CN104887303A - PFNA (proximal femoral nail anti-rotation) intramedullary nail - Google Patents
PFNA (proximal femoral nail anti-rotation) intramedullary nail Download PDFInfo
- Publication number
- CN104887303A CN104887303A CN201510370215.7A CN201510370215A CN104887303A CN 104887303 A CN104887303 A CN 104887303A CN 201510370215 A CN201510370215 A CN 201510370215A CN 104887303 A CN104887303 A CN 104887303A
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- CN
- China
- Prior art keywords
- pfna
- nail
- main nail
- hole
- intramedullary pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- UZUFPBIDKMEQEQ-UHFFFAOYSA-N perfluorononanoic acid Chemical compound OC(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F UZUFPBIDKMEQEQ-UHFFFAOYSA-N 0.000 claims description 48
- 239000000463 material Substances 0.000 claims description 4
- 229910000883 Ti6Al4V Inorganic materials 0.000 claims description 3
- 210000000988 bone and bone Anatomy 0.000 abstract description 2
- 230000000399 orthopedic effect Effects 0.000 abstract 1
- 208000010392 Bone Fractures Diseases 0.000 description 7
- 206010017076 Fracture Diseases 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 208000002970 Coxa Vara Diseases 0.000 description 1
- 206010020100 Hip fracture Diseases 0.000 description 1
- 208000001132 Osteoporosis Diseases 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000009885 systemic effect Effects 0.000 description 1
- 210000001694 thigh bone Anatomy 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
- 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 or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary devices, e.g. pins or nails
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- 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 or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary devices, e.g. pins or nails
- A61B17/7233—Intramedullary devices, e.g. pins or nails with special means of locking the nail to the bone
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- 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 or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary devices, e.g. pins or nails
- A61B17/7233—Intramedullary devices, e.g. pins or nails with special means of locking the nail to the bone
- A61B17/725—Intramedullary devices, e.g. pins or nails with special means of locking the nail to the bone with locking pins or screws of special form
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Neurology (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 invention provides a PFNA (proximal femoral nail anti-rotation) intramedullary nail and belongs to the technical field of orthopedic medical devices. The PFNA intramedullary nail comprises a main nail, provided with a lock nail hole close to its distal end; a lock nail penetrates the lock nail hole; a tension screw hole is provided near the proximal end of the main nail; a PFNA screw blade penetrates the tension screw hole; the side of the PFNA screw blade is symmetrically provided with four limiting grooves; the proximal end of the main nail is provided with a PFNA cap and an anti-rotation device; the PFNA cap allows the anti-rotation device to be fixed to the proximal end of the main nail; the proximal end of the main nail is provided with four slides; the anti-rotation device comprises a circular pad; four limiting plates are perpendicularly arranged at the bottom of the circular pad; the limiting plates penetrate the slides and are located in the limiting grooves. The PFNA intramedullary nail is simple in structure and reasonable in design; after inserted into the human bone, the PFNA intramedullary nail can be avoided displacing or rotating, the safety and the reliability are high, and operating is convenient.
Description
Technical field
The present invention relates to orthopaedics medical instruments field, specifically a kind of PFNA intramedullary pin.
Background technology
Intertrochanteric fracture is the common fracture of one of old people.There are following three features clinically: one is that patient mostly is advanced age, and systemic conditions is poor, and with multiple internal medicine complication, these complication often have and increase the weight of after the fracture, and cause disease treatment difficulty to strengthen, case fatality rate is higher; Two is bone mass, has clear and definite osteoporosis more, causes fracture fixation reliability to reduce; Three is that classification of fracture mostly is pulverizing unstable fracture, easily postoperative coxa vara occurs, head and neck cripetura and fixation failure, fracture.In treatment, surgical operation is fixing as early as possible becomes common recognition, and its key provides a kind of strong and stable bridging apparatus early stage in union of fracture, makes patient's Go to ground activity as early as possible, reduce case fatality rate.When being fixed fractured near end of thighbone, proximate interruption section (mainly femoral head) must aim at femoral axis directional at-tachment, namely keeps anti-displacement and rotates fixing.How providing a kind of PFNA intramedullary pin realizing this function, is the technical barrier of this area.
Summary of the invention
The problem to be solved in the present invention is: overcome the deficiencies in the prior art, and provide a kind of structure simple, reasonable in design, after rivet nut inserts skeleton, can prevent rivet nut displacement and rotation, safety and reliability is high, easy to operate PFNA intramedullary pin.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of PFNA intramedullary pin, comprise main nail, far-end near main nail is provided with locking nail hole, pinning is had to pass in described locking nail hole, near-end near main nail is provided with lag screw hole, PFNA screw blade is had to pass in described lag screw hole, the Side symmetrical of described PFNA screw blade is provided with four stopper slots, the near-end of described main nail is provided with PFNA block and an anti-rotation device, anti-rotation device is fixed on the near-end of main nail by described PFNA block, the near-end of described main nail is provided with four chutes, described anti-rotation device comprises a circular gasket, described circular gasket bottom vertical is provided with four limiting plates, described limiting plate passes chute and is positioned at stopper slot.
