CN108403203B - Metal intramedullary pin breaker - Google Patents
Metal intramedullary pin breaker Download PDFInfo
- Publication number
- CN108403203B CN108403203B CN201810343394.9A CN201810343394A CN108403203B CN 108403203 B CN108403203 B CN 108403203B CN 201810343394 A CN201810343394 A CN 201810343394A CN 108403203 B CN108403203 B CN 108403203B
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- China
- Prior art keywords
- breaker
- lock nut
- endotheca
- holes
- octagonal
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- 239000002184 metal Substances 0.000 title claims abstract description 54
- 238000010008 shearing Methods 0.000 claims abstract description 42
- 238000005452 bending Methods 0.000 claims description 11
- 230000007704 transition Effects 0.000 claims description 9
- 206010017076 Fracture Diseases 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 208000010392 Bone Fractures Diseases 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 208000011708 Avulsion fracture Diseases 0.000 description 1
- 206010016970 Foot fracture Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
- 210000004197 pelvis Anatomy 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/92—Impactors or extractors, e.g. for removing intramedullary devices
- A61B17/921—Impactors or extractors, e.g. for removing intramedullary devices for intramedullary devices
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgery (AREA)
- Biomedical Technology (AREA)
- Engineering & Computer Science (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The application discloses metal intramedullary needle bar breaker, including rotatory spanner and bar breaker, rotatory spanner includes spanner pole and first handle, first handle cover is located spanner pole's one end, spanner pole deviates from the one end of first handle is protruding to stretch in proper order has interior octagonal bushing, bar breaker includes connecting rod, endotheca, shearing body and lock nut, endotheca and shearing body are the back cover tubular structure, the endotheca passes through lock nut rotatable fixation in the shearing body, the connecting rod is fixed in perpendicularly to cut the outer wall of body, the endotheca be close to lock nut's one end protruding stretch with the octagonal boss that corresponds the setting of interior octagonal bushing, the octagonal boss protrusion in lock nut, the endotheca bottom is equipped with a plurality of stress holes, the shearing body bottom is equipped with a plurality of shear holes, the centre of a circle of stress hole with the centre of a circle of shear hole is in same circumference. The application is suitable for metal intramedullary needles with different specifications, and the operation is simple.
Description
Technical Field
The application relates to a novel device and technology for emergency treatment and rehabilitation, in particular to a metal intramedullary needle rod breaker.
Background
The metal intramedullary pin is used as an internal fixing material for orthopaedics, the length of the metal intramedullary pin is generally fixed at about twenty centimeters, and the diameter of the metal intramedullary pin is between 0.5 and 2 millimeters with different specifications. The fracture fixation device is used for fixing short and small fracture or avulsion fracture and other fracture fixation with low stress, and is also commonly used for fixing temporary fracture blocks in orthopedic operation. Because of wide application, the maximum diameter of the metal intramedullary pin is gradually increased to 4mm along with the external fixation bracket, and the metal intramedullary pin is matched with an external fixation locking nail to fix the pelvis fracture, calcaneus fracture and other emergent larger fractures. The doctor must use medical instrument to perform the rod breaking function when implanting the metal intramedullary needle, and the existing rod breaking device can not adapt to the rod breaking function according to different specifications and models of the intramedullary needle.
Disclosure of Invention
The invention aims to provide a metal intramedullary pin rod breaker so as to overcome the defects in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the embodiment of the application discloses metal intramedullary pin rod breaker, including rotatory spanner and rod breaker, rotatory spanner includes spanner pole and first handle, first handle cover is located the one end of spanner pole, spanner pole deviates from the one end of first handle is protruding to stretch in proper order has interior octagonal sleeve, rod breaker includes connecting rod, endotheca, shearing body and lock nut, endotheca and shearing body are the back cover tubular structure, the endotheca passes through lock nut rotatable fixation in the shearing body, the connecting rod is perpendicular to be fixed in the shearing body outer wall, the endotheca be close to lock nut's one end protruding stretch with the octagonal boss that corresponds the setting of interior octagonal sleeve, the octagonal boss protrusion in lock nut, the endotheca bottom is equipped with a plurality of stress holes, the centre of a circle of stress hole with the centre of a circle of shearing hole is in same circumference.
Preferably, in the metal intramedullary pin breaker, the number of the stress holes is two, and the diameters of the two stress holes are 4.1mm and 3.1mm respectively.
Preferably, in the metal intramedullary pin breaker, the number of the shearing holes is three, and the diameters of the three shearing holes are respectively 4.1mm, 3.1mm and 2.6mm.
Preferably, in the metal intramedullary pin breaker described above, the gap between the bottom of the inner sleeve and the bottom of the shear body is no more than 0.05mm.
Preferably, in the metal intramedullary pin rod breaker, one end of the shear body, which is close to the locking nut, is concavely provided with two steps, namely a first step and a second step, and an external thread is machined on the outer wall of the second step.
Preferably, in the metal intramedullary pin rod breaker, third-order holes with sequentially increased diameters are formed in the lock nut, the third-order holes are respectively a first-order hole, a second-order hole and a third-order hole, internal threads are machined on the inner wall of the second-order hole, the internal threads are correspondingly arranged with the external threads, and the inner diameter of the third-order hole is larger than the outer diameter of the first step.
Preferably, in the metal intramedullary pin rod breaker, a transition section protrudes from one end of the inner sleeve, which is close to the lock nut, the end of the transition section is the octagonal boss, the outer diameter of the transition section is smaller than the inner diameter of the first step hole, and the inner diameter of the first step hole is smaller than the outer diameter of the inner sleeve.
Preferably, in the metal intramedullary pin rod breaker, a groove is formed in the outer wall of the bottom of the shear body, and the groove is communicated with the interior of the shear body.
Preferably, in the metal intramedullary pin rod breaker, one end of the wrench rod, which deviates from the first handle, is sequentially protruded with a protruded portion and a bending portion connected end to end, the protruded portion and the bending portion are arranged at an angle, and one end of the bending portion, which deviates from the protruded portion, is protruded with the octagonal sleeve.
Preferably, in the metal intramedullary pin rod breaker, one end of the connecting rod, which is away from the shearing body, is sleeved with a second handle.
Compared with the prior art, the invention has the advantages that: the inner octagonal sleeve at the front end of the rotary spanner of the metal intramedullary needle bar breaker is sleeved on the octagonal boss of the inner sleeve, and three shearing holes are designed at the bottom end of the shearing body by rotating left and right back and forth and applying pressure to the inner sleeve, so that the metal intramedullary needles with different specifications and types can be conveniently plugged in; during operation, a doctor selects holes with different pore diameters according to the specification model of the metal intramedullary needle so as to plug the metal intramedullary needle rod breaker, and the metal intramedullary needle rod breaker is matched with a rotary wrench to rotate left and right to apply pressure to break the rod, so that the operation is simple and convenient, the operation time of the doctor is reduced, and the pain of a patient is relieved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view showing the structure of a metal intramedullary pin breaker in an embodiment of the invention.
Fig. 2 is a schematic structural view of an inner sleeve according to an embodiment of the present invention.
FIG. 3 is a schematic view showing the structure of a shear body according to an embodiment of the present invention.
Fig. 4 is a schematic structural view of a lock nut according to an embodiment of the present invention.
Fig. 5 is a schematic cross-sectional view of an inner sleeve according to an embodiment of the present invention.
Fig. 6 is a bottom view of a shear body in an embodiment of the present invention.
Fig. 7 is a schematic view of the structure of the inner octagonal bushing according to the embodiment of the invention.
Detailed Description
The following detailed description of the technical solutions according to the embodiments of the present invention will be given with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 6, the metal intramedullary pin breaker in this embodiment includes a rotary wrench 100 and a breaker 200, the rotary wrench 100 includes a wrench rod 110 and a first handle 120, the first handle 120 is sleeved at one end of the wrench rod 110, an inner octagonal sleeve 130 is sequentially protruded at one end of the wrench rod 110, which is away from the first handle 120, the breaker 200 includes a connecting rod 210, an inner sleeve 220, a shearing body 230 and a lock nut 240, the inner sleeve 220 and the shearing body 230 are both in a bottom-sealed cylindrical structure, the inner sleeve 220 is rotatably fixed in the shearing body 230 through the lock nut 240, the connecting rod 210 is vertically fixed on the outer wall of the shearing body 230, one end of the inner sleeve 220, which is close to the lock nut 240, is protruded with an octagonal boss 221 which is correspondingly arranged with the inner octagonal sleeve 130, the octagonal boss 221 protrudes from the lock nut 240, a plurality of stress holes 222 are provided at the bottom of the shearing body 230, and the circle center of the stress holes 222 and the circle center of the shear holes 231 are on the same circumference.
In the technical scheme, the inner sleeve 220 and the shearing body 230 are hollow cylinders with bottoms, namely a bottom-sealing cylindrical structure, and the inner octagonal sleeve at the front end of the rotary spanner of the metal intramedullary pin breaker is sleeved on the octagonal boss of the inner sleeve, and a plurality of shearing holes are designed at the bottom end of the shearing body by rotating left and right back and applying pressure to the octagonal boss, so that metal intramedullary pins with different specifications and types can be conveniently plugged in; during operation, a doctor selects holes with different pore diameters according to the specification model of the metal intramedullary needle so as to plug the metal intramedullary needle rod breaker, and the metal intramedullary needle rod breaker is matched with a rotary wrench to rotate left and right to apply pressure to break the rod, so that the operation is simple and convenient, the operation time of the doctor is reduced, and the pain of a patient is relieved.
