CN207168575U - A kind of microwave melt needle - Google Patents

Abstract

The utility model discloses a microwave ablation needle, which comprises a needle body, a microwave coaxial cable and a fixed handle. The needle body includes a needle point and a needle tube. The needle point and the needle tube are integrally formed. The needle point is fixedly connected to the microwave coaxial cable. , with a curved tip. When in use, the microwave coaxial cable is connected to the high-frequency connector to transmit the microwave to the needle tip. During the operation, the operator punctures the ablation needle into the patient's body so that the needle tip penetrates into the tumor. The needle tip is the microwave release area to eliminate the tumor. Due to the curved needle tip, compared with the straight needle tip, the curved needle tip has a larger and wider ablation area under the same diameter conditions, and the thinner needle tip can achieve the ablation effect of the thicker needle tip. While achieving better ablation of tumors, it can also reduce the physical trauma and economic losses caused by serious complications such as pneumothorax and hemothorax to patients.

Description

A microwave ablation needle

technical field

The utility model relates to the technical field of microwave ablation, in particular to a microwave ablation needle.

Background technique

Microwave ablation is a highly efficient, rapid, uniform heating, thorough thermal coagulation, easy to use and safe treatment method for tumor tissue. It has been widely used in clinic for many years. At present, most ablation needles have straight needle tips, which ablate a smaller area. Generally speaking, the thicker the needle, the better the effect of microwave ablation. Therefore, thicker needles are used to ablate larger tumors, but , Thicker needles are likely to cause more complications after treatment. When encountering larger tumors, thinner microwave ablation needles cannot meet the requirements for tumor elimination. Therefore, we designed a microwave ablation needle. The thin needle can achieve the microwave release effect of the thick needle and achieve the effect of large ablation area. At the same time, it can reduce complications, facilitate the completion of the operation, and reduce the physical trauma and economic loss of patients.

Utility model content

In view of this, the utility model provides a microwave ablation needle, which solves the technical problem of small microwave ablation needle tip ablation area in the prior art.

The technical means adopted in the utility model are as follows: a microwave ablation needle, including a needle body, a microwave coaxial cable, a fixed handle and a cooling system, the needle body includes a needle point and a needle tube, the needle point and the needle tube are integrally formed, and the needle point It is fixedly connected to the microwave coaxial cable, the needle point is a microwave release area, and the needle point is curved.

Preferably, the needle tip is in a spiral curved shape.

Preferably, the needle point is curved in a wave shape.

Preferably, the curvature of the needle tip is 0.1-0.8.

Preferably, the curvature gradually decreases toward the puncturing direction.

Preferably, the size of the helix gradually decreases toward the puncturing direction.

Preferably, there are more than two needle points.

Using the microwave ablation needle provided by the utility model, when in use, the microwave coaxial cable is connected with the high-frequency joint to transmit the microwave to the needle tip. In the tumor, the needle tip is the microwave release area, which has the effect of eliminating the tumor. Since the needle tip is curved, compared with the straight needle tip, the curved needle tip has a larger and wider ablation area under the same diameter conditions, reaching While better ablation of tumors, it can also reduce the physical trauma and economic losses caused by serious complications such as pneumothorax and hemothorax to patients.

Description of drawings

Fig. 1 is a schematic structural diagram of a microwave ablation needle provided by the present invention;

Fig. 2 is the structural representation of needle tip in embodiment 2;

Figure 3 is a schematic diagram of the calculation of curvature.

Detailed ways

The principles and features of the present utility model are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the utility model, and are not used to limit the scope of the utility model.

Example 1

As shown in Figure 1, a microwave ablation needle includes a needle body 1, a microwave coaxial cable 2, a fixed handle 3 and a cooling system. The cooling system can be used to reduce the temperature of the microwave ablation needle. The cooling system is a relatively mature existing Technology, here will not elaborate one by one. The needle body 1 includes a needle point 11 and a needle tube 12, the needle point 11 is fixedly connected to the microwave coaxial cable 2, and generally, the needle point 11 and the needle tube 12 are integrally formed. The needle point 11 is a microwave release area, and the needle point 11 is wavy and curved. The smaller the curvature, the better the smoothness of puncture, but the ablation area is slightly smaller, so the curvature is generally 0.1-0.8. In order to ensure the smoothness of puncture, the curvature should not be too large, preferably 0.4, which can ensure smoothness and The ablation area is relatively good. As shown in Figure 3, the calculation formula of the curvature is: C=H/L, C is the curvature, H is the height of the chord at the highest point of the curvature, and L is the length between the starting points of the curvature. For example, H is 0.4 mm, L is 1mm, then the curvature is 0.4. Generally speaking, the diameter of the needle tip 11 is between 0.5 mm and 2.5 mm. The larger the diameter of the needle tip, the better the effect of microwave ablation. Therefore, a needle with a larger diameter is used to ablate a larger tumor. After treatment, it is easy to cause more complications. When encountering a large tumor, the microwave ablation needle with a smaller diameter cannot meet the requirements for tumor elimination. However, because the utility model improves the needle point 11 into a curved shape, the lateral ablation area of the needle point 11 in contact with the tumor is actually increased, and the thinner needle point 11 can achieve the ablation effect of the thicker needle point 11, while reducing hemorrhage pneumothorax and other complications. disease. According to calculations, under the same length, the ablation effect of the curved needle tip 11 of the present invention with a diameter of 1 mm can reach the effect of a linear needle with a diameter of 1.8 mm. That is, it can be understood that under the same length and diameter, the ablation effect of the curved needle tip 11 is better than that of the straight needle, and the ablation effect of the curved needle tip 11 is about twice that of the straight needle when the curvature is 0.4. The effect of about 1.5 times can also be achieved when the degree is other values.

The degree of curvature decreases sequentially in the direction of puncture to better ensure the smoothness of puncture. When in use, the microwave coaxial cable 2 is connected to the high-frequency connector to transmit microwaves to the needle tip 11. During the operation, the operator punctures the ablation needle into the patient's body so that the needle tip 11 penetrates into the tumor. The needle tip 11 is the microwave release area. It has the effect of eliminating tumors. Since the needle tip 11 is curved, especially the wavy curved shape, compared with the straight needle tip 11, the curved needle tip 11 has a larger and wider ablation area under the same diameter conditions , to achieve better ablation of tumors, and at the same time reduce the physical trauma and economic losses caused by serious complications such as pneumothorax and hemothorax to patients.

Example 2

A microwave ablation needle, including a needle body 1, a microwave coaxial cable 2, a fixed handle 3 and a cooling system. The needle body 1 includes a needle point 11 and a needle tube 12. The needle point 11 is fixedly connected to the microwave coaxial cable 2. Generally, the needle point 11 and the needle tube 12 are integrally formed. The needle point 11 is a microwave release area, and as shown in FIG. 3 , the needle point 11 is in a spiral curved shape. The working principle is the same as that of Example 1. As shown in Figure 2, the needle point 11 is a spiral curved shape, and the lateral span of the needle point 11 increases. Generally speaking, the lateral span should not be too large. 5 times is enough to ensure the smoothness of the puncture. The contact area between the needle tip 11 and the tumor is increased, making the ablation area larger and wider. It also achieves better ablation of the tumor while reducing serious complications such as pneumothorax and hemothorax. The physical trauma and economic loss brought to the patient will decrease in size in the direction of the puncture in order to better ensure the smoothness of the puncture.

In addition, it should be pointed out that there is only one needle tip 11 in the first embodiment and the second embodiment. In fact, those skilled in the art can understand that, according to tumor shapes of different sizes, in order to achieve a better ablation effect, there can be multiple needlepoints 11, such as two, three, four, etc., which will not be listed here. .

In summary, using the microwave ablation needle provided by the utility model, when in use, the microwave coaxial cable 2 is connected to the high-frequency connector to transmit the microwave to the needle tip 11. During the operation, the operator punctures the ablation needle to the In the patient's body, the needle tip 11 is penetrated into the tumor, and the needle tip 11 is a microwave release area, which can eliminate the tumor. Generally speaking, the diameter of the needle tip 11 is between 0.5 mm and 2.5 mm, and the larger the diameter of the needle tip, the more effective microwave ablation is. The better, so a needle with a larger diameter is used to ablate a larger tumor. However, a needle with a larger diameter is likely to cause more complications after treatment. When encountering a larger tumor, a microwave with a smaller diameter Ablation needles cannot meet the requirements of eliminating tumors. However, because the utility model improves the needle point 11 into a curved shape, the lateral ablation area of the needle point 11 in contact with the tumor is actually increased, and the thinner needle point 11 can achieve the ablation effect of the thicker needle point 11, and at the same time, the thinner needle point 11 has a greater impact on the tumor. The tissue trauma is small, and the physical trauma and economic loss caused by serious complications such as bleeding and pneumothorax are reduced.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. within the spirit and principles of the present utility model shall include Within the protection scope of the utility model.

Claims (7)

1. A microwave ablation needle, comprising a needle body, a microwave coaxial cable, a fixed handle and a cooling system, characterized in that the needle body includes a needle point and a needle tube, and the needle point and the needle tube are integrally formed, and the needle point is fixedly connected to In the microwave coaxial cable, the needle point is a microwave release area, and the needle point is curved. 2 . The microwave ablation needle according to claim 1 , wherein the needle tip is in a spiral curved shape. 3 . 3 . The microwave ablation needle according to claim 1 , wherein the needle tip is curved in a wave shape. 4 . 4 . The microwave ablation needle according to claim 3 , wherein the curvature of the needle tip is 0.1-0.8. 5 . The microwave ablation needle according to claim 4 , wherein the curvature gradually decreases toward the puncture direction. 6 . 6 . The microwave ablation needle according to claim 2 , wherein the size of the helix gradually decreases toward the puncture direction. 7 . 7. A microwave ablation needle according to any one of claims 1-6, characterized in that there are more than two needle tips.