Further, the angle of described lag screw hole and main nail is 90 °.
Further, the angle of the axis of described stopper slot and PFNA screw blade is 90 °.
Further, the angle of described lag screw hole and main nail is 55 °.
Further, the angle of the axis of described stopper slot and PFNA screw blade is 55 °.
Further, the rear end of described main nail arranges the top rake of 8-10 ° relative to its front end.
Further, the material of described main nail is Ti-6Al-4V, Ti-6Al-7Nb or 00Cr18Ni14Mo3.
Further, there is a circular hole at the center of described circular gasket, and pad, through circular hole, is fixed on the near-end of main nail by described PFNA block.
The advantage that the present invention has and good effect are:
Structure of the present invention is simple, reasonable in design, and after rivet nut inserts skeleton, can prevent rivet nut displacement and rotation, safety and reliability is high, easy to operate.
Accompanying drawing explanation
Fig. 1 is the front view of embodiment one.
Fig. 2 is the side view of embodiment one.
Fig. 3 is the front view of embodiment two.
Fig. 4 is the top view of the PFNA screw blade of embodiment one.
Fig. 5 is the front view of the PFNA screw blade of embodiment one.
Fig. 6 is the top view of circular gasket.
Fig. 7 is the top view of the main nail near-end of embodiment one.
Fig. 8 is the top view of the PFNA screw blade of embodiment two.
Fig. 9 is the front view of the PFNA screw blade of embodiment two.
In figure: 1, main nail; 2, locking nail hole; 3, pinning; 4, lag screw hole; 5, PFNA screw blade; 6, stopper slot; 7, PFNA block; 8, chute; 9, circular gasket; 10, limiting plate; 11, circular hole.
Detailed description of the invention
Embodiment one
As Fig. 1, 2, 4, 5, 6, shown in 7, a kind of PFNA intramedullary pin, comprise main nail 1, the material of main nail 1 is Ti-6Al-4V, the rear end of main nail arranges the top rake of 9 ° relative to its front end, far-end near main nail 1 is provided with locking nail hole 2, pinning 3 is had to pass in locking nail hole 2, near-end near main nail 1 is provided with lag screw hole 4, lag screw hole 4 is 90 ° with the angle of main nail 1, PFNA screw blade 5 is had to pass in lag screw hole 4, the Side symmetrical of PFNA screw blade 5 is provided with four stopper slots 6, stopper slot 6 is 90 ° with the angle of the axis of PFNA screw blade 5, the near-end of main nail 1 is provided with PFNA block 7 and an anti-rotation device, anti-rotation device is fixed on the near-end of main nail 1 by PFNA block 7, the near-end of main nail 1 is provided with four chutes 8, anti-rotation device comprises a circular gasket 9, circular gasket 9 bottom vertical is provided with four limiting plates 10, limiting plate 10 passes chute 8 and is positioned at stopper slot 6, there is a circular hole 11 at the center of circular gasket 9, PFNA block 7 is through circular hole 11, circular gasket 9 is fixed on the near-end of main nail 1.
The work process of the present embodiment: during use, main nail 1 is screwed in skeleton, be fixed respectively with locking 3 and lag screw 4, in order to prevent lag screw 4 displacement and rotation, the limiting plate 10 of anti-rotation device is passed chute 8 and is positioned at stopper slot 6, and with PFNA block 7 through circular hole 11, circular gasket 9 is fixed on the near-end of main nail 1.Structure of the present invention is simple, and reasonable in design, after rivet nut 1 inserts skeleton, can prevent rivet nut 1 displacement and rotation, safety and reliability is high, easy to operate.
Embodiment two
As Fig. 3, 6, 8, shown in 9, a kind of PFNA intramedullary pin, comprise main nail 1, the material of main nail 1 is 00Cr18Ni14Mo3, the rear end of main nail arranges the top rake of 9 ° relative to its front end, far-end near main nail 1 is provided with locking nail hole 2, pinning 3 is had to pass in locking nail hole 2, near-end near main nail 1 is provided with lag screw hole 4, lag screw hole 4 is 55 ° with the angle of main nail 1, PFNA screw blade 5 is had to pass in lag screw hole 4, the Side symmetrical of PFNA screw blade 5 is provided with four stopper slots 6, stopper slot 6 is 55 ° with the angle of the axis of PFNA screw blade 5, the near-end of main nail 1 is provided with PFNA block 7 and an anti-rotation device, anti-rotation device is fixed on the near-end of main nail 1 by PFNA block 7, the near-end of main nail 1 is provided with four chutes 8, anti-rotation device comprises a circular gasket 9, circular gasket 9 bottom vertical is provided with four limiting plates 10, limiting plate 10 passes chute 8 and is positioned at stopper slot 6, there is a circular hole 11 at the center of circular gasket 9, PFNA block 7 is through circular hole 11, circular gasket 9 is fixed on the near-end of main nail 1.
The work process of the present embodiment: with embodiment one.
Above embodiments of the invention have been described in detail, but described content being only preferred embodiments of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.
Claims (8)
1. a PFNA intramedullary pin, comprise main nail, it is characterized in that: the far-end near main nail is provided with locking nail hole, pinning is had to pass in described locking nail hole, near-end near main nail is provided with lag screw hole, PFNA screw blade is had to pass in described lag screw hole, the Side symmetrical of described PFNA screw blade is provided with four stopper slots, the near-end of described main nail is provided with PFNA block and an anti-rotation device, anti-rotation device is fixed on the near-end of main nail by described PFNA block, the near-end of described main nail is provided with four chutes, described anti-rotation device comprises a circular gasket, described circular gasket bottom vertical is provided with four limiting plates, described limiting plate passes chute and is positioned at stopper slot.
2. a kind of PFNA intramedullary pin according to claim 1, is characterized in that: the angle of described lag screw hole and main nail is 90 °.
3. a kind of PFNA intramedullary pin according to claim 2, is characterized in that: the angle of the axis of described stopper slot and PFNA screw blade is 90 °.
4. a kind of PFNA intramedullary pin according to claim 1, is characterized in that: the angle of described lag screw hole and main nail is 55 °.
5. a kind of PFNA intramedullary pin according to claim 4, is characterized in that: the angle of the axis of described stopper slot and PFNA screw blade is 55 °.
6. a kind of PFNA intramedullary pin according to any one of claim 1-5, is characterized in that: the rear end of described main nail arranges the top rake of 8-10 ° relative to its front end.
7. a kind of PFNA intramedullary pin according to claim 1, is characterized in that: the material of described main nail is Ti-6Al-4V, Ti-6Al-7Nb or 00Cr18Ni14Mo3.
8. a kind of PFNA intramedullary pin according to claim 1, is characterized in that: there is a circular hole at the center of described circular gasket, and pad, through circular hole, is fixed on the near-end of main nail by described PFNA block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510370215.7A CN104887303A (en) | 2015-06-29 | 2015-06-29 | PFNA (proximal femoral nail anti-rotation) intramedullary nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510370215.7A CN104887303A (en) | 2015-06-29 | 2015-06-29 | PFNA (proximal femoral nail anti-rotation) intramedullary nail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104887303A true CN104887303A (en) | 2015-09-09 |
Family
ID=54020572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510370215.7A Pending CN104887303A (en) | 2015-06-29 | 2015-06-29 | PFNA (proximal femoral nail anti-rotation) intramedullary nail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104887303A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113952013A (en) * | 2021-11-15 | 2022-01-21 | 上海交通大学医学院附属仁济医院 | Proximal femoral intramedullary nail with proximal cross nail |
| CN118634016A (en) * | 2024-06-29 | 2024-09-13 | 北京贝思达生物技术有限公司 | Intramedullary nail with wire |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020032445A1 (en) * | 2000-07-27 | 2002-03-14 | Hiroo Fujiwara | Intramedullary nail |
| CN103784192A (en) * | 2012-10-31 | 2014-05-14 | 陈枫文 | Medical PFNA (Proximal Femoral Nail Anti-rotation) positioner |
| CN203634270U (en) * | 2013-12-12 | 2014-06-11 | 赵志强 | Lateral bending rotation-preventing intramedullary nail used at near end of thigh bone |
| CN204814140U (en) * | 2015-06-29 | 2015-12-02 | 北京贝思达生物技术有限公司 | PFNA intramedullary nail |
-
2015
- 2015-06-29 CN CN201510370215.7A patent/CN104887303A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020032445A1 (en) * | 2000-07-27 | 2002-03-14 | Hiroo Fujiwara | Intramedullary nail |
| CN103784192A (en) * | 2012-10-31 | 2014-05-14 | 陈枫文 | Medical PFNA (Proximal Femoral Nail Anti-rotation) positioner |
| CN203634270U (en) * | 2013-12-12 | 2014-06-11 | 赵志强 | Lateral bending rotation-preventing intramedullary nail used at near end of thigh bone |
| CN204814140U (en) * | 2015-06-29 | 2015-12-02 | 北京贝思达生物技术有限公司 | PFNA intramedullary nail |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113952013A (en) * | 2021-11-15 | 2022-01-21 | 上海交通大学医学院附属仁济医院 | Proximal femoral intramedullary nail with proximal cross nail |
| CN118634016A (en) * | 2024-06-29 | 2024-09-13 | 北京贝思达生物技术有限公司 | Intramedullary nail with wire |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150909 |
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| RJ01 | Rejection of invention patent application after publication |