CN218106026U

CN218106026U - Hook-shaped intramedullary nail main nail extractor

Info

Publication number: CN218106026U
Application number: CN202221752059.2U
Authority: CN
Inventors: 丁英状; 孙鹏; 于美慧
Original assignee: WENDENG OSTEOPATH HOSPITAL
Current assignee: WENDENG OSTEOPATH HOSPITAL
Priority date: 2022-07-08
Filing date: 2022-07-08
Publication date: 2022-12-23
Anticipated expiration: 2032-07-08

Abstract

The utility model relates to the technical field of medical equipment, in particular to a hook-type intramedullary nail main nail extractor, which comprises a plate body, a round rod body and a hook body, wherein the plate body comprises a strip-shaped main body part, the rear end of the main body part extends downwards to form a holding part and extends upwards to form a knocking part, and the front end of the main body part gradually narrows; the rear end of the round rod body is fixed with the front end of the plate body into a whole; the hook body is in the shape of an olecranon, the rear end of the hook body is fixed with the front end of the round rod body into a whole, and the hook body is suitable for being inserted into any technical hole on the main nail of the intramedullary nail. Compared with the prior art, the utility model discloses reduce the operation degree of difficulty, reduce the operation time, this extractor is equipped with protection device, and the extractor splits and can't take out in the main nail pore when avoiding strikeing.

Description

Hook-shaped intramedullary nail main nail extractor

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a hook-shaped intramedullary nail main nail extractor.

Background

The intramedullary nail shown in fig. 1 is mainly used for fracture fixation of the femoral bone, the tibia bone, the humerus bone and other dry bones. The intramedullary nail main nail 100 is provided with a plurality of screw holes matched with the screws 200 and also comprises a plurality of fabrication holes 101 with different sizes and shapes. The current method for extracting the main intramedullary nail 100 is to unscrew the screw 200, screw the special intramedullary nail extractor with a sliding hammer into the screw hole of the removed screw 200, and then strike the nail with the sliding hammer, thereby extracting the main intramedullary nail 100.

However, the existing intramedullary nail main nail extractor has a plurality of defects: 1. the intramedullary nail is restricted by manufacturers, the screw ports of the intramedullary nails produced by the manufacturers are inconsistent, and a specific manufacturer instrument needs to be found when the intramedullary nail is taken out, otherwise, the intramedullary nail cannot be taken out; 2. the extractor is difficult to connect, the incision needs to be enlarged when the extractor is taken out due to the soft tissue around the main nail and the hyperplastic bone, the tissues around the screw port of the main nail can be carefully cleaned, the extractor can be connected with the main nail by adjusting the direction, and the risk that the screw port cannot be connected due to the fact that the screw port slides when repeated connection is unsuccessful exists; in addition, the main nail is often connected with long time, so that the operation time is increased, and the operation risks such as infection are increased; 3. the taking-out direction is fixed, the extractor is tightly connected with the main nail, the direction is fixed, and the direction is fixed by force when the knocking-back sliding hammer is used, so that force is not conveniently applied; 4. the main nail sinks, the extractor can not be connected, the main nail has the risk of sinking, the extractor can not be connected, and the main nail can not be taken out.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects or one of the defects of the prior art, the utility model discloses a hook-shaped intramedullary nail main nail extractor, which adopts the technical proposal that:

a hook-type intramedullary nail main nail extractor is different from the prior art and comprises

The plate body comprises a strip-shaped main body part, the rear end of the main body part extends downwards to form a holding part and extends upwards to form a knocking part, and the front end of the main body part is gradually narrowed;

the rear end of the round rod body is fixed with the front end of the plate body into a whole;

the hook body is in the shape of an olecranon, the rear end of the hook body is fixed with the front end of the round rod body into a whole, and the hook body is suitable for being inserted into any technical hole on the main nail of the intramedullary nail.

Further, the front end surface of the striking portion is located forward of the front end surface of the grip portion.

Furthermore, an annular cutting groove with an inverted triangular section is formed on the round rod body and close to the joint part of the round rod body and the plate body.

Further, the coupler body includes head and pole portion, and the diameter of head and pole portion equals and is greater than the diameter of the round bar body, and pole portion rear end tapers gradually and is unanimous and solid as an organic whole with the round bar body diameter, and the head is bent 180 degrees for pole portion front end and is formed by along bending axle rotary-cut, fillet.

Compared with the prior art, the utility model discloses reduce the operation degree of difficulty, reduce the operation time, this extractor is equipped with protection device, and the extractor fracture can't be taken out in the main nail pore when avoiding strikeing. Compared with the prior art, the utility model discloses following profitable technological effect has:

1. the intramedullary nail is not restricted by manufacturers and is suitable for most intramedullary nails in the market;

2. the operation of installing the hook-shaped extractor is simple, and the operation time is reduced;

3. the taking-out direction is flexible, and the force application direction can be adjusted;

4. the main nail does not need to be worried about sinking;

5. even if the extractor can not be taken out, the use of the extractor special for manufacturers is not influenced.

