CN201510342U - Gun type reduction forceps - Google Patents
Gun type reduction forceps Download PDFInfo
- Publication number
- CN201510342U CN201510342U CN2009202228411U CN200920222841U CN201510342U CN 201510342 U CN201510342 U CN 201510342U CN 2009202228411 U CN2009202228411 U CN 2009202228411U CN 200920222841 U CN200920222841 U CN 200920222841U CN 201510342 U CN201510342 U CN 201510342U
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- inner sleeve
- jaw
- width
- trocar sheath
- reduction forceps
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Abstract
The utility model discloses a gun type reduction forceps which comprises an inner sleeve, an outer sleeve and a parallel compression clamp, wherein the tail portions of the inner sleeve and the outer sleeve are both provided with two plane grooves, the widths of the first plane grooves of the inner sleeve and the outer sleeve are the same, the width of the second plane groove of the outer sleeve is larger than the width of the second plane groove of the inner sleeve, the parallel compression clamp is hinged in five points, the head portion of the parallel compression clamp is provided with two jaws, the first jaw is a partial circular groove, and the second jaw is a straight groove, the width of the first jaw is the same as the width of the first plane grooves of the inner sleeve and the outer sleeve, the width of the second jaw is the same as the width of the second plane groove of the inner sleeve, the first jaw and the second jaw of the parallel compression clamp are respectively inserted in the first plane groove and the second plane groove of the inner sleeve and the outer sleeve, and the second jaw can drive the inner sleeve to axially move in the outer sleeve. The gun type reduction forceps is unable to shield vision field during use, is conveniently assembled and detached, has stable and reliable reduction performance, and has excellent guide performance when a top screw is implanted. The gun type reduction forceps has excellent appliance prospects and market prospect.
Description
Technical field
This utility model relates to a kind of reduction forceps that is used for the operation of spinal column way of escape nail-stick system, specifically a kind of rifle formula reduction forceps.
Technical background
At present, often use spinal column way of escape nail-stick system to treat for the diseases such as wound, degeneration and lateral bending deformity of cervical vertebra and breast lumbar vertebra.Traffic stud rod internal fixation system is made up of pedicle screw (and vertebral lamina hook) and pitman behind the spinal column.When bone surgery, be screwed into two row's pedicle screws often earlier respectively in the both sides of a plurality of vertebral bodys, respectively two row's pedicle screws are coupled together with two pitmans then.Practice shows: be screwed in epicentral two row's pedicle screws, it highly often exposes not point-blank, and position in the horizontal direction also not point-blank, as seen, is difficult to row's (a string) pedicle screw be coupled together with straight shape pitman quickly.For this reason, need in the operation to use positor that pitman is out of shape slightly, make in its upper shed U-lag that enters pedicle screw (being called pressure bar clinically), or pitman is indeformable substantially, and make pedicle screw upwards lift (together with vertebral body), make the open slot of pedicle screw block pitman (be called clinically and reset) after lifting.
Restoring backbone pincers common on the existing market are the breast-stroke reduction forceps, as shown in Figure 1, it is to be provided with handle 5 at the rear portion of inner sleeve 4, termination one pressure device 6 before the handle 5, this pressure device 6 connects a short and small trocar sheath 7, and this trocar sheath 7, inner sleeve 4 and handle 5 all are in same plane.Though this structure can play pressure bar effect and pedicle screw reset response.1), the forefront pressure body is long-pending big and near the end, the doctor visual field in use is subject to block, and not only prolongs operating time, even seriously can influence surgical effect but there are 2 deficiencies in it:.2), inner sleeve is shorter.When passing inner sleeve with the plug screw bottle opener plug screw be screwed in the pedicle screw head, do not have due guide effect because inner sleeve is short, thereby make the nut of plug screw misalignment screw head, increase operating time, increase operation risk.