Further, the number of the stress holes 222 is two, and the diameters of the stress holes 222 are 4.1mm and 3.1mm, respectively.
Further, the number of the shearing holes 231 is three, and the diameters of the three shearing holes 231 are 4.1mm, 3.1mm and 2.6mm, respectively.
In the two technical schemes, the maximum specification of the metal intramedullary pin is 4mm, all metal intramedullary pins with the specification of 2.5mm and below can be cut through 2.6mm shearing holes, all metal intramedullary pins with the specification of 3mm can be cut through 3.1mm shearing holes, all metal intramedullary pins with the specification of 3.5mm and 4mm can be cut through 4.1mm shearing holes, stress holes can be freely selected, and the same metal intramedullary pin breaker can cut all metal intramedullary pins with the specification.
Further, the gap between the bottom of the inner sleeve 220 and the bottom of the shear body 230 is not more than 0.05mm.
In the technical scheme, burrs are avoided from being generated at the fracture after the metal intramedullary pin is cut.
Further, the end of the shear body 230 near the lock nut 240 is concavely extended with two steps, namely a first step 232 and a second step 233, and the outer wall of the second step is provided with external threads.
Further, third-step holes with sequentially increased diameters are formed in the lock nut 240, and are a first step hole 241, a second step hole 242 and a third step hole 243, an inner thread is machined on the inner wall of the second step hole, the inner thread and the outer thread are correspondingly arranged, and the inner diameter of the third step hole is larger than the outer diameter of the first step.
Further, a transition section 223 protrudes from one end of the inner sleeve 220 near the lock nut 240, the end of the transition section is an octagonal boss 221, the outer diameter of the transition section is smaller than the inner diameter of the first step hole, and the inner diameter of the first step hole is smaller than the outer diameter of the inner sleeve 220.
In the three technical schemes, the inner sleeve is ensured to be rotationally fixed in the shearing body, and the inner sleeve and the shearing body can be freely rotated without blocking.
Further, a groove 234 is formed on the outer wall of the bottom of the shear body 230, and the groove is communicated with the interior of the shear body 230.
In the technical scheme, the gap between the bottom of the inner sleeve and the bottom of the shearing body is convenient to control.
Further, the end of the wrench rod 110 facing away from the first handle 120 is sequentially protruded with a protruding portion 140 and a bending portion 150 connected end to end, the protruding portion 140 and the bending portion 150 are arranged at an angle, and the end of the bending portion 150 facing away from the protruding portion is protruded with an octagonal sleeve 130.
In the technical scheme, the spanner bar 110, the octagonal sleeve 130, the protruding portion 140 and the bending portion 150 are integrally formed, so that strength is guaranteed, the protruding portion 140 and the bending portion 150 are arranged at an angle of 165 degrees, and interference in the two-hand operation process is avoided.
Further, a second handle 250 is sleeved on the end of the connecting rod 210 away from the shear body 230.
In the technical scheme, the medical device is convenient for doctors to hold and apply force.
In summary, the inner octagonal sleeve at the front end of the rotary spanner of the metal intramedullary pin rod breaker is sleeved on the octagonal boss of the inner sleeve, and three shearing holes are designed at the bottom end of the shearing body by rotating left and right back and forth and applying pressure to the inner octagonal boss, so that metal intramedullary pins with different specifications and types can be conveniently plugged in; during operation, a doctor selects holes with different pore diameters according to the specification model of the metal intramedullary needle so as to plug the metal intramedullary needle rod breaker, and the metal intramedullary needle rod breaker is matched with a rotary wrench to rotate left and right to apply pressure to break the rod, so that the operation is simple and convenient, the operation time of the doctor is reduced, and the pain of a patient is relieved
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
The foregoing is merely exemplary of the application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the application and are intended to be comprehended within the scope of the application.
