CN209529315U - A kind of neck of femur hollow screw guide pin positioning device - Google Patents
A kind of neck of femur hollow screw guide pin positioning device Download PDFInfo
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- CN209529315U CN209529315U CN201820257560.9U CN201820257560U CN209529315U CN 209529315 U CN209529315 U CN 209529315U CN 201820257560 U CN201820257560 U CN 201820257560U CN 209529315 U CN209529315 U CN 209529315U
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- guide pin
- screw
- lock
- neck
- femur
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Abstract
The utility model discloses a kind of neck of femur hollow screw guide pin positioning devices, including pedestal and the standpipe being vertically fixed on pedestal, the first lock-screw is threaded on the upper end outer wall of standpipe, it is locked in one end insertion standpipe upper end of U-tube and by the first lock-screw, the second lock-screw is threaded on the other end outer wall of U-tube, it is locked in the upper end insertion U-tube of central shaft rod and by the second lock-screw, it is fixedly connected with the first fixed block in central shaft rod lower end, is fixedly connected with vertical panel in the bottom center of the first fixed block.The utility model can be realized the external positioning of neck of femur central axes by positioning device, guide pin is disposably just penetrated to by needle guiding device the ideal position of femur again after the completion of positioning, to realize the accurate positioning of guide pin, it avoids penetrating guide pin repeatedly, procedure efficiency is improved, patients surgery wound and intraoperative blood loss are substantially reduced and reduces the risk of postoperative infection.
Description
Technical field
The present invention relates to a kind of neck of femur hollow screw guide pin positioning devices, belong to the field of medical instrument technology.
Background technique
Hip Fracture disease incidence continues to increase, according to statistics, to the year two thousand fifty, in the crowd of 45 years old or greater age, hip
The number of the infected of fracture every year on average is between 458000~1037000.Most of patient is the elderly, but the hair of young crowd
Sick rate is also increasing, and main cause is attributed to young patient and takes place frequently with biggish activity or motor vehicle accident.With displacement
Fracture of neck of femur, for example gerontal patient, best therapeutic modality is total hip replacement or hemiarthroplasty.Such as Fig. 4 and
Shown in Fig. 5, the common treatment method of young patient is after the reduction of the fracture using the fixed fracture sites 24 of three pieces of hollow screws 25,
Hollow screw 25 treats the fracture of neck of femur 22 following main points on surgical technic:
1, fracture site 24 obtains good reset, and most of patient can be drawn suffering limb by traction table and obtain good reset；
2, the spatial position of three pieces of hollow screws 25 should be in inverted triangle structure on the section perpendicular to 22 central axes of neck of femur
Type.Specific distribution: first needle --- inserting needle direction be through femur square, be on 22 P-A Cephalomatrics of neck of femur in 1/3, in stock
It is to the rear on 22 lateral projection of bone neck；Second needle --- inserting needle direction is to be on 22 P-A Cephalomatrics of neck of femur through bone trabecula infall
In 1/3, it is placed in the middle on 22 lateral projection of neck of femur；Third root needle --- inserting needle direction be through tension bone trabecula, neck of femur 22 just
It is to the front on 22 lateral projection of neck of femur in China and foreign countries 1/3 on bit slice；
3, the length of hollow screw 25 should be suitable, can not wear out articular surface, this step can be held by X-ray examination in art and be closed
Suitable depth of needle.Quoted from " Campbell's bone surgery ", volume 6.
After guide pin penetrates target position, hollow hollow screw 25 is inserted in guide pin, revolves hollow screw 25 along guide pin
Enter neck of femur 22, then exits guide pin again.At this point, hollow screw 25 just penetrates into target position, operation also just succeeds,
The hollow screw 25 as shown in attached drawing 4 and Fig. 5 will be obtained to be distributed.In this process, guide pin is penetrated into 22 target position of neck of femur
Set the step of being the difficult point and most critical of the operation.However, the anatomical features special due to neck of femur 22, and by thick around
Thick soft tissue covers, and in art is difficult that guide pin is disposably penetrated suitable position.Most of surgeon perforate needle when
It waits, is all by rule of thumb " blind to wear ", then to judge whether position of the guide pin in neck of femur 22 be suitable by surgical radiograph perspective,
If guide pin position is dissatisfied, penetrated again after needing to exit guide pin, or even multiple thread a needle cannot obtain satisfaction, this is not
Only increase wound to patient, and increase operating time, increases patient and the exposure of doctor's radioactive ray.If patient experience is insufficient or
It does not have an X-rayed in time, or even guide pin is pierced by target area, penetrate the blood vessel or nerve of surrounding, cause serious operation concurrent
Disease.
