CN104921795A - Self-locking palm marrow inner nail - Google Patents
Self-locking palm marrow inner nail Download PDFInfo
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- CN104921795A CN104921795A CN201510322843.8A CN201510322843A CN104921795A CN 104921795 A CN104921795 A CN 104921795A CN 201510322843 A CN201510322843 A CN 201510322843A CN 104921795 A CN104921795 A CN 104921795A
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- inner core
- self
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- module
- telescopic
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- 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
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7233—Intramedullary pins, nails or other devices 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, 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
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7291—Intramedullary pins, nails or other devices for small bones, e.g. in the foot, ankle, hand or wrist
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/02—Inorganic materials
- A61L31/022—Metals or alloys
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/14—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/14—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L31/16—Biologically active materials, e.g. therapeutic substances
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00831—Material properties
-
- 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
- A61B2017/564—Methods for bone or joint treatment
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
- A61L2300/40—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices characterised by a specific therapeutic activity or mode of action
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2400/00—Materials characterised by their function or physical properties
Abstract
The invention relates to a self-locking palm marrow inner nail which comprises a shell and an inner core, wherein the inner core is arranged in the shell and comprises a lower inner core and an upper inner core, and the lower inner core closes to a nail head. The upper inner core is mutually linked with the lower inner core and can rotate in the shell around the axial direction of the upper inner core, the lower inner core is provided with a self-locking device, the self-locking device comprises a telescopic module and a driving module, a telescopic groove is formed in the shell, the telescopic module extends and retracts through the telescopic groove, the driving module can drive the telescopic module to extend and retract in the telescopic groove from the inner core to the shell, a rotating module is arranged at the end at the top of the upper inner core, the inner core unidirectionally rotates through the rotating module, a taking-off prevention unit is arranged on the telescopic module, the nail can be effectively fixed in a marrow cavity by the driving module after nailing is finished, self-locking technical effects are achieved, the rotating module prevents a fixed locking module from retracting, unidirectionally rotated technical effects are ensured, and a taking-off prevention module prevents the locking module from popping.
Description
Technical field
The present invention relates to a kind of intramedullary pin, especially one is applicable on metacarpal bone marrow, and with the metacarpal bone intramedullary pin of lock function.
Background technology
Metacarpal fracture generally can be divided into head of metacarpal bone to fracture; Fracture of metacarpal cervix; Fracture of the shaft of the metacarpal bone and metacarpal bone substrate fracture four large classes, wherein metacarpal bone neck and fracture of the shaft of the metacarpal bone are comparatively common, and male's incidence of fracture is less compared with the common displacement fracture of women, feasible extenal fixation, general fixing means is more, and fixing maneuver differs, and has traction fixing respectively, plaster slab extenal fixation, plintlet is fixing.At present because External technique is applied widely, can process classification of fracture many, fixation, the advantage such as reset correct, the effective development of therapeutic modality variation etc., such as 1. percutaneous kirschner wire technique for fixing.And 1. open reduction Kirschner wires intersections afterwards fix 2. miniature steel plate internal fixtion.Exterior fixation bracket technique for fixing metacarpal bone belongs to tubular bone, in the treatment of other long bone bones, along with the development of less invasive techniques and carrying out of clinical related surgical, treatment is the treatment means of technical foundation obtains effective development with intramedullary pin, from the forties in 20th century so far, coming out one after another of domestic and international a large amount of intramedullary pin, and the appearance of the intramedullary nail with lock in 60th century, long tubular bone fracture intramedullary nail treatment technology trends towards maturation, and operation process is fast, the treatment that the features such as wound is little, and prognosis is good have become current long tube shaft fracture is first-selected.Intramedullary nailing system utilizes dissimilar draw point to penetrate medullary cavity to control fracture end position, it belongs to center and fixes, at mechanics angle, intensity is greater than eccentric fixing bone-fracture fixation steel plate technique for fixing, applicable long bone shaft fracture is fixed, in the outer setting board of skeleton end fracture of partial joint, also there is certain utilization.The intramedullary pin suitable with long bone pulp cavity according to the intramedullary pin viewpoint 1. of Kuntscher proposition in 1940 has better fixing effect of fracturing, and extenal fixation 2. can be avoided away from fracture site drift bolt, avoids the destruction to fracture local soft tissue and the confession of fracture end blood.Have developed more long bone intramedullary pin both at home and abroad at present.Along with the development in 21st century, the less invasive techniques that minimally invasive surgery must become other each long bone intramedullary pins of theme [6] of current surgical intervention is quite ripe, but the use of metacarpal bone intramedullary pin does not temporarily obtain effective research and development and uses, better modus operandi and more surgical condition need us to go to explore and create.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of fixing nail in bone marrow, and especially one is applicable to fracture of the shaft of the metacarpal bone, and with the metacarpal bone intramedullary pin of lock function.
