An instrument for polypectomy and removal in one step

Abstract

The invention relates to an instrument for cutting out and taking out a polypus in one step. The instrument is provided with a snare, a net bag, a rigid plastic pipe and a drawing wire. The net bag is fixed to the snare. The near end of the drawing wire is provided with a push-pull handle. The drawing wire is located in the rigid plastic pipe. An auxiliary handle is fixedly connected to the near end of the rigid plastic pipe. The instrument for cutting out and taking out the polypus in one step has the advantages that the net bag is arranged on the snare, the polypus can be taken back while cutting out, operation is convenient, the polypus is easy to fall off and does not need to be grabbed through other instruments any longer, the completeness of the polypus can be reserved when the polypus is taken back in the net bag so as to be beneficial to pathological biopsy of the polypus, the nature of the polypus and whether canceration happens or not are examined, and the instrument has the great value for determining further follow-up visit and treatment.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a one-step polypectomy and removal instrument. Background technique [0002] Gastrointestinal polyps refer to the overgrown tissue formed by the localized hyperplasia of the gastrointestinal mucosa protruding into the cavity. Its general appearance, tissue structure and biological characteristics can vary. There are many reasons for the onset, mainly related to family genetic factors, Inflammation and other chronic stimuli, race, dietary composition (high fat, high animal protein, low fiber) and other factors are related. [0003] For patients with gastrointestinal polyps, under gastroscopy or colonoscopy, after the polyps are removed by high-frequency electrocuffs, the polyps need to be taken out for pathological biopsy to check their nature and whether there is malignant transformation, and decide on further follow-up and treatment Therefore, it is necessary to rec...

AI Technical Summary

Problems solved by technology

When the gastrointestinal endoscope removes polyps, it needs to be taken out by special grasping forceps or sucked on the mirror surface by negative pressure, and withdrawn with the gastrointestinal endoscope; partially removed polyps slide into the intestinal cavity, which is difficult to grasp, and the doctor gives up grasping and asks the patient to pay attention Excreted with the stool, and then sent for biopsy; some small polyps are easily inhaled into the recovery bottle by negative pressure after resection, and cannot be separated for inspection

For multiple polyps, under gastroenteroscopy, it is necessary to grab the polyps and exit the endoscope, enter the endoscope again, look for the second one, re-excision, repeated entry and exit, the patient is painful, and the operation is delayed, causing a lot of inconvenience

[0004] Secondly, when high-frequency electrocution is used to resect polyps, the current density per unit area is high when the electric cutting current is energized, and the local tissue reaches high temperature in an instant, causing tissue water to evaporate and necrosis to achieve the cutting effect. However, since polyps are located on the gastrointestinal mucosa, if the cutting If the point is too close to the root mucosa, the effective tissue of the gastrointestinal wall will be reduced, causing the wound to rupture and perforate. However, clinicians always cut according to experience, and the distance between the polyp cutting point and the root cannot be accurately judged. Cutting too far from the base of the polyp will result in incomplete cutting, and cutting too close to the polyp will cause perforation

[0005] In addition, because the gastrointestinal tissue is a peristaltic tissue, there is no support point when using instruments to cut polyps, and there are the following disadvantages when cutting polyps. It is not convenient to position the instrument at the position of the polyp. Experienced doctors are required to accurately position the instrument at the polyp. On the polyp, and when the polyp is cut, the polyp has no support point and is easy to move, making the polyp cut incomplete

[0006] To sum up, there is an urgent need for a device with a support point, which can measure the distance of the cutting point, and synchronize polypectomy and recovery, but there is no report on this device so far

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