In addition, know from Cha Xin: existing patent " a kind of rifle formula reduction forceps ".1), from structure and power transmission relation this rifle formula reduction forceps has the following disadvantages:: it is with the rotation between the handle of front and back, converts axle sleeve to and promotes moving forward and backward between the axostylus axostyle.When rotating between front hand grip and the promotion axostylus axostyle must be that existing rotation has slip (in the sliding tray of front hand grip) again, and axial force is bigger during work, so frictional resistance between the two is bigger, and is easy to be stuck after using a period of time, so service life is low.2), gripping sleeve and axle sleeve are two assemblies that part is connected as a single entity.In the art, when plug screw being passed from gripping sleeve, do not have due guide effect owing to gripping sleeve is short, thereby make the female thread of plug screw misalignment screw head, prolong operating time, increase operation risk with the plug screw bottle opener.3), handle and sleeve pipe be set as one, can not take apart, area occupied is big when putting in the workbox, carries inconvenience.
In sum, need really in the market a kind of simple in structure, long service life, stable performance and do not keep off the used rifle formula reduction forceps of reduction forceps, especially posterior cervical nail-stick system in the visual field.
The utility model content
The purpose of this utility model is to provide a kind of easy to use, stable performance, does not keep off the rifle formula reduction forceps of the visual field, long service life.
For achieving the above object, this utility model is taked following technical scheme:
A kind of rifle formula reduction forceps, described rifle formula reduction forceps comprises that inner sleeve, trocar sheath and parallel compression clamp.
Described trocar sheath is sheathed on outside the inner sleeve, and inner sleeve is longer than trocar sheath; The afterbody of described inner sleeve and trocar sheath is equipped with two pairs of plane grooves: wherein the first plane groove width of inner sleeve and trocar sheath is identical; Second plane groove then is that the trocar sheath width is greater than the inner sleeve width.Described parallel compression pincers are five point articulated parallel compression pincers, and its head is provided with two jaws, is respectively first jaw and second jaw.The described first jaw cross section is a partial circle groove shape, and second jaw is a linear type groove shape.The width of described first jaw is identical with the inside and outside telescopic first plane groove width; And the width of second jaw is identical with the second plane groove width of inner sleeve.First jaw and second jaw of parallel compression pincers can insert inside and outside telescopic first plane groove and second plane groove respectively.Second jaw can drive inner sleeve and move axially in trocar sheath.
Above-mentioned rifle formula reduction forceps: inner sleeve is provided with fairlead, is provided with pin in the trocar sheath, can move axially between the inside and outside sleeve pipe but rotatable.
Above-mentioned rifle formula reduction forceps: described parallel compression pincers are provided with handle, and handle inside is provided with spring leaf, under this spring leaf effect, can upspring automatically after handle is compressed.
Above-mentioned rifle formula reduction forceps: wherein, described inner sleeve termination is the U-shaped open slot, forms two rubber-like arc-like sheets.
Above-mentioned rifle formula reduction forceps: wherein, the inwall of described inner sleeve termination is provided with the part annular boss that can block the screw annular groove.
Above-mentioned rifle formula reduction forceps: wherein, described inner sleeve and trocar sheath are the ladder sleeve pipe, and all are that end diameter strengthens.
Advantage of the present utility model and beneficial effect are as follows:
1) this utility model is a gun type of gas burner, and inside and outside quill does not block the visual field to longer dimension during use, can increase the efficient and the success rate of operation.
2) this utility model is simple in structure, stable performance.When parallel compression pliers grip unclamped, the U-shaped opening elastic head of inner sleeve leant out trocar sheath.This moment, the U-shaped mouth of inner sleeve opened, and the boss in the U-shaped mouth can grasp the annular groove of screw head easily, and feel is obvious; When parallel compression pliers grip compresses, trocar sheath moves forward along inner sleeve, make inner sleeve U-shaped mouth hold the screw that (inner sleeve U-shaped opening can not outwards open) need reset tightly, thereby pitman can be pressed in the U-lag of pedicle screw, or pedicle screw (together with cone) upwards lifted, reach the purpose that resets.
3) inside and outside sleeve pipe of the present utility model and parallel compression pincers can Fast Installation, take apart fast, be convenient to clean, be easy to carry, deposit and take up room for a short time, and during operation technique, parallel compression pincers can not deviate from from inside and outside sleeve pipe, and are easy to use.
4) relative motion between the inside and outside sleeve pipe of the present utility model is promoted by parallel compression pincers, i.e. power transmission relation is reasonable in design, does not have the frictional resistance that is subjected to force direction.