For solving the problems of the technologies described above, the present invention includes shell, and the top be located in shell, inner core, described inner core comprises the hypomere inner core and epimere inner core that are close to ailhead place, described epimere inner core and hypomere inner core link mutually and epimere inner core can in the enclosure around self axial rotation, described hypomere inner core is provided with self-locking device, described self-locking device comprises flexible module and driver module, described shell is provided with for the flexible telescopic chute of flexible module, described driver module can drive flexible module to be stretched to shell by inner core in telescopic chute, end, described epimere inner core top is provided with the rotating module that inner core one direction is rotated, described flexible module is provided with after Anti-extrusion unit have employed said structure, self-locking device comprises flexible module and driver module, driver module can drive flexible module flexible in telescopic chute, nailing so just can be made to complete after, driver module is utilized well to be fixed among pulp cavity by nail, reach the technique effect of self-locking, and rotating module prevents the retraction of fixing rear locking module, ensure that the technique effect that one direction is rotated, and Anti-extrusion module prevents locking module to eject.
As a further improvement on the present invention, described flexible module is two telescopic block be oppositely arranged, described two telescopic block opposite positions are equipped with one section of sawtooth, described driver module is the gear suitable with the sawtooth in telescopic block, described epimere inner core and hypomere inner core are that split is arranged, described epimere inner core hollows out one section and forms telescopic chute, described gear is located in this telescopic chute, described gear both sides are equipped with telescopic block, described shell is provided with for the flexible telescopic chute of telescopic block with telescopic block corresponding position, described hypomere core surface is provided with cross lock slots near epimere inner core place, described epimere core surface is provided with the cross lock tab matched with cross lock slots near hypomere inner core place, described top is installed with telescopic block fixed cell, described telescopic block fixed cell is for being arranged between telescopic block, and along the symmetrically arranged limited block of gear.
After have employed said structure, the arranging of telescopic block can achieve the locking to nail easily, and rely on two inner cores with the use of, make the locking process of user to self-locking more convenient, limited block also well serves the support on flexible module level direction.
As a further improvement on the present invention, described metacarpal bone intramedullary pin material is titanium alloy.
After have employed said structure, titanium alloy has following characteristics: 1. compared with rustless steel, with osseous tissue closer to; 2. titanium alloy degree of flexibility is high, anti-fatigue ability 3. titanium alloy is had more less for the regrowth impact of osseous tissue compared with other stainless steel materials, 4. component of organization is low, and histocompatibility is good, and the making of the less 5. titanium alloy intramedullary pins of anaphylaxis and clinical application are quite ripe.
As a further improvement on the present invention, described self-locking device is the locking cap be fixedly arranged on inner core, described locking cap comprises caping and lid, described lid outer wall is provided with the first screw thread, described outer casing inner wall is provided with second screw thread suitable with the first screw thread, described caping top surface is provided with the first rotation slot, spring is installed with bottom described lid, described spring is fixedly connected with a spill spin block, described inner core and locking cap junction are provided with the second rotation slot, the shape of described second rotation slot and size and spill spin block suitable.
After have employed said structure, locking cap relies on the technical characterstic of screw thread, suitable with the screw thread of outer casing inner wall, reaches and prevents inner core from skidding off, and spin locking cap gets final product the technique effect of rotary inner core.
As a further improvement on the present invention, described Anti-extrusion unit is the positive stop being arranged at both ends, sawtooth place in telescopic block, and the shape of described positive stop is consistent with sawtooth, and the volume of positive stop is greater than sawtooth.
After have employed said structure, positive stop by the movement ceases of whole sawtooth, can well make it no longer coordinate with gear, prevents from.
As a further improvement on the present invention, described intramedullary pin width is 5.5-6 millimeter, and length is 7 centimetres, and telescopic block horizontal length is set as 2 millimeters, and described gear is 1.5 millimeters.
After have employed said structure, through analysis and the sampling of a series of data, male WSM numeral is 9.24 ± 0.8mm, and expand marrow 1.5-2mm, intramedullary pin width can be increased to 5.5-6mm, LSM average range: 70.25 ± 4.67mm, and design length is 7cm.
Accompanying drawing explanation
figure 1 shows that the self-contained figure of this invention;
figure 2 shows that intramedullary pin perspective internal view;
figure 3 shows that locking cap structural representation;
figure 4 shows that epimere inner core and hypomere core arrangement schematic diagram;
figure 5 shows that shell and locking cap structural representation.
