CN2282410Y - Expansion osseous pin cover - Google Patents
Expansion osseous pin cover Download PDFInfo
- Publication number
- CN2282410Y CN2282410Y CN 96234881 CN96234881U CN2282410Y CN 2282410 Y CN2282410 Y CN 2282410Y CN 96234881 CN96234881 CN 96234881 CN 96234881 U CN96234881 U CN 96234881U CN 2282410 Y CN2282410 Y CN 2282410Y
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- CN
- China
- Prior art keywords
- osseous pin
- osseous
- pin
- sleeve pipe
- tension force
- 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 utility model belongs to a medical appliance which comprises an osseous pin sleeve pipe, a tensioner, a lock pin device and a pin cover impactor. When the bone external fixing treatment is conducted, the osseous pin sleeve pipe is sheathed on the osseous pin, the tensioner is arranged at one end of the sleeve pipe, which is arranged near the lock pin device which is arranged at the end of the osseous pin. The stability of a bone external fixer is increased, infection of pin tracks can be reduced, and the fracture healing is promoted.
Description
This utility model belongs to a kind of medical apparatus and instruments.
At present, along with constantly perfect with application technology of manufacturing and designing of bone external fixator, the bone external fixation is acknowledged as one of standard method of current treatment fracture.Knee joint, ankle fusion have also been improved, the therapeutic effect of osteotomy orthopaedy and limb lengthening.In the therapeutic process of bone external fixator, fixed stability is the life of external fixation.Kempson and Campbell have done contrast by mechanical test to various external fixator solidnesses, think that the stability of external fixation at first depends on the diameter and the quantity of osseous pin, and next is only the bending hardness and the quantity of coupling bar.The diameter of pin is big more, and fixed stability is strong more, but has also increased the infringement to tissue, and the harm that pin site infection takes place is also big more.When the diameter of locking pin greater than 20% of the diameter of bone, will there be the danger that fracture takes place at the position of threading a needle.Increase the number of locking pin, also can increase the stability of external fixation, also increased the chance of injured blood vessel nerve simultaneously, corresponding external fixator parts increase, and complex structure is bulky and heavy, complicated operation.In operating process, look after pin and pin, the relation between pin and the bar is very high to the specification requirement of threading a needle.Be subjected to high rigidity between the fracture end and fix, lack stress stimulation, usually become the factor that influences union of fracture.In a word, in the evolution of bone external fixator, increase the stability while of external fixation, more or less brought such or such shortcoming.
The purpose of this utility model is a kind of tension force osseous pin cover of invention, to increase the stability of bone external fixator, simplifies the bone external fixator, reduces the shortcoming that exists in the bone external fixator smelting treatment.
Main technical schemes of the present utility model is: the tension force osseous pin cover comprises osseous pin sleeve pipe, tensioner, purl device, needle guard driver, when the bone external fixation is treated, the osseous pin cover pipe box is on osseous pin, sharp tip is butted on cortical bone, tensioner places the end by the purl device, and the purl device places the termination of osseous pin.The osseous pin sleeve pipe is made by rustless steel, and is cylindrical, is about the 1/3-1/4 of osseous pin, and internal diameter equals or is slightly larger than the osseous pin external diameter, and an end is a circular cross section, other end zigzag or slope shape, sharp section.
The utility model has the advantages that: the osseous pin sleeve pipe is butted on the both sides cortical bone, can prevent that bone fixation from becoming the angle along needle track to both sides slip and side direction.The sawtooth of osseous pin cover is embedded in the cortical bone, can prevent the rotation of bone fixation cast-over road.Tensioner makes osseous pin produce tension force, increases osseous pin rigidity, reduces the displacement that the osseous pin stress deformation causes, comprises displacement before and after needle track, overlapping, shift separation, rotates around the bone major axis.In a word, use the tension force osseous pin cover, can increase the stability of bone external fixation from all directions, and needn't increase diameter, the quantity of osseous pin, thereby minimizing is simplified external fixator to the damage of nervus vasculairs and bone fixation, is convenient to operation.Osseous pin cover can prevent that needle track from sliding, thereby significantly reduces pin site infection.When passing through osseous pin, put osseous pin cover, can prevent that osseous pin from twining soft tissue, minimizing is to the damage of soft tissue, purl device on the external fixator is fixed on the osseous pin cover, and the plus load that osseous pin bore is distributed widely on the osseous pin cover, passes to external fixator by osseous pin cover by the purl device again, avoided stress concentration certain on osseous pin a bit, reduced broken needle and take place.In fracture healing process, by the adjustment of tonicity device, reduce the tension force of osseous pin, reduce stress shielding, promote union of fracture.
The utility model is described in further detail below in conjunction with accompanying drawing:
Fig. 1 is that tension force osseous pin cover user mode figure Fig. 2 is osseous pin sleeve pipe figure
Fig. 3 is that tensioner figure Fig. 4 is purl device figure
Fig. 5 is needle guard driver figure
As shown in Figure 1, this utility model mainly is made up of osseous pin, osseous pin sleeve pipe [1], tensioner [2], purl device [3], needle guard driver [4], when the bone external fixation is treated, osseous pin sleeve pipe [1] is enclosed within on the osseous pin, tensioner [2] places the end of sleeve pipe [1] by the purl device, and purl device [3] places the termination of osseous pin.