5) inner sleeve of the present utility model can well play guide effect.Be in the art, when jackscrew being passed from inner sleeve, because the endoporus of inner sleeve is very long, so can play guide effect, i.e. the female thread that the jackscrew screw thread can good alignment screw head with screwdriver.Shorten operating time, reduce operation risk.
Below in conjunction with the drawings and specific embodiments this utility model is described in further details, present embodiment only is this utility model preferred forms, is not to qualification of the present utility model.
Description of drawings
Fig. 1 is the prior art structural representation;
Fig. 2 is this utility model structural representation;
Fig. 3 is the inside and outside sleeve pipe confined state of a this utility model sketch map ();
Fig. 4 is the inside and outside sleeve pipe confined state of a this utility model sketch map (two);
Fig. 5 is this utility model inner sleeve structural representation ();
Fig. 6 is this utility model inner sleeve structural representation (two);
Fig. 7 is an A portion enlarged drawing among Fig. 5;
Fig. 8 is Fig. 6 K-K portion cutaway view-inner sleeve gathering sill sketch map;
Fig. 9 is this utility model outer sleeve structure sketch map ();
Figure 10 is this utility model outer sleeve structure sketch map (two);
Figure 11 is the parallel compression wrench structure of a this utility model sketch map;
Figure 12 is this utility model first jaw structural representation;
Figure 13 is this utility model second jaw structural representation.
The specific embodiment
To shown in Figure 12, a kind of rifle formula reduction forceps, described rifle formula reduction forceps comprise inner sleeve 1, trocar sheath 2 and parallel compression pincers 3 as Fig. 2; Described trocar sheath 2 is sheathed on outside the inner sleeve 1, and inner sleeve 1 is longer than trocar sheath 2; The afterbody of described inner sleeve and trocar sheath is equipped with two plane grooves: wherein inner sleeve first plane groove 11 is identical with trocar sheath first plane groove 21 width; And trocar sheath second plane groove 22 width are greater than the inner sleeve second plane groove width 12.Described parallel compression pincers 3 are the parallel compression pincers of five point articulated formulas, promptly have 33 two parallel jaws of two handles, and parallel jaw is respectively: first jaw 31 and second jaw 32.Described first jaw, 31 axial cross sections are the part-circular groove, and second jaw 32 is the linear groove; Described first jaw, 31 width are identical with inside and outside sleeve pipe first plane groove 11,21 width; Second jaw, 32 width are identical with inner sleeve second plane groove 12.Second plane groove, 22 width of trocar sheath are greater than second jaw, 32 width and inner sleeve second plane groove 22 width.The cross section part-circular groove footpath of first jaw 31 is identical with the external diameter of inner sleeve 1, so inner sleeve 1 external diameter can move axially in the part-circular groove of first jaw 31.This moves axially by second jaw 32 and drives.
This utility model lumps together inside and outside casing pipe sleeve in use, and with 11,21 alignment of inside and outside telescopic first plane groove, compression handles is inserted inside and outside telescopic first, second plane groove with first, second two jaws of parallel compression pincers simultaneously.The width of first jaw 31 is identical with the width of inside and outside sleeve pipe first plane groove 11,21.The internal diameter of first jaw 31 is identical with the external diameter of inner sleeve 1, so can relatively move between the two.Second plane groove 12 of inner sleeve 1 is lived in 32 blockings of second jaw, can drive inner sleeve 1 and move axially.This moves axially by first jaw 31 and drives.
In use, at first some pedicle screws are separately fixed on the vertebral body, then pitman are placed in this a string pedicle screw U-lag, at this moment, may put to advance in the U-lag part of pitman.Rifle formula reduction forceps U-shaped port is packed into pedicle screw, and make annular boss 14 on the U-shaped port block the annular groove of the screw head of a nail.Compress parallel compression pliers grip, second jaw 32 drives inner sleeve and pedicle screw moves backward.Like this, just can reach the purpose that upwards lifts the vertebral body screw or the purpose of pressure bar downwards, promptly play reset response.
