Main Hose Set for Bronchoscopes

Abstract

Disclosed is a main hose apparatus for bronchoscopes. The main hose apparatus is characterized in that an apparatus body is formed by a knitted net tube and a spring tube and comprises a front connection portion, an intermediate portion and a rear connection portion; the periphery of the knitted net tube on the intermediate portion is coated with a medical polyurethane layer, the spring tube on the intermediate portion comprises a front section, an intermediate section and a rear section which are mutually integrated, the screw pitch of P1, P2 and P3 is 1.5-2.4mm, 2.4-2.8mm and 2.8-3.2mm respectively, the P1 is greater than the P2 which is greater than the P3, and the Shore hardness of A1, A2 and A3 of the medical polyurethane layer is 30-40, 40-55 and 60-80 respectively; the thickness d of the steel strip of the spring tube is 0.06-0.15mm, and the width w of the steel strip is 1.8-2.3mm; and the length of the front section, the intermediate section and the rear section is 170+ / -70mm, 210+ / -70mm and 190+ / -70mm. The main hose apparatus is provided with at least the sections with different flexibility, so that bending property is good, insertion is facilitated, and injuries to patients are not easy to cause.

Description

technical field [0001] The invention relates to a main hose device, in particular to a main hose device of a medical flexible bronchoscope. Background technique [0002] The main hose device of the medical flexible bronchoscope is one of the important and main accessories in the medical endoscope. When a doctor uses a bronchoscope to examine and diagnose a patient's curved and complicated upper respiratory tract, it is more difficult to insert a flexible tube. The front end of the bronchoscope insertion part is the camera assembly, and the main hose device of the insertion part passes through the nasal passage (or oral cavity), nasopharynx, oropharynx, epiglottis, larynx into the trachea, and the left and right bronchi. In the process of intubation, the bending angle of the main hose device of the endoscope should be greater than 90°. In this way, it is necessary to ensure that the inner wall of the patient’s upper respiratory tract and bronchi is not damaged, and to ensure...

AI Technical Summary

Problems solved by technology

[0003] The flexibility of the entire hose of the main hose device of the existing bronchoscope is the same, and some main hose devices are too soft, that is, the Shore A hardness of the polyurethane layer coated on the outer periphery of the main hose device is greater than 80 , some softness is 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 30. Difficulty in intubation will occur during bronchoscopic diagnosis. Of course, some of the reasons are that the structure and performance of the main hose device of the endoscope cannot meet the requirements for use; once the flexibility of the main hose device of the bronchoscope is too hard When it is inserted, it will cause local bleeding, local mucosal damage or complications

If the softness of the main hose set is too soft, intubation difficulties may also occur, and even defects such as failure to insert the position requiring diagnosis

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