Anesthesia machine CO₂absorber bypass

摘要

A CO2 absorber bypass for an anesthesia machine includes a diverter for diverting exhaled gas to bypass the CO2 absorber of the anesthesia machine when the diverter is activated. The CO2 absorber bypass further includes a shunt for conveying the diverted exhaled gas, a coupler for connecting the shunt to the inhalation limb of the anesthesia machine, a shunt one way valve, a shunt adjustable pressure limiting valve, and a shunt reservoir. The CO2 absorber bypass allows the CO2 absorber to be changed while the exhalation limb conveys exhaled gas from a patient and the inhalation limb conveys gas to the patient.

主权项

1. A CO2 absorber bypass for an anesthesia machine having an exhalation limb for conveying exhaled gas from a patient through a reservoir, a one way exhalation valve, and an adjustable pressure limiting valve to an entry port of a CO2 absorber, an exiting port of the CO2 absorber coupled to a connector for incoming gas, the connector coupled to an inhalation limb through a one way inhalation valve, the inhalation limb for conveying gas to the patient, the CO2 absorber bypass comprising:
a diverter for diverting exhaled gas to bypass the CO2 absorber when the diverter is activated, the diverter being located upstream the one way exhalation valve; a shunt for conveying the diverted exhaled gas; a coupler for connecting the shunt to the inhalation limb; a shunt one way valve located between the coupler and diverter; a shunt adjustable pressure limiting valve; and a shunt reservoir, wherein the CO2 absorber bypass allows the CO2 absorber to be changed while the exhalation limb conveys exhaled gas from a patient and the inhalation limb conveys gas to the patient, wherein the shunt is located between the coupler and the diverter with a first end at the coupler and a second end at the diverter, and wherein the diverter includes a valve having an open position in which exhaled gas is diverted to bypass the CO2 absorber and a shut position in which no exhaled gas is diverted to bypass the CO2 absorber.