This utility model is a gun type of gas burner, does not block the visual field during use; Parallel compression design frictional resistance is little; But simple to operate, stable performance Fast Installation, take apart fast, be convenient to clean, be easy to carry, shorten operating time, reduce operation risk.
Claims (6)
1. a rifle formula reduction forceps is characterized in that, described rifle formula reduction forceps comprises that inner sleeve, trocar sheath and parallel compression clamp;
Described trocar sheath is sheathed on outside the inner sleeve, and inner sleeve is longer than trocar sheath; The afterbody of described inner sleeve and trocar sheath is equipped with two plane grooves: wherein the first plane groove width of inner sleeve and trocar sheath is identical; Second plane groove then is that the trocar sheath width is greater than the inner sleeve width; Described parallel compression pincers are five point articulated formulas, and its head is provided with two jaws, is respectively first jaw and second jaw; Described first jaw is the part-circular groove, and second jaw is the linear groove; Described first width of jaw is identical with the inside and outside telescopic first plane groove width; And the width of second jaw is identical with the second plane groove width of inner sleeve; First jaw and second jaw of parallel compression pincers can insert inside and outside telescopic first plane groove and second plane groove respectively, and second jaw can drive inner sleeve and move axially in trocar sheath.
2. rifle formula reduction forceps according to claim 1 is characterized in that inner sleeve is provided with gathering sill, and trocar sheath is provided with pin, can move axially between the inside and outside sleeve pipe but rotatable.
3. rifle formula reduction forceps according to claim 1 is characterized in that, described parallel compression pincers are provided with handle, and handle inside is provided with spring leaf, under this spring leaf effect, can upspring automatically after handle is compressed.
4. rifle formula reduction forceps according to claim 1 is characterized in that described inner sleeve termination is the U-shaped open slot, forms two rubber-like arc-like sheets.
5. rifle formula reduction forceps according to claim 1 is characterized in that, described inner sleeve termination inwall is provided with the part annular boss that can block the screw annular groove.
6. rifle formula reduction forceps according to claim 1 is characterized in that described inner sleeve and trocar sheath are the ladder sleeve pipe, and all is that end diameter strengthens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202228411U CN201510342U (en) | 2009-09-22 | 2009-09-22 | Gun type reduction forceps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202228411U CN201510342U (en) | 2009-09-22 | 2009-09-22 | Gun type reduction forceps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201510342U true CN201510342U (en) | 2010-06-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202228411U Expired - Lifetime CN201510342U (en) | 2009-09-22 | 2009-09-22 | Gun type reduction forceps |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201510342U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102973314A (en) * | 2011-09-07 | 2013-03-20 | 常州市康辉医疗器械有限公司 | Thoracolumbar spine posterior minimally invasive bone cement spine internal fixation system and application |
-
2009
- 2009-09-22 CN CN2009202228411U patent/CN201510342U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102973314A (en) * | 2011-09-07 | 2013-03-20 | 常州市康辉医疗器械有限公司 | Thoracolumbar spine posterior minimally invasive bone cement spine internal fixation system and application |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Beijing Keyi Bunn medical equipment science and Technology Co Ltd Assignor: Guo Qian Contract record no.: 2010990000801 Denomination of utility model: Gun type reduction forceps Granted publication date: 20100623 License type: Exclusive License Record date: 20100930 |
|
| ASS | Succession or assignment of patent right |
Owner name: BEIJING LIBEIER BIO-ENGINEERING INSTITUTE CO., LTD Free format text: FORMER OWNER: GUO QIAN Effective date: 20121012 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100089 HAIDIAN, BEIJING TO: 100176 DAXING, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20121012 Address after: 100176 Beijing branch of Beijing economic and Technological Development Zone No. 2 201-220 Street 100 Patentee after: Beijing Libeier Bioengineering Research Institute Co., Ltd. Address before: Wanliu City No. 11 building, 100089 Beijing City, Haidian District Changchun Road No. 4 Building 804B Patentee before: Guo Qian |
|
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Beijing Keyi Bunn medical equipment science and Technology Co Ltd Assignor: Guo Qian Contract record no.: 2010990000801 Date of cancellation: 20121011 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100623 |
|
| CX01 | Expiry of patent term |