A microwave ablation therapy instrument based on microwave power detection and protection of microwave ablation needles

Abstract

The invention discloses a microwave ablation treatment instrument based on microwave power detection and protection of microwave ablation needles, which comprises a microwave ablation needle 1, a microwave ablation instrument 6, a coupler 2, a forward detection processing module 3, a reverse detection processing module 4, The signal processing module is composed of 5. The microwave power output by the microwave ablation instrument 6 is delivered to the microwave ablation needle 1 through the main feeder 23; the microwave power output by the microwave ablation instrument 6 is coupled to the output power by the forward coupler 21, and is detected by the forward detection processing module 3 to obtain microwave output power value; the reflected power of the microwave ablation needle 1 is coupled by the reverse coupler 22 to part of the reflected power, and is detected and processed by the reverse detection processing module 4 to obtain the microwave reflected power value; the signal processing module 5 is based on the monitored microwave output power value and microwave The reflected power value calculates the energy injected into the ablated tissue, and adjusts or cuts off the output power of the microwave ablation therapy apparatus 1 .

Description

technical field [0001] The invention relates to a microwave ablation treatment instrument with a microwave ablation needle protection device, in particular to a microwave ablation treatment instrument for protecting a microwave ablation needle based on microwave output power and reflection power detection. Background technique [0002] Microwave thermal ablation is a minimally invasive targeted therapy for solid tumors. During ablation therapy, the tissue trauma is small and there is no bleeding, which can inactivate the tumor in situ clinically as a whole, and the postoperative recovery is fast, which can reduce the pain and pain of surgery for patients. economic burden. However, the existing microwave ablation instruments and ablation needles generally have the following problems in clinical use: [0003] 1. After the water circulation is blocked, the temperature of the ablation needle will rise rapidly as the working time increases. When the temperature at the joint bet...

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Problems solved by technology

With the increase of working time, the temperature of the standing wave point rises rapidly, which increases the risk of the needle falling into the ablated tumor tissue

[0004] 2. The matching material PTFE (polytetrafluoroethylene) at the joint between the needle head and the needle shaft of the ablation needle is soft. bent needle

Finally, the needle and the needle bar will be short-circuited and the needle will be blown.

[0005] 3. The power output of existing microwave ablation instruments is basically an open-loop circuit, and it is impossible to quantify the effective power and reflected power entering the ablated tumor tissue. For example, a power detection device is installed in the microwave ablation instrument control system or an output power monitor is installed externally. The control device can detect the microwave output power of the instrument and the reflected power of the microwave ablation needle in real time, and can adjust the output power in real time according to the data on the side, so as to avoid the risk of needle breakage and at the same time obtain the microwave radiation energy in the ablated tumor tissue. Provide scientific quantitative basis for the ablation range

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