Detailed description of the invention
As shown in Fig. 1 Fig. 2, the present invention includes shell (1), and the inner core (2) be located in shell, described inner core comprises the hypomere inner core (21) and epimere inner core (22) that are close to ailhead place, described epimere inner core (22) and hypomere inner core (21) link mutually and epimere inner core can in the enclosure around self axial rotation, described hypomere inner core (21) is provided with self-locking device, described self-locking device comprises flexible module and driver module, described shell (1) is provided with for the flexible telescopic chute (23) of flexible module, described driver module can drive flexible module to be stretched to shell (1) by inner core (2) in telescopic chute (23), described epimere inner core (22) end, top is provided with the rotating module that inner core one direction is rotated, described flexible module is provided with Anti-extrusion unit.Self-locking device comprises flexible module and driver module, driver module can drive flexible module flexible in telescopic chute, nailing so just can be made to complete after, driver module is utilized well to be fixed among pulp cavity by nail, reach the technique effect of self-locking, and rotating module prevents the retraction of fixing rear locking module, ensure that the technique effect that one direction is rotated, and Anti-extrusion module prevents locking module to eject.
As shown in Fig. 2 Fig. 4, described flexible module is two telescopic block be oppositely arranged (3), described two telescopic block (3) opposite positions are equipped with one section of sawtooth (31), described driver module is the gear (4) suitable with the sawtooth in telescopic block, described epimere inner core (22) and hypomere inner core (21) are arranged for split, described epimere inner core (22) hollows out one section and forms telescopic chute (23), described gear (4) is located in this telescopic chute (23), described gear (4) both sides are equipped with telescopic block (3), described shell is provided with for the flexible telescopic chute (23) of telescopic block with telescopic block corresponding position, described hypomere inner core (21) surface is provided with cross lock slots (5) near epimere inner core (22) place, described epimere inner core (22) surface is provided with near hypomere inner core (21) place the cross lock tab (6) matched with cross lock slots, described top is installed with telescopic block fixed cell, described telescopic block fixed cell is for being arranged between telescopic block, and along the symmetrically arranged limited block of gear (7).The arranging of telescopic block can achieve the locking to nail easily, and rely on two inner cores with the use of, make the locking process of user to self-locking more convenient, limited block (7) also well serves the support on flexible module level direction.
Described metacarpal bone intramedullary pin material is titanium alloy.Titanium alloy has following characteristics: 1. compared with rustless steel, with osseous tissue closer to; 2. titanium alloy degree of flexibility is high, anti-fatigue ability 3. titanium alloy is had more less for the regrowth impact of osseous tissue compared with other stainless steel materials, 4. component of organization is low, and histocompatibility is good, and the making of the less 5. titanium alloy intramedullary pins of anaphylaxis and clinical application are quite ripe
As shown in Fig. 3 Fig. 5, described self-locking device is the locking cap (8) be fixedly arranged on inner core, described locking cap (8) comprises caping (81) and lid (82), described lid (82) outer wall is provided with the first screw thread (821), described outer casing inner wall is provided with second screw thread (822) suitable with the first screw thread (821), described caping (81) top surface is provided with the first rotation slot (811), described lid (82) bottom is installed with spring (812), described spring (812) is fixedly connected with a spill spin block (813), described inner core and locking cap junction are provided with the second rotation slot (814), the shape of described second rotation slot (814) and size and spill spin block (813) suitable.
As shown in Figure 2, described Anti-extrusion unit is for being arranged at the positive stop (31) at both ends, telescopic block (3) upper sawtooth place, and the shape of described positive stop is consistent with sawtooth, and the volume of positive stop is greater than sawtooth.Positive stop by the movement ceases of whole sawtooth, can well make it no longer coordinate with gear, prevents from.
Described intramedullary pin width is 5.5-6 millimeter, and length is 7 centimetres, and telescopic block horizontal length is set as 2 millimeters, and described gear is 1.5 millimeters.Through analysis and the sampling of a series of data, male WSM numeral is 9.24 ± 0.8mm, and expand marrow 1.5-2mm, intramedullary pin width can be increased to 5.5-6mm, LSM average range: 70.25 ± 4.67mm, and design length is 7cm.
Claims (6)
1. a self-locking metacarpal bone intramedullary pin, it is characterized in that: described self-locking metacarpal bone intramedullary pin comprises shell, and the top be located in shell, inner core, described inner core comprises the hypomere inner core and epimere inner core that are close to ailhead place, described epimere inner core and hypomere inner core link mutually and epimere inner core can in the enclosure around self axial rotation, described hypomere inner core is provided with self-locking device, described self-locking device comprises flexible module and driver module, described shell is provided with for the flexible telescopic chute of flexible module, described driver module can drive flexible module to be stretched to shell by inner core in telescopic chute, end, described epimere inner core top is provided with the rotating module that inner core one direction is rotated, described flexible module is provided with Anti-extrusion unit.
2. self-locking metacarpal bone intramedullary pin according to claim 1, it is characterized in that: described flexible module is two telescopic block be oppositely arranged, described two telescopic block opposite positions are equipped with one section of sawtooth, described driver module is the gear suitable with the sawtooth in telescopic block, described epimere inner core and hypomere inner core are that split is arranged, described epimere inner core hollows out one section and forms telescopic chute, described gear is located in this telescopic chute, described gear both sides are equipped with telescopic block, described shell is provided with for the flexible telescopic chute of telescopic block with telescopic block corresponding position, described hypomere core surface is provided with cross lock slots near epimere inner core place, described epimere core surface is provided with the cross lock tab matched with cross lock slots near hypomere inner core place, described top is installed with telescopic block fixed cell, described telescopic block fixed cell is for being arranged between telescopic block, and along the symmetrically arranged limited block of gear.
3. self-locking metacarpal bone intramedullary pin according to claim 1, is characterized in that: described metacarpal bone intramedullary pin material is titanium alloy.
4. self-locking metacarpal bone intramedullary pin according to claim 2, it is characterized in that: described self-locking device is the locking cap be fixedly arranged on inner core, described locking cap comprises caping and lid, described lid outer wall is provided with the first screw thread, described outer casing inner wall is provided with second screw thread suitable with the first screw thread, described caping top surface is provided with the first rotation slot, spring is installed with bottom described lid, described spring is fixedly connected with a spill spin block, described inner core and locking cap junction are provided with the second rotation slot, the shape of described second rotation slot and size and spill spin block suitable.
5. self-locking metacarpal bone intramedullary pin according to claim 2, it is characterized in that: described Anti-extrusion unit is the positive stop being arranged at both ends, sawtooth place in telescopic block, the shape of described positive stop is consistent with sawtooth, and the volume of positive stop is greater than sawtooth.
6. self-locking metacarpal bone intramedullary pin according to claim 2, it is characterized in that: described intramedullary pin width is 5.5-6 millimeter, length is 7 centimetres, and telescopic block horizontal length is set as 2 millimeters, and described gear is 1.5 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510322843.8A CN104921795B (en) | 2015-06-12 | 2015-06-12 | Self-locking palm marrow inner nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510322843.8A CN104921795B (en) | 2015-06-12 | 2015-06-12 | Self-locking palm marrow inner nail |
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| Publication Number | Publication Date |
|---|---|
| CN104921795A true CN104921795A (en) | 2015-09-23 |
| CN104921795B CN104921795B (en) | 2017-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510322843.8A Active CN104921795B (en) | 2015-06-12 | 2015-06-12 | Self-locking palm marrow inner nail |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4204531A (en) * | 1977-12-28 | 1980-05-27 | Yacov Aginsky | Intramedullary nail with expanding mechanism |
| WO2004078220A2 (en) * | 2003-02-28 | 2004-09-16 | Triage Medical Inc. | Tool for bone fixation device |
| WO2006079184A1 (en) * | 2005-01-31 | 2006-08-03 | Ian Ross Griggs | Improved intramedullary bone device |
| CN204106176U (en) * | 2014-09-10 | 2015-01-21 | 汤锦波 | Metacarpal fracture micro hollow compress intramedullary nail |
| CN204708962U (en) * | 2015-06-12 | 2015-10-21 | 温州医科大学附属第二医院 | A kind of self-locking metacarpal bone intramedullary pin |
-
2015
- 2015-06-12 CN CN201510322843.8A patent/CN104921795B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4204531A (en) * | 1977-12-28 | 1980-05-27 | Yacov Aginsky | Intramedullary nail with expanding mechanism |
| WO2004078220A2 (en) * | 2003-02-28 | 2004-09-16 | Triage Medical Inc. | Tool for bone fixation device |
| WO2006079184A1 (en) * | 2005-01-31 | 2006-08-03 | Ian Ross Griggs | Improved intramedullary bone device |
| CN204106176U (en) * | 2014-09-10 | 2015-01-21 | 汤锦波 | Metacarpal fracture micro hollow compress intramedullary nail |
| CN204708962U (en) * | 2015-06-12 | 2015-10-21 | 温州医科大学附属第二医院 | A kind of self-locking metacarpal bone intramedullary pin |
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| CN104921795B (en) | 2017-05-10 |
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