CN86207647U

CN86207647U - Special surgical instrument for 3-wing screw fastener

Info

Publication number: CN86207647U
Application number: CN 86207647
Authority: CN
Inventors: 陈杰喜
Original assignee: ZUNYI DISTRICT HOSPITAL
Current assignee: ZUNYI DISTRICT HOSPITAL
Priority date: 1986-10-09
Filing date: 1986-10-09
Publication date: 1988-08-24

Abstract

The utility model relates to a special medical surgical instrument matched with a three-wing screw nail inner fixer (the application number is 85204561, and the date of application is on Oct. 24th, 1985). When a femoral neck of a lower limb fractures, in the process of treatment, a three-wing screw nail is used as an inner fixer, and the special surgical instrument can lead the three-wing screw nail inner fixer to be conveniently arranged in the femoral neck of the affected limb. The instrument of the utility model comprises a center drill, a special hand drill, a hollow twist drill, a socket wrench, a cross rotary nail screwdriver, a handle, a special screw tap, an oblique sinker concave scraper, a three-edge opening device, a solid sleeve device, a hollow sleeve device, a strong spring clip, etc.

Description

Special surgical instrument for 3-wing screw fastener

This utility model relates to a kind of medical surgical instrument, the special-purpose operating theater instruments of using when especially treating fracture of femoral neck.

The treatment fracture of femoral neck adopts the method that installs inner fixer additional, nearly 76 kinds of existing over one hundred year history, inner fixer kind, and three wings drive screw inner fixer is state-of-the art up to now inner fixer.

The purpose of this utility model provides a kind of and the matching used special-purpose operating theater instruments of three wings drive screw inner fixer.

The special-purpose operating theater instruments of three wings multiple screws device that this utility model provides by centre drill, special-purpose hand drill, hollow fluted drill, box spanner, cross revolve crow-bar, handle, special screw tap, tiltedly the recessed scraper of countersunk head, three swords open circuit device, solidly make the cover device, hollow cover device and the brute spring folders etc. beaten are formed.

The operating position of above-mentioned apparatus is as follows:

The operator at first adopts epidural anesthesia, after resetting with screw traction, through the downward thigh lateral longitudinal incision of greater trochanter, get out into nail centre bore with centre drill on the cortical bone at 2～3cm place under tuberosity, penetrate the guide pin of ideal position through this hole, the positive side bit parallel in about 2cm place is gone into locking pin in this stylus printer above this guide pin, when preventing precession screw (3), femoral head rotates, and avoids this pin to intersect with advancing to follow closely, and making into, nail is obstructed.Then, according to the degree of depth that guide pin enters, select the screw (3) that is of convenient length.Hollow fluted drill is enclosed within on the guide pin holes, the aperture equals footpath (footpath, the end) outside the hollow bushing of three wings sleeve pipe (2), and hole depth is the length of three wings sleeve pipe (2), extracts guide pin.Then enter to follow closely the duct to the femoral head about 0.5cm with what special-purpose hand drill got out saw-tooth thread (right-hand member connecting thread) internal diameter that the aperture equals screw (3).To scrape the oblique countersunk head that matches with nut (1) circular cone recessed entering a nail mouthful place for the recessed scraper of the oblique countersunk head of reuse, makes when screwing nut (1), and it is vertical with direction of pull to advance nail mouthful place's stress surface, avoids producing component and causes section to be shifted.And then entering to follow closely the place, aperture, lead during as screw-in screw (3) and use with a bit of screw thread of special screw tap tapping.The reuse box spanner screws in screw (3) and enters to follow closely the duct, must make connecting thread (right-hand member saw-tooth thread) surpass section and reach in the femoral head.Be enclosed within on the nail tail with three wings open circuit device, on cortical bone, go out into grooving.Squeeze into three wings sleeve pipe (2) with the solid cover device of beating,, change the hollow cover device of beating, till three wings sleeve pipe (2) is all squeezed into afterwards to solid cover device and the screw (3) beaten when afterbody contacts.Revolve crow-bar with cross at last and control nut (1) and be screwed on the retaining thread of screw (3) afterbody, when nut (1) contact countersunk head is recessed, rotate a circle and a half to two weeks fixing finishing again.When the square toes of screw (3) damage can not use box spanner to revolve nail the time, use brute spring instead and clamp the square toes of screw (3) and come rotary screw (3).

This utility model can be packed three wings drive screw inner fixer in the neck of femur easily, after standby function recovers, removing holder also is easy to, only need to revolve crow-bar with cross earlier and oppositely screw out nut (1), chew pincers with point and extract three wings sleeve pipe (2), the reuse box spanner oppositely screws out screw (3) and gets final product.

Description of drawings:

Fig. 1, the front view of novel three wings drive screw inner fixer.

Fig. 2, the left view of Fig. 1.

Fig. 3, the A-A profile of Fig. 1.

Fig. 4, the tiltedly recessed scraper front view of countersunk head.

Fig. 5, the left view of Fig. 4.

Fig. 6, three swords open circuit device front view.

Fig. 7, three swords open circuit device top view.

Fig. 8, the left view of Fig. 6.

Fig. 9, the solid cover device sketch map of beating.

Figure 10, the hollow cover device sketch map of beating.

Figure 11, brute spring clamping structure figure,

The inner fixer of three wings drive screw shown in Fig. 1～3 comprises nut (1), three wings sleeve pipe (2) and screw (3).One end of nut (1) is a hemisphere face, has cross recess on its sphere, and the other end of nut (1) is a taper seat, and there is a screw at the center.Three wings sleeve pipe (2) is made of three wings and hollow bushing.Screw (3) is made of square toes, retaining thread, saw-tooth thread (right-hand member) and screw rod.

The oblique recessed scraper of countersunk head shown in Fig. 4,5 comprises the directed cylinder (4) and the cutter hub (5) of left end.Cylinder (4) is installed in the hole of cutter hub (5) left end, and the time spent can not unloaded cylinder (4).The scraper of cutter hub (5) left end is made multiple tooth inclined edge, and its inclination angle and nut (1) match, and is drilled with the hole of plug-in mounting handle on the right-hand member knife bar of cutter hub (5).

The open circuit of three swords shown in Fig. 6～8 device is made of hollow bushing (6), cutting edge (7), three wings (8), cylindrical handle (9) and handle hole (10).Three wings (8) become axial uniform distribution along the outer surface of hollow bushing (6), and the cutting edge of three wings (8) front end becomes stepped, and the side of three wings (8) has the axial side clearance angle.The width of three wings (8) and wing tip external diameter, the interior external diameter of hollow bushing (6) all with the corresponding site consistent size of three wings sleeve pipe (2), cylindrical handle (9) hole (10) that right-hand member bored is used for the plug-in mounting handle.

The solid cover device of beating shown in Figure 9 is made of two sections cylinders that vary in size, and end diameter is than the little 0～0.1mm of internal diameter of three wings sleeve pipe (2), and outside diameter is than the big 0～0.1mm in footpath, the end of three wings sleeve pipe (2).

The hollow cover device of beating shown in Figure 10 is the foraminous cylinder of an end, its external diameter is than the big 0～0.1mm in footpath, the end of three wings sleeve pipe (2), the retaining thread external diameter of its aperture ratio screw (3) left end is big, and the degree of depth in hole is greater than the square toes length sum of the thickness and the screw (3) of nut (1).

Brute spring folder shown in Figure 11 comprises collet (11), cover (13) in the alligator clamp overcoat (12), alligator clamp.Collet (11) is made up of two cones, and there is a square hole that adapts with the square toes of screw (3) at the center, axially has retraction slot.Alligator clamp overcoat (12) and interior cover (13) are with being threaded, and the right-hand member of overcoat (12) is milled with six square toes, and the right-hand member of interior cover (13) is milled with square head, and the left end of interior overcoat all has the taper hole that matches with collet (11).

A complete set of operating theater instruments is all made with stainless steel material.

Claims

1, a kind of medical surgical instrument of making by stainless steel material, the special-purpose operating theater instruments of using during in particular for the treatment fracture of femoral neck of three wings multiple screws device, it comprises that centre drill, special-purpose hand drill, hollow fluted drill, impact wrench, cross revolve crow-bar, handle, special screw tap etc., it is characterized in that this cover has the recessed scraper of oblique countersunk head, three swords open circuit device, solid cover device, hollow cover device and the brute spring folder beaten beaten in operating theater instruments.

2, operating theater instruments according to claim 1 is characterized in that, tiltedly the recessed scraper of countersunk head has directed cylinder (4), cutting edge and handle hole.

3, operating theater instruments according to claim 2 is characterized in that, tiltedly the cutting edge of the recessed scraper of countersunk head is a multiple-cutting-edge, and the tapering of the taper seat of cutting edge angle of inclination and nut (1) coincide.

4, operating theater instruments according to claim 1 is characterized in that, three swords open circuit utensil has hollow bushing (6), cutting edge (7), three wings (8), cylindrical handle (9) and handle hole (10).

5, operating theater instruments according to claim 4 is characterized in that, the three wings (8) of three swords open circuit device become axial uniform distribution along the outer surface of hollow bushing (6), and the cutting edge (7) of three wings (8) front end becomes stepped distribution.

6, operating theater instruments according to claim 4 is characterized in that, the width of the three wings (8) of three swords open circuits device, the interior external diameter of wing tip external diameter and hollow bushing (6) all with the corresponding site consistent size of three wings sleeve pipe (2).

7, operating theater instruments according to claim 1 is characterized in that, the solid cover device of beating is made up of two sections cylinders that vary in size.

8, operating theater instruments according to claim 7 is characterized in that, the solid little 0～0.1mm of internal diameter that beats cover device end diameter than three wings sleeve pipe (2), and outside diameter is than the big 0～0.1mm in footpath, the end of three wings sleeve pipe (2).

9, operating theater instruments according to claim 1 is characterized in that, the hollow cylindrical of making the cover device is a continuous cylinder face, and an end of cylinder is porose.

10, operating theater instruments according to claim 9, it is characterized in that, the hollow big 0～0.1mm in footpath, the end that beats the external diameter of cover device than three wings sleeve pipe (2), the retaining thread external diameter of aperture ratio screw (3) left end is big, and the degree of depth in hole is greater than the length sum of the thickness and the screw (3) of nut (1).

11, operating theater instruments according to claim 1 is characterized in that, the brute spring folder comprises collet (11), cover (13) in the alligator clamp overcoat (12), alligator clamp.

12, operating theater instruments according to claim 11 is characterized in that, collet (11) has the square hole that the square toes with screw (3) adapt.

13, operating theater instruments according to claim 11, it is characterized in that the overcoat (12) of brute spring folder and interior cover (13) are with being threaded, the right-hand member of interior cover (13) has square toes, the right-hand member of overcoat (12) has six square toes, and interior overcoat left end has the taper hole that matches with collet (11).