ANESTHESIA APPARATUS AND HYDROGEN CONCENTRATION CONTROL METHOD IN HYDROGEN CONTAINING ANESTHESIA GAS

摘要

PROBLEM TO BE SOLVED: To provide an anesthesia apparatus capable of accurately measuring a hydrogen concentration in anesthesia gas containing hydrogen gas.SOLUTION: An anesthesia apparatus 1 includes: an anesthesia gas preparation circuit 3 generating anesthesia gas by mixing air or oxygen mixed air and gasified anesthetic agent; a respiration circuit 5 of a closed circuit type or half-closed circuit type including a gas circulation route L11 circulating hydrogen containing anesthesia gas containing hydrogen gas and gasified anesthetic agent; and a hydrogen concentration measurement circuit 6 measuring a hydrogen concentration in the hydrogen containing anesthesia gas in the gas circulation route L11. The hydrogen concentration measurement circuit 6 includes: anesthetic agent removal means 51 removing the gasified anesthetic agent in the hydrogen containing anesthesia gas; and hydrogen concentration measurement means 52 arranged on a secondary side of the anesthetic agent removal means.SELECTED DRAWING: Figure 1