Volume-variable bellows device, its use method and breathing circuit of anesthesia machine

Abstract

The invention discloses a variable-volume bellow device, a use method of the bellow device and an anesthesia machine breathing loop. The variable-volume bellow device comprises a bellow cover, a folding bag and a separation plate, wherein the bellow cover is connected onto the anesthesia machine breathing loop; the folding bag is arranged in the bellow cover; the separation plate can vertically move for regulating the volume of the bellow cover; the separation plate is arranged in the bellow cover above the folding bag; the outer peripheral edge of the separation plate is tightly pasted with the inner wall of the bellow cover. The variable-volume bellow device is used for the anesthesia machine breathing loop; the separation plate can be movably installed in the bellow cover for regulating the volume of the bellow cover; the dead cavity in the bellow device in the breathing loop is reduced or eliminated; the use quantity of anesthesia medicine and medical gas is reduced; the surgery cost is reduced; in addition, the response speed of the anesthesia effect is higher; unnecessary time caused by slow anesthetic gas concentration response in the anesthesia surgery process is reduced; wasted time caused by slow anesthesia response in the anesthesia surgery process is reduced.

Description

technical field

[0001] The invention relates to the technical field of medical equipment, in particular to a volume-variable bellows device, its use method and anesthesia machine breathing circuit. Background technique

[0002] In the existing anesthesia machine system scheme, the breathing circuit is the closest to the patient. Its main function and role are: to provide a closed breathing channel for mechanical ventilation or manual ventilation, so that the patient can exhale the CO in the gas. 2 Absorbed by soda lime, the anesthetic gas in the exhaled breath can be rebreathed by the patient. At the same time, the breathing circuit also realizes the monitoring of tidal volume, airway pressure and oxygen concentration.

[0003] Tidal volume is defined as inspiratory tidal volume and expiratory tidal volume according to inspiratory and expiratory volume respectively. Inspiratory tidal volume is the volume of gas inhaled by the patient per minute, while expiratory tidal volum...

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