High-frequency incision knife with accurate fixed-length knife bit for endoscope

Abstract

The invention discloses a high-frequency incision knife with an accurate fixed-length knife bit for an endoscope, which comprises the knife bit and a core rod. A handle is arranged at the tail end of the core rod, one portion of the knife bit is located in the core rod while the other portion of the knife bit extends out of the core rod, and the knife bit can retractably move in the core rod. An insulation outer tube is arranged on the portion, which extends out of the core rod, of the knife bit, the core rod is provided with a control part for controlling movement of the knife bit, a clamp part is disposed on the outer wall of the knife bit located in the insulation outer tube, a limiting block matching with the clamp part is disposed on the inner side of the insulation outer tube, as the clamp part matches with the limiting block, the longest distance of the knife bit extending out of the core rod can be controlled, and further the length of the knife bit is fixed accurately. The high-frequency incision knife with the accurate fixed-length knife bit for the endoscope is simple in structure and flexible in operation, and is safe and reliable, as the high-frequency incision knife is provided with a positioning mechanism, the length of a portion incised by the incision knife is fixed accurately, and the high-frequency incision knife is favorable for increasing ESD (endoscopic submucosal dissection) surgery efficiency. Compared with a traditional incision knife, the high-frequency incision knife has the advantages that surgery risks can be reduced, intraoperative complications are decreased, and sufferings of patients are relieved.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a high-frequency incision knife for excising mucosal tissue under an endoscope, in particular to an endoscopic high-frequency incision knife with a precisely lengthened blade. Background technique [0002] As we all know, endoscopic submucosal dissection (Endoscopic Submucosal Dissection, ESD) is a method to perform mucosal resection of gastrointestinal lesions. ESD surgery is generally first to inject liquid into the submucosal layer of the lesion to bulge the tissue to be resected, then use a high-frequency incision knife and other instruments to incise (cut circle) along the edge of the raised lesion, and then inject the liquid repeatedly under the mucosa and along the The submucosa is gradually peeled off the diseased tissue until the lesion is resected. [0003] Because of the high-frequency incision technique involved, there is a risk of perforation, and doctors need to ...

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: the purpose of the present invention is to provide a precise determination of the length of the knife head in view of the problem that the extension length of the high-frequency incision knife used in the current ESD process cannot be accurately controlled, and the clinical practice requires accurate length of the knife head. Long endoscopic high frequency incision knife

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