CN1185988C - Elastic stress locking intramedullary nail for bone fracture intenral fixing - Google Patents
Elastic stress locking intramedullary nail for bone fracture intenral fixing Download PDFInfo
- Publication number
- CN1185988C CN1185988C CNB031348750A CN03134875A CN1185988C CN 1185988 C CN1185988 C CN 1185988C CN B031348750 A CNB031348750 A CN B031348750A CN 03134875 A CN03134875 A CN 03134875A CN 1185988 C CN1185988 C CN 1185988C
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- China
- Prior art keywords
- nail
- intramedullary nail
- pin
- fracture
- marrow
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Abstract
The present invention relates to an improvement of a twisted lock intramedullary nail for tubular bone fractures belonging to medical equipment. The twisted lock intramedullary nail comprises a stationary nail of the intramedullary nail, a dynamic nail of the intramedullary nail, an elastic element and a cylindrical pin, wherein the elastic element and the cylindrical pin are respectively installed in blind holes on the end of the stationary nail of the intramedullary nail, and an exposed end of the cylindrical pin is installed in an inner hole of the dynamic nail of the intramedullary nail in a stationary fit mode. The present invention has the advantage that broken sections of fractures always have elastic axial pressure and elastic axial stimulation in the process of fracture fixation so as to shorten the period of fracture healing and reduce patients' pain when the twisted lock intramedullary nail is extracted.
Description
Technical field
The invention belongs to medical apparatus and instruments, the improvement of interlocking intramedullary nail of particularly a kind of tubular bone fracture.
Background technology
Tubular bone fracture in the trauma fracture is the common fracture state of an illness, if delayed union, disunion or malunion that malpractice is easily fractured.For a long time, clinically the treatment tubular bone fracture is adopted more the mode of interlocking intramedullary nail location healing.Though the marrow internal fixation meets biomechanical theory, its fixation, but early functional exercise; Early loading; Prevent the cripetura of bone; Avoid fracturing axially and rotation deformity.But interlocking intramedullary nail adopts the static(al) nail static fixation of integrative-structure, has limited the axial compressive force effect and the stimulation of the disconnected section of fracture, exists certain stress shielding, causes the union of fracture cycle stretch-out.In addition, taking-up static(al) nail promotes union of fracture also to increase patient's misery unavoidably and is not accepted by the patient in fracture healing process.
Summary of the invention
Technical problem to be solved by this invention is, keep original interlocking intramedullary nail shape to the fracture fixation process in, the disconnected section of fracture exists elastic shaft to pressurization and stimulation all the time, shortens the union of fracture cycle, reduces patient suffering's internal-fixed fracture elastic stress interlocking external pin.
The technical scheme that technical solution problem of the present invention adopts is: a kind of internal-fixed fracture elastic stress interlocking external pin, it is by marrow nail static(al) nail, marrow nail power nail two parts constitute, packing has elastic component and straight pin in the blind hole of its marrow nail static(al) nail end, and straight pin exposes the termination stationary fit and is installed in the marrow nail power nail endoporus.
Above-mentioned marrow nail static(al) nails on and is provided with the localized lock pin elongated hole of straight pin, and lock pin is plugged in elongated hole and the straight pin locating hole, and its straight pin also can move in elongated hole with lock pin.
There is following beneficial effect at least in the present invention under the configuration of excellent structure: the marrow nail static(al) nail in this structure is identical with the existing marrow nail effect of using, and has the vertically function of fixing fracture; Marrow nail power nail can be followed closely the static(al) nail with marrow and vertically slide mutually, increases the power contact of the disconnected section of fracture, promotes union of fracture; Flexible member can resist muscular strength and the too high disconnected section of bone pressure, prevents the bone cripetura; Straight pin restriction marrow nail static(al) nail rotatablely moves and the lengthwise movement scope with marrow nail power nail; Lock pin avoid fracturing axially and rotation deformity.The remarkable advantage of this structure is that in to the fracture fixation process the disconnected section of fracture exists elastic shaft to pressurization and stimulation all the time, shortens the union of fracture cycle, reduces the misery of patient when taking out interlocking intramedullary nail.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure: 1 tail medicated cap, 2 marrows nail static(al) nail, 3 flexible members, 4 straight pins, 5 marrows nail power nail, 6 elongated holes, 7 lock pins.
The specific embodiment
Below in conjunction with accompanying drawing and preferred embodiment foundation concrete structure of the present invention is described in further detail:
See also shown in Figure 1, a kind of elastic dynamic interlocking intramedullary nail, it is decomposed into marrow nail static(al) nail 2 by the static(al) nail of former integrative-structure, marrow nail power nail 5, flexible member 3, straight pin 4 constitutes, and follows closely in the blind hole of 2 ends for spring element 3 and straight pin 4 are sub-packed in marrow nail static(al), and straight pin 4 exposes the termination stationary fit and is installed on marrow nail power and follows closely in 5 endoporus.Above-mentioned marrow nail static(al) nail 2 is provided with straight pin 4 localized lock pin elongated holes 6, and lock pin 7 is plugged in elongated hole and the straight pin locating hole, and its straight pin also can move in elongated hole with lock pin.Above-mentioned marrow nail static(al) is followed closely 2 afterbodys tail medicated cap 1 is housed; The tail medicated cap has the effect of sealing marrow nail tail end cavity.Marrow nail static(al) nail 2 is provided with fracture proximal locking nail hole 9, and marrow nail power nail 5 is provided with fracture distal locking nail hole 8.
The above, it only is preferred embodiment of the present invention, be not that shape of the present invention, material and structure are done any pro forma restriction, every foundation technical spirit of the present invention all belongs in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (2)
1, a kind of internal-fixed fracture elastic stress interlocking external pin, it is by marrow nail static(al) nail, marrow nail power nail two parts constitute, and packing has elastic component and straight pin in the blind hole of its marrow nail static(al) nail end, and straight pin exposes the termination stationary fit and is installed in the marrow nail power nail endoporus.
2, internal-fixed fracture elastic stress interlocking external pin according to claim 1, it is characterized in that described marrow nail static(al) nails on is provided with the localized lock pin elongated hole of straight pin, lock pin is plugged in elongated hole and the straight pin locating hole, and its straight pin also can move in elongated hole with lock pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031348750A CN1185988C (en) | 2003-09-27 | 2003-09-27 | Elastic stress locking intramedullary nail for bone fracture intenral fixing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031348750A CN1185988C (en) | 2003-09-27 | 2003-09-27 | Elastic stress locking intramedullary nail for bone fracture intenral fixing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1491617A CN1491617A (en) | 2004-04-28 |
| CN1185988C true CN1185988C (en) | 2005-01-26 |
Family
ID=34239998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031348750A Expired - Fee Related CN1185988C (en) | 2003-09-27 | 2003-09-27 | Elastic stress locking intramedullary nail for bone fracture intenral fixing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1185988C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386058C (en) * | 2006-03-07 | 2008-05-07 | 冀原 | Improvement of internal-fixed fracture elastic stress interlocking external pin |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE528331C2 (en) * | 2005-04-08 | 2006-10-24 | Eulogic Ab | Surgical pin |
| CN103006304A (en) * | 2011-09-22 | 2013-04-03 | 苏州瑞华医院有限公司 | Static and dynamic exchange-type thighbone interlocking intramedullary nail |
-
2003
- 2003-09-27 CN CNB031348750A patent/CN1185988C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386058C (en) * | 2006-03-07 | 2008-05-07 | 冀原 | Improvement of internal-fixed fracture elastic stress interlocking external pin |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1491617A (en) | 2004-04-28 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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 |