Attraction sheath and use method thereof

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to an attraction sheath and a using method thereof. The attraction sheath comprises a plastic outer sheath, an inner sheath and a perfusion outer sheath, the perfusion outer sheath is fixedly arranged on the inner sheath, a first perfusion channel is formed between the inner wall of the perfusion outer sheath and the outer wall of the inner sheath, and a supporting piece is arranged on the outer wall of the inner sheath or the inner wall of the plastic outer sheath in a protruding and extending mode; the plastic outer sheath is detachably arranged on the inner sheath in a sleeving mode and supported by the inner sheath through a supporting piece, a second infusion channel is formed between the inner wall of the plastic outer sheath and the outer wall of the inner sheath and communicated with the first infusion channel, and the plugging ring is arranged between the infusion outer sheath and the plastic outer sheath and used for plugging an opening between the infusion outer sheath and the plastic outer sheath. The plastic outer sheath is reserved, the operation safety is improved, the supporting piece and the plugging ring are arranged, the plastic outer sheath and the inner sheath can be tightly attached while the opening is plugged, the second perfusion channel and the first perfusion channel are communicated and do not have other branches or openings, and perfusion equipment is convenient to use.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a suction sheath and a method for using the same. Background technique [0002] The requirement of the ultra-micro channel for surgical instruments is: the outer diameter of the straight sheath should be as small as possible, but the maximum perfusion and return water should be retained. In the past, the sheath was a plastic sheath, and the material could not meet the required hardness and interlayer thickness. At present, it is generally changed to a double-layer metal sheath, but the following shortcomings are found in actual work: 1. Because it is made of metal, it is more difficult to expand than plastic sheaths. It will feel relatively dry and have high resistance. 2. There are hidden dangers of blood clot blockage in the metal interlayer, inconvenient cleaning, and substandard disinfection. [0003] The application number is "CN20142039", and the Chines...

AI Technical Summary

Problems solved by technology

In the past, the sheath was a plastic sheath, and the material could not meet the required hardness and interlayer thickness. At present, it is generally changed to a double-layer metal sheath, but the following shortcomings are found in actual work: 1. Because it is made of metal, it is more difficult to expand than plastic sheaths. It will feel relatively dry and the resistance is relatively high. 2. There are hidden dangers of blood clot blockage in the metal interlayer, inconvenient cleaning, and substandard disinfection

[0003] The application number is "CN20142039", and the Chinese utility model patent titled "a percutaneous kidney pressure automatic balance circulating water perfusion suction stone removal device" records a stone removal device with detachable outer sheath and inner sheath, which solves the problem of The metal interlayer is inconvenient to clean and difficult to disinfect, but the outer sheath can only use metal sheaths. When using plastic outer sheaths, there will be the following problems, such as inconvenient installation, and the outer sheath will fit the inner sheath during use, resulting in perfusion The effect is poor. In addition, the outer sheath and the inner sheath are snap-fitted, so there are doubts about water leakage and tightness of the connection.

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