Neck of femur 22 is cylinder-like structure, is the bridge for connecting femoral head and femoral shaft 23, neck of femur 22 and femoral shaft 23
Between there are two important structure:
1, collodiaphyseal angle: the angle formed between neck of femur 22 and femoral shaft 23, normal value are 110 °~140 °；
2, top rake: when lower limb neutral position, the angle that neck of femur 22 is formed on Coronal with femoral shaft 23, average out to
15 ° or so.
Inserting needle anisotropy is the main reason for fixed early stage of hollow screw 25 fails after leading to neck of femur 22: if guide pin
It is too big with 23 angle of femoral shaft, easily pass through 22 inside cortex of neck of femur；Angle is too small, and hollow screw 25 is easily made to pass through neck of femur
22 lateral cortex；And guide pin point is excessively backwards, easily passes through 22 rear side cortex of neck of femur；Guide pin point is excessively facing forward, easily passes through front side
Cortex.Therefore, the position of guide pin must well adapt to the collodiaphyseal angle and top rake of neck of femur 22, can just make the operation obtain at
Function.
Summary of the invention
In view of the above technical problems, the present invention provide a kind of structure be simple and convenient to operate, the neck of femur of registration it is hollow
Screw guide pin positioning device avoids penetrating repeatedly so as to ensure that guide pin is disposably just penetrated to the ideal position of neck of femur
Guide pin improves procedure efficiency, substantially reduces operating time, operation wound and intraoperative blood loss amount.
Technical solution of the present invention: a kind of neck of femur hollow screw guide pin positioning device, including pedestal and vertical fixation
Standpipe on pedestal, is threaded with the first lock-screw on the upper end outer wall of standpipe, and one end of U-tube is inserted on standpipe
It is locked in end and by the first lock-screw, is threaded with the second lock-screw, axis on the other end outer wall of U-tube
It is locked in the upper end insertion U-tube of bar and by the second lock-screw, it is rectangular to be fixedly connected with first in central shaft rod lower end
Body fixed block is fixedly connected with vertical panel in the bottom center of the first cuboid fixed block, in the first cuboid fixed block
Center is equipped with horizontal concrete chute, and third lock-screw is threaded on the side wall of horizontal concrete chute, and one end of the first sliding panel is inserted
Enter in horizontal concrete chute and be locked by third lock-screw, it is rectangular to be fixedly connected with second in the other end of the first sliding panel
Body fixed block offers vertical chute on the second cuboid fixed block, is threaded with the 4th on the side wall of vertical chute
The upper end insertion vertical chute of lock-screw, the second sliding panel is interior and is locked by the 4th lock-screw, in the second sliding
The lower end of plate is fixedly connected with curved panel, offers left arc chute respectively in the left and right sides of curved panel and right arc is sliding
Slot slidably connects a slide bar in left arc chute and right arc chute, and one end of two slide bars, which is connected to, leads
The both ends of needle sleeve are respectively connected with sliding lock in the other end of two slide bars.
Further, the center of circle corresponding to the left arc chute and right arc chute is the same center of circle.
Further, the central axes of the vertical panel and guide pin sleeve in the same plane, and the plane pass through central shaft rod
Axial line and and horizontal plane.
Further, graduation mark is provided on the outside of the left arc chute and right arc chute.
Further, graduation mark is provided on first sliding panel and the second sliding panel.
Due to the adoption of the above technical scheme, the present invention has the advantages that the present invention can be realized by positioning device in body
Outer orientation direction guide pin disposable wearing enters the target position in neck of femur, to avoid penetrating guide pin repeatedly, improves procedure efficiency,
Substantially reduce patients surgery wound and intraoperative blood loss amount.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the structural schematic diagram of curved panel and guide pin sleeve；
Fig. 3 is the structural schematic diagram when present invention is implemented；
Fig. 4 is schematic diagram when screw screws in neck of femur target position；
Fig. 5 is the sectional view of Fig. 4.
Description of symbols: 1- pedestal, 2- standpipe, the first lock-screw of 3-, 4-U type pipe, the second lock-screw of 5-, 6-
Central shaft rod, 7- the first cuboid fixed block, 8- vertical panel, 9- horizontal concrete chute, the second sliding panel of 10-, the second cuboid of 11-
Fixed block, the 4th lock-screw of 12-, the first sliding panel of 13-, the right arc chute of 14-, the left arc chute of 15-, 16- curved panel,
17- guide pin sleeve, 18- third lock-screw, 19- vertical chute, 20- slide bar, 21- sliding lock, 22- neck of femur, 23- femoral shaft,
24- fracture site, 25- hollow screw.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and examples to this hair
It is bright to be described in further detail.
