CN221105998U - Intra-articular fracture reduction device - Google Patents
Intra-articular fracture reduction device Download PDFInfo
- Publication number
- CN221105998U CN221105998U CN202322104245.6U CN202322104245U CN221105998U CN 221105998 U CN221105998 U CN 221105998U CN 202322104245 U CN202322104245 U CN 202322104245U CN 221105998 U CN221105998 U CN 221105998U
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- China
- Prior art keywords
- ejector rod
- trepan
- split
- reset
- bone
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- 230000009467 reduction Effects 0.000 title claims abstract description 31
- 208000002658 Intra-Articular Fractures Diseases 0.000 title claims abstract description 16
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 52
- 241000425571 Trepanes Species 0.000 claims abstract description 42
- 230000001054 cortical effect Effects 0.000 claims abstract description 32
- 230000004323 axial length Effects 0.000 claims abstract description 3
- 208000010392 Bone Fractures Diseases 0.000 claims description 24
- 230000009286 beneficial effect Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 210000002303 tibia Anatomy 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 208000006735 Periostitis Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 210000003423 ankle Anatomy 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 210000003460 periosteum Anatomy 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
- 210000001835 viscera Anatomy 0.000 description 1
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- Surgical Instruments (AREA)
Abstract
The utility model discloses an intra-articular fracture reduction device, which comprises a guide pin for guiding establishment of a bone path and a reduction assembly for establishing the bone path; the reset assembly comprises a hollow split ring saw and a reset ejector rod sleeved in the split ring saw and moving along the axial direction of the split ring saw; the front end of the split ring saw is provided with saw teeth for sawing cortical bone, a guide hole for a guide needle to pass through is axially formed in the reset ejector rod, and the axial length of the reset ejector rod is greater than that of the split ring saw. According to the utility model, the split trepan and the reset ejector rod are sleeved together, and the cortical bone is cut and the bone path is established by one tool, so that frequent replacement of surgical tools is not needed, and the surgical efficiency is improved; simultaneously, scales are arranged on the wall surfaces of the opening trepan and the reset ejector rod, so that the depth established by a bone canal can be measured, the effect of adjusting the annular cutting depth of cortical bone can be realized, the precision of a tool is improved, and the risk of an operation is reduced.
Description
Technical Field
The utility model belongs to the technical field of medical equipment, and particularly relates to an intra-articular fracture reduction device.
Background
Intra-articular fractures, particularly intra-articular collapsible fractures of the tibial plateau, distal tibia, often require major surgical trauma in previous treatments, resulting in long recovery times and poor recovery results. Especially, the fracture of the tibial posterior plateau and the tibial posterior ankle is difficult to show in operation, and brings great difficulty to treatment.
Clinically, most existing tools are spliced, the precision of the tools is not high enough, for example, an open circular saw has no scale, and the like, meanwhile, the tools are numerous, and the tools are often required to be replaced in the operation process, so that the operation process is complicated, the operation time is prolonged, and the like.
The application aims to solve the problem of how to quickly and effectively establish a bone tunnel to reset a fracture collapse position.
Disclosure of Invention
In order to solve the problems, the application provides an intra-articular fracture reduction device, which aims to reduce a fracture collapse position by the cooperation of a reduction assembly under the guidance of a guide pin through the positioning of the guide pin.
The technical scheme adopted for solving the technical problems is as follows:
The application provides an intra-articular fracture reduction device which comprises a guide pin for guiding establishment of a bone path and a reduction assembly for establishing the bone path;
The reset assembly comprises a hollow split ring saw and a reset ejector rod sleeved in the split ring saw and moving along the axial direction of the split ring saw;
The front end of the split trepan is provided with saw teeth for sawing cortical bone, a guide hole for a guide pin to pass through is axially formed in the reset ejector rod, the axial length of the reset ejector rod is greater than that of the split trepan, and the outer wall surface of the reset ejector rod is provided with scale marks for adjusting the annular cutting depth of cortical bone and measuring the depth of bone canal establishment;
When the cortical bone needs to be cut, the reset ejector rod extends out of the tail end of the split trepan, the front end of the split trepan protrudes out of the front end of the reset ejector rod, the split trepan is guided by the guide pin at the position where the fracture is already made, the split trepan drills into the collapsed fracture position, and the cortical bone is sawed through the saw teeth;
when the fracture needs to be reduced, the reduction ejector rod extends out of the front end of the split trepan, and the reduction ejector rod attacks the collapsed fracture to be reduced under the guide of the guide pin which has already attacked the fracture.
Furthermore, scale marks are arranged on the outer wall surface of the guide pin.
Further, scale marks are arranged on the outer wall surface of the opening trepan.
Further, an external thread is arranged on the outer wall surface of the reset ejector rod, an internal thread meshed with the external thread is arranged on the inner wall surface of the opening trepan, and the inner wall surface of the bottom of the opening trepan is provided with a smooth surface so as to be beneficial to annular cutting of cortical bones with different thicknesses.
