N-N-N-N-N-N-N-N-N-N-N-N-N-N-N-N-N-N-
The device can effectively maintain the reset state, reduce damage to peripheral vascular neural tissue, improve the stability and efficiency of internal fixation, and ensure the safety of surgery.
Smart Images
Figure CN119498943A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of medical devices, and in particular to a device for acetabular quadrilateral fracture reduction and auxiliary internal fixation placement. Background Art
[0002] Acetabular fracture is a common, complex, and severe trauma in clinical practice. Due to its complex anatomical location and high surgical difficulty, it is known as the crown of trauma orthopedics. Most acetabular fractures are accompanied by quadrilateral fractures, which lead to varying degrees of central dislocation of the femoral head. Therefore, effective reduction and internal fixation including quadrilateral fixation after acetabular fracture plays a vital role in the recovery of hip joint function.
[0003] At present, most surgeons who reduce acetabular quadrilateral fractures use periosteal strippers to lift and squeeze, or use existing high and low clamps for reduction. However, these methods have the following problems: when using periosteal strippers to lift and squeeze, it is impossible to effectively maintain the reduction state and maintain sufficient strength during the operation; when the larger long end of the high and low clamps is inserted into the posterior edge of the quadrilateral (the lower edge of the greater sciatic foramen), it is easy to damage blood vessels, nerves and other tissues; the low clamp of the high and low clamp is placed at the anterior superior iliac spine, and the pressure line is significantly oblique to the quadrilateral fracture line, so it is impossible to effectively apply pressure; after the quadrilateral is reduced, due to the thin anatomy of the middle wall, temporary or screw fixation after reduction is difficult; currently, Kirschner wires are mostly used for temporary fixation in clinical practice, but it is not easy to insert the Kirschner wires into the thin bones on both sides of the fracture when inserting them. Multiple inaccurate insertions will damage the limited thin cortex of the wall, thus failing to effectively maintain stable temporary fixation; sometimes even the femoral head is inserted, causing secondary injuries of varying degrees.
[0004] Therefore, there is an urgent need for a device for reducing acetabular quadrilateral fractures and assisting in internal fixation placement. Summary of the invention
[0005] The purpose of the present invention is to provide a device for acetabular quadrilateral fracture reduction and auxiliary internal fixation placement in view of the deficiencies in the prior art.
[0006] To achieve the above object, the technical solution adopted by the present invention is:
[0007] Provided is a device for acetabular quadrilateral fracture reduction and auxiliary internal fixation placement, comprising: a main body formed by hingedly connecting a first clamp arm and a second clamp arm; wherein,
[0008] The first clamp arm comprises: a first clamp handle arranged at the proximal end of the first clamp arm, and a first clamp head arranged at the distal end of the first clamp arm;
[0009] The first clamp head is provided with a first through slot extending through the first clamp head in a thickness direction thereof;
[0010] The second clamp arm comprises: a second clamp handle arranged at the proximal end of the second clamp arm, and a second clamp head arranged at the distal end of the second clamp arm;
[0011] The length of the second clamp head is smaller than that of the first clamp head, the distal end of the second clamp head is bent toward a side close to the first clamp head to form a second positioning portion, and the distal end of the second positioning portion is bent toward a side close to the first clamp head to form a second clamping portion;
[0012] The second positioning portion is provided with a second through slot extending through the second positioning portion in a thickness direction thereof, and an auxiliary positioning piece is fixedly provided on a side of the second positioning portion away from the first clamp head, wherein the setting position of the auxiliary positioning piece matches the opening position of the second through slot;
[0013] Wherein, the auxiliary positioning member comprises: a slide rail fixedly arranged on the side wall of the second positioning portion, and a slider slidably arranged on the slide rail;
[0014] Wherein, the slider is provided with a positioning groove along the thickness direction of the slider, and the cross-sectional shape of the positioning groove matches the cross-sectional shape of the Kirschner wire;
[0015] When the sliding block is located at the proximal end of the sliding rail, the axial direction of the positioning groove is parallel to the axial direction of the second through groove;
[0016] When the sliding block is located at the distal end of the sliding rail, a first angle is formed between the axial direction of the positioning groove and the axial direction of the second through groove, and the first angle is an acute angle.
