CN2448313Y - Femoral self-locking intramedullary fixing nail - Google Patents

Abstract

The utility model discloses a femoral self-locking intramedullary fixing nail belonging to a medical appliance for a department of orthopedics. A plurality of long holes are arranged at the top of a rod of the fixing nail along the rod. A rod wall is drilled from the holes to the lower part of the rod along slanting different directions. An inserting needle, wherein, the top of which is provided with a blocking screen is inserted in the hole. The tail part, wherein, the tail end of which is opened along a sloping direction extends out of the rod wall. A covered nut is screwed on a stud at the top of the rod. When the utility model is used, a hole is drilled at the top of a femur for an operation, the hole is communicated with a bone cavity, the rod of the fixing nail penetrates through the hole, the inserting needle in inserted in the long hole, the tail part is opened for playing the anti-rotation action, the covered nut prevents the inserting needle from moving for playing the anti-shortening action, the intramedullary fixation of the nail is good, auxiliary tools for X-ray fluoroscopy and positioning drilling, etc. are not required, and the usage and the operation are convenient.

Description

Femur self-locking marrow internal fixation nail

This utility model belongs to medical apparatus, in particular for making the nail of marrow internal fixation after the Fracture of femur.

At present, fracture up and down in treatment femoral shaft isthmus plane, particularly comminuted fracture is generally with after wearing metallic rod in the marrow, be horizontally through metallic rod with pinning at the upper and lower side of femur and fix, better to generality fracture effect, but because under the femur during 1/3 place fracture, pinning is worn in punching need use x-ray fluoroscopy, sight far-end location, and the far-end of sight causes the distal locking nail difficulty because positional accuracy is low from datum mark is far away, with x-ray fluoroscopy human body is also had infringement simultaneously.

The purpose of this utility model provides a kind of x-ray fluoroscopy that do not need and punches, and can make the fixed staple of Fracture of femur well.

For achieving the above object, the technical solution of the utility model is: can insert from the punching of femur bone cavity upper end one, and with the top of the corresponding staple bar of its length, there is one section to be with externally threaded double-screw bolt, its top, have a plurality of slotted holes along staple bar length direction, the bar wall is bored at the oblique different directions in staple bar bottom respectively in the hole, the contact pin of top band retaining platform inserts along the hole, it is terminal along oblique extension bar wall, the nut that binds is screwed on the double-screw bolt on the staple bar, with the retaining platform cover on the contact pin within it.

During use, operation earlier exposes the femur top, vertical punching communicates with bone cavity, along hole insertion bone cavity its double-screw bolt is exposed at outside the hole on the staple bar of marrow internal fixation nail, with plug pin again in the hole on the insertion rod, make the suitable hole deviation of its afterbody in being flared to the lower end spongy bone, the nut of on the double-screw bolt on staple bar top, screwing on and binding, the retaining platform that blocks contact pin pushes up.

In order further to guarantee the staple bar at the bone cavity internal fixation, the outer border of the body of rod that penetrates the spongy bone place at an upper portion thereof is provided with anti-turntable.

This staple is owing to can insert the femur bone cavity, and contact pin is inserted into spongy bone place, bottom along its bar and opens, and has played its anti-rotation effect, when bar top band is prevented turntable, can prevent the rotation of staple together; The staple top has nut to block the cunning of scurrying of contact pin, has the anti-cripetura function of the injury of the bone, therefore need not x-ray fluoroscopy, positional punch, can realize that self-locking is fixed in the marrow.The combination of staple bar and contact pin has simultaneously increased the entire compression bending strength, has avoided stress concentration, and is simple, convenient during use, effective, recovers the back nail pulling and only makes otch of femoral head, brings painful little to patient.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the front view of femur self-locking marrow internal fixation nail;

Fig. 2 is the front view of contact pin among Fig. 1;

Fig. 3 is the A-A cutaway view of Fig. 1;

Fig. 4 is the B-B cutaway view of Fig. 1;

Fig. 5 is the C-C cutaway view of Fig. 1;

Fig. 6 is the D-D cutaway view of Fig. 1.

Among Fig. 1, one can from the punching of the bone cavity of femur 1 upper end insert and with the top of the corresponding staple bar 3 of its length, there is one section to be with externally threaded double-screw bolt 6, its top has more than two along staple bar 3 length directions, be preferably three holes of threading a needle triangular in shape (referring to Fig. 3,4,5,6), during hole to the bottom of bar, get out the bar wall to different directions separately sideling; The contact pin 2 (referring to Fig. 2) of top band retaining platform 2.1 inserts the hole of threading a needle respectively, open shape in its terminal suitable its oblique extension bar wall, the nut 7 that binds is screwed on the double-screw bolt 6 of staple masthead portion,, thereby plays the shortening of the injury of the bone when preventing that contact pin 2 from scurrying out with the retaining platform on the contact pin 2 2.1 cover within it.Resistance is little when the staple bar is worn in the femur bone cavity, leaves thinner guide rod 3.1 in the lower end of bar; In order to make bar fixing better,, can make band flank 5 (referring to Fig. 5) or, play anti-rotation fixation jointly with contact pin 2 open afterbodys with the anti-turntable 4 of shapes such as many ribs, projection at the spongy bone place that femur top staple bar passes at intracavity.

In addition, double-screw bolt 6 also has after femur connects, and extractor is screwed on it, makes things convenient for the nail nipping effect of staple bar 3.

Claims (2)

1, a kind of femur self-locking marrow internal fixation nail, comprise the staple bar (3) that can penetrate the femur bone cavity, it is characterized in that: the top of staple bar (3), have a plurality of slotted holes along its length direction, the oblique different directions in hole to the bottom of bar bores the bar wall, the contact pin (2) of top band retaining platform (2.1) inserts along the hole, and it is terminal along the oblique extension bar wall that opens, and the nut that binds (7) is screwed on the double-screw bolt (6) at staple bar (3) top.

2, staple as claimed in claim 1 is characterized in that: nail on the body of rod of portion's double-screw bolt (6) bottom the turntable of setting up defences (4) at this.

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