A pelvic fracture reducer

Abstract

The present invention discloses a pelvic fracture reducer, comprising: a base, the bottom surface of the base is in an arc shape that can fit with the lower edge of the sacroiliac joint, at least two installation through holes are provided on the base, at least three guide through holes are provided on the base, a guide tube is hinged on the base, and a lifting rod that can pass through the guide tube is provided, a threaded section is provided on the lifting rod, a nut is threadedly connected on the threaded section, after the lifting rod is inserted into the guide tube, it can be screwed into the guide tube through the nut on it to abut against the upper end of the guide tube and continue to be screwed in for lifting, a fixing plate is provided on the bottom end of the lifting rod, and at least one fixing hole is provided on the fixing plate. The above-mentioned reducer can quickly and reliably lift and reduce the ischial ramus fracture part, and after the reduction is completed, the reducer can also guide the Kirschner wire so that the Kirschner wire can pass through the ischial ramus body and be inserted into the ischial ramus fracture part, so that the reduced ischial ramus fracture part can be temporarily fixed to the ischial ramus body.

Description

Technical Field

[0001] The invention relates to the field of medical instruments, and in particular to a pelvic fracture reducer for reducing a sciatic ramus fracture. Background Art

[0002] Pelvic fracture is a trauma caused by violent compression. This injury is commonly caused by traffic accidents or accidental collapse. Since the pelvis is an anatomical structure composed of various types of bones, external force impacts of different directions and strengths will not only affect the severity of pelvic fractures, but also cause different types of fractures due to fractures or dislocations of bones in different parts, including sciatic rami fractures. Because the sciatic rami is located in a relatively deep position in the pelvis, the operating space for reducing the sciatic rami fracture is small, making it difficult to reduce the sciatic rami fracture. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a pelvic fracture reducer which can quickly and reliably reduce the sciatic ramus fracture.

[0004] In order to solve the above problems, the technical solution adopted by the present invention is: a pelvic fracture reducer, characterized in that: it includes: a base, the bottom surface of the base is arranged in an arc shape that can fit with the lower edge of the sacroiliac joint, so that the base can be placed on the lower edge of the sacroiliac joint, at least two mounting through holes are arranged on the base for fixing the base on the lower edge of the sacroiliac joint, and at least three guide through holes are arranged on the base that can respectively face the distal end of the ischial branch when the base is fixed to the lower edge of the sacroiliac joint. A guide tube that can swing left and right and can face the ischium when the base is fixed to the lower edge of the sacroiliac joint is hinged on one side of the base, and a guide tube that can pass through is also provided. A lifting rod of the guide tube, the guide tube can guide the inserted lifting rod, a threaded section is provided on the lifting rod, a nut for abutting against the upper end of the guide tube is threadedly connected on the threaded section of the lifting rod, after the lifting rod is inserted into the guide tube, the nut on it can be screwed into it until it abuts against the upper end of the guide tube and continues to be screwed in for lifting, a fixing plate is provided on the bottom end of the lifting rod, and at least one fixing hole is provided on the fixing plate for fixing the fixing plate to the ischial ramus fracture part, after the lifting rod is inserted toward the ischium under the guidance of the guide tube, the fixing plate on it can be moved to the distal end of the ischial ramus fracture line, so that the fixing plate can be close to the ischial ramus fracture part.

[0005] Furthermore, in the aforementioned pelvic fracture reducer, the maximum angle at which the guide tube swings to the left or to the right is 10°.

[0006] Furthermore, in the aforementioned pelvic fracture reducer, the diameter of the mounting through hole is φ2.0 mm, the diameter of the guide through hole is φ2.5 mm, and the diameter of the fixing hole is φ3.5 mm.

[0007] Furthermore, in the aforementioned pelvic fracture reducer, a boss is provided on the upper surface of the base, and all the guide through holes are provided on the boss.

[0008] Furthermore, in the aforementioned pelvic fracture reducer, the fixing plate is a long strip plate, and the length of the long strip plate is 4 to 7 cm.

[0009] Furthermore, in the aforementioned pelvic fracture reducer, there are two mounting through holes, two fixing holes, and four guide through holes.

[0010] The advantages of the present invention are: the pelvic fracture reducer described in the present invention can quickly and reliably lift and reduce the ischial ramus fracture part. After the reduction is completed, the reducer can also guide the Kirschner wire so that the Kirschner wire can pass through the ischial ramus body and be inserted into the ischial ramus fracture part, so that the reduced ischial ramus fracture part can be temporarily fixed to the ischial ramus body, thus providing a strong condition for subsequent steel plate fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The figure is a schematic diagram of the three-dimensional structure of a pelvic fracture reducer according to the present invention. DETAILED DESCRIPTION

[0012] The present invention is further described in detail below in conjunction with specific embodiments and drawings.

[0013] like Figure 1As shown, a pelvic fracture reducer comprises: a base 1, the bottom surface of the base 1 is in an arc shape that can fit with the lower edge of the sacroiliac joint, so that the base 1 can be placed on the lower edge of the sacroiliac joint, two mounting through holes 2 for fixing the base 1 on the lower edge of the sacroiliac joint are provided on the base 1, and four guide through holes 3 that can respectively face the distal end of the ischial branch when the base 1 is fixed to the lower edge of the sacroiliac joint are also provided on the base 1. The purpose of providing multiple guide through holes 3 is to better fix the fractured part of the ischial branch after reduction; a guide tube 4 that can swing left and right and can face the ischium when the base 1 is fixed to the lower edge of the sacroiliac joint is hinged on one side of the base 1, and a guide tube 4 that can pass through the guide tube is also provided. The lifting rod 5 of the tube 4, the guide tube 4 can guide the inserted lifting rod 5, and a threaded section is provided on the lifting rod 5. A nut 6 for abutting against the upper end of the guide tube 4 is threadedly connected on the threaded section of the lifting rod 5. After the lifting rod 5 is inserted into the guide tube 4, it can be screwed into the guide tube 4 through the nut 6 thereon to abut against the upper end of the guide tube 4 and continue to be screwed in for lifting. A fixing plate 7 is provided on the bottom end of the lifting rod 5, and two fixing holes 8 for fixing the fixing plate 7 to the ischial ramus fracture part are provided on the fixing plate 7. After the lifting rod 5 is inserted toward the ischium under the guidance of the guide tube 4, the fixing plate 7 thereon can be moved to the distal end of the ischial ramus fracture line, so that the fixing plate 7 can be close to the ischial ramus fracture part.

[0014] In this embodiment, the maximum angle of the guide tube 4 to swing to the left or to the right is 10°. If the swing angle is too large, it is easy to cause harm to the injured. The diameter of the mounting through hole 2 is φ2.0mm, the diameter of the guide through hole 3 is φ2.5mm, and the diameter of the fixing hole 8 is φ3.5mm. A boss 11 is provided on the upper surface of the base 1, and all the guide through holes 3 are provided on the boss 11. This is provided to extend the guide length of the guide through hole 3 so that the guide through hole 3 can be guided more accurately. The fixing plate 7 is a long strip plate, and the length of the long strip plate 7 is 4 to 7cm, preferably 5cm.

[0015] The working process is as follows: (1) Place the base 1 snugly on the lower edge of the sacroiliac joint, and then fix the base 1 on the lower edge of the sacroiliac joint by passing two Kirschner wires through the two mounting holes 2 and inserting them into the bone; (2) Pass the lifting rod 5 through the guide tube 4, and then adjust the angle of the guide tube 4 while inserting the lifting rod 5, so that the fixing plate 7 on the lifting rod 5 moves to the distal end of the sciatic ramus fracture line, so that the fixing plate 7 is close to the sciatic ramus fracture part; (3) Pass the two Kirschner wires through the two fixing holes 8 and insert them into the sciatic ramus fracture part, so as to fix the sciatic ramus fracture part and the fixing plate 7; (4) Screw in the nut 6 to lift the lifting rod 5, so that the sciatic ramus fracture part is reset under the drive of the lifting rod 5; (5) Select a guide hole 3 with a suitable position and orientation, insert the Kirschner wire into the selected guide hole 3, and then The Kirschner wire is inserted further under the guidance of the through hole 3 until it passes through the ischial ramus body and is inserted into the ischial ramus fracture part, so that the repositioned ischial ramus fracture part can be temporarily fixed to the ischial ramus body. During the temporary fixation of the ischial ramus fracture part, it can be confirmed by scanning fluoroscopy whether the inserted Kirschner wire can reliably fix the ischial ramus fracture part. If not, it is necessary to insert the Kirschner wire through other guide through holes 3 until the ischial ramus fracture part can be reliably fixed; (6) The base 1, the lifting rod 5, and the Kirschner wire passing through the fixing hole 8 and the mounting through hole 2 are removed to leave space for the steel plate. Since the ischial ramus fracture part is temporarily fixed by the Kirschner wire, the ischial ramus fracture part will not shift after the lifting rod 5 is removed. Then, the steel plate is fixed at the ischial ramus fracture. After the steel plate is installed, the Kirschner wire used for temporary fixation is removed.

Claims

1. A pelvic fracture reducer, characterized in that: include: The base has an arc-shaped bottom surface that can fit with the lower edge of the sacroiliac joint, so that the base can be placed on the lower edge of the sacroiliac joint. At least two mounting through holes are provided on the base for fixing the base on the lower edge of the sacroiliac joint. The base is also provided with at least three guide through holes that can respectively face the distal end of the ischial ramus when the base is fixed to the lower edge of the sacroiliac joint. A guide tube that can swing left and right and can face the ischium when the base is fixed to the lower edge of the sacroiliac joint is hinged on one side of the base. A lifting rod that can pass through the guide tube is also provided, and the guide tube can guide the inserted lifting rod. A threaded section is provided on the lifting rod, and a threaded connection is provided on the threaded section of the lifting rod for engaging with the guide tube. The two ends of the lifting rod are abutted against each other. After the lifting rod is inserted into the guide tube, the nut on it can be screwed into the guide tube until it abuts against the upper end of the guide tube and then continued to be screwed in for lifting. A fixing plate is arranged on the bottom end of the lifting rod, and at least one fixing hole for fixing the fixing plate to the ischial branch fracture part is arranged on the fixing plate. After the lifting rod is inserted toward the ischium under the guidance of the guide tube, the fixing plate on it can move to the distal end of the ischial branch fracture line, so that the fixing plate can be close to the ischial branch fracture part; the diameter of the installation through hole is φ2.0mm, the diameter of the guide through hole is φ2.5mm, and the diameter of the fixing hole is φ3.5mm; a boss is arranged on the upper surface of the base, and all the guide through holes are arranged on the boss.

2. A pelvic fracture reducer according to claim 1, characterized in that: The maximum angle of the guide tube's swing to the left or right is 10°.

3. A pelvic fracture reducer according to claim 1 or 2, characterized in that: The fixing plate is a long strip plate, and the length of the long strip plate is 4 to 7 cm.

4. A pelvic fracture reducer according to claim 1 or 2, characterized in that: Two mounting through holes are provided, two fixing holes are provided, and four guide through holes are provided.

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