[0017] Preferably, the distal end of the first clamp head is bent toward a side close to the second clamp head to form a first clamping portion, and the distal end of the first through slot extends to the middle of the first clamping portion.
[0018] Preferably, the first pliers arm further comprises: a first latching tooth fixedly arranged on a side of the first pliers handle close to the second pliers handle; the second pliers arm further comprises: a second latching tooth fixedly arranged on a side of the second pliers handle close to the first pliers handle, and the second latching tooth matches the first latching tooth.
[0019] Preferably, the first clamp arm further comprises: a first holding ring fixedly disposed at the proximal end of the first clamp handle.
[0020] Preferably, the second clamp arm further comprises: a second holding ring fixedly disposed at the proximal end of the second clamp handle.
[0021] Preferably, the slide rail is arranged in an arc shape, the slide rail extends along the length direction of the second positioning portion, and the distal end of the slide rail is closer to the second positioning portion than the proximal end of the slide rail.
[0022] Preferably, the auxiliary positioning member further comprises: a limiting nut; wherein,
[0023] Both sides of the sliding block penetrate the sliding rail, and a portion of the sliding block extending outside the sliding rail is formed with a plurality of limiting parts, and the limiting parts are threadably matched with the limiting nut.
[0024] The present invention adopts the above technical solution, and has the following technical effects compared with the prior art:
[0025] The device for acetabular quadrilateral fracture reduction and auxiliary internal fixation placement of the present invention meets the characteristics of the operator's operation and quadrilateral anatomy, does not irritate the blood vessels and nerve tissues around the quadrilateral, does not cause secondary damage to the surrounding tissues, ensures the safety of the operation, and has important clinical application value. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a structural schematic diagram of the device in the present invention;
[0027] Figure 2 It is a structural schematic diagram of the auxiliary positioning member in the present invention;
[0028] The reference numerals include:
[0029] The first clamp arm 1; the first clamp handle 11; the first clamp head 12; the first clamp portion 121; the first through slot 122; the first locking tooth 13; the first holding ring 14; the second clamp arm 2; the second clamp handle 21; the second clamp head 22; the second positioning portion 221; the slide rail 2211; the slider 2212; the positioning slot 22121; the second clamp portion 222; the second locking tooth 23; the second holding ring 24. DETAILED DESCRIPTION
[0030] The specific embodiments of the present invention will be described in detail below.
[0031] Unless otherwise defined, technical or scientific terms used in the claims and the specification shall have the common meanings understood by persons having ordinary skills in the technical field to which the present invention belongs.
[0032] The words "include" or similar words used in the patent application specification and claims of the present invention mean that the items appearing before "include" include the items listed after "include" or their equivalents, and do not exclude other items.
[0033] The numerical values mentioned in the present invention include all numerical values that increase from low to high by one unit, assuming that there are at least two units between any lower value and the higher value. For example, if a component or a physical quantity is said to be from 1 to 100, 10 to 90 is more preferred, and 20 to 80 is the most preferred, it is intended to express that values such as 5 to 95, 14 to 76, 23 to 67, 32 to 58, 41 to 49 are clearly listed in this specification; for values less than 1, 0.0001, 0.001, 0.01 or 0.1 are considered to be more suitable as a unit. The above examples are for illustrative purposes only. In fact, all numerical combinations between the lowest value and the highest value listed are deemed to be clearly listed in this specification in a similar manner.
