Device for reduction of acetabular quadrilateral fracture and auxiliary internal fixation implantation

Abstract

The utility model relates to a device for acetabular quadrilateral fracture reduction and auxiliary internal fixation imbedding. A first through groove is formed in a first tong head in the thickness direction of the first tong head in a penetrating mode. The length of the second clamp head is smaller than that of the first clamp head; a second through groove is formed in the second positioning part in the thickness direction of the second positioning part in a penetrating mode, an auxiliary positioning piece is fixedly arranged on the side, away from the first tong head, of the second positioning part, and the arrangement position of the auxiliary positioning piece is matched with the forming position of the second through groove. The auxiliary positioning piece comprises a sliding rail fixedly arranged on the side wall of the second positioning part and a sliding block arranged on the sliding rail in a sliding mode. A positioning groove is formed in the sliding block in the thickness direction of the sliding block, and the section shape of the positioning groove is matched with the cross section shape of the kirschner wire.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a device for reducing acetabular quadrilateral fractures and assisting internal fixation placement. Background Art

[0002] Acetabular fractures are common, complex, and severe injuries in clinical practice. Due to their complex anatomical location and challenging surgical procedures, they are often considered the crown of trauma orthopedics. Acetabular fractures are often accompanied by quadrilateral fractures, leading to varying degrees of central dislocation of the femoral head. Therefore, effective reduction and internal fixation, including quadrilateral fixation, plays a crucial role in restoring hip function after acetabular fractures.

[0003] Currently, most acetabular quadrilateral fracture reduction surgeons use a periosteal elevator to lift and squeeze, or existing high-low clamps for reduction. However, these methods have the following problems: Using a periosteal elevator to lift and squeeze, it is difficult to effectively maintain the reduction state and sufficient strength during surgery; the larger, long end of the high-low clamp can easily damage blood vessels and nerves when inserted into the posterior edge of the quadrilateral (the lower edge of the greater sciatic foramen); when the high-low clamp is placed at the anterior superior iliac spine, the pressure line is significantly oblique to the quadrilateral fracture line, making effective pressure ineffective; after quadrilateral reduction, the anatomy of the middle wall is thin, making temporary fixation or screw fixation difficult; currently, Kirschner wires are mostly used for temporary fixation in clinical practice, but they are difficult to insert into the thin bone on both sides of the fracture. Repeated inaccurate insertion damages the limited, thin cortex of the wall, making it impossible to effectively maintain stable temporary fixation; sometimes, the wires even penetrate the femoral head, causing varying degrees of secondary damage.

[0004] Therefore, there is an urgent need for a device for reducing acetabular quadrilateral fractures and assisting in internal fixation placement. Utility Model Content

[0005] The purpose of the utility model is to provide a device for reducing acetabular quadrilateral fractures and assisting internal fixation placement in order to address the deficiencies in the prior art.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model 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 includes: a first clamp handle provided at the proximal end of the first clamp arm, and a first clamp head provided at the distal end of the first clamp arm;

[0009] The first clamp head is provided with a first through slot extending along the thickness direction of the first clamp head;

[0010] The second pliers arm comprises: a second pliers handle provided at a proximal end of the second pliers arm, and a second pliers head provided at a distal end of the second pliers 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 the 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 the 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 member is fixedly provided on a side of the second positioning portion away from the first pliers head, wherein the setting position of the auxiliary positioning member matches the opening position of the second through-slot;

[0013] Wherein, the auxiliary positioning member includes: 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 slider is located at the proximal end of the slide 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 slide 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 provided 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 provided on a side of the second pliers handle close to the first pliers handle, the second latching tooth matches the first latching tooth.

[0019] Preferably, the first clamp arm further comprises: a first holding ring fixedly provided at the proximal end of the first clamp handle.

[0020] Preferably, the second pliers arm further comprises: a second holding ring fixedly provided at the proximal end of the second pliers handle.

[0021] Preferably, the slide rail is arranged in an arc shape, and 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 slider pass through the slide rail, and a portion of the slider extending outside the slide rail is formed with a plurality of limiting portions, which are threadably engaged with the limiting nut.