Claims (8)
1. The utility model provides a metal intramedullary needle bar breaker, its characterized in that includes rotatory spanner and bar breaker, rotatory spanner includes spanner pole and first handle, first handle cover is located spanner pole's one end, spanner pole deviates from first handle's one end has protruding interior octagonal tube that stretches in proper order, bar breaker includes connecting rod, endotheca, shearing body and lock nut, endotheca and shearing body are the back cover tubular structure, the endotheca passes through lock nut rotatable fixation in the shearing body, the connecting rod is perpendicular to be fixed in the shearing body outer wall, the endotheca is close to lock nut's one end protruding stretch with the octagonal boss that corresponds the setting of interior octagonal tube, the octagonal boss protrusion in lock nut, the endotheca bottom is equipped with a plurality of shear holes, the centre of a circle of stress hole with the centre of a circle of shear hole is in same circumference, the recess is seted up to the outer wall of shearing body bottom, the recess intercommunication in the shearing body is inside, deviating from the handle one end is equipped with the second octagonal tube.
2. The metal intramedullary pin breaker of claim 1, wherein: the number of the stress holes is two, and the diameters of the two stress holes are 4.1mm and 3.1mm respectively.
3. The metal intramedullary pin breaker of claim 1, wherein: the number of the shearing holes is three, and the diameters of the three shearing holes are 4.1mm, 3.1mm and 2.6mm respectively.
4. The metal intramedullary pin breaker of claim 1, wherein: the gap between the bottom of the inner sleeve and the bottom of the shearing body is not more than 0.05mm.
5. The metal intramedullary pin breaker of claim 1, wherein: the shearing body is close to one end of the lock nut and concavely extends to form two stages of steps, namely a first step and a second step, and an external thread is machined on the outer wall of the second step.
6. The metal intramedullary pin breaker of claim 5, wherein: the novel nut is characterized in that third-order holes with sequentially increased diameters are formed in the lock nut, the third-order holes are respectively a first step hole, a second step hole and a third step hole, an inner thread is machined on the inner wall of the second step hole, the inner thread is correspondingly arranged with the outer thread, and the inner diameter of the third step hole is larger than the outer diameter of the first step.
7. The metal intramedullary pin breaker of claim 6, wherein: the inner sleeve is provided with a transition section protruding from one end close to the locking nut, the end part of the transition section is the octagonal boss, the outer diameter of the transition section is smaller than the inner diameter of the first step hole, and the inner diameter of the first step hole is smaller than the outer diameter of the inner sleeve.
8. The metal intramedullary pin breaker of claim 1, wherein: the spanner rod deviates from the protruding portion and the portion of bending that stretches end to end that stretches in proper order of the one end of first handle, protruding portion with be the angle setting between the portion of bending, the portion of bending deviates from protruding stretching has the octagonal sleeve pipe is protruding to stretch to the one end of protruding portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810343394.9A CN108403203B (en) | 2018-04-17 | 2018-04-17 | Metal intramedullary pin breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810343394.9A CN108403203B (en) | 2018-04-17 | 2018-04-17 | Metal intramedullary pin breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108403203A CN108403203A (en) | 2018-08-17 |
| CN108403203B true CN108403203B (en) | 2024-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810343394.9A Active CN108403203B (en) | 2018-04-17 | 2018-04-17 | Metal intramedullary pin breaker |
Country Status (1)
| Country | Link |
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| CN (1) | CN108403203B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4443941A (en) * | 1981-10-16 | 1984-04-24 | Mcphaul Jack L | Intramedullary pin cutting instrument |
| CN87201601U (en) * | 1987-06-12 | 1987-12-30 | 昌潍医学院 | Intramedullary injection operator |
| CN201227319Y (en) * | 2007-11-21 | 2009-04-29 | 马磊 | Automatic compression anti-rotation intramedullary pin for treating femoral fracture |
| CN206896389U (en) * | 2016-12-26 | 2018-01-19 | 贺新宁 | Scoliosis follows closely rod correction bracket system |
| CN208591125U (en) * | 2018-04-17 | 2019-03-12 | 苏州欣荣博尔特医疗器械有限公司 | Metal intramedullary needle breaks stick device |
-
2018
- 2018-04-17 CN CN201810343394.9A patent/CN108403203B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4443941A (en) * | 1981-10-16 | 1984-04-24 | Mcphaul Jack L | Intramedullary pin cutting instrument |
| CN87201601U (en) * | 1987-06-12 | 1987-12-30 | 昌潍医学院 | Intramedullary injection operator |
| CN201227319Y (en) * | 2007-11-21 | 2009-04-29 | 马磊 | Automatic compression anti-rotation intramedullary pin for treating femoral fracture |
| CN206896389U (en) * | 2016-12-26 | 2018-01-19 | 贺新宁 | Scoliosis follows closely rod correction bracket system |
| CN208591125U (en) * | 2018-04-17 | 2019-03-12 | 苏州欣荣博尔特医疗器械有限公司 | Metal intramedullary needle breaks stick device |
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| Publication number | Publication date |
|---|---|
| CN108403203A (en) | 2018-08-17 |
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