Further, the reset ejector rod moves by 1mm in the axial direction of the split ring saw after each rotation.
Further, the length of the opening trephine is larger than that of the guide pin.
The beneficial effects brought by the utility model are as follows:
The application provides an intra-articular fracture reduction device, which is positioned through a guide pin at first and then is used in a matched mode through a reduction assembly under the guidance of the guide pin so as to establish a bone canal to reduce a fracture collapse position. The open trepan and the reset ejector rod are sleeved together, and cortical bone is cut and a bone path is established through one tool, so that frequent replacement of surgical tools is not needed, and the efficiency of surgery is improved; simultaneously, scales are arranged on the wall surfaces of the opening trepan and the reset ejector rod, so that the depth established by a bone canal can be measured, the effect of adjusting the annular cutting depth of cortical bone can be realized, the precision of a tool is improved, and the risk of an operation is reduced.
Drawings
The utility model will be further described with reference to the accompanying drawings and specific examples,
FIG. 1 is a schematic view of a guide pin according to the present application;
FIG. 2 is a schematic view of a split ring saw according to the present application;
FIG. 3 is a schematic view of the reset jack of the present application;
FIG. 4 is a schematic diagram of a reset assembly according to the present application;
fig. 5 is a schematic diagram of a reset device according to a second embodiment of the present application.
Wherein, 1, a guide pin; 2. a split ring saw; 21. saw teeth; 22. an internal thread; 23. a smooth surface; 3. resetting the ejector rod; 31. a guide hole; 32. and (5) external threads.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-5, the present embodiment provides an intra-articular fracture reduction device comprising a guide pin for guiding the creation of a bone tunnel, and a reduction assembly for creating a bone tunnel.
The outer wall surface of the guide pin is provided with scale marks, the scale of the guide pin gradually increases from the front end (the left end in fig. 1) to the tail end (the right end in fig. 1) so as to be beneficial to measuring the depth of a bone canal, the length of the guide pin is 200mm, and the diameter of the guide pin is 2.5mm.
The reset assembly comprises a hollow split ring saw with two open ends and a reset ejector rod sleeved in the split ring saw. The reset ejector rod can move along the length direction (axial direction) of the split trepan. The length of the reset ejector rod is greater than that of the split ring saw, the split ring saw is 200mm in length, the outer diameter of the split ring saw is 15-30 mm, and the split ring saw can be set to various specifications, namely, one specification is set every 5 mm. The length of the reset ejector rod is 300mm.
The front end (left end in fig. 2) of the split trepan is provided with saw teeth for sawing cortical bone. The outer wall surface of the opening trepan is provided with scale marks matched with scales of the guide pins so as to be beneficial to measuring the depth of the drilled bone canal.
And a guide hole for the guide needle to pass through is formed in the reset ejector rod along the length direction, and the diameter of the guide hole is matched with the diameter of the guide needle. The outer wall surface of the reset ejector rod is provided with scale marks, the scales of which gradually increase from the front end to the tail end of the reset ejector rod are used for adjusting the annular cutting depth of cortical bone and measuring the depth of bone canal establishment.
The outer wall surface of the reset ejector rod is provided with external threads, the inner wall surface of the opening trepan is provided with internal threads meshed with the external threads, and the reset ejector rod moves by 1mm in the length direction of the opening trepan when rotating for each circle. The friction force between the internal thread and the external thread is large enough, so that when the open circular saw is rotated, the reset ejector rod and the open circular saw cannot move relatively. The inner wall surface of 5mm at the bottom end of the split trepan is set to be a smooth surface, namely, the inner wall surface at the bottom of the split trepan is not provided with internal threads, and the smooth surface is more beneficial to annular cutting of cortical bone with thickness, so that obstruction to cutting of cortical bone caused by the internal threads is prevented.
When the front end of the open trepan is flush with the front end of the reset ejector rod, the depth of the sawtooth cut cortical bone is 0mm, the reset ejector rod rotates to enable the sawtooth cut cortical bone to extend outwards from the tail end of the open trepan for a certain distance, namely, the distance between the front end of the open trepan and the front end of the reset ejector rod, the front end of the open trepan protrudes from the distance between the front end of the reset ejector rod, the extending distance is the annular cutting depth of the cortical bone, and the annular cutting depth of the cortical bone can be preset by adjusting the reset ejector rod before sawtooth operation, and can also be adjusted in the operation process. When the fracture ring saw is used, the front end of the opening ring saw drills into the collapsed fracture position, the saw teeth are rotated to saw the cortical bone, at the moment, relative movement is not generated between the reset ejector rod and the opening ring saw under the action of the internal and external threads, the annular cutting depth of the cortical bone can be observed through scales on the outer wall surface of the opening ring saw, and the annular cutting depth of the cortical bone can be determined through the distance adjusted by the reset ejector rod, so that double guarantee is realized, the corresponding distance can be correspondingly adjusted according to the thickness of the cortical bone of patients at different age, the cutting is realized as much as possible, the cutting is not continuous due to the cutting shallowness, and other functional disorders of the patients caused by touching surrounding tissues such as blood vessels, internal organs and nerves due to the cutting depth are not generated.
