CN204410948U - For the fixing tail cap of closed intramedullary pin centre bore tail end - Google Patents
For the fixing tail cap of closed intramedullary pin centre bore tail end Download PDFInfo
- Publication number
- CN204410948U CN204410948U CN201420871014.6U CN201420871014U CN204410948U CN 204410948 U CN204410948 U CN 204410948U CN 201420871014 U CN201420871014 U CN 201420871014U CN 204410948 U CN204410948 U CN 204410948U
- Authority
- CN
- China
- Prior art keywords
- tail cap
- tail
- intramedullary pin
- centre bore
- fixing
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a kind of fixing tail cap for closed intramedullary pin centre bore tail end, its structure is overall stepped cylindrical structure, tail cap head (1) is designed with successively along axis, adaptive section (2) and guide rod section (3), the external cylindrical surface of tail cap head is designed with the external screw thread forming thread connection with intramedullary pin centre bore tail end female thread, tail cap end surface be designed with match with screwing tool screw structure for what make internal and external threads engage, the external diameter of adaptive section is less than and close to footpath, the tail cap head externally threaded end, so that internal and external threads engagement, the diameter of guide rod section is less than the diameter of adaptive section, so that fixing tail cap inserts in intramedullary pin centre bore.Fixing tail cap described in the utility model can reduce the difficulty that intramedullary pin inserted by tail cap, and it is easily convenient to make to insert, and ensures that implantation site is accurate, can reduce the unexpected and operating time prolongation of unnecessary operation.
Description
Technical field
This utility model belongs to fracture fixation equipment field, is specifically related to a kind of fixing tail cap for closed intramedullary pin center hole tail end.
Background technology
Intramedullary pin is the internal fixation device that orthopaedics is conventional, for the treatment of tubular bone fracture.The general structure of intramedullary pin comprises main nail, pinning and tail cap.Under normal circumstances, need after completing replacement and fixation to fracture to insert tail cap at main nail centre bore tail end, close intramedullary pin centre bore port on the one hand, reduce port to soft tissue excitation, avoid soft tissue and callus to grow in intramedullary pin centre bore on the other hand, be convenient to the second stage of union of fracture recession except internal fixation device.Existing tail cap is by being designed with the tail cap head of interior hexagonal and forming with the short thin external thread rod that tail cap head is structure as a whole.In actual applications, this tail cap inserts intramedullary pin difficulty due to reasons such as patient body position or patient's experiences, particularly insert femoral interlocking nail, often be difficult to make tail cap thread and intramedullary pin screw-threaded engagement, screw in difficulty, and malposition, producing pathological changes after even inserting soft tissue affects therapeutic effect.In addition, because tail cap thread screws in intramedullary pin centre bore screw thread difficulty, tail cap often comes off from hands, drops in operative site otch, often occurs finding the tail cap that comes off and takies very long operating time problem.Cause the reason that the problems referred to above occur: 1. intramedullary pin entry point in the inner part; 2. following closely tail soft tissue is separated clear not; 3. while screwing tail cap, position is bad; 4. patient's bodily form obesity causes soft tissue to block.The main method addressed these problems at present improves medical personnel's medical technique level, do not propose effectively for intramedullary pin tail cap and improved by the Machine Design aspect of Clinical practice, tail cap inserts difficulty, insert effect bad, affect therapeutic effect and bring the problems such as negative effect still to exist.
Utility model content
The purpose of this utility model is for the deficiencies in the prior art, a kind of novel fixing tail cap for closed intramedullary pin centre bore tail end is provided, to reduce the difficulty that intramedullary pin inserted by tail cap, guarantee implantation site is accurate, improve and insert convenience, thus reduce unnecessary operation accident and operating time.
Fixing tail cap for closed intramedullary pin centre bore tail end described in the utility model, consist of overall stepped cylindrical structure, tail cap head is designed with successively along axis, adaptive section and guide rod section, the external cylindrical surface of tail cap head is designed with the external screw thread forming thread connection with intramedullary pin centre bore tail end female thread, tail cap end surface be designed with match with screwing tool screw structure for what make internal and external threads engage, the external diameter of adaptive section is less than and close to footpath, the tail cap head externally threaded end, so that internal and external threads engagement, the diameter of guide rod section is less than the diameter of adaptive section, so that fixing tail cap inserts in intramedullary pin centre bore.