The embodiment of the present invention: the structural schematic diagram of neck of femur hollow screw guide pin positioning device is as shown in Figures 1 and 2,
Including pedestal 1 and the standpipe being vertically fixed on pedestal 12, the first locking screw is threaded on the upper end outer wall of standpipe 2
Nail 3, one end of U-tube 4 are inserted into 2 upper end of standpipe and are locked by the first lock-screw 3, the other end outer wall of U-tube 4
On be threaded with the second lock-screw 5, it is in the upper end insertion U-tube 4 of central shaft rod 6 and solid by the locking of the second lock-screw 5
It is fixed, it is fixedly connected with the first cuboid fixed block 7 in 6 lower end of central shaft rod, is fixed in the bottom center of the first cuboid fixed block 7
It is connected with vertical panel 8, horizontal concrete chute 9 is offered at the center of the first cuboid fixed block 7, on the side wall of horizontal concrete chute 9
It is threaded with third lock-screw 18, one end insertion horizontal concrete chute 9 of the first sliding panel 13 is interior and passes through third lock-screw
18 are locked, and are fixedly connected with the second cuboid fixed block 11 in the other end of the first sliding panel 13, solid in the second cuboid
Determine to offer vertical chute 19 on block 11, the 4th lock-screw 12 is threaded on the side wall of vertical chute 19, second is sliding
It is locked in the upper end insertion vertical chute 19 of movable plate 10 and by the 4th lock-screw 12, in the lower end of the second sliding panel 10
It is fixedly connected with curved panel 16, offers left arc chute 15 and right arc chute respectively in the left and right sides of curved panel 16
14, a slide bar 20, one end difference of two slide bars 20 are slidably connected in left arc chute 15 and right arc chute 14
The both ends of guide pin sleeve 17 are connected to, are respectively connected with sliding lock 21 in the other end of two slide bars 20.
Further, the center of circle corresponding to the left arc chute 15 and right arc chute 14 is the same center of circle.
Further, the central axes of the vertical panel 8 and guide pin sleeve 17 in the same plane, and the plane pass through axis
The axial line of bar 6 and and horizontal plane.
Further, the outside of the left arc chute 15 and right arc chute 14 is provided with graduation mark.
Further, graduation mark is provided on first sliding panel 13 and the second sliding panel 10.
Following steps implementation can be used using above-mentioned neck of femur hollow screw guide pin positioning device referring to Fig. 3:
(1) preoperative that patient is placed on traction table, after traction reduction fracture site 24, the suffering limb of patient is placed in water
Simultaneously 15 ° of inward turning of prosposition, it is in 22 central axes of neck of femur in horizontal plane；
(2) after patient sets position, a Kirschner wire is put in front of neck of femur 22, then with X-ray examination normotopia in art
Piece, adjust Kirschner wire, make Kirschner wire be projected on 22 P-A Cephalomatrics of neck of femur be in in 1/3, at this time with marker pen along this
Kirschner wire draws the first mark line, and pass through the first mark line and have perpendicular to the face of horizontal plane and only one, it is flat labeled as α
Face；
(3) one piece of Kirschner wire is put in lateral side of femur, then with 22 side of X-ray examination neck of femur position in art, adjusts Kirschner wire
Position makes outside Kirschner wire projection be parallel to 22 long axis of neck of femur, and to the rear on 22 lateral projection of neck of femur, then with marker pen edge
This Kirschner wire draw the second mark line, and pass through the second mark line and the face that is parallel to the horizontal plane has and only one, be labeled as β
Plane；
(4) α plane and β plane are two orthogonal planes, and intersecting lens is the destination channel of first guide pin,
Because only that the intersection in the two faces could be on P-A Cephalomatrics with the first label line overlap, while it again can be on lateral projection with second
Mark line overlap；According to the method for step (2) and step (3), the Kirschner wire of P-A Cephalomatrics and lateral projection is set, is made at its projection
It in above-mentioned target position and marks, the destination channel of second guide pin and third guide pin can be obtained；
(6) when obtaining first guide pin after the mark line of normotopia and side position, the pedestal 1 of guide pin positioning device is put in and is led
Draw by bed, the height of vertical panel 8 is adjusted by the first lock-screw 3 and the second lock-screw 5, and make vertical panel 8 in
Shaft 6 rotates, and makes the bottom edge of vertical panel 8 and the first label line overlap, then locks the first lock-screw 3 and the second locking screw
Nail 5, vertical panel 8 and α plane are same plane at this time；
(6) guide pin sleeve 17 is adjusted, intersects the central axes of guide pin sleeve 17 with the second mark line, at this time guide pin sleeve 17
Central axes be in β plane, according to the preparatory design of the device, the central axes of guide pin sleeve 17 are also in α plane, according to
Two orthogonal planes have and the mathematical principle of only one intersection, and the central axes of guide pin sleeve 17 at this time are α flat
The intersection in face and β plane, the destination channel of as first guide pin, the guide pin penetrated at this time along guide pin sleeve 17 necessarily penetrate
Target position in neck of femur 22；
(7) second and third root guide pin destination channel is obtained after the label of body surface positive side position, according to step (5) and step (6)
The method of description can complete the operation of threading a needle of second guide pin Yu third guide pin.