[0034] Example 1
[0035] like Figure 1 As shown, this embodiment provides a device for acetabular quadrilateral fracture reduction and auxiliary internal fixation placement, comprising: a main body formed by hingedly connecting a first clamp arm 1 and a second clamp arm 2; wherein,
[0036] The first clamp arm 1 comprises: a first clamp handle 11 disposed at the proximal end of the first clamp arm 1, a first clamp head 12 disposed at the distal end of the first clamp arm 1, a first clamp tooth 13 fixedly disposed on a side of the first clamp handle 12 close to the second clamp handle 22, and a first holding ring 14 fixedly disposed at the proximal end of the first clamp handle 12;
[0037] The distal end of the first clamp head 12 is bent toward a side close to the second clamp head 22 to form a first clamping portion 121; the first clamp head 12 is provided with a first through slot 122 penetrating along the thickness direction of the first clamp head 12, and the distal end of the first through slot 122 extends to the middle of the first clamping portion 121;
[0038] The second clamp arm 2 comprises: a second clamp handle 21 arranged at the proximal end of the second clamp arm 2, a second clamp head 22 arranged at the distal end of the second clamp arm 2, a second clamp tooth 23 fixedly arranged at a side of the second clamp handle 22 close to the first clamp handle 12, and a second holding ring 24 fixedly arranged at the proximal end of the second clamp handle 22;
[0039] The length of the second clamp head 22 is less than that of the first clamp head 12, the distal end of the second clamp head 22 is bent toward the side close to the first clamp head 21 to form a second positioning portion 221, and the distal end of the second positioning portion 221 is bent toward the side close to the first clamp head 21 to form a second clamping portion 222; the second clamping tooth 23 matches the first clamping tooth 13;
[0040] The second positioning portion 221 is provided with a second through slot along the thickness direction of the second positioning portion 221; an auxiliary positioning piece is fixedly provided on a side of the second positioning portion 221 away from the first clamp head 12, and the setting position of the auxiliary positioning piece matches the opening position of the second through slot;
[0041] like Figure 2 As shown, the auxiliary positioning member includes: a slide rail 2211 fixedly arranged on the side wall of the second positioning portion 221, a slider 2212 slidably arranged on the slide rail 2211, and a limiting nut;
[0042] The slide rail 2211 is arranged in an arc shape, and the slide rail 2211 extends along the length direction of the second positioning portion 221, and the distal end of the slide rail 2211 is closer to the second positioning portion 221 than the proximal end of the slide rail 2211; the slider 2212 is provided with a positioning groove 22121 along the thickness direction of the slider 2212, and the cross-sectional shape of the positioning groove 22121 matches the cross-sectional shape of the Kirschner wire, and the two sides of the slider 2212 pass through the slide rail 2211, and the part of the slider 2212 extending outside the slide rail 2211 is formed with a plurality of limiting portions, and the limiting portions are threadedly matched with the limiting nut; therefore,
[0043] When the sliding block 2212 is located at the proximal end of the sliding rail 2211, the axial direction of the positioning groove 22121 is parallel to the axial direction of the second through groove;
[0044] When the sliding block 2212 is located at the distal end of the sliding rail 2211 , a first angle is formed between the axial direction of the positioning groove 22121 and the axial direction of the second through groove, and the first angle is an acute angle.
[0045] When in use, the first clamping part 121 is placed inside the quadrilateral (lower edge of the greater sciatic foramen), that is, below the fracture end, and the second clamping part 222 is placed on the anterior column of the pelvis. When the thigh is pulled and the femoral head does not press against the quadrilateral, the fracture end is squeezed through the device, and with the cooperation of other instruments, the fracture is anatomically reduced and then pressurized, thereby eliminating the fracture gap and completing the fracture reduction.
[0046] While the fracture reduction is effectively maintained, adjust the relative position of the slider 2212 and the slide rail 2211, that is, the angle between the axial direction of the positioning groove 22121 and the axial direction of the second through groove, screw the limit nut inward to limit the sliding of the slider 2212, and insert the Kirschner wire from the positioning groove 22121, pass through the second through groove and the fracture end in turn, and then come out from the first through groove 122, thereby achieving temporary Kirschner wire fixation of the acetabular quadrilateral fracture, greatly improving the surgical efficiency and reducing the operation time.
