CN219439382U - Can prolong intramedullary nail tail shearing device - Google Patents

Abstract

The utility model discloses a device capable of extending the tail of an intramedullary nail, which comprises cutter heads and pressure rods, wherein a first connecting shaft is rotationally connected between the two cutter heads, a third connecting shaft is rotationally connected between the two pressure rods, a second connecting shaft is correspondingly rotationally connected between the two cutter heads and the two pressure rods respectively, an extension rod is connected to the far end of each pressure rod, a connecting hole extending along the length direction of the pressure rod is arranged at the far end of each pressure rod, an extension part is arranged near the pressure rod end of each extension rod, and the extension parts are inserted into the connecting holes. The beneficial effects of the utility model are as follows: the length of the pressure rod can be increased, so that the power arm is reinforced, the intramedullary nail can be sheared off under the condition of very labor saving, and the intramedullary nail with a thicker diameter can be easily sheared off; can be easily placed in small incisions or deep tissues to realize the shearing of intramedullary nails at different depth parts.

Description

Can prolong intramedullary nail tail shearing device

Technical Field

The utility model relates to the technical field of surgical instruments, in particular to a device capable of prolonging the tail of an intramedullary nail.

Background

The children have incomplete osteogenesis, also called as brittle bone disease, commonly called as porcelain doll, and are marked by slight collision to cause serious fracture. The treatment of the brittle bone disease is always confusing to the domestic pediatric orthopedics doctor, and the extendable intramedullary nail is a novel intramedullary nail specially designed for children with osteogenesis imperfecta, tibial prosthetic joint and other skeletal deformities. The intramedullary nail can be prolonged to fix the femur and tibia of children, the tail of the intramedullary nail is positioned in the deep soft tissue of the buttock when the femur is fixed, and the tail of the intramedullary nail is positioned in the knee joint when the tibia is fixed. Clinically, the device generally used for shearing intramedullary nails is mostly high-force scissors, the tool bit is mostly horizontal and vertical, the horizontal tool bit is difficult to carry out deep operation, and great force is needed when the intramedullary nails with thicker diameters are sheared, so that the difficulty in operation is increased in an intangible way; the vertical cutter head has limited force and can not cut the intramedullary nail with thicker diameter.

Disclosure of Invention

The utility model aims to provide a device for cutting out the tail of an intramedullary nail, which can be used for solving the problems in the background technology.

The technical scheme of the utility model is as follows: the utility model provides a can prolong intramedullary nail tail shearing mechanism, includes tool bit and pressure pole, two the centre rotation of tool bit is connected with a first connecting axle, two the centre rotation of pressure pole is connected with a third connecting axle, two the tool bit corresponds the rotation respectively with two pressure poles and is connected with a second connecting axle, every the pressure pole keep away from the tool bit end all is connected with an extension bar, every the pressure pole keep away from the tool bit end all be equipped with a connecting hole that extends along pressure pole length direction, every the extension bar be close to the pressure rod end all be equipped with the extension, the extension is inserted in the connecting hole.

Further preferably, the connecting hole is a threaded hole, and the extension part is provided with external threads matched with the connecting hole, so that the connection between the extension rod and the pressure rod is facilitated.

Further preferably, the extension part is in threaded connection with an adjusting nut, so that the position of the extension rod relative to the pressure rod is locked.

Further preferably, the cutter head is an arc-shaped cutter with the angle not larger than 45 degrees, and can be easily placed in a small incision or deep tissues to cut intramedullary nails at different depth positions.

Further preferably, the pressure rod is far away from the cutter head end and is provided with a spring plate of a tilted arc structure, the tilted end of the spring plate is abutted against the other pressure rod which is not connected with the spring plate, and the pressure rod after the shearing action is completed is ensured to return to the original position, so that the next shearing operation is facilitated.

Further preferably, the tilting end of the elastic sheet adopts a circular arc structure, so that the tilting end of the elastic sheet is prevented from being blocked with the pressure rod.

Further preferably, the extension rod is provided with a stop part far away from the pressure rod end, and the stop part is an arc-shaped bulge and is used for limiting the position of holding the extension rod by the hands of a doctor and ensuring the accurate holding position of the hands of the doctor.

Further preferably, a hanging hole penetrating through the extension rod is formed in the end, far away from the pressure rod, of the extension rod, so that the shearing device is hung, and the shearing device is convenient to store, kill and dry.

The utility model has the advantages that: the length of the pressure rod can be increased through the arrangement of the extension rod, so that the power arm is reinforced, the intramedullary nail can be sheared off under the condition of very labor saving, and the intramedullary nail with a thicker diameter can be easily sheared off; the extension part is inserted into the connecting hole, so that the connection between the extension rod and the pressure rod can be realized; the integral length of the extension rod and the pressure rod is adjusted through different depths of the extension part inserted into the connecting hole; the fixed position of the extension rod relative to the pressure rod is locked through the adjusting nut, so that the extension rod can be prevented from rotating randomly; the cutter head is arranged to be an arc-shaped cutter, so that the cutter head can be easily placed in small incisions or deep tissues, and the intramedullary nails at different depth positions can be sheared.

Drawings

The utility model is further described below with reference to the accompanying drawings and examples:

FIG. 1 is a front view of an expanded configuration of an extendable intramedullary nail tail cutting device in accordance with an embodiment of the present utility model;

FIG. 2 is an enlarged schematic view of the structure of FIG. 1A according to the present utility model;

FIG. 3 is a schematic view of a closed configuration of an extendable intramedullary nail tail cutting apparatus according to an embodiment of the present utility model;

fig. 4 is a schematic left-view structural diagram of a device for cutting out the tail of an extendable intramedullary nail according to an embodiment of the present utility model.

Wherein: the tool comprises a tool bit 1, a pressure rod 2, a connecting hole 21, an extension rod 3, an extension part 31, a regulating nut 32, a stop part 33, a hanging hole 34, a spring plate 4, a first connecting shaft 5, a second connecting shaft 6 and a third connecting shaft 7.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

Examples:

as shown in fig. 1-4, a device capable of cutting out the tail of an intramedullary nail and used for cutting out the tail of an intramedullary nail during operation comprises a cutter head 1 and a pressure rod 2, wherein a first connecting shaft 5 is rotationally connected between the two cutter heads 1, a third connecting shaft 7 is rotationally connected between the two pressure rods 2, a second connecting shaft 6 is correspondingly rotationally connected between the two cutter heads 1 and the two pressure rods 2 respectively, wherein the cutter head 1 is used for cutting out, the pressure rod 2 is used for holding force by a doctor, the two pressure rods 2 relatively rotate around the third connecting shaft 7 to drive the two cutter heads 1 to synchronously rotate by taking the first connecting shaft 5 and the second connecting shaft 6 as fulcrums, the cutter heads 1 are opened and closed, and the action of controlling the cutter heads 1 is realized to achieve the cutting-out effect. The end of each pressure rod 2 far away from the tool bit 1 is connected with an extension rod 3, the end of each pressure rod 2 far away from the tool bit 1 is provided with a connecting hole 21 extending along the length direction of the pressure rod 2, the end of each extension rod 3 close to the pressure rod 2 is provided with an extension part 31, and the extension part 31 is inserted into the connecting hole 21. Through the setting of extension rod 2, can increase the length of pressure rod 2 to reach the enhancement power arm (according to lever law principle), thereby can reach under the very laborsaving circumstances and prune the intramedullary nail, also can easily prune the thicker intramedullary nail of diameter. The extension rod 3 is inserted into the connecting hole 21 through the extension part 31, so that the connection between the extension rod 3 and the pressure rod 2 is realized, and the integral length of the extension rod 3 and the pressure rod 2 is adjusted through different depths of the extension part 31 inserted into the connecting hole 21.

In this application, connecting hole 21 is the screw hole, is equipped with the external screw thread of cooperation connecting hole 21 on the extension 31, makes things convenient for the connection of extension rod 3 and pressure bar 2, and the connected mode is simple. The adjusting nut 32 is screwed on the extension part 31, the screw thread directions of the adjusting nut 32 and the connecting hole 21 are consistent, the locking of the fixed position of the extension rod 3 relative to the pressure rod 2 is realized, and the extension rod 3 can be prevented from rotating randomly.

In this application, tool bit 1 is not more than 45 degrees arc sword, and this application adopts 45 degrees arc sword, and this arc sword can be light loose place in little incision or deep tissue, realizes the shearing of the intramedullary nail to different depth positions.

In this application, the pressure pole 2 keep away from tool bit 1 end and be equipped with the shell fragment 4 of the arc structure of perk, the perk end of shell fragment 4 with the another pressure pole 2 looks butt of not being connected with it, through the setting of shell fragment 4, guarantee to prune pressure pole 2 after the action can get back to the normal position, be convenient for prune the operation next time. The tilting end of the elastic sheet 4 adopts a circular arc structure, so that the tilting end of the elastic sheet 4 can conveniently slide on the rod surface of the pressure rod 2 contacted with the elastic sheet, and the tilting end of the elastic sheet 4 and the pressure rod 2 are prevented from being blocked, so that the pressure rod 2 is difficult to extrude.

In the application, the end, far away from the pressure rod 2, of the extension rod 3 is provided with the stop part 33, and the position of the extension rod 3 held by the hands of a doctor can be limited through the stop part 33, so that the accurate holding position of the hands of the doctor is ensured, and the force is convenient to use; the stop portion 33 is arc-shaped and protruding, so that the comfort level of hand holding is improved.

In this application, the extension rod 3 keep away from pressure pole 2 end is equipped with the hanging hole 34 that runs through extension rod 3, conveniently hangs this shearing mechanism, is convenient for store, kill and dry.

The above embodiments are merely for illustrating the technical concept and features of the present utility model, and are not intended to limit the scope of the present utility model to those skilled in the art to understand the present utility model and implement the same. All modifications made according to the spirit of the main technical proposal of the utility model should be covered in the protection scope of the utility model.

Claims (8)

1. The utility model provides a can prolong intramedullary nail tail shearing mechanism, includes tool bit (1) and pressure pole (2), two the centre rotation of tool bit (1) is connected with a first connecting axle (5), two the centre rotation of pressure pole (2) is connected with a third connecting axle (7), two tool bit (1) and two pressure poles (2) correspond respectively and rotate and be connected with a second connecting axle (6), its characterized in that: every keep away from tool bit (1) end of pressure pole (2) all is connected with extension rod (3), every keep away from tool bit (1) end of pressure pole (2) all is equipped with one and follows connecting hole (21) that pressure pole (2) length direction extends, every be close to pressure pole (2) end of extension rod (3) all is equipped with extension part (31), extension part (31) are inserted and are located in connecting hole (21).

2. An extendable intramedullary nail tail shearing apparatus as defined in claim 1, wherein: the connecting hole (21) is a threaded hole, and the extension part (31) is provided with external threads matched with the connecting hole (21).

3. An extendable intramedullary nail tail shearing apparatus as defined in claim 2, wherein: an adjusting nut (32) is connected to the extension part (31) in a threaded manner.

4. An extendable intramedullary nail tail shearing apparatus as defined in claim 1, wherein: the cutter head (1) is an arc-shaped cutter with the angle not larger than 45 degrees.

5. An extendable intramedullary nail tail shearing apparatus as defined in claim 1, wherein: the pressure rod (2) is provided with a spring piece (4) with a tilted arc structure at the end far away from the cutter head (1), and the tilted end of the spring piece (4) is abutted against the other pressure rod (2) which is not connected with the spring piece.

6. The extendable intramedullary nail tail shearing apparatus of claim 5, wherein: the tilting end of the elastic sheet (4) adopts a circular arc structure.

7. An extendable intramedullary nail tail shearing apparatus as defined in claim 1, wherein: the end, far away from the pressure rod (2), of the extension rod (3) is provided with a stop part (33), and the stop part (33) is an arc-shaped bulge.

8. An extendable intramedullary nail tail shearing apparatus as defined in claim 1, wherein: the end, far away from the pressure rod (2), of the extension rod (3) is provided with a hanging hole (34) penetrating through the extension rod (3).