CN211243653U - Self-tapping kirschner wire - Google Patents

Abstract

The application provides a self-tapping Kirschner wire, which comprises a needle rod and a needle point; two pairs of self-tapping blades symmetrically arranged from the needle point to the direction derived from the needle bar, wherein the two pairs of self-tapping blades are taken as the symmetric center, and 4 inclined planes are arranged at the end part of the needle point; the inclined planes are symmetrically distributed pairwise, and the areas of the two symmetrically distributed inclined planes are equal; the grooves between each pair of self-tapping blades form chip grooves for removing bone chips. The utility model provides a self tapping ke shi needle is especially to some comparatively hard bones, and the tip part is owing to set up the self tapping cutting edge certainly, and the self tapping ke shi needle that provides from making this application in time does not increase the dynamics and also can make into more easily to the operation degree of difficulty and patient's misery have been reduced.

Description

Self-tapping kirschner wire

Technical Field

The utility model relates to the technical field of medical instrument, especially, relate to a self tapping ke shi needle.

Background

The kirschner wire is a commonly used internal fixation material for orthopedics, the original specification of the kirschner wire is generally fixed at about twenty centimeters, and the diameters of the kirschner wire are different from 0.5 to 2 millimeters. The bone fracture fixation device is used for fixing short fractures or avulsion fractures and other fractures with low stress, and is also commonly used for fixing temporary fracture blocks in orthopedic operations. With the wide application of external fixing brackets in recent years, the maximum diameter of the kirschner wire is gradually increased to 4 mm, and the external fixing lock pins are matched to fix emergent and large fractures such as pelvic fracture, calcaneal fracture and the like. The operation is more extensive, but for some harder bones, the tip part is difficult to drive in, and the force is not an effective solution, so the operation difficulty and the pain of a patient are increased, and the following improvement is made.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve the defect that above-mentioned prior art exists, provide a during operation, beat into self tapping ke shi needle of hard bone easily.

A self-tapping Kirschner wire comprises a needle rod and a needle point; two pairs of self-tapping blades symmetrically arranged from the needle point to the direction derived from the needle bar, wherein the two pairs of self-tapping blades are taken as the symmetric center, and 4 inclined planes are arranged at the end part of the needle point;

the inclined planes are symmetrically distributed pairwise, and the areas of the two symmetrically distributed inclined planes are equal;

the grooves between each pair of self-tapping blades form chip grooves for removing bone chips.

Further, in the self-tapping k-wire as described above, the deepest part of the chip groove is 1/3 of the diameter of the k-wire.

Further, in the self-tapping kirschner wire as described above, the vertical height of the inclined surface from the needle tip is 0.3 cm.

Further, in the self-tapping kirschner wire, the vertical height of the chip groove with the needle point as the starting point is 0.6 cm.

Further, in the self-tapping kirschner wire as described above, the inclination of the inclined surface is 30 ° to 60 °.

Further, the self-tapping kirschner wire as described above, the total length of the kirschner wire is 20-40 cm.

Further, the self-tapping k-wire as described above, the k-wire has a diameter of 1.5mm, 1.8mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm or 5.0 mm.

The utility model provides a self tapping ke shi needle has following advantage:

1. because the needle point sets up self tapping cutting edge, because it is the cutting knife face, can make the more sharp two skin that can attack osteoclast of ke shi needle can shorten greatly consuming time.

2. The chip discharge groove can discharge cut broken bone chips, heat generated after the broken bone chips are ground by the Kirschner wire is reduced, and needle channel infection after the broken bone chips are burnt and activated and infected is avoided.

3. The reduction of frictional heat can protect cells in the medullary cavity from being burnt and enable the cells to survive; therefore, the heat energy generated by the Kirschner wire when the Kirschner wire breaks the cortex of the bone can be obviously reduced, and the bone injury, the bone fracture and the fusion bone around the Kirschner wire are reduced to the minimum.

4. The burn to skin after heat energy reduces can reduce simultaneously, can reduce needle way mouth infection by a wide margin to the later stage, and later stage needle way nursing can effectively simplify.

