Multipole radiofrequency tumor ablation with plasma radiofrequency

It is a new minimally invasive treatment technology for solid tumors that has emerged in recent years, which can make patients avoid the pain of operation. Compared with traditional treatment, it has the advantages of high efficacy, less trauma, less pain, quick recovery, no sequelae, no risk, and wide indications. It is praised as a green treatment technology by experts at home and abroad. The tolerance of tumor cells to heat is worse than that of normal cells. When the temperature reaches 39-40℃ locally, cancer cells can stop dividing, and when it reaches 41-42℃, cancer cells can die or cause DNA damage, and irreversible cell damage occurs above 49℃. The radiofrequency electrode of the cluster electrode emits high frequency radiofrequency waves to stimulate the tissue cells to carry out plasma shock, and the heat generated can make the local temperature reach more than 90℃, so as to kill the tumor cells quickly and effectively.

The principle of this technology is that under the guidance of CT and color B-ultrasound, the multipole mother needle ablation electrode is accurately pierced into the tumor site. Under the control of the computer, the plasma radiofrequency instrument conducts the RF pulse energy through the multipole needle to the tumor tissue, so that the tumor tissue generates local high temperature (70 ℃ -95 ℃). In this way, the tumor tissue and its adjacent tissues that may be spread are coagulated and necrotic, and necrotic tissues are organized or absorbed in situ.

Indications: Radiofrequency PLASMA surgery can be used for benign and malignant solid tumors of human organs. At present, the clinical application is more: liver cancer, lung cancer, breast cancer. Patients with primary tumors, metastatic tumors, advanced tumors that cannot be resected surgically, tumors that cannot be completely resected by intraoperative exploration, and tumors that cannot withstand radiotherapy and chemotherapy can all receive radiofrequency plasma therapy.

The treatment is performed under local anesthesia for about 1-2 hours. The patient can listen to music and watch TV while receiving tumor ablation treatment, which has a high safety coefficient. Compared with the traditional tumor treatment method, the cost is low, the pain is small, and the recovery is fast. Combined with chemotherapy or radiotherapy, the patients' life can be prolonged, the quality of life can be improved, and the pain of patients can be alleviated.

The development of plasma RF has a long history, so the technology has been constantly improved and mature, and the efficacy is exact. The plasma radiofrequency needle has developed from the original unipole to multipole. The effective ablation range of the unipole is small, and the effect on large tumors is poor. Therefore, the present cluster multipole needle has been developed. It has been proved that if a tumor of 7cm diameter is treated with a spherical lesion of 4cm diameter, 22 points are needed to completely cover the tumor (the practical operation is difficult). To destroy the foci with a 5cm diameter sphere, 12 spots are also required. In response, RITA, an American company, has developed a range of radiofrequency needles for tumors of different sizes.

Choose individualized according to tumor size plasma radiofrequency needle diameter 3 cm below the tumor can choose the first generation of umbrella or unipolar multipolar needle, but due to the effect of temperature conduction, all kinds of single needle damage small oven (pictured), more than 3 cm larger tumor destruction will not be complete, even with single needle points tumor more damaged, can not completely cover, The damage to the normal lung tissue of patients is also greater. Tumors with a diameter of 3cm to 5cm should be selected as the second-generation multipole needle. The second-generation anchor multipole needle developed by RITA Company in the United States can ablation more than 5cm in diameter at a time, so it is suitable for all tumors below 5cm. The latest third generation super needle should be selected for tumors with a diameter of 5cm to more than 7cm. It has been proven that if a tumor with a diameter of 4cm is treated with a spherical lesion, 22 points are needed to completely cover the tumor (the practical operation is difficult). To destroy the foci with a 5cm diameter sphere, 12 spots are also required. American RITA company recently developed the third generation of super multi-pole needle, a diameter of 7cm or more, and the use of a special injection pump, so that the heat conduction faster and more uniform, treatment time greatly shortened, the treatment of large tumors more exact effect, more relaxed patients

Generally, local anesthesia and CT scan are used to locate the tumor, and the tumor is punctured (percutaneous) according to the measured distance and Angle. After the electrode is inserted into the tumor center, the electrode is unfolded and the plasma radiofrequency is started.

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