CN221205640U - A tungsten needle for minimally invasive surgery - Google Patents

Abstract

The utility model discloses a minimally invasive surgical tungsten needle, which relates to the technical field of surgical instruments, and comprises a detachably connected needle handle and a needle rod, wherein the end of the needle rod away from the needle handle is a needle tip, and at least the outer peripheral surface of the needle tip is provided with a reinforced wear-resistant layer. The minimally invasive surgical tungsten needle provided by the utility model can improve the hardness and wear resistance of the needle tip, thereby improving the service life of the entire tungsten needle.

Description

A tungsten needle for minimally invasive surgery

Technical Field

The utility model relates to the technical field of surgical instruments, in particular to a tungsten needle for minimally invasive surgery.

Background technique

Various tools are needed in the process of minimally invasive surgery. Minimally invasive tungsten needles are one of the commonly used tools. They are electrosurgical instruments used to replace traditional mechanical scalpels for tissue cutting and coagulation. For example, the anti-fall-off high-frequency tungsten needle electrosurgical knife provided by patent CN205913396U has a tungsten needle rod and a tungsten needle head. However, during the long-term service of the tungsten needle, especially the needle tip, it may be worn due to improper storage and other reasons, affecting its service life.

Utility Model Content

The purpose of the utility model is to provide a tungsten needle for minimally invasive surgery to solve the problems existing in the above-mentioned prior art, and to improve the hardness and wear resistance of the needle tip, thereby increasing the service life of the entire tungsten needle.

To achieve the above purpose, the utility model provides the following solutions:

The utility model provides a minimally invasive surgical tungsten needle, comprising a detachably connected needle handle and a needle rod, wherein one end of the needle rod away from the needle handle is a needle tip, and at least the outer peripheral surface of the needle tip is provided with a reinforcing wear-resistant layer.

Preferably, the reinforced wear-resistant layer is a TiTaCrMoNb high entropy alloy nitride coating.

Preferably, one end of the needle rod facing away from the needle tip extends into the needle handle and is threadedly connected to the needle handle.

Preferably, the outer circumferential surface of the needle rod is provided with the reinforced wear-resistant layer.

Compared with the prior art, the utility model has achieved the following technical effects:

The minimally invasive surgical tungsten needle provided by the utility model has a detachable connection between the needle handle and the needle rod, which is convenient for installation and disassembly, and a reinforced wear-resistant layer is arranged on the outer peripheral surface of the needle tip, which can protect the needle tip and improve the wear resistance of the needle tip, thereby improving the service life of the entire surgical tungsten needle.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 is a cross-sectional schematic diagram of a minimally invasive surgery tungsten needle provided in Example 1.

Icon: 1-minimally invasive surgery tungsten needle; 11-needle handle; 12-needle rod; 13-needle tip; 14-reinforced wear-resistant layer.

Detailed ways

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

The purpose of the utility model is to provide a tungsten needle for minimally invasive surgery to solve the problems existing in the above-mentioned prior art, and to improve the hardness and wear resistance of the needle tip, thereby increasing the service life of the entire tungsten needle.

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

Embodiment 1

The present embodiment provides a minimally invasive surgical tungsten needle 1, as shown in FIG1 , comprising a detachably connected needle handle 11 and a needle rod 12, the end of the needle rod 12 away from the needle handle 11 being a needle tip 13, and at least the outer peripheral surface of the needle tip 13 is provided with a reinforcing wear-resistant layer 14.

The needle handle 11 and the needle rod 12 can be detachably connected, which is convenient for installation and disassembly, and a reinforced wear-resistant layer 14 is provided on the outer peripheral surface of the needle tip 13 to protect the needle tip 13, so as to improve the strength and wear resistance of the needle tip 13, thereby improving the service life of the entire surgical tungsten needle.

Furthermore, the wear-resistant layer 14 can be set as a TiTaCrMoNb high entropy alloy nitride coating. The preparation method thereof can be referred to in patent CN114941122A-A high-hardness TiTaCrMoNbNx high entropy alloy film for medical devices and its preparation method. By controlling the proportion of N element in the TiTaCrMoNbNx high entropy alloy nitride coating, the hardness and elastic modulus performance can be adjusted. It can be seen from FIG7 in patent CN114941122A that Ti When the flow rate ratio of argon and nitrogen is 25:0, that is, when no nitrogen is introduced, the TaCrMoNbNx high entropy alloy nitride coating is TiTaCrMoNb high entropy alloy nitride coating, and the hardness and elastic modulus are the lowest at 19.6 GPa and 265.7 GPa respectively. Usually, the hardness of tungsten is 3.4-4.2 GPa, and the elastic modulus is 45-60 GPa. It can be seen that the hardness and elastic modulus of the coating are significantly better than those of tungsten; specifically, the thickness of the reinforced wear-resistant layer 14 is at the micron level.

In the optional scheme provided in this embodiment, it is more preferred that the end of the needle rod 12 away from the needle tip 13 extends into the needle handle 11 and is threadedly connected to the needle handle 11. The threaded connection facilitates the assembly and disassembly of the minimally invasive surgery tungsten needle 1 and facilitates the preparation of the reinforced wear-resistant layer 14 for the needle rod 12 alone.

In the optional scheme provided in this embodiment, it is more preferred that the exposed outer peripheral surface of the needle rod 12 is provided with a reinforced wear-resistant layer 14, that is, the needle rod 12 except the part connected to the needle handle 11 is provided with a reinforced wear-resistant layer 14, so as to improve the strength and wear resistance of the entire needle rod 12.

The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of the present invention. At the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims (4)

1. A tungsten needle for minimally invasive surgery, characterized in that it comprises a detachably connected needle handle (11) and a needle rod (12), wherein the end of the needle rod (12) away from the needle handle (11) is a needle tip (13), and at least the outer peripheral surface of the needle tip (13) is provided with a reinforced wear-resistant layer (14). 2. The minimally invasive surgical tungsten needle according to claim 1, characterized in that the reinforced wear-resistant layer (14) is a TiTaCrMoNb high entropy alloy nitride coating. 3. The minimally invasive surgical tungsten needle according to claim 1 is characterized in that one end of the needle rod (12) away from the needle tip (13) extends into the needle handle (11) and is threadedly connected to the needle handle (11). 4. The minimally invasive surgical tungsten needle according to claim 1, characterized in that the exposed outer peripheral surface of the needle rod (12) is provided with the reinforced wear-resistant layer (14).