A flexible probe assembly for cryotherapy of human tumors

Abstract

The embodiment of the present invention discloses a flexible probe assembly for cryotherapy of human tumors, which includes an outer sleeve and a probe body nested in the outer sleeve, and the probe body includes a needle at the front end and the needle shaft part away from the needle head, a flexible connection section is set between the needle head and the needle shaft part, and the end of the needle shaft part far away from the needle head is connected to the handle part; it also includes a medium inflow A port and a medium return port, and a medium passage that is at least partially located inside the probe body and communicates with both the medium inlet port and the medium return port, and at least part of the outer wall of the medium passage is provided with a heat insulating layer; The flexible connecting section is a cavity structure formed by connecting several hollow joint units in series, and a steering rope is arranged in the cavity structure. The flexible probe assembly can integrate three operations into one needle, which is flexible and efficient.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a flexible probe assembly for cryotherapy of human tumors. Background technique [0002] For a long time, rational treatment of human tumor tissue has been the goal pursued by clinical hospitals. So far, various approaches such as radiation therapy, chemotherapy, hyperthermia and cryoablation have been developed. It has many advantages such as large size, wide indications and immunological effects, and has been widely recognized by experts. The basic principle of cryoablation therapy is to freeze tumor cells to form ice crystals in the cells and destroy the cells, so as to achieve the purpose of destroying cancerous cells. [0003] However, the clinical use of cryoablation needles for tumors is still limited to a certain extent. For certain cavity tumors such as lung cancer and rectal cancer, it is required that the inserted cryoablation needles should be flexible to minimize the ...

AI Technical Summary

Problems solved by technology

[0003] However, the clinical use of cryoablation needles for tumors is still limited to a certain extent. For certain cavity tumors such as lung cancer and rectal cancer, it is required that the inserted cryoablation needles should be flexible to minimize the The tissue damage caused by the ablation needle during its natural sliding into the lumen (such as alveoli, etc.); , the traditional puncture needle cannot change the direction of puncture after entering the human body with the help of a navigation system (CT, ultrasound or nuclear magnetic resonance, etc.) because the entire needle body is made of metal material. Traditional ablation needles cannot achieve the above goals at all when they are in an out-of-plane position relationship with the puncture path (usually a venous vessel)

[0004] In addition, traditional ablation needles cannot achieve the function of biopsy sampling of targeted tissues, and can realize the removal of diseased tissues from patients by cutting, clamping or puncturing for pathological examination

The biopsy sampling needle and the cryoablation needle are independent, and doctors cannot use them more conveniently and flexibly

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