CN2293297Y - Self-pressing intramedullary pin - Google Patents
Self-pressing intramedullary pin Download PDFInfo
- Publication number
- CN2293297Y CN2293297Y CN 97210628 CN97210628U CN2293297Y CN 2293297 Y CN2293297 Y CN 2293297Y CN 97210628 CN97210628 CN 97210628 CN 97210628 U CN97210628 U CN 97210628U CN 2293297 Y CN2293297 Y CN 2293297Y
- Authority
- CN
- China
- Prior art keywords
- fracture
- utility
- model
- jacks
- bone
- 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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- Surgical Instruments (AREA)
Abstract
The utility model relates to a self-pressing intramedullary pin. The present bone nail for curing fracture is commonly provided with round jacks that are symmetrically distributed up and down. The bone nail is completely fixed with the position of the bone, and the broken ends of the fracture can not get definite compressive stress. Thus the healing of the fracture can not be accelerated. Ellipse-shaped jacks are arranged on a needle body of the utility model, and the circle jacks and the ellipse-shaped jacks are distributed at intervals. The compressive stress generated by the body is acted on the screw bolt, and interspace for the moving down of the screw bolt is arranged in the ellipse-shaped jack. The compression stress is acted on the broken ends of the fracture through the bone, and the healing of the fracture can be accelerated. The healing time can be shortened by one quarter by using the utility model as compred with the exiting bone nail.
Description
This utility model belongs to orthopedic medical device.
At present, the latch intramedullary needle and the pressurization intramedullary needle that are used for fracture (femur, tibia) treatment all are the jacks that is symmetrically distributed up and down generally, penetrate bolt in jack, thereby fixing fracture site prevents that fracture site from rotating.But because this intramedullary needle and backbone's position is completely fixed, the compressive stress that health produces directly acts on downwards by needle body, and fracture site is subjected to less than certain compressive stress, therefore can not accelerating bone healing.
Be to provide order of the present utility model a kind of can be in the union of fracture overall process with the intramedullary needle of health action of compressive stress in fracture site.
The purpose of this utility model realizes by technical scheme shown in the drawings.The jack that is symmetrically distributed is up and down arranged on this utility model needle body, and this utility model has the Long Circle jack, and wherein circular socket holes and Long Circle jack are spaced apart.
After adopting said structure, on the bolt of action of compressive stress in slotted hole that health produces, bolt has the space that moves down in slotted hole, compressive stress is acted on the fracture site by the backbone, so just the healing that can quicken to fracture.Use the novel comparable existing intramedullary needle of this reality to shorten healing time 1/4th.
Accompanying drawing 1 is the subjective figure of this utility model;
Accompanying drawing 2 is this utility model side view.
Provide embodiment of the present utility model below.
Long 490 millimeters of pin, wide 15 millimeters, the termination of pin is that rectangle is pulled out pin hole, pulling out pin hole inboard is 6 millimeters circular socket holes for diameter, distance of center circle pulls out 7 millimeters of pin hole inner edges, and the circular socket holes inboard is a Long Circle jack, and the radius of a circle at Long Circle jack two ends is 3 millimeters, the intermediary length of two semicircles is 10 millimeters, 4 millimeters of Long Circle hole and circular port edge minimum distances.By above-mentioned range distribution, have 15 circular holes and 15 slotted holes on the needle body.The needle body cross section is 1.5 millimeters in thickness, the upper and lower limit of " worker " font, 12 millimeters of needle body groove widths, 1 millimeter of thick middle.
Claims (1)
1. a self-pressurization intramedullary needle has the circular socket holes that is symmetrically distributed up and down on the needle body, it is characterized in that also having the Long Circle jack on the needle body, and circular socket holes and Long Circle jack are spaced apart.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97210628 CN2293297Y (en) | 1997-01-28 | 1997-01-28 | Self-pressing intramedullary pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97210628 CN2293297Y (en) | 1997-01-28 | 1997-01-28 | Self-pressing intramedullary pin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2293297Y true CN2293297Y (en) | 1998-10-07 |
Family
ID=33929466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97210628 Expired - Fee Related CN2293297Y (en) | 1997-01-28 | 1997-01-28 | Self-pressing intramedullary pin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2293297Y (en) |
-
1997
- 1997-01-28 CN CN 97210628 patent/CN2293297Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |