A. Cryotherapy itself can relieve pain, and it can also be treated under local anesthesia, which is not limited by anesthesia conditions and reduces the surgical risk of patients. However, radiofrequency ablation is hyperthermia, which is very painful under local anesthesia, and it is impossible to complete the operation. Generally, it requires hard anesthesia or general anesthesia, and there are anesthesia conditions. At the same time, anesthesiologists need to carry monitors and anesthesia machines when they go to B-ultrasound room and CT room to anesthetize patients, which not only increases the workload of doctors, but also increases the risk of patients.
B, radiofrequency ablation can only monitor the puncture process under the image, because hyperthermia will produce gasification effect in the treatment area, and the image of the treatment area and the non-treatment area during the operation cannot be judged, so it is impossible to monitor the treatment process and treatment effect. Cryotherapy can not only monitor the puncture process, but also monitor the frozen area during operation and judge the curative effect after operation. Freezing has a temperature monitoring system, which can monitor the temperature of the treatment process in real time.
C, radio frequency belongs to hyperthermia, which is easy to damage large blood vessels. Because of the hot pool effect of blood vessels (that is, the blood flowing in large blood vessels can take away the cold temperature, so it is not easy to form ice hockey around large blood vessels), cryotherapy will not damage large blood vessels. Many doctors have done animal experiments, inserted the cryoprobe directly around blood vessels larger than 4mm and found that the blood vessels were not damaged. It shows that cryotherapy is safe for tumors around great vessels.
D. Although the treatment area of single needle is large, radiofrequency ablation cannot be combined with multiple needles at the same time, so the treatment area is small. Cryotherapy can be combined with multiple needles, and up to 25 needles can be used at the same time, so the treatment area is larger, the treatment time is shortened and the treatment efficiency is improved.
E, the probe is smaller than the RF probe, and the complications are lower and safer.