In the technical scheme of above-mentioned fixing tail cap of the present utility model, described in screw structure be interior polyhedral angle counterbore, be positioned at tail cap head outer end central authorities.Described interior polyhedral angle counterbore decision design is interior hexahedro angle counterbore.
In the technical scheme of above-mentioned fixing tail cap of the present utility model, described tail cap head outer end is designed with the holding structure matched with holding instrument, control internal fixtion tail cap so that hold in medical worker's operation, prevent internal fixtion tail cap from falling in operative site soft tissue.Described holding structure decision design is the screwed hole that diameter is less than interior polyhedral angle counter bore hole diameters, is positioned at central authorities at the bottom of polyhedral angle counterbore hole.
In the technical scheme of above-mentioned fixing tail cap of the present utility model, screw thread on tail cap head external cylindrical surface be preferably disposed on tail cap head near adaptive section one end 2/3rds length on, the free end of remaining tail cap head is the smooth cylindrical that diameter is equal with Major Diam, to reduce the excitation to soft tissue.
In the technical scheme of above-mentioned fixing tail cap of the present utility model, the end of described adaptive section and the end of guide rod section are all preferably designed as the cambered surface through chamfering, so that internal and external threads engages more easily, fixing tail cap inserts in intramedullary pin centre bore more easily
In the technical scheme of above-mentioned fixing tail cap of the present utility model, the free end diameter of described tail cap head is equal with the major diameter of thread on tail cap head.
The fixing tail cap for closed intramedullary pin centre bore tail end that this utility model provides compared with prior art, has following beneficial effect:
1, fixing tail cap described in the utility model is designed with guide rod section, being convenient to fixing tail cap inserts in intramedullary pin centre bore, and make the centralization of tail cap, be designed with adaptive section simultaneously, the external screw thread being convenient to the design of tail cap head external cylindrical surface engages with the female thread of intramedullary pin centre bore tail end, to reduce the difficulty that intramedullary pin inserted by tail cap, makes to insert conveniently easily, guarantee implantation site is accurate, thus reduces unnecessary operation accident and operating time prolongation.
2, the outer end of fixing tail cap described in the utility model is designed with the holding structure matched with holding instrument, internal fixtion tail cap is controlled so that hold in medical worker's operation, tail cap is avoided to come off when inserting tail cap and carrying out rotation process, prevent internal fixtion tail cap from falling in operative site soft tissue, avoid operation unexpected.
3, the tail cap head free end of fixing tail cap described in the utility model is smooth cylinder design, at utmost can reduce the excitation to surrounding soft tissue.
4, fixing tail cap described in the utility model is simple, and easy to operate, accurate, learning curve is short, does not increase operation Accessory injury, is suitable for clinical practice.
Accompanying drawing explanation
Fig. 1 is the structural representation of fixing tail cap described in the utility model.
In figure, 1-tail cap head, the adaptive section of 2-, 3-guide rod section, 4-1-screws structure, and 4-2-holds structure.
Detailed description of the invention
Illustrate below in conjunction with accompanying drawing and provide embodiment of the present utility model, by embodiment, this utility model is further described.It is important to note that detailed description of the invention of the present utility model is not limited to the form described by embodiment.
Embodiment 1
, be made up of tail cap head 1, adaptive section 2 and the guide rod section 3 designed successively along axis, overall one-tenth stepped cylindrical structure described in the present embodiment for the fixing tail cap of closed intramedullary pin centre bore tail end as shown in Figure 1.The external cylindrical surface of tail cap head is designed with the external screw thread forming thread connection with intramedullary pin centre bore tail end female thread, and external screw thread be arranged on tail cap head near adaptive section one end 2/3rds length on, the free end diameter of the tail cap head of 1/3rd remaining length is equal with the major diameter of thread on tail cap head.Tail cap end surface central design have match with screwing tool for make internal and external threads engage in hexahedro angle counterbore 4-1.At the bottom of described interior hexagonal counterbore hole, central design has the diameter matched with holding instrument to be less than the screwed hole 4-2 of interior hexagonal counter bore hole diameters, controls internal fixtion tail cap, prevent internal fixtion tail cap from falling in operative site body so that hold in medical worker's operation.The external diameter of described adaptive section is less than and close to footpath, the tail cap head externally threaded end, the end of adaptive section 2 is the cambered surface through chamfering, so that internal and external threads engagement.The diameter of described guide rod section is less than the diameter of adaptive section, so that fixing tail cap inserts in intramedullary pin centre bore.
Claims (10)
1. the fixing tail cap for closed intramedullary pin centre bore tail end, it is characterized in that for overall stepped cylindrical structure, tail cap head (1) is designed with successively along axis, adaptive section (2) and guide rod section (3), the external cylindrical surface of tail cap head is designed with the external screw thread forming thread connection with intramedullary pin centre bore tail end female thread, tail cap end surface be designed with match with screwing tool screw structure (4-1) for what make internal and external threads engage, the external diameter of adaptive section is less than and close to footpath, the tail cap head externally threaded end, so that internal and external threads engagement, the diameter of guide rod section is less than the diameter of adaptive section, so that fixing tail cap inserts in intramedullary pin centre bore.
2. according to claim 1 for the fixing tail cap of closed intramedullary pin centre bore tail end, screw structure (4-1) described in it is characterized in that for interior polyhedral angle counterbore, be positioned at tail cap head outer end central authorities.
3., according to claim 2 for the fixing tail cap of closed intramedullary pin centre bore tail end, it is characterized in that described interior polyhedral angle counterbore is interior hexahedro angle counterbore.
4. according to claim 1 or 2 or 3 for the fixing tail cap of closed intramedullary pin centre bore tail end, it is characterized in that described tail cap head outer end is designed with the holding structure (4-2) matched with holding instrument, control internal fixtion tail cap so that hold in medical worker's operation, prevent internal fixtion tail cap from falling in operative site soft tissue.
5. according to claim 4 for the fixing tail cap of closed intramedullary pin centre bore tail end, it is characterized in that the screwed hole of described holding structure (4-2) interior polyhedral angle counter bore hole diameters for diameter is less than, be positioned at central authorities at the bottom of polyhedral angle counterbore hole.
6. according to claim 1 or 2 or 3, close the fixing tail cap of intramedullary pin centre bore tail end, the screw thread that it is characterized in that on tail cap head external cylindrical surface be arranged on tail cap head near adaptive section one end 2/3rds length on.
7. close the fixing tail cap of intramedullary pin centre bore tail end according to claim 5, the screw thread that it is characterized in that on tail cap head external cylindrical surface be arranged on tail cap head near adaptive section one end 2/3rds length on.
8. according to claim 1 or 2 or 3 for the fixing tail cap of closed intramedullary pin centre bore tail end, it is characterized in that the end of described adaptive section (2) is the cambered surface through chamfering.
9. according to claim 1 or 2 or 3 for the fixing tail cap of closed intramedullary pin centre bore tail end, its feature is the cambered surface through chamfering at the end of described guide rod section (3).
10. according to claim 1 or 2 or 3 for the fixing tail cap of closed intramedullary pin centre bore tail end, its feature is equal with the major diameter of thread on tail cap head at the free end diameter of described tail cap head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420871014.6U CN204410948U (en) | 2014-12-31 | 2014-12-31 | For the fixing tail cap of closed intramedullary pin centre bore tail end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420871014.6U CN204410948U (en) | 2014-12-31 | 2014-12-31 | For the fixing tail cap of closed intramedullary pin centre bore tail end |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204410948U true CN204410948U (en) | 2015-06-24 |
Family
ID=53461369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420871014.6U Expired - Fee Related CN204410948U (en) | 2014-12-31 | 2014-12-31 | For the fixing tail cap of closed intramedullary pin centre bore tail end |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204410948U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109480986A (en) * | 2018-12-05 | 2019-03-19 | 常州市康辉医疗器械有限公司 | A kind of intramedullary nail pinning of undercut mark |
| CN109480987A (en) * | 2018-12-05 | 2019-03-19 | 常州市康辉医疗器械有限公司 | A kind of Intramedullary nailing tail cap of bion undercut mark |
-
2014
- 2014-12-31 CN CN201420871014.6U patent/CN204410948U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109480986A (en) * | 2018-12-05 | 2019-03-19 | 常州市康辉医疗器械有限公司 | A kind of intramedullary nail pinning of undercut mark |
| CN109480987A (en) * | 2018-12-05 | 2019-03-19 | 常州市康辉医疗器械有限公司 | A kind of Intramedullary nailing tail cap of bion undercut mark |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150624 Termination date: 20151231 |
|
| EXPY | Termination of patent right or utility model |