CN103961176A - General intramedullary nail extractor - Google Patents
General intramedullary nail extractor Download PDFInfo
- Publication number
- CN103961176A CN103961176A CN201410224936.2A CN201410224936A CN103961176A CN 103961176 A CN103961176 A CN 103961176A CN 201410224936 A CN201410224936 A CN 201410224936A CN 103961176 A CN103961176 A CN 103961176A
- Authority
- CN
- China
- Prior art keywords
- intramedullary nail
- intramedullary
- general
- extractor
- nail extractor
- 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.)
- Pending
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/92—Impactors or extractors, e.g. for removing intramedullary devices
- A61B17/921—Impactors or extractors, e.g. for removing intramedullary devices for intramedullary devices
Abstract
The invention discloses a general intramedullary nail extractor which comprises a screw, a conic connecting rod and a circular handle. The rear end of the screw is connected with the circular handle through the conic connecting rod and the front end of the screw is provided with a conic head, wherein the front end of the screw and the conic head are integrally formed. External threads clamped into inner wall threads on the tail portion of an intramedullary nail are arranged on the conic head. A circular through hole allowing a pinch bar to penetrate through is formed in the connecting rod. Due to the fact that the front end of the screw is provided with the conic head with the external threads, intramedullary nails which are produced by different manufacturers and have different inner diameters can be smoothly extracted under the condition that the cross sections are not aligned, adaptability of the general intramedullary nail extractor is improved, and the intramedullary nails can be extracted at will due to the fact that the conic head can be inserted into the tail portions of the intramedullary nails of any type. Meanwhile, the circular through hole allowing the pinch bar to penetrate through is formed in the connecting rod, and when the conic head of the intramedullary nail extractor needs to be clamped into the corresponding intramedullary nail, the intramedullary nail and the extractor can be fastened together by inserting the pinch bar into the hole and then screwing the pinch bar to the tail portion of the intramedullary nail through threads.
Description
Technical field
The invention belongs to technical field of medical instruments, relate to a kind of general-purpose intramedullary nail extractor.
Background technology
Along with the development of technique for fixing in intramedullary pin, this technology has been widely used in medical domain.Fixing in so-called marrow, refer to built-in, the inner matter with some strength good with human compatibility of pulp cavity at bone far-end or near-end, to reach the fixing method of fracture end.
In intramedullary pin, fixation application is existing historical for many years in fracture internal fixation treatment.In intramedullary pin, fix the fracture that not only can be applicable to straight shape bone, also can be used for the fracture of slight arc bone, reach 3 fixing objects, and can carry out in early days functional exercise, in clinical practice, showing very strong vitality.
After intramedullary pin internal fixation operation, need to, according to patient's recovery situation, arrange to take out the operation of intramedullary pin.At present, be mainly by the inner thread phase interlock with intramedullary pin afterbody by the screw thread on extractor top, the mode of extracting intramedullary pin, takes out intramedullary pin.
But, the present inventor's discovery, in operation practical operation, due to the restriction of operative incision and operation position, extractor placement direction is often difficult to make the accurate interlock of screw thread, smoothly nail pulling.And extractor is thicker, need enough appearing just to insert.And the intramedullary pin internal diameter that domestic current different manufacturers is produced is different, about 5mm-12mm not etc., does not cause while taking-up and must use the supporting apparatus of former factory, and the scope of application of this intramedullary nail extractor is restricted, and in the time taking out, cross section must be aimed at and could take out, and causes taking-up not smooth.
And due to the intramedullary pin of each hospital application different manufacturers, the intramedullary pin that different manufacturers provides is slightly variant in model, specification.Examine (internal fixation operation) hospital while getting inside-fixture at non-head, outer court is preoperative cannot be determined intramedullary pin product type, specification, be dispatched from the factory period by X-ray, follows closely tail bore, screw specification.Therefore, when interior fixing taking-up operation, usually because apparatus does not mate, there is being difficult to the difficult situation of taking-up.
Summary of the invention
The present invention, in order to solve the problems of the technologies described above, provides a kind of general-purpose intramedullary nail extractor, can the in the situation that of misalignment cross section, take out smoothly the different intramedullary pin of internal diameter that different manufacturers is produced, and has improved the adaptability of this intramedullary nail extractor.
The present invention is achieved through the following technical solutions:
A kind of general-purpose intramedullary nail extractor, comprise screw rod, taper connection bar and round handle, described spiro rod rear end is connected with round handle by taper connection bar, described screw front end is provided with conical nose integrated with it, on conical nose, be provided with the external screw thread in the inner thread that is engaged to intramedullary pin afterbody, on described taper connection bar, offer the manhole penetrating for ripping bar.
Two symmetrical sides of described screw rod offer respectively draw-in groove.
On the conical nose of described screw rod, also offer groove.
Described external screw thread total length is 25mm.
The minimum diameter of described conical nose is 5mm, and maximum gauge is 15mm.
Compared with prior art, the present invention has following useful technique effect:
General-purpose intramedullary nail extractor provided by the invention, by screw front end being arranged to externally threaded conical nose, can overcome in actual operation operation, the extractor placement direction that cross section causes of can not accurately aiming at bringing due to the restriction of operative incision and operation position is often difficult to make the accurate interlock of screw thread, the problem of nail pulling smoothly, this conical nose can insert in the intramedullary pin afterbody of disposable type, therefore can arbitrarily take out intramedullary pin.Thereby this extractor is a universal extractor, it can be common to the intramedullary pin that takes out various companies, all size and various brands.Simultaneously, on connecting rod, offer the manhole penetrating for ripping bar, when need to snapping in intramedullary pin by the conical nose of extractor, band can, by insert ripping bar in this hole, then its screw thread be screwed on intramedullary pin afterbody, and intramedullary pin and extractor are fastened to one.
