CN1021542C - Intramedullary split-fixator - Google Patents
Intramedullary split-fixator Download PDFInfo
- Publication number
- CN1021542C CN1021542C CN89105880A CN89105880A CN1021542C CN 1021542 C CN1021542 C CN 1021542C CN 89105880 A CN89105880 A CN 89105880A CN 89105880 A CN89105880 A CN 89105880A CN 1021542 C CN1021542 C CN 1021542C
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- CN
- China
- Prior art keywords
- split
- guide pin
- intramedullary
- guide
- tip
- 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
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Abstract
The present invention relates to an intramedullary split fixer, which belongs to an internal fixing device for bone fractures. The intramedullary split fixer is composed of a guide pin and 2 to 3 fixing needles, wherein the guide pin comprises a head part, a needle body and a tip part, and the head part is fixed by a screw cap. The guide pin is provided with 2 to 3 longitudinal guide grooves for the fixing needles to penetrate; the guide grooves is provided with an arc channel near the tip part, and the arch channel gradually bends from interior to exterior; the tail end of the arc channel has an opening. Each fixing needle comprises a head part, a needle body and a tip part, wherein the head part is expanded, and the tip part is slightly sharp. When the fixing needles are inserted along the guide slots on the guide pin and after the fixing needles penetrate through the arc channel and the opening, the tip parts of the fixing needles outwards extend to split and are inserted in a marrow cavity.
Description
The invention belongs to the bone fracture internal fixing device tool.Existing bone fracture internal fixing device tool, as common synthetism steel plate, pressurization synthetism steel plate, Ender nail, quincunx intramedullary pin and self-locking intramedullary pin etc., though can reach fixation to long bone fracture, in its shortcoming: 1, undesirable to long bone distal section fixation of fractures; 2, expose in the operation wide, damage is big, to sclerotin and blood thereof for grievous injury is all arranged; 3, can make a big impact to function of joint owing to operation technique.In addition as U.S. Pat 4,457.301 the disclosed marrow inner fixer that constitutes by locking pin and elasticity fuse, because for the cannelure on the elasticity fuse of locking pin insertion usefulness is open type, it is unstable and again can not bifurcated that locking pin inserts the back, thereby exist locking pin and insert the unstable shortcoming in back in the marrow.The objective of the invention is to avoid above-mentioned weak point of the prior art, disclose a kind of intramedullary split-fixator that can firmly fix key each section fracture.
Purpose of the present invention realizes by following measure, be that the present invention is made up of 2～3 locking pins and a guide pin, 2～3 closed vertical guide grooves for the interspersed usefulness of locking pin are arranged on the guide pin, guide groove has one to be crooked gradually from inside to outside arc road near the tip, one opening is arranged, when 2～3 locking pins insert along closed guide groove on the guide pin, after passing arc road and opening on the arc road, the locking pin tip is outwards stretched and is formed bifurcated, and securely intercalation in medullary cavity or/and in the spongy bone.
The present invention is exactly the special construction that utilizes this fixed apparatus itself, in conjunction with the anatomic form characteristics of long bone, to reach fixedly securing of fracture site.
Below in conjunction with accompanying drawing structure of the present invention and assemble method are described.
Fig. 1: guide pin structure chart
(1) head (2) nail body
(3) tip (4) nut
(5) closed guide groove (6) arc road
(7) arc road opening
Fig. 2: locking pin sketch map
(8) head (9) needle body (10) tip
Fig. 3: closed vertical guide groove cross-sectional view
Fig. 4: arc road cross-sectional view
Fig. 5: intramedullary split-fixator general assembly drawing
With reference to accompanying drawing: the present invention is made up of a guide pin (see figure 1) and 2～3 locking pin (see figure 2)s.Guide pin divides head (1), nail body (2) and tip three parts such as (3).Head (1) is fixing with nut (4); 2～3 closed vertical guide grooves (5) for the interspersed usefulness of locking pin are arranged on the guide pin.Guide groove (5) has one to be from inside to outside near tip (3), gradually Wan Qu arc road (6); One opening (7) is arranged on the arc road.Locking pin divides head (8), needle body (9) and tip three parts such as (10).Head (8) expands, the little point in tip (10).After 2～3 locking pins passed arc road (6) and opening (7) along guide groove (5), diverged gradually locking pin tip (10), outwards stretch and form bifurcated, intercalation in medullary cavity or/and in the spongy bone.In addition, the head of guide pin (1) then utilizes nut (4) fixing to guide pin head (1).
Compared with the prior art, advantage of the present invention is:
1, can firmly fix key each section fracture site of long bone, especially superior to the fixation of long bone distal section fracture, it can effectively control rotation, prevents that fracture site from separating.
Though 2, this intramedullary split-fixator is by ossis, because volume is little thin, so very little to blood vessel damage in sclerotin, ossis and the pulp cavity. And perform the operation to operate and mainly do not carry out at fracture end, and processing ease, therefore the interference to fracture site is also few, so be conducive to union.
3, this intramedullary split-fixator by the joint, though its head end is retained in juxtra-articular, does not affect joint motion, so guarantee intact function of joint.
Claims (2)
1, a kind of intramedullary split-fixator, it is made up of 2～3 locking pins and a guide pin, it is characterized in that: 2～3 closed vertical guide grooves (5) for the interspersed usefulness of locking pin are arranged on the guide pin, guide groove (5) has one to be crooked gradually from inside to outside arc road (6) near tip (3), and opening (7) is arranged on arc road (6).When 2～3 locking pins insert along closed guide groove (5) on the guide pin, after passing arc road (6) and opening (7); Locking pin tip (3) is outwards stretched and is formed bifurcated, and securely intercalation in medullary cavity or/and in the spongy bone.
2, intramedullary split-fixator according to claim 1 is characterized in that: its guide pin head (1) has nut fixed parts such as (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89105880A CN1021542C (en) | 1989-03-23 | 1989-03-23 | Intramedullary split-fixator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89105880A CN1021542C (en) | 1989-03-23 | 1989-03-23 | Intramedullary split-fixator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1036693A CN1036693A (en) | 1989-11-01 |
| CN1021542C true CN1021542C (en) | 1993-07-14 |
Family
ID=4856514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN89105880A Expired - Fee Related CN1021542C (en) | 1989-03-23 | 1989-03-23 | Intramedullary split-fixator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1021542C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8119327B2 (en) * | 2002-03-28 | 2012-02-21 | Huntsman Advanced Materials Americas Llc | Polymerisable composition |
| CN103860252A (en) * | 2014-03-07 | 2014-06-18 | 中国人民解放军第四军医大学 | Medical anchor type cancellous bone screw |
-
1989
- 1989-03-23 CN CN89105880A patent/CN1021542C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1036693A (en) | 1989-11-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |