CN104434295A - Special screw driver for taking orthopaedic internal fixed slip screw - Google Patents
Special screw driver for taking orthopaedic internal fixed slip screw Download PDFInfo
- Publication number
- CN104434295A CN104434295A CN201410723461.1A CN201410723461A CN104434295A CN 104434295 A CN104434295 A CN 104434295A CN 201410723461 A CN201410723461 A CN 201410723461A CN 104434295 A CN104434295 A CN 104434295A
- Authority
- CN
- China
- Prior art keywords
- screw
- cutter head
- screw driver
- handle
- inner core
- 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
- A61B17/8875—Screwdrivers, spanners or wrenches
-
- 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
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgery (AREA)
- Biomedical Technology (AREA)
- Engineering & Computer Science (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The invention discloses a special screw driver for taking an orthopaedic internal fixed slip screw. The screw driver is mainly used for taking out the orthopaedic internal fixed slip screw, the screw driver is mainly characterized in that a head of the screw driver is inflatable and replaceable, through the use of the screw driver, the problem that the orthopaedic internal fixed slip screw is difficult to take out can be solved, and the head of the screw driver can be replaced and reused. The screw driver comprises three parts of the head of the screw driver, a handle sleeve of the screw driver and an inner core. For the screw driver disclosed by the invention, the head of the screw driver is combined with the handle sleeve of the screw driver, and then the inner core is screwed in, so that the head of the screw driver, the handle sleeve and the inner core can be firmly combined into an integral whole; at the same time, the head of the screw driver is inflated, so that holding force on a hexagonal groove wall in a tail cap of the screw is enhanced, and the slip screw can be taken out by rotating a T-shaped handle at the tail end of the screw driver. For the screw driver, the whole design is adapted to the structure of the screw, and the screw driver is quite convenient while in use. Through the use of the screw driver disclosed by the invention, the blank that an effective take-out tool aiming at the inner fixed screw is lack on the present orthopaedics clinic is hopeful to fill, a current unreasonable screw taking manner is changed, and the screw driver can become a conventional tool for clinically taking out the inner fixed screw.
Description
Technical field
The present invention relates to bone surgery specific purpose tool, be specifically related to one and get orthopaedics internal fixtion slipped screws Speical screwdriver.
Background technology
Clinical treatment extremity fracture, open reduction steel plate screw internal fixtion is conventional art formula, and screw, steel plate take out by postoperative often need.But because screw mostly is titanium alloy material, quality is softer, conventional screw-driver in order runs into large resistance lock screw, usually to cause in screw tail cap hexagonal groove destroyed because repeatedly screwing and stripped thread occurs.The current method of getting slipped screws common clinically mainly contains screwdriver method, cap method etc. of breaking through neck, its shortcoming is complex operation step, operating time extends, wound exposes for a long time, infection chance increases, and even gets nail because of violence and causes iatrogenic fracture or nerve injury.In addition, owing to lacking the special-purpose taking slipped screws instrument of standard, get nail mode many with doctor individual clinical experience, be unfavorable for the raising for the treatment of level.
Summary of the invention
For defect or the deficiency of prior art, the invention provides one and get orthopaedics internal fixtion slipped screws Speical screwdriver, it comprises cutter head, and the end of this cutter head can be arranged in the interior hexagonal groove of orthopaedics internal fixtion slipped screws tail cap, and the end of cutter head is expandable structure.
Optionally, described cutter head is hexagonal cylindricality, and this cutter head can be arranged in the interior hexagonal groove of orthopaedics internal fixtion slipped screws tail cap.
Optionally, described cutter head is hollow structure, described in get orthopaedics internal fixtion slipped screws Speical screwdriver and also comprise inner core, this inner core inserts in described cutter head, and cutter head is expanded.
Optionally, the hollow structure in described cutter head end is bullet.
Optionally, described cutter head and described inner core are threaded connection.
For the ease of operation, described inner core is provided with handle away from the end of cutter head.
Further, described orthopaedics internal fixtion slipped screws Speical screwdriver of getting also comprises handle of a knife sleeve, this handle of a knife sleeve is hollow structure, and described cutter head is arranged on one end of handle of a knife sleeve, and described inner core inserts handle of a knife sleeve and cutter head successively from the other end of described handle of a knife sleeve.
Optionally, described handle of a knife sleeve is provided with handle away from the end of cutter head.
Optionally, described inner core and described handle of a knife sleeve are threaded connection.
Concrete, one gets orthopaedics internal fixtion slipped screws Speical screwdriver, it comprises cutter head, inner core and handle of a knife sleeve, described cutter head is arranged on one end of described handle of a knife sleeve, inner core inserts in handle of a knife sleeve and cutter head in the other end of handle of a knife sleeve successively, and inner core and handle of a knife sleeve are threaded connection, inner core and cutter head are threaded connection.
Screwdriver of the present invention has expandable cutter head, increases the hold to hexagonal groove in screw tail cap, increases active force when screwing out slipped screws, taking-up slipped screws that can be simple and easy to do.
The technical characterstic of setscrew cutter of the present invention is, cutter head outer-hexagonal structure can be combined closely with hexagonal groove in screw tail cap, its end expands while being screwed into inner core, increase the hold of internal hexagonal groove, both cutter head can have been made to expand by being screwed into inner core, also three moieties into close can be made to be combined as a whole, rotate T-shaped handle, comparatively slipped screws is taken out in labour-saving.
Accompanying drawing explanation
Fig. 1 is the front view of inflatable cutter head;
Fig. 2 is the longitudinal sectional view of Fig. 1;
Fig. 3 is the cross-sectional elevational view of handle of a knife sleeve;
Fig. 4 is the cross-sectional elevational view of inner core;
Fig. 5 is the whole structure figure after the assembling of setscrew cutter;
Fig. 6 is the cross section partial enlarged drawing after cutter head expands;
In figure:
Interface after 1-cutter head, 11-inflation openings, 12-cutter head female thread, 13-cutter head terminus inner pyramidal structure, 14-cutter head end expand;
Inner core end in 2-inner core, 21-inner core end thread, 22-insertion pyramidal structure, 23-chuck, 24-hands handle;
Partial female-thread, 33-handle in 3-handle of a knife sleeve, 31-handle of a knife sleeve ends on hexagonal structure, 32-handle of a knife sleeve lining.
Detailed description of the invention
The invention provides one and get orthopaedics internal fixtion slipped screws Speical screwdriver, it comprises cutter head, and this cutter head can be arranged in the inner groovy of orthopaedics internal fixtion slipped screws tail cap.Slipped screws is dismantled orthopaedics internal fixtion slipped screws tail cap force by cutter head by staff.
Being connected reliably to ensure to install between cutter head with orthopaedics internal fixtion slipped screws tail cap, increasing hold, the end of cutter head is designed to expandable structure.Expandable structure is the expandable structure being applicable to cutter head structure of the present invention and function, such as, establishes hollow structure in cutter head end, inflation openings offered by the wall of hollow structure.
The mating shapes of the inner groovy of cutter head profile of the present invention and orthopaedics internal fixtion slipped screws tail cap, is conveniently fit into cutter head in groove.The inner groovy of orthopaedics internal fixtion slipped screws tail cap more common clinically is at present hexagonal structure, and accordingly, cutter head can be designed to hexagonal cylindricality, during work, is loaded in hexagonal groove by cutter head.
A concrete scheme, segment design becomes hollow structure, and its end is expandable structure, is inserted in cutter head, the expandable structure of cutter head end is expanded by the inner core of a rod-like structure.Concrete, the end of inner core is provided with external screw thread, and the inwall of cutter head is provided with female thread, and both are fitted together by thread set.Further, occur fully to expand in order to ensure cutter head end, the internal diameter of cutter head end is less than the external diameter of inner core end.Preferably, the hollow structure part of cutter head end can be designed to pyramidal structure, and inner core is inserted into the vertex of a cone from the cone end and cutter head end is expanded.
One more specifically scheme is, above-mentioned cutter head, inner core are assembled in a handle of a knife sleeve, and involved handle of a knife sleeve is hollow structure, and cutter head is arranged in handle of a knife sleeve, and be that the part of cutter head is arranged in handle of a knife sleeve, inner core inserts in handle of a knife sleeve and cutter head successively in the other end of handle of a knife sleeve.About the contact method between three, following structure can be selected: cutter head inwall establishes that female thread is established in the inwall of female thread, handle of a knife sleeve local, the end of inner core establishes external screw thread, like this, after inner core inserts handle of a knife sleeve, cutter head, the screw thread of inner core end realizes assembly and connection with the partial screw threads in handle of a knife sleeve, the screw-threaded engagement in cutter head successively.Screwdriver under this concrete scheme, the cutter head on it is consumptive material, changes in time as required, and handle of a knife sleeve and inner core can life-time service.
For controlling the length in inner core insertion handle of a knife sleeve, or for guaranteeing the engagement between each part mentioned above screw thread, inner core is provided with chuck, prevents inner core from excessively stretching in handle of a knife sleeve.
For ease of operated by personnel, the end away from cutter head of handle of a knife sleeve and inner core is provided with handle, and optionally, handle shape can be designed to T-shaped structure.
Under the structure of T-handle, cutter head, handle of a knife sleeve and inner core can form a T-shaped screwdriver, and are T-type structure after three sections fit, and entire length is approximately 120mm;
Cutter material of the present invention can select stainless steel.
Research shows, mostly screw stripped thread is clinically in the process of getting nail cannot rotating screw, makes repeated attempts and causes hexagonal groove wearing and tearing in screw tail cap, cause the hold of the hexagonal cutter head of conventional screw-driver in order obviously to decline, cannot take out slipped screws.Therefore, lack and special get slipped screws instrument, often cause doctor effectively cannot process slipped screws, and easily iatrogenic injury is caused to patient when getting nail by force.Therefore, the present invention is special devises inflatable cutter head for driver bit to this problem that declines of hexagonal groove hold in screw tail cap, and cutter head is replaceable simultaneously, and handle of a knife sleeve and inner core can reuse, and are truly solving screw stripped thread problem.
Below in conjunction with accompanying drawing, explanation is further explained to the present invention.
The profile of cutter head of the present invention and expandable structure can select structure shown in Fig. 1, and cutter head 1 outer surface is hexgonal structure, can with hexagonal groove tabling in screw tail cap; Cutter head 1 end has inflation openings 11 to be expanded to make cutter head 1;
Package assembly between cutter head 1 of the present invention and inner core 2 can select structure as shown in Figure 2, and when cutter head end has hollow structure inside 13 that inner core is screwed into, cutter head is expanded; Inner core 2 is screwed into by cutter head female thread 12, and inner core 2 is provided with chuck 23, prevents inner core from excessively stretching in handle of a knife sleeve 3.
Cutter head 1 of the present invention, package assembly between handle of a knife sleeve 3 and inner core 2 can select structure as shown in Figure 3 and Figure 4, in handle of a knife sleeve ends hexagonal structure 31 can with hexagonal cutter head tabling; Partial female-thread 32 on handle of a knife sleeve lining and the screw thread on inner core 2 coincide; The T-shaped handle 33 of barrel end, can make operator be convenient to rotary integral structure to screw out slipped screws; Inner core end thread 21 can match with the helicitic texture on cutter head 1, handle of a knife sleeve 3, three's strong bonded is integrated, convenient operation; Inner core 2 near-end chuck 23, can avoid inner core 2 to be excessively screwed into; The T-shaped handle 24 of inner core near-end can make operator be convenient to be screwed into inner core 2.
Structure after cutter head 1 of the present invention, assembling between handle of a knife sleeve 3 and inner core 2 can select structure as shown in Figure 5 and Figure 6, and its cutter head end is inflatable.After being screwed into inner core, cutter head end expands.
Be below the specific embodiment that inventor provides, the present invention can apply but be not limited to this embodiment.
embodiment:
With reference to figure 1,2,3,4.The screwdriver of this embodiment comprises: cutter head 1, handle of a knife sleeve 3 and inner core 2.
Cutter head 1 is hollow structure, and profile is hexagonal cylindricality, and end has been provided with inflation openings 11; Cutter head 1 is arranged in handle of a knife sleeve ends in hexagonal structure 31, and the partial female-thread 32 simultaneously on cutter head female thread 12 and handle of a knife sleeve lining can coincide mutually with inner core end thread 21, makes three parts firmly become as a whole; When being screwed into inner core 2, inner core end 22 structure inserted in pyramidal structure is cylindrical, and it makes the cutter head terminus inner hollow structure 13 of bullet expand the interface 14 after expanding to cutter head end, completes expansion process.
The whole use procedure of screwdriver is as follows:
First cutter head 1 is embedded in handle of a knife sleeve 3, hexagonal groove in the outer-hexagonal structure of cutter head 1 and screw is combined;
The T-shaped handle 33 of handle of a knife barrel end is used to be fixed on screw by handle of a knife sleeve 3 and cutter head 1;
Utilize the T-shaped handle 24 of inner core near-end to be screwed into inner core, while being screwed into, operator tightly fixes cutter head 1 and handle of a knife sleeve 3 on screw, avoids slippage; When being screwed into inner core 2, the partial female-thread 32 on cutter head female thread 12 and handle of a knife sleeve lining can coincide mutually with inner core end thread 21;
Continue to be screwed into inner core until the position of chuck 23 again, now the T-shaped handle of handle of a knife sleeve and the T-shaped handle of inner core parallel to each other; Cutter head end expands completely, increases cutter head to hexagonal groove hold in screw; Swivel knife sleeve cylinder 3 again, takes out slipped screws.
Operation principle of the present invention is, when being screwed into inner core, the screw thread of cutter head inside and the screw thread of handle of a knife sleeve inner can coincide mutually with the screw thread of inner core, make three parts firmly become as a whole; Hollow structure inside boundary line simultaneously because of cutter head end tilts, and completes cutter head and expands; Cutter head outer-hexagonal wall significantly increases the pressure of hexagonal groove in screw, thus increases driver bit to the hold of screw, is taken out by slipped screws.
Claims (10)
1. get an orthopaedics internal fixtion slipped screws Speical screwdriver, it is characterized in that, it comprises cutter head, and the end of this cutter head can be arranged in the inner groovy of orthopaedics internal fixtion slipped screws tail cap, and the end of cutter head is expandable structure.
2. get orthopaedics internal fixtion slipped screws Speical screwdriver as claimed in claim 1, it is characterized in that, described cutter head is hexagonal cylindricality, and this cutter head can be arranged in the interior hexagonal groove of orthopaedics internal fixtion slipped screws tail cap.
3. get orthopaedics internal fixtion slipped screws Speical screwdriver as claimed in claim 1, it is characterized in that, described cutter head is hollow structure, described in get orthopaedics internal fixtion slipped screws Speical screwdriver and also comprise inner core, this inner core inserts in described cutter head, and cutter head is expanded.
4. get orthopaedics internal fixtion slipped screws Speical screwdriver as claimed in claim 3, it is characterized in that, the hollow structure in described cutter head end is bullet.
5. get orthopaedics internal fixtion slipped screws Speical screwdriver as claimed in claim 3, it is characterized in that, described cutter head and described inner core are threaded connection.
6. get orthopaedics internal fixtion slipped screws Speical screwdriver as claimed in claim 3, it is characterized in that, described inner core is provided with handle away from the end of cutter head.
7. get orthopaedics internal fixtion slipped screws Speical screwdriver as claimed in claim 3, it is characterized in that, described orthopaedics internal fixtion slipped screws Speical screwdriver of getting also comprises handle of a knife sleeve, this handle of a knife sleeve is hollow structure, described cutter head is arranged on one end of handle of a knife sleeve, and described inner core inserts handle of a knife sleeve and cutter head successively from the other end of described handle of a knife sleeve.
8. get orthopaedics internal fixtion slipped screws Speical screwdriver as claimed in claim 7, it is characterized in that, described handle of a knife sleeve is provided with handle away from the end of cutter head.
9. get orthopaedics internal fixtion slipped screws Speical screwdriver as claimed in claim 7, it is characterized in that, described inner core and described handle of a knife sleeve are threaded connection.
10. get orthopaedics internal fixtion slipped screws Speical screwdriver as claimed in claim 1, it is characterized in that, it comprises cutter head, inner core and handle of a knife sleeve, described cutter head is arranged on one end of described handle of a knife sleeve, inner core inserts in handle of a knife sleeve and cutter head in the other end of handle of a knife sleeve successively, and inner core and handle of a knife sleeve are threaded connection, inner core and cutter head are threaded connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410723461.1A CN104434295A (en) | 2014-11-07 | 2014-12-02 | Special screw driver for taking orthopaedic internal fixed slip screw |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410625112 | 2014-11-07 | ||
| CN2014106251126 | 2014-11-07 | ||
| CN201410723461.1A CN104434295A (en) | 2014-11-07 | 2014-12-02 | Special screw driver for taking orthopaedic internal fixed slip screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104434295A true CN104434295A (en) | 2015-03-25 |
Family
ID=52881582
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420748655.2U Expired - Fee Related CN204306894U (en) | 2014-11-07 | 2014-12-02 | One gets orthopaedics internal fixtion slipped screws Speical screwdriver |
| CN201410723461.1A Pending CN104434295A (en) | 2014-11-07 | 2014-12-02 | Special screw driver for taking orthopaedic internal fixed slip screw |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420748655.2U Expired - Fee Related CN204306894U (en) | 2014-11-07 | 2014-12-02 | One gets orthopaedics internal fixtion slipped screws Speical screwdriver |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN204306894U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110623722A (en) * | 2019-09-26 | 2019-12-31 | 河北医科大学第三医院 | Broken intramedullary nail main nail extracting device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204306894U (en) * | 2014-11-07 | 2015-05-06 | 中国人民解放军第四军医大学 | One gets orthopaedics internal fixtion slipped screws Speical screwdriver |
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| US5951554A (en) * | 1997-10-02 | 1999-09-14 | Holmes; Russell P. | Screw removal system |
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| CN2852974Y (en) * | 2005-12-20 | 2007-01-03 | 程琮 | Broken nail extractor for osteology |
| CN201079439Y (en) * | 2007-10-15 | 2008-07-02 | 谢学升 | Screw barrel and screwdriver integrated broken nail extractor |
| CN201286760Y (en) * | 2008-10-13 | 2009-08-12 | 孙玉东 | Broken nail remover for bone surgery |
| CN101856265A (en) * | 2010-06-02 | 2010-10-13 | 王书军 | Extractor of orthopedic slipped screws |
| CN202184791U (en) * | 2011-07-18 | 2012-04-11 | 牟宗友 | Broken bolt withdrawing device for orthopeadic surgery |
| CN102813548A (en) * | 2012-08-21 | 2012-12-12 | 杨铁毅 | Intramedullary nail extractor |
| CN202682036U (en) * | 2012-03-31 | 2013-01-23 | 翟延荣 | Wire sliding prevention bolt and hollow locking screwdriver matched with the same |
| CN103750897A (en) * | 2014-01-16 | 2014-04-30 | 青岛华仁技术孵化器有限公司 | Orthopaedic broken screw removing device and using method thereof |
| CN204306894U (en) * | 2014-11-07 | 2015-05-06 | 中国人民解放军第四军医大学 | One gets orthopaedics internal fixtion slipped screws Speical screwdriver |
-
2014
- 2014-12-02 CN CN201420748655.2U patent/CN204306894U/en not_active Expired - Fee Related
- 2014-12-02 CN CN201410723461.1A patent/CN104434295A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0929264B1 (en) * | 1996-03-14 | 2004-09-01 | Howmedica Osteonics Corp. | Apparatus and method for implant insertion |
| US5951554A (en) * | 1997-10-02 | 1999-09-14 | Holmes; Russell P. | Screw removal system |
| DE29816215U1 (en) * | 1998-09-09 | 1998-11-12 | Aesculap Ag & Co Kg | Insertion tool for a bone screw |
| DE20316629U1 (en) * | 2002-11-30 | 2004-01-22 | Ferber, Ottfried, Dr. | Surgical slide hammer for removing medullary nails has exchangeable expansion tips with different surfaces to engage ends of nails |
| US20050033307A1 (en) * | 2003-08-05 | 2005-02-10 | Cook Michael A. | Locking surgical instrument |
| CN2772460Y (en) * | 2005-03-25 | 2006-04-19 | 宋朝晖 | Hollow screw drawing-out device |
| CN2852974Y (en) * | 2005-12-20 | 2007-01-03 | 程琮 | Broken nail extractor for osteology |
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| CN102813548A (en) * | 2012-08-21 | 2012-12-12 | 杨铁毅 | Intramedullary nail extractor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110623722A (en) * | 2019-09-26 | 2019-12-31 | 河北医科大学第三医院 | Broken intramedullary nail main nail extracting device |
| CN110623722B (en) * | 2019-09-26 | 2022-07-26 | 河北医科大学第三医院 | Broken intramedullary nail main nail extracting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN204306894U (en) | 2015-05-06 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150325 |
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| RJ01 | Rejection of invention patent application after publication |