Microwave ablation therapeutic apparatus with microwave ablation needle protected based on microwave power detection

Abstract

The invention discloses a microwave ablation therapeutic apparatus with a microwave ablation needle protected based on microwave power detection. The microwave ablation therapeutic apparatus comprises the microwave ablation needle 1, a microwave ablation instrument 6, a coupler 2, a forward detection wave processing module 3, a reverse detection wave processing module 4 and a signal processing module 5. The microwave power output by the microwave ablation instrument 6 is transmitted to the microwave ablation needle 1 through a main feeder 23, the microwave power output by the microwave ablation instrument 6 outputs power through a coupling part of a forward coupler 21, wave detection is achieved through the forward detection wave processing module 3, and then a microwave output power value is obtained; part of the reflection power of the microwave ablation needle 1 is reflected through a coupling part of a reverse coupler 22, detection wave treatment is conducted through the reverse detection wave processing module 4, and then a microwave reflection power value is obtained; the signal processing module 5 calculates the energy injected into ablated tissue according to the monitored microwave output power value and the microwave reflection power value, and the output power of the microwave ablation instrument 6 is adjusted or cut off.

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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