Drawings

Fig. 1 is a schematic structural view of a conventional intramedullary nail and a fractured dry bone fixed by the intramedullary nail.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a partially enlarged view of the left end of fig. 2.

Fig. 4 is a partially enlarged view of the middle portion of fig. 2.

Fig. 5 is a structural reference diagram of the hook body of the present invention before molding.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 2-4, the main nail extractor of the hook-type intramedullary nail comprises

The plate body 1 comprises a strip-shaped main body part 11, wherein the rear end of the main body part 11 extends downwards to form a holding part 12 and extends upwards to form a knocking part 13, and the front end of the main body part is gradually narrowed;

the rear end of the round rod body 2 is fixedly integrated with the front end of the plate body 1;

the hook body 3 is in an olecranon shape, the rear end of the hook body is fixed with the front end of the round rod body 2 into a whole, and the hook body is suitable for being inserted into any technical hole 101 on the intramedullary nail main nail 100.

The distal end surface of the striking portion 13 is located forward of the distal end surface of the grip portion 12. The handle is convenient to hold by the right hand, and the knocking part 13 is knocked by the left hand with heavy objects; an annular notch 21 with an inverted triangle cross section is arranged on the round rod body 2 and close to the joint part of the round rod body and the plate body 1. The annular notch 21 serves as the first break, and in case of failure, the hook body does not break in the human body, and is easy to take out.

The hook body 3 comprises a head part 31 and a rod part 32, the diameters of the head part 31 and the rod part 32 are equal and larger than the diameter of the round rod body 2, and the rear end of the rod part 32 is gradually narrowed to be consistent with the diameter of the round rod body 2 and is fixed into a whole. As shown in fig. 5, before the head 31 is formed, the front end of the rod 32 is bent 180 degrees to form a semicircular ring, the semicircular ring is cut along the bending axis in a rotary manner, and the semicircular ring is naturally formed into an eagle hook shape after the rotary cutting, and then is rounded. Thus, the front end of the hook body 3 is in a shape of a round, the human body composition cannot be damaged, and the hook body is thick, strong, high in strength and not easy to break.

When the intramedullary nail is used, firstly, the screw 200 on the intramedullary nail main nail 100 is screwed off, then the right hand holds the holding part 12, the hook body 3 extends into the intramedullary nail main nail position in a human body, the olecranon of the hook body 3 penetrates into the fabrication hole 101 at the end part of the intramedullary nail main nail 100, the intramedullary nail main nail 100 cannot be pulled out by firstly tentatively pulling and twisting, if the intramedullary nail main nail 100 is not threaded, the left hand is used for knocking the knocking part 13 by a heavy object such as a small hammer, small force is firstly used if the intramedullary nail main nail is still motionless, and strength is added, and after the intramedullary nail main nail 100 is separated from a part of the bone, the olecranon can penetrate into another fabrication hole close to the inner part of the intramedullary nail main nail 100, so that the operation is alternated, and the intramedullary nail main nail can be taken out under the common conditions. If the material cannot be taken out, the material is taken out by other means.

The present invention has not been described in detail in the prior art or by conventional means.

Claims

1. A hook-type intramedullary nail main nail extractor is characterized by comprising

The plate body (1) comprises a strip-shaped main body part (11), the rear end of the main body part (11) extends downwards to form a holding part (12) and extends upwards to form a knocking part (13), and the front end of the main body part is gradually narrowed;

the rear end of the round rod body (2) is fixedly integrated with the front end of the plate body (1);

the hook body (3) is in an olecranon shape, the rear end of the hook body is fixed with the front end of the round rod body (2) into a whole, and the hook body is suitable for being inserted into any technical hole (101) on the intramedullary nail main nail (100).

2. The hook-type intramedullary nail primary nail extractor according to claim 1, wherein the front end surface of the striking portion (13) is forward of the front end surface of the grip portion (12).

3. The hook-type intramedullary nail primary nail extractor according to claim 1, characterized in that the circular rod (2) is provided with an annular slot (21) with an inverted triangular cross-section near its junction with the plate (1).

4. The hook-type intramedullary nail main nail extractor according to claim 1, wherein the hook body (3) comprises a head part (31) and a rod part (32), the diameters of the head part (31) and the rod part (32) are equal and larger than the diameter of the round rod body (2), the rear end of the rod part (32) is gradually narrowed to be consistent with the diameter of the round rod body (2) and is fixed into a whole, and the head part (31) is formed by bending the front end of the rod part (32) for 180 degrees and performing rotary cutting and rounding along a bending shaft.