Patent ID: 11925756
Assignee: SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO., LTD.
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A  G

Claim 0:
1. An anesthetic output concentration monitoring method, comprising:
monitoring, through a first sensor and a second sensor, a flow of a fresh gas flowing into a breathing circuit and a flow of an inhaled gas of an anesthetized object to obtain a fresh gas flow rate and an inhaled gas flow rate, respectively;
when the inhaled gas flow rate is greater than the fresh gas flow rate, monitoring, through a third sensor, concentrations of anesthetic in the inhaled gas and an exhaled gas of the anesthetized object to obtain an inhaled gas anesthetic concentration and an exhaled gas anesthetic concentration, respectively;
using the exhaled gas anesthetic concentration and a concentration of carbon dioxide in the exhaled gas to calculate, through a processor, a concentration of anesthetic in a gas reflowing into an inspiratory branch, in the exