Microwave ablation needle head structure with low puncture resistance

Abstract

The utility model discloses a microwave ablation needle head structure with low puncture resistance, which comprises a needle head (1), and is characterized in that the front end of the needle head (1) is provided with a main inclined surface (2) formed by integrally cutting off a part of a certain inclined angle, and the main inclined surface (2) is provided with a tip end; the two sides of the main inclined surface (2) are respectively provided with an auxiliary inclined surface (3) formed by integrally cutting off a part of a certain inclined surface, and the auxiliary inclined surfaces (3) and the main inclined surface (2) share a pointed end. By designing the reasonable and effective needle head structure, the purposes of reducing puncture resistance, reducing normal tissue trauma and weakening the pain of a patient are achieved, and the needle head structure has the advantages of being small in percutaneous resistance, small in tissue trauma, capable of reducing the pain of the patient and suitable for application and popularization.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, in particular to a microwave ablation needle head structure with low puncture resistance. Background Art

[0002] Microwave ablation has become one of the important means of clinical treatment of solid tumor tissue. Microwave ablation is to apply microwaves, a high-frequency electromagnetic wave, to human tumor tissue, and use microwave ablation needles to release microwave energy to tumor tissue. Polar molecules (mostly water) in tumor tissue rotate at high speed under the action of microwave field and quickly generate a large amount of heat. When the temperature rises to above 60°C, it causes tissue dehydration, coagulation, protein denaturation, and irreversible necrosis, thus achieving the purpose of treatment.

[0003] According to the treatment principle of microwave ablation, during the operation, the microwave ablation needle needs to be punctured and inserted into the human tissue for treatment. Therefore, the structure of the microwave ablation needle tip plays a decisive role in the surgical needle insertion resistance, tissue trauma, and patient pain.

[0004] Currently, the ablation needles on the market are mostly conical needles and triangular needles. These two shapes of needles have a relatively large puncture force when used, cause relatively large trauma to normal tissues, and cause relatively strong pain to patients. Utility Model Content

[0005] The utility model aims to solve the defects of the existing microwave ablation needle head, such as large puncture force, large trauma and strong pain for patients, and to provide a microwave ablation needle head structure with low puncture resistance.

[0006] The purpose of the utility model is solved by the following technical solutions:

[0007] A microwave ablation needle structure with low puncture resistance includes a needle, characterized in that: the front end of the needle has a main bevel formed by cutting off a part of the whole at a certain inclination angle, the main bevel has a tip, and on both sides of the main bevel there are secondary bevels formed by cutting off a part of the whole at a certain inclination angle, respectively, and the secondary bevel and the main bevel share a tip.

[0008] The two secondary inclined surfaces are symmetrically arranged on both sides of the main inclined surface.

[0009] The length of the secondary bevel along the axial direction of the needle is 30% to 48% of the length of the primary bevel along the axial direction of the needle.

[0010] The inclination angles of the two secondary slopes relative to the main slope are consistent or inconsistent.

[0011] The included angle between any auxiliary inclined plane and the main inclined plane is an acute angle.

[0012] The angle of the inclined plane ranges from 15° to 30°.

[0013] The inclination angle of the main inclined surface relative to the horizontal plane does not exceed 30°.

[0014] The inclination angle of the main inclined surface relative to the horizontal plane is 10° to 25°.

[0015] The tip angle of the main inclined surface is 20° to 45°.

[0016] The needle is made of metal material.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] The utility model aims to reduce puncture resistance, reduce normal tissue trauma, and alleviate patient pain by designing a reasonable and effective needle structure. The advantages of the needle structure are small percutaneous resistance, small tissue trauma, and reduced patient pain, and it is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Attached Figure 1 This is one of the three-dimensional diagrams of the needle structure of the microwave ablation needle with low puncture resistance of the utility model;

[0020] Attached Figure 2 This is the second stereoscopic diagram of the needle tip structure of the microwave ablation needle with low puncture resistance of the utility model;

[0021] Attached Figure 3 It is a front view of the needle structure of the microwave ablation needle with low puncture resistance of the utility model;

[0022] Attached Figure 4 It is a top view of the needle structure of the microwave ablation needle with low puncture resistance of the utility model;

[0023] Attached Figure 5 It is a bottom view of the needle structure of the microwave ablation needle with low puncture resistance of the utility model;

[0024] Attached Figure 6 It is a left view of the needle structure of the microwave ablation needle with low puncture resistance of the utility model;

[0025] Attached Figure 7 It is a schematic diagram of the main bevel angle of the microwave ablation needle structure with low puncture resistance of the utility model;

[0026] Attached Figure 8 It is a schematic diagram of the main bevel tip angle of the microwave ablation needle structure with low puncture resistance of the utility model.

[0027] Among them: 1-needle head; 2-main bevel; 3-secondary bevel. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0029] like Figure 1-8 As shown: a microwave ablation needle structure with low puncture resistance, including a needle 1 made of metal material, the front end of the needle 1 has a main bevel 2 formed by cutting off a part of the whole at a certain inclination angle, and the main bevel 2 has a tip; on both sides of the main bevel 2, there are secondary bevels 3 formed by cutting off a part of the whole at a certain inclination angle, and the secondary bevel 3 and the main bevel 2 share a tip. In actual production, according to actual conditions, the main bevel 2 can be cut out first, and then the two secondary bevels 3 can be cut out, or the two secondary bevels 3 can be cut out first, and then the main bevel 2 can be cut out.

[0030] In the above needle structure, as needed, the two secondary bevels 3 are symmetrically arranged on both sides of the main bevel 2, or are arranged on both sides of the main bevel 2 in an asymmetrical structure, that is, the inclination angles of the two secondary bevels 3 relative to the main bevel 2 are consistent or inconsistent; because it is necessary to reduce the puncture force while maintaining the overall strength of the needle 1, it is necessary to control the inclination angle of the secondary bevel 3 relative to the main bevel 2 and the size of the secondary bevel 3, so the length of the secondary bevel 3 along the axial direction of the needle 1 is 30% to 48% of the length of the main bevel 2 along the axial direction of the needle 1.

[0031] It should be noted that the included angle between any auxiliary bevel 3 and the main bevel 2 is an acute angle, which can greatly reduce the puncture resistance and reduce the puncture force during use; the preferred range of the above-mentioned bevel angle is 15° to 30°.

[0032] Similarly, in order to reduce the puncture resistance, the inclination angle of the main slope 2 relative to the horizontal plane does not exceed 30°, and a preferred range is 10° to 25°; in addition, in order to reduce the puncture resistance, the tip angle of the main slope 2 is further limited to 20° to 45°, and a preferred range is 25° to 35°.

[0033] The microwave ablation needle needle structure provided by the utility model is made of metal material, and has a shape of a large inclined surface plus two inclined surfaces on both sides. It is improved on the existing mature injection puncture needle structure. Through the design of one main and two auxiliary inclined surfaces, it can reduce puncture resistance, reduce normal tissue trauma, and reduce the patient's pain. The advantages of this needle structure are small percutaneous resistance, small tissue trauma, and can reduce the patient's pain, and it is suitable for popularization and use.

[0034] The above embodiments are only for illustrating the technical idea of ​​the utility model, and cannot be used to limit the protection scope of the utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the utility model shall fall within the protection scope of the utility model; any technology not involved in the utility model can be realized by existing technology.

Claims

1. A microwave ablation needle structure with low puncture resistance, comprising a needle (1), characterized in that: The front end of the needle (1) has a main bevel (2) formed by cutting off a portion of the whole at a certain inclination angle, the main bevel (2) has a tip, and on both sides of the main bevel (2) there are secondary bevels (3) formed by cutting off a portion of the whole at a certain inclination angle, the secondary bevels (3) and the main bevel (2) share a tip.

2. The microwave ablation needle tip structure with low puncture resistance according to claim 1, characterized in that: The two secondary inclined surfaces (3) are symmetrically arranged on both sides of the main inclined surface (2).

3. The microwave ablation needle tip structure with low puncture resistance according to claim 1, characterized in that: The length of the secondary bevel (3) along the axial direction of the needle (1) is 30% to 48% of the length of the primary bevel (2) along the axial direction of the needle (1).

4. The microwave ablation needle tip structure with low puncture resistance according to claim 1, characterized in that: The inclination angles of the two secondary inclined surfaces (3) relative to the main inclined surface (2) are consistent or inconsistent.

5. The microwave ablation needle tip structure with low puncture resistance according to any one of claims 1 to 4, characterized in that: The included angle between any auxiliary inclined surface (3) and the main inclined surface (2) is an acute angle.

6. The microwave ablation needle tip structure with low puncture resistance according to claim 5, characterized in that: The angle of the inclined plane ranges from 15° to 30°.

7. The microwave ablation needle tip structure with low puncture resistance according to claim 1, characterized in that: The inclination angle of the main inclined surface (2) relative to the horizontal plane does not exceed 30°.

8. The microwave ablation needle tip structure with low puncture resistance according to claim 7, characterized in that: The main inclined surface (2) has an inclination angle of 10° to 25° relative to the horizontal plane.

9. The microwave ablation needle tip structure with low puncture resistance according to any one of claims 1 to 4, characterized in that: The tip angle of the main inclined surface (2) is 20° to 45°.

10. The microwave ablation needle tip structure with low puncture resistance according to claim 1, characterized in that: The needle (1) is made of metal material.

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