Main hose device of colonoscope

Abstract

A main hose device of a colonoscope comprises a body consisting of a knitted net tube and a spring tube, wherein the body comprises a front connection part, a middle part and a back connection part; the periphery of the knitted net tube of the middle part is coated with a medical polyurethane layer, and the spring tube of the middle part comprises a front section, a middle section and a back section which are integrated; the pitch P1 of the front section ranges from 1mm to 3 mm, the pitch P2 of the middle section ranges from 1.8 mm to 4.5 mm, the pitch P3 of the back section ranges from 2.5 mm to 6.5 mm, and P2 is larger than P1 and smaller than P3; the Shore hardness A1 of the medical polyurethane layer coating the periphery of the knitted net tube at the front section of the spring tube ranges from 35 to 50, the Shore hardness A2 of the medical polyurethane layer coating the periphery of the knitted net tube at the middle section ranges from 51 to 60, and the Shore hardness A3 of the medical polyurethane layer coating the periphery of the knitted net tube at the back section ranges from 61 to 90. The main hose device has at least three sections with different flexibility, is good in bending performance and convenient to insert and cannot cause injuries to patients easily.

Description

technical field [0001] The invention relates to a main hose device, in particular to a main hose device of a medical flexible colonoscope. Background technique [0002] During the clinical operation of the colonoscope, the existing doctor adjusts the relevant functions of the colonoscope, and then inserts the main hose device from the patient's anus, and continuously inserts and sends the main hose device of the colonoscope body. It can then pass through the sigmoid colon, descending-B transition, splenic flexure, and hepatic flexure to reach the cecum and terminal ileum. During the inspection, the doctor continuously shortens and straightens the colon, or rotates the flexible tube of the mirror body, so that it can pass through the intestinal parts of the lower digestive tract smoothly for inspection. The softness of the entire main hose device in the past is the same. Some main hose devices are too soft, that is, the Shore A hardness of the polyurethane layer wrapped arou...

AI Technical Summary

Problems solved by technology

The softness of the entire main hose device in the past is the same. Some main hose devices are too soft, that is, the Shore A hardness of the polyurethane layer wrapped around the main hose device is greater than 90, and some are too soft. , that is, the Shore A hardness of the polyurethane layer coated on the outer periphery of the main hose device is less than 35. Therefore, because the flexibility of the main hose device is too hard or too soft, it will be difficult to advance and retreat during insertion, and it is easy to cause inability to Identify the position of the lumen of the intestinal tube. If the insertion is forced, the patient will feel unbearable pain, and there may even be a risk of intestinal perforation

In addition, there will be damage to the mucosa, which will hinder the detection of small lesions

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