[0024] The present invention adopts the above technical solution, and compared with the prior art, has the following technical effects:

[0025] The device of the utility model for reduction and auxiliary internal fixation of acetabular quadrilateral fracture conforms to the characteristics of the surgeon's operation and quadrilateral anatomy, does not stimulate 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 diagram of the device in the utility model;

[0027] Figure 2 This is a schematic structural diagram of the auxiliary positioning member in the present utility model;

[0028] The reference numerals include:

[0029] First clamp arm 1; first clamp handle 11; first clamp head 12; first clamping portion 121; first through slot 122; first latching tooth 13; first holding ring 14; second clamp arm 2; second clamp handle 21; second clamp head 22; second positioning portion 221; slide rail 2211; slider 2212; positioning slot 22121; second clamping portion 222; second latching tooth 23; second holding ring 24. DETAILED DESCRIPTION

[0030] The specific implementation of the present utility model will be described in detail below.

[0031] Unless otherwise defined, the 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 used in the description and claims of this utility model patent application mean that the items 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 one unit to the next unit from the lowest to the highest, 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, preferably from 10 to 90, and most preferably from 20 to 80, it is intended to express that values ​​such as 5 to 95, 14 to 76, 23 to 67, 32 to 58, and 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 appropriate units. The above examples are for illustrative purposes only. In fact, all numerical combinations between the lowest value and the highest value listed are considered to be clearly listed in this specification in a similar manner. Example

[0034] 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 hinged connection of a first clamp arm 1 and a second clamp arm 2; wherein,

[0035] The first pliers arm 1 includes: a first pliers handle 11 provided at the proximal end of the first pliers arm 1, a first pliers head 12 provided at the distal end of the first pliers arm 1, a first latching tooth 13 fixedly provided on a side of the first pliers handle 11 close to the second pliers handle 21, and a first holding ring 14 fixedly provided at the proximal end of the first pliers handle 11;

[0036] The distal end of the first clamp head 12 is bent toward the 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 extending through the first clamp head 12 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;

[0037] The second pliers arm 2 includes: a second pliers handle 21 provided at the proximal end of the second pliers arm 2, a second pliers head 22 provided at the distal end of the second pliers arm 2, a second latching tooth 23 fixedly provided on a side of the second pliers handle 21 close to the first pliers handle 11, and a second holding ring 24 fixedly provided at the proximal end of the second pliers handle 21;

[0038] The length of the second clamp head 22 is smaller 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 12 to form a second positioning portion 221. The distal end of the second positioning portion 221 is bent toward the side close to the first clamp head 12 to form a second clamping portion 222. The second locking teeth 23 match the first locking teeth 13.

[0039] 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 member 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 member matches the opening position of the second through-slot;

[0040] like Figure 2 As shown, the auxiliary positioning member includes: a slide rail 2211 fixedly provided on the side wall of the second positioning portion 221, a slider 2212 slidably provided on the slide rail 2211, and a limiting nut;

[0041] 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. Both sides of the slider 2212 pass through the slide rail 2211, and the portion of the slider 2212 extending outside the slide rail 2211 is formed with a plurality of limiting portions, and the limiting portions are threadedly engaged with the limiting nut; therefore,

[0042] When the slider 2212 is located at the proximal end of the slide rail 2211 , the axial direction of the positioning groove 22121 is parallel to the axial direction of the second through groove;

[0043] When the sliding block 2212 is located at the distal end of the slide 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.

[0044] When in use, the first clamping part 121 is placed on the inner side of the quadrilateral (the 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. With the cooperation of other instruments, the fracture is anatomically reduced and then pressurized, thereby eliminating the fracture gap and completing the fracture reduction.

[0045] 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 pass out from the first through groove 122, thereby realizing temporary Kirschner wire fixation of the acetabulum quadrilateral fracture, greatly improving the surgical efficiency and reducing the operation time.

[0046] In summary, the device of the present invention for reduction and auxiliary internal fixation of acetabular quadrilateral fractures conforms to the characteristics of the surgeon'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.

[0047] The above description is only a preferred embodiment of the present invention and does not limit the implementation method 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 reducing acetabular quadrilateral fractures and assisting 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 (12) 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 (12) 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; 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 slide 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 slide 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 (11) close to the second clamp handle (21); the second clamp arm (2) further comprises: a second latching tooth (23) fixedly arranged on a side of the second clamp handle (21) close to the first clamp handle (11), 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 (11).

5. The device according to claim 1, characterized in that The second clamp arm (2) further comprises a second holding ring (24) fixedly arranged at the proximal end of the second clamp handle (21).

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 further includes: a limiting nut; wherein, Both sides of the slider (2212) are arranged to pass through 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 engaged with the limiting nut.

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