As shown in Figure 2, osseous pin sleeve pipe [1] is made by rustless steel, and is cylindrical, long is that the 1/4-1/3 of osseous pin, internal diameter equal or be slightly larger than the osseous pin external diameter, can with the tight fit of osseous pin, can on osseous pin, slide again.About thickness of pipe wall 0.3mm.One end is circular cross sections [11], and the other end is zigzag section [12].
Tensioner and purl device [3] can be made by rustless steel, duralumin, hard alumin ium alloy, titanium alloy steel, nylon etc.
As shown in Figure 3, tensioner is made up of special nut [21], screw rod [22]; Nut [21] has screw thread and screw rod [22] to be complementary for the circular duct [211] of cover shape multiedge cylinder with holes (being six prisms among the figure, optimum state) capping and have a 4mm in covering, and the middle shaft position of screw rod also has a circular duct [221].Circular duct [211] in nut, the screw rod, the diameter of [221] have at least one be slightly larger than or equal the osseous pin external diameter, less than osseous pin sleeve pipe [1] external diameter.
As shown in Figure 4, purl device needle body [31] screw rod [32] of locking is formed, and centre drill has duct [311] on the purl body, perpendicular to axis.
As shown in Figure 5, the needle guard driver is the card pipe of band cap [42], and there is screw thread [41] no cap end tube wall inboard, can mate with screw rod [22].
The using method of tension force osseous pin cover: routine runs through osseous pin on the fixed bone of needs, respectively put an osseous pin sleeve pipe [1] at the osseous pin two ends, and its sharp end [12] is towards bone fixation.Screw rod [22] is screwed on the needle guard driver [4], is enclosed within again on the osseous pin, be butted on osseous pin cover [1].Hit needle guard driver cap portion [42], the sharp portion of osseous pin cover is embedded in the homonymy cortical bone and does not pass through cortical bone.Install semi-circular external fixator or other solid figure external fixator.Purl device [3] can not be locked on the osseous pin on the external fixator, be locked on the osseous pin sleeve pipe [1].Successively tensioner [2] and the purl device of tightening [3] is enclosed within the osseous pin two ends again, is butted on osseous pin cover, closely arrange.Tighten purl device screw, with osseous pin lock jail.With screw rod on the tensioner [22], nut [21] is suitably turned on, and pushes osseous pin open to both sides, makes osseous pin produce suitable tension force.
Claims (5)
1, a kind of tension force osseous pin cover, it is characterized in that it comprises osseous pin sleeve pipe [1], tensioner [2], purl device [3], needle guard driver [4], when the bone external fixation is treated, osseous pin sleeve pipe [1] is enclosed within on the osseous pin, sharp tip is butted on cortical bone, tensioner [2] places an end of sleeve pipe [1] purl device, and purl device [3] places the termination of osseous pin.
2, tension force osseous pin cover according to claim 1, it is characterized in that osseous pin sleeve pipe [1] is cylindrical, be about osseous pin 1/3-1/4, interior through equaling or being slightly larger than pin outside the osseous pin, one end is circular cross section [11], the zigzag of the other end or slope shape, sharp section [12].
3, tension force osseous pin cover according to claim 1, it is characterized in that tensioner [2] is made up of nut [21] and screw rod [22], nut [21] is for covering shape multiedge cylinder with holes, with six prisms is the best, capping has a circular duct [211], have screw thread and screw rod [22] to be complementary in the lid, shaft position also has a corresponding circular duct [221] in the screw rod.
4, tension force osseous pin cover according to claim 3, the diameter that it is characterized in that circular duct [211], [221] in nut, the screw rod have at least one be slightly larger than or equal the osseous pin external diameter, less than osseous pin sleeve pipe [1] external diameter.
5, tension force osseous pin cover according to claim 1 is characterized in that the card pipe of needle guard driver [4] for band cap [42], and there is screw thread [41] no cap end tube wall inboard, can mate with screw rod [22].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96234881 CN2282410Y (en) | 1996-05-16 | 1996-05-16 | Expansion osseous pin cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96234881 CN2282410Y (en) | 1996-05-16 | 1996-05-16 | Expansion osseous pin cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2282410Y true CN2282410Y (en) | 1998-05-27 |
Family
ID=33911112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96234881 Expired - Fee Related CN2282410Y (en) | 1996-05-16 | 1996-05-16 | Expansion osseous pin cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2282410Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11529238B2 (en) | 2019-09-12 | 2022-12-20 | DePuy Synthes Products, Inc. | Sleeve for percutaneous device and methods of production and use thereof |
| US11806050B2 (en) | 2020-09-21 | 2023-11-07 | DePuy Synthes Products, Inc. | Tension isolating adjustable adapter for external fixation and methods of production and use thereof |
-
1996
- 1996-05-16 CN CN 96234881 patent/CN2282410Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11529238B2 (en) | 2019-09-12 | 2022-12-20 | DePuy Synthes Products, Inc. | Sleeve for percutaneous device and methods of production and use thereof |
| US11806050B2 (en) | 2020-09-21 | 2023-11-07 | DePuy Synthes Products, Inc. | Tension isolating adjustable adapter for external fixation and methods of production and use thereof |
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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 |