Further, offer respectively draw-in groove by two symmetrical sides at screw rod, thereby can use spanner to snap on extractor, this intramedullary pin is taken out.
Brief description of the drawings
Fig. 1 is general-purpose intramedullary nail extractor structural representation provided by the invention.
Wherein: 1 is hands handle; 2 is connecting rod; 3 is screw rod; 4 is external screw thread; 5 is manhole; 6 is draw-in groove.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail:
Referring to Fig. 1, a kind of general-purpose intramedullary nail extractor, comprise screw rod 3, taper connection bar 2 and round handle 1, described screw rod 3 rear ends are connected with round handle 1 by taper connection bar 2, described screw rod 3 front ends are provided with conical nose integrated with it, the minimum diameter of described conical nose is 5mm, maximum gauge is 15mm, on conical nose, be provided with the external screw thread 4 in the inner thread that is engaged to intramedullary pin afterbody, described external screw thread 4 total lengths are 25mm, on described connecting rod 2, offer the manhole 5 penetrating for ripping bar, two symmetrical sides of described screw rod 3 offer respectively draw-in groove 6, spanner is snapped on draw-in groove 6, turning spanner takes out intramedullary pin, and also offer groove on the conical nose of described screw rod 3.Make because screw rod 3, taper connection bar 2 and round handle 1 adopt medical stainless steel material, therefore hardness is high, and this conical nose carries external screw thread, and therefore can quick random be inserted in intramedullary pin, takes out intramedullary pin.
Using method of the present invention:
By the inner thread phase interlock with intramedullary pin afterbody through operative incision with externally threaded conical nose of this intramedullary nail extractor, then snap on draw-in groove intramedullary pin is taken out by spanner.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and description, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (5)
1. a general-purpose intramedullary nail extractor, it is characterized in that, comprise screw rod (3), taper connection bar (2) and round handle (1), described screw rod (3) rear end is connected with round handle (1) by taper connection bar (2), described screw rod (3) front end is provided with conical nose integrated with it, on conical nose, be provided with the external screw thread (4) in the inner thread that is engaged to intramedullary pin afterbody, on described taper connection bar (2), offer the manhole (5) penetrating for ripping bar.
2. general-purpose intramedullary nail extractor according to claim 1, is characterized in that, two symmetrical sides of described screw rod (3) offer respectively draw-in groove (6).
3. general-purpose intramedullary nail extractor according to claim 1, is characterized in that, on the conical nose of described screw rod (3), also offers groove.
4. general-purpose intramedullary nail extractor according to claim 1, is characterized in that, described external screw thread (4) total length is 25mm.
5. general-purpose intramedullary nail extractor according to claim 1, is characterized in that, the minimum diameter of described conical nose is 5mm, and maximum gauge is 15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410224936.2A CN103961176A (en) | 2014-05-26 | 2014-05-26 | General intramedullary nail extractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410224936.2A CN103961176A (en) | 2014-05-26 | 2014-05-26 | General intramedullary nail extractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103961176A true CN103961176A (en) | 2014-08-06 |
Family
ID=51231514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410224936.2A Pending CN103961176A (en) | 2014-05-26 | 2014-05-26 | General intramedullary nail extractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103961176A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107349008A (en) * | 2017-07-12 | 2017-11-17 | 王丰岩 | Damage screw and take out drill bit and device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE735333C (en) * | 1938-02-20 | 1943-05-12 | Hans Wilhelm Seidel | Nail puller for bone nails with internal thread in the nail head |
| CN1984611A (en) * | 2004-03-24 | 2007-06-20 | 新特斯(美国)公司 | Extraction tool |
| CN201431507Y (en) * | 2009-06-15 | 2010-03-31 | 郭谦 | Intramedullary nail connecting rod |
| CN201453370U (en) * | 2009-06-29 | 2010-05-12 | 吴争鸣 | extractor for various interlocking intramedullary nails |
| WO2010131020A1 (en) * | 2009-05-12 | 2010-11-18 | Cambridge University Hospitals Nhs Foundation Trust | Extraction tool |
| CN203861336U (en) * | 2014-05-26 | 2014-10-08 | 陈军 | Universal intramedullary nail extractor |
-
2014
- 2014-05-26 CN CN201410224936.2A patent/CN103961176A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE735333C (en) * | 1938-02-20 | 1943-05-12 | Hans Wilhelm Seidel | Nail puller for bone nails with internal thread in the nail head |
| CN1984611A (en) * | 2004-03-24 | 2007-06-20 | 新特斯(美国)公司 | Extraction tool |
| WO2010131020A1 (en) * | 2009-05-12 | 2010-11-18 | Cambridge University Hospitals Nhs Foundation Trust | Extraction tool |
| CN201431507Y (en) * | 2009-06-15 | 2010-03-31 | 郭谦 | Intramedullary nail connecting rod |
| CN201453370U (en) * | 2009-06-29 | 2010-05-12 | 吴争鸣 | extractor for various interlocking intramedullary nails |
| CN203861336U (en) * | 2014-05-26 | 2014-10-08 | 陈军 | Universal intramedullary nail extractor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107349008A (en) * | 2017-07-12 | 2017-11-17 | 王丰岩 | Damage screw and take out drill bit and device |
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140806 |