Forceps channel tube of medical flexible endoscope and preparation method of forceps channel tube

Abstract

The invention relates to a forceps channel tube of a medical flexible endoscope and a preparation method of the forceps channel tube. The innovation points are that the forceps channel tube comprisesa polytetrafluoroethylene hose and a spring, wherein one end of the polytetrafluoroethylene hose is provided with a bent portion integrated with the polytetrafluoroethylene hose; the outer wall of thebent portion is provided with a spiral spring groove; and the spring is arranged in a spring groove of the bent portion. The preparation method of the forceps channel tube comprises the specific steps of material selection, forming of the spring groove in one end of the polytetrafluoroethylene hose, processing of the spiral spring, integral combination and assembly of the steel wire spiral compression spring and the polytetrafluoroethylene hose, and glue bonding of a reinforcing section of the spring of the forceps channel tube. Each circle of the spring is prevented from slipping off from the spiral spring groove of the polytetrafluoroethylene hose. The preparation process is reasonable and simple, endoscopic surgical instruments such as biopsy forceps and calculus removing baskets can be conveniently inserted in and can smoothly pass through the forceps channel tube, the hole wall of an inner hole of the forceps channel tube is high in abrasion resistance, the forceps channel tube is long in service life, low in production cost and convenient to clean and disinfect, bacteria cannot be hidden in a channel, and cross infection can be effectively avoided.

Description

technical field [0001] The invention relates to a clamp tube, in particular to a clamp tube of a medical flexible endoscope and a preparation method thereof, belonging to the technical field of medical instruments. Background technique [0002] The clamp catheter of medical flexible endoscope is an important part of the endoscope in medical equipment. Use it to take biopsy samples inside the body, remove foreign bodies, polyps, etc. It can be operated freely, and the patient is free from unnecessary pain, so it has positive significance in the diagnosis and treatment of the stomach, intestines, and duodenum. [0003] The structure of the clamp tube of the original medical flexible endoscope is a three-layer thin-walled expanded PTFE tube, the inner layer is a high-density expanded PTFE hose, and the outer layer is a high-density expanded PTFE tube. Ethylene wrapping tape or polytetrafluoroethylene high-density film tape is used to wrap and seal the inner expanded polytetra...

AI Technical Summary

Problems solved by technology

Its main defects are: first, the texture of the expanded PTFE foam tube is relatively soft, the surface is rough, and there are tiny holes that are easy to hide bacteria or viruses, which brings great difficulties to cleaning and disinfection, or the cleaning and disinfection is not up to standard, and cross infection is prone to occur The 2nd, the strength of the foamed PTFE tube of the clamp channel tube is poor and not wear-resistant, and the PTFE foamed tube soaked in disinfectant or sterilized is not wear-resistant even more. When the clamp tube of the speculum is inserted, the wall of the inner hole of the three-layer clamp tube will be scratched many times to form a place where bacteria and viruses can be hidden, and it cannot be cleaned and disinfected, and cross-infection is prone to occur; When the clamp pipe is punctured into a hole, the endoscope is severely damaged and cannot be used, causing great economic losses and increasing maintenance costs; the third is that the clamp pipe of this structure can ensure that the inner hose and the outer The bonding strength between the layered tubes and the sealing requirements of the tube wall need to increase a variety of production processes, such as manual gluing, manually wrapping the expanded polytetrafluoroethylene tape around the inner tube, not only need to increase more The cost of this kind of auxiliary material and process is high, and there are many production personnel to be equipped, and the labor cost is high. There are many parts, and there are mutual extrusion between the parts

Especially when the front-end bending part is bent again, the extrusion force between the parts will increase, and sometimes the "three-layer forceps tube" will be squeezed into an oval at the bend. The forceps just can't pass through the position squeezed and deformed by the forceps tube, and the sampling operation can't be performed

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