5. Debris residue in the medullary cavity is reduced, and the infection risk is reduced;

drawings

FIG. 1 is a perspective view of the Kirschner wire of the present invention;

fig. 2 is a top view of the kirschner wire of the present invention;

reference numerals:

1-a kirschner wire needle bar; 101-bevel upper edge; 102-a bevel; 103-a needle tip; 104-chip groove; 105-self-tapping top edge; 106-self-tapping edge.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention are clearly and completely described below, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

FIG. 1 is a perspective view of the self-tapping Kirschner wire of the present invention; fig. 2 is a top view of the kirschner wire of the present invention; as shown in fig. 1 and fig. 2, the self-tapping kirschner wire provided by the utility model comprises a needle bar 1 and a needle tip 103; two pairs of self-tapping blades 106 symmetrically arranged in the direction extending from the needle tip 103 to the needle bar 1, and 4 inclined surfaces 102 are arranged at the end of the needle tip 103 with the two pairs of self-tapping blades 106 as the center of symmetry;

the inclined planes 102 are symmetrically distributed in pairs, and the areas of the two symmetrically distributed inclined planes 102 are equal;

the grooves between each pair of self-tapping edges 106 constitute chip flutes 104, which chip flutes 104 serve to remove bone chips.

The utility model provides a self tapping ke shi needle is especially to some comparatively hard bones, and the tip part is owing to set up the self tapping cutting edge certainly, and the self tapping ke shi needle that provides from making this application in time does not increase the dynamics and also can make into more easily to the operation degree of difficulty and patient's misery have been reduced.

Preferably, to ensure the most effective cooperation between the chip removal effect and the cutting effect of the k-wire, the deepest part of the chip removal groove 104 is 1/3 of the diameter of the k-wire.

Preferably, in order to ensure good cutting and chip removal, the vertical height of the bevel 102 starting from the needle tip 103 is 0.3 cm. I.e., the vertical distance from the bevel upper edge 101 to the self-tapping top edge 105 is 0.3 cm.

Preferably, in order to further ensure good cutting effect and chip removal effect, the vertical height of the chip removal groove 104 from the needle tip 103 is 0.6 cm. I.e. the vertical distance from the needle tip 103 to the self-tapping top edge 105 is 0.6 cm.

Preferably, the inclination from the inclined surface 102 is 30 ° to 60 ° in order to further ensure good cutting and chip evacuation.

According to the self-tapping Kirschner wire provided by the application, the total length of the Kirschner wire is 20-40 cm. The diameter is 1.5mm, 1.8mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm or 5.0 mm.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (7)

1. A self-tapping Kirschner wire comprises a needle rod (1) and a needle point (103); the needle is characterized in that two pairs of self-tapping blades (106) are symmetrically arranged from the needle point (103) to the direction derived from the needle rod (1), the two pairs of self-tapping blades (106) are taken as the symmetric center, and 4 inclined planes (102) are arranged at the end part of the needle point (103);

the inclined planes (102) are symmetrically distributed pairwise, and the areas of the two symmetrically distributed inclined planes (102) are equal;

the grooves between each pair of self-tapping edges (106) form flutes (104), said flutes (104) being used for removing bone debris.

2. The self-tapping k-wire of claim 1, wherein the deepest part of the chip flute (104) is 1/3 of the k-wire diameter.

3. Self-tapping k-wire according to claim 1, characterised in that the vertical height of the bevel (102) starting from the tip (103) is 0.3 cm.

4. Self-tapping k-wire according to claim 1, characterised in that the vertical height of the chip flutes (104) starting from the tip (103) is 0.6 cm.

5. Self-tapping k-wire according to claim 1, characterised in that the inclination of the bevel (102) is 30 ° -60 °.

6. The self-tapping k-wire of claim 1 wherein the overall length of the k-wire is 20-40 cm.

7. The self-tapping k-wire of claim 1, wherein the k-wire has a diameter of 1.5mm, 1.8mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm or 5.0 mm.

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