[0047] In summary, the device for acetabular quadrilateral fracture reduction and auxiliary internal fixation placement of the present invention conforms to the characteristics of the operator's operation and quadrilateral anatomy, does not irritate the vascular and nerve tissues around the quadrilateral, does not cause secondary damage to the surrounding tissues, ensures the safety of the operation, and has important clinical application value.
[0048] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.
Claims
1. A device for acetabular quadrilateral fracture reduction and auxiliary internal fixation placement, characterized in that: include: The main body is formed by hingedly connecting a first clamp arm (1) and a second clamp arm (2); wherein: The first clamp arm (1) comprises: a first clamp handle (11) arranged at the proximal end of the first clamp arm (1), and a first clamp head (12) arranged at the distal end of the first clamp arm (1); The first clamp head (12) is provided with a first through slot (122) extending through the first clamp head (12) in a thickness direction thereof; The second clamp arm (2) comprises: a second clamp handle (21) arranged at the proximal end of the second clamp arm (2), and a second clamp head (22) arranged at the distal end of the second clamp arm (2); The length of the second clamp head (22) is smaller than the length of the first clamp head (12); the distal end of the second clamp head (22) is bent toward a side close to the first clamp head (21) to form a second positioning portion (221); and the distal end of the second positioning portion (221) is bent toward a side close to the first clamp head (21) to form a second clamping portion (222); The second positioning portion (221) is provided with a second through slot extending through the second positioning portion (221) in a thickness direction thereof, and an auxiliary positioning piece is fixedly provided on a side of the second positioning portion (221) away from the first clamp head (12), wherein the setting position of the auxiliary positioning piece matches the opening position of the second through slot; Wherein, the auxiliary positioning member comprises: a slide rail (2211) fixedly arranged on the side wall of the second positioning portion (221), and a slider (2212) slidably arranged on the slide rail (2211); The slider (2212) is provided with a positioning groove (22121) along the thickness direction of the slider (2212), and the cross-sectional shape of the positioning groove (22121) matches the cross-sectional shape of the Kirschner wire; When the sliding block (2212) is located at the proximal end of the sliding rail (2211), the axial direction of the positioning groove (22121) is parallel to the axial direction of the second through groove; When the sliding block (2212) is located at the distal end of the sliding rail (2211), a first angle is formed between the axial direction of the positioning groove (22121) and the axial direction of the second through groove, and the first angle is an acute angle.
2. The device according to claim 1, characterized in that The distal end of the first clamp head (12) is bent toward a side close to the second clamp head (22) to form a first clamping portion (121), and the distal end of the first through slot (122) extends to the middle of the first clamping portion (121).
3. The device according to claim 1, characterized in that The first clamp arm (1) further comprises: a first latching tooth (13) fixedly arranged on a side of the first clamp handle (12) close to the second clamp handle (22); the second clamp arm (2) further comprises: a second latching tooth (23) fixedly arranged on a side of the second clamp handle (22) close to the first clamp handle (12), the second latching tooth (23) matching the first latching tooth (13).
4. The device according to claim 1, characterized in that The first clamp arm (1) further comprises: a first holding ring (14) fixedly arranged at the proximal end of the first clamp handle (12).
5. The device according to claim 1, characterized in that The second clamp arm (2) also includes a second holding ring (24) fixedly arranged at the proximal end of the second clamp handle (22).
6. The device according to claim 1, characterized in that The slide rail (2211) is arranged in an arc shape, and the slide rail (2211) extends along the length direction of the second positioning portion (221), and the distal end of the slide rail (2211) is closer to the second positioning portion (221) than the proximal end of the slide rail (2211).
7. The device according to claim 1, characterized in that The auxiliary positioning member also includes: a limiting nut; wherein, Both sides of the slider (2212) are arranged to penetrate the slide rail (2211), and the portion of the slider (2212) extending outside the slide rail (2211) is formed with a plurality of limiting parts, and the limiting parts are threadedly matched with the limiting nut.