Magnetic resonance compatible water cooling microwave ablation needle

Abstract

The invention provides a magnetic resonance compatible water cooling microwave ablation needle, which comprises a zirconium oxide needle head, a titanium alloy needle pipe, a coaxial cable, a water inlet pipe, a water outlet pipe, a water tank, a radio frequency coaxial connector and a needle handle, wherein the coaxial cable is inserted into the titanium alloy needle pipe; the front end of the coaxial cable is inserted into the zirconium oxide needle head; the tail end of the zirconium oxide needle head is inserted into the front end of the titanium alloy needle pipe to be bonded and fixed with the front end of the titanium alloy needle pipe; the water inlet pipe is inserted into the titanium alloy needle pipe; the water tank sleeves the tail end of the titanium alloy needle pipe; UV glueis used for bonding and fixation; the water outlet pipe is inserted into the water tank; the UV glue is used for bonding and fixing the end port of the water tank onto the coaxial cable, the water inlet pipe and the water outlet pipe; water sealing is performed; the radio frequency coaxial connector is welded with the tail end of the coaxial cable; the needle handle covers the water tank and theradio frequency coaxial connector.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a magnetic resonance-compatible water-cooled microwave ablation needle, which is suitable for minimally invasive interventional ablation treatment in a nuclear magnetic resonance environment. Background technique [0002] In recent years, image-guided minimally invasive interventional microwave ablation of tumors has been widely used clinically. At present, most microwave tumor ablation is guided by CT or ultrasound, and the microwave ablation needle is percutaneously punctured into the center of human tissue lesions. Coagulation, dehydration and necrosis, microwave tumor ablation has high efficiency, high safety, small trauma and few complications. [0003] As the mainstream image guidance for minimally invasive intervention, CT has ionizing radiation, which is harmful to the human body, and the resolution of ultrasound images is not high, which is limited i...

AI Technical Summary

Problems solved by technology

[0005] 1. Most of the existing microwave ablation needles are not compatible in the magnetic resonance environment, and there are artifacts in image scanning, so they cannot be used in the magnetic resonance environment

[0006] 2. The ablation area of ​​existing microwave ablation needles is an elongated ellipse shape, while the shape of the tumor is spherical. If you want to completely inactivate tumor tissue, you must increase the ablation range to cause damage to normal human tissue

[0007] 3. The front end of most existing microwave ablation needles is a metal needle, which is fixed by welding with the coaxial cable inside the needle tube, which is easy to fall off during the operation and has low safety

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