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Microwave ablation electrode used under a bronchoscope

A technology of microwave ablation and bronchoscopy, which is applied in the direction of microwave surgical instruments, trocars, surgical instrument parts, etc., can solve the problems of inability to meet high-power rapid ablation treatment and limited cooling capacity, and achieve compact structure and easy production , to suppress the effect of retroreflection

Pending Publication Date: 2019-04-12
NANJING VISON CHINA MEDICAL DEVICES R & D CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it uses the method of spraying water outward to cool the needle and the ablation tissue, and its cooling capacity is limited, which cannot meet the needs of high-power rapid ablation therapy.

Method used

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  • Microwave ablation electrode used under a bronchoscope
  • Microwave ablation electrode used under a bronchoscope
  • Microwave ablation electrode used under a bronchoscope

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] like figure 1 As shown, the microwave ablation electrode used under the bronchoscope in this embodiment includes: a metal puncture head 4 , a needle rod 1 , a coaxial cable 2 and a choke ring 7 arranged outside the outer conductor of the coaxial cable 2 . The tail of the metal piercing head 4 has a boss 3, and the needle bar 1 is fixedly connected with the boss 3. The tail of the metal piercing head 4 has a boss 3 connected to the inner conductor of the coaxial cable 2 , and an antenna emission window 5 is formed between the boss 3 and the outer conductor of the coaxial cable 2 . In this embodiment, the needle bar is a flexible needle bar (processed from soft plastic material, or using silicone material), and the flexible needle bar has a double-layer structure with a hollow interlayer inside, that is, an inner bar 1-2 and an outer bar 1-2. 1. The water inlet channel is formed between the inner wall of the flexible needle bar 1 and the outer wall of the coaxial cable ...

Embodiment 2

[0018] like figure 2 As shown, the main structure of the microwave ablation electrode in this embodiment is the same as that in the first embodiment, the difference is that the metal puncture head 4 is fitted with a dielectric sleeve 8 on the tail boss 3, and the needle rod 1 is fixed to the dielectric sleeve 8. The needle bar and the medium sleeve can be fixed in the form of a set.

Embodiment 3

[0020] like image 3 As shown, the main structure of the microwave ablation electrode in this embodiment is basically the same as that in Embodiment 2, the difference is that the choke ring 7 is fixed between the outer conductor of the coaxial cable 2 and the inner wall of the inner rod 1-2, specifically, the choke ring 7 The inner ring of the choke ring is welded and fixed with the outer conductor of the coaxial cable 2, and the outer edge of the choke ring 7 is welded or bonded with the inner wall of the inner rod 1-2. The choke ring is evenly provided with a number of spiral through holes for cooling water to pass through and guide it. The inner wall of the needle bar at the front end of the choke ring is provided with a spiral groove, and the rotation direction of the spiral groove is consistent with the rotation direction of the spiral through hole. The spiral through hole and the spiral groove cooperate to guide the flowing cooling water to advance in a spiral manner, wh...

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Abstract

The invention relates to a microwave ablation electrode used under a bronchoscope. The microwave ablation electrode comprises: a metal puncture head, a needle bar and a coaxial cable, the needle bar is a flexible needle bar, the flexible needle bar is provided with a double-layer structure with a hollow interlayer, and a water inlet channel is formed between the inner wall of the flexible needle bar and the outer wall of the coaxial cable, the hollow interlayer forms a water return channel, the inner wall of the front end of the flexible needle bar is opened or slotted, so that the water inletchannel and the water return channel communicate with each other here, and the inner wall or the outer wall of the needle bar behind an antenna emission window is plated with metal or provided with ametal mesh. The microwave ablation electrode of the invention has good softness, and microwave ablation treatment can be implemented through a catheter of a bronchoscope. An inner water pipe structure of a traditional water-cooling ablation needle is omitted, instead, the double-layer flexible needle bar realizes water cooling, and the structure is more compact and convenient for production. An electrode head is provided with the puncture head which can directly penetrate the tumor, and a choking ring is directly fixed on a coaxial cable outer conductor and can effectively suppress the backward reflection of microwaves, and the ablation range can obtain a sphere larger than 3cm.

Description

technical field [0001] The invention relates to a microwave ablation electrode used under a bronchoscope, belonging to the technical field of microwave ablation. Background technique [0002] With the advancement of tumor treatment science, considerable progress has been made in clinical microwave ablation of tumors in recent years. Microwave ablation is the use of microwave energy to act on the tissue to immediately produce a thermal effect. Within a few minutes, a stable spherical heat field is formed. The center temperature is greater than 100°C and the edge is greater than 60°C. The tumor tissue is instantly coagulated and inactivated at high temperature, and then Gradually ablate to achieve the therapeutic purpose. Due to its high safety, small trauma and controllable effect on tissue, microwave ablation technology is more and more respected by doctors, and it will become the first choice of tumor ablation technology in the future. [0003] Lung cancer is one of the m...

Claims

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Application Information

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IPC IPC(8): A61B18/18
CPCA61B18/1815A61B2018/00011A61B2018/00541A61B2018/00589A61B2018/1869
Inventor 孙加源
Owner NANJING VISON CHINA MEDICAL DEVICES R & D CENT