Referring to fig. 4, when it is necessary to cut the cortical bone, the reduction ejector rod extends out of the tail end (right end in fig. 2) of the split trepan, the reduction ejector rod is rotated to preset the depth of the split trepan to cut the cortical bone, the reduction assembly is sleeved outside the guide pin at the position where the fracture is already cut through the guide hole, and the split trepan drills into the collapsed fracture position under the guide of the guide pin, and the cortical bone is sawed through the saw teeth.
Referring to fig. 5, when the fracture needs to be reduced, the reduction ejector rod extends out of the front end of the split trepan, the reduction assembly is sleeved outside the guide pin at the position where the fracture is already tapped through the guide hole, and the reduction ejector rod taps into the collapsed fracture for reduction under the guidance of the guide pin.
The operation process of the intra-articular fracture reduction device in practical application is as follows:
S1: after the patient is anesthetized, a conventional disinfection drape is adopted, a lying position is adopted, the position which needs to be reached is displayed according to the perspective positioning of a C-arm machine, a small incision of about 2cm is formed in the cortex outside the fracture, the periosteum is stripped, and the cortex outside the tibia is exposed. 1 guide needle is tapped from the incision, and the Kirschner wire is tapped into a designated position according to preoperative planning and perspective conditions in the operation.
S2: the reset ejector rod stretches out of the tail end of the split trepan, the reset ejector rod is rotated to preset the depth of the split trepan for cutting the cortical bone, the reset assembly is sleeved outside the guide pin in the step S1 through the guide hole, and the split trepan drills into the collapsed fracture under the guide of the guide pin, and the cortical bone is sawed through the saw teeth.
S3: taking out the reset component in the step S2, extending the reset ejector rod out of the front end of the split trepan, sleeving the reset component outside the guide pin in the step S1 through the guide hole, under the guidance of the guide pin, tapping the reset ejector rod into the collapsed fracture for resetting, and measuring the length of the tapped bone tunnel through the scales of the reset ejector rod.
It should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.
Claims (6)
1. An intra-articular fracture reduction device, characterized in that: comprises a guide pin for guiding establishment of a bone canal and a reset component for establishing the bone canal;
The reset assembly comprises a hollow split ring saw and a reset ejector rod sleeved in the split ring saw and moving along the axial direction of the split ring saw;
The front end of the split trepan is provided with saw teeth for sawing cortical bone, a guide hole for a guide pin to pass through is axially formed in the reset ejector rod, the axial length of the reset ejector rod is greater than that of the split trepan, and the outer wall surface of the reset ejector rod is provided with scale marks for adjusting the annular cutting depth of cortical bone and measuring the depth of bone canal establishment;
When the cortical bone needs to be cut, the reset ejector rod extends out of the tail end of the split trepan, the front end of the split trepan protrudes out of the front end of the reset ejector rod, the split trepan is guided by the guide pin at the position where the fracture is already made, the split trepan drills into the collapsed fracture position, and the cortical bone is sawed through the saw teeth;
when the fracture needs to be reduced, the reduction ejector rod extends out of the front end of the split trepan, and the reduction ejector rod attacks the collapsed fracture to be reduced under the guide of the guide pin which has already attacked the fracture.
2. An intra-articular fracture reduction device according to claim 1, wherein: the outer wall surface of the guide pin is provided with scale marks.
3. An intra-articular fracture reduction device according to claim 1, wherein: the outer wall surface of the split ring saw is provided with scale marks.
4. An intra-articular fracture reduction device according to claim 1, wherein: the outer wall surface of the reset ejector rod is provided with external threads, the inner wall surface of the opening trepan is provided with internal threads meshed with the external threads, and the inner wall surface of the bottom of the opening trepan is provided with smooth surfaces so as to be beneficial to annular cutting of cortical bones with different thicknesses.
5. An intra-articular fracture reduction device according to claim 4, wherein: and the reset ejector rod moves by 1mm in the axial direction of the split ring saw after rotating for each circle.
6. An intra-articular fracture reduction device according to claim 1, wherein: the length of the opening trephine is larger than that of the guide pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322104245.6U CN221105998U (en) | 2023-08-07 | 2023-08-07 | Intra-articular fracture reduction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322104245.6U CN221105998U (en) | 2023-08-07 | 2023-08-07 | Intra-articular fracture reduction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221105998U true CN221105998U (en) | 2024-06-11 |
Family
ID=91340511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322104245.6U Active CN221105998U (en) | 2023-08-07 | 2023-08-07 | Intra-articular fracture reduction device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221105998U (en) |
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2023
- 2023-08-07 CN CN202322104245.6U patent/CN221105998U/en active Active
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