When threading a needle, when outside cortical bone is touched at guide pin tip, curved panel 16 is translated in the horizontal direction, makes arcwall face
The outer ledge of plate 16 is concordant with the mark line on guide pin.The purpose of this step is the circle for making guide pin tip become outer arc
The distance of the heart, guide pin point to guide pin mark line is just the radius of outer arc, in this way when needing to adjust guide pin needle angle,
May insure it is to adjust needle angle using guide pin tip as the center of circle.
Claims (5)
1. a kind of neck of femur hollow screw guide pin positioning device, including pedestal (1) and the standpipe being vertically fixed on pedestal (1)
(2), it is characterised in that: be threaded on the upper end outer wall of standpipe (2) the first lock-screw (3), one end of U-tube (4)
It is locked in insertion standpipe (2) upper end and by the first lock-screw (3), is threadedly coupled on the other end outer wall of U-tube (4)
Have the second lock-screw (5), be locked in upper end insertion U-tube (4) of central shaft rod (6) and by the second lock-screw (5),
It is fixedly connected with the first cuboid fixed block (7) in central shaft rod (6) lower end, in the bottom center of the first cuboid fixed block (7)
Vertical panel (8) are fixedly connected with, horizontal concrete chute (9) are offered at first cuboid fixed block (7) center, in horizontal concrete chute
(9) it is threaded on side wall third lock-screw (18), in one end insertion horizontal concrete chute (9) of the first sliding panel (13) simultaneously
It is locked by third lock-screw (18), is fixedly connected with the second cuboid in the other end of the first sliding panel (13) and fixes
Block (11) offers vertical chute (19), the spiral shell on the side wall of vertical chute (19) at second cuboid fixed block (11) center
Line is connected with the 4th lock-screw (12), and upper end insertion vertical chute (19) of the second sliding panel (10) is interior and passes through the 4th locking
Screw (12) is locked, and curved panel (16) is fixedly connected in the lower end of the second sliding panel (10), in curved panel (16)
The left and right sides offer left arc chute (15) and right arc chute (14) respectively, it is sliding in left arc chute (15) and right arc
A slide bar (20) is slidably connected in slot (14), one end of two slide bars (20) is connected to the two of guide pin sleeve (17)
End, is respectively connected with sliding lock (21) in the other end of two slide bars (20).
2. neck of femur hollow screw guide pin positioning device according to claim 1, it is characterised in that: the left arc chute
(15) and the center of circle corresponding to right arc chute (14) is the same center of circle.
3. neck of femur hollow screw guide pin positioning device according to claim 1, it is characterised in that: the vertical panel
(8) and the central axes of guide pin sleeve (17) in the same plane, and the plane by central shaft rod (6) axial line and and horizontal plane
Vertically.
4. neck of femur hollow screw guide pin positioning device according to claim 1, it is characterised in that: the left arc chute
(15) and on the outside of right arc chute (14) it is provided with graduation mark.
5. neck of femur hollow screw guide pin positioning device according to claim 1, it is characterised in that: first sliding panel
(13) and on the second sliding panel (10) it is provided with graduation mark.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820257560.9U CN209529315U (en) | 2018-02-13 | 2018-02-13 | A kind of neck of femur hollow screw guide pin positioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820257560.9U CN209529315U (en) | 2018-02-13 | 2018-02-13 | A kind of neck of femur hollow screw guide pin positioning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209529315U true CN209529315U (en) | 2019-10-25 |
Family
ID=68244012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820257560.9U Expired - Fee Related CN209529315U (en) | 2018-02-13 | 2018-02-13 | A kind of neck of femur hollow screw guide pin positioning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209529315U (en) |
-
2018
- 2018-02-13 CN CN201820257560.9U patent/CN209529315U/en not_active Expired - Fee Related
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191025 Termination date: 20200213 |
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| CF01 | Termination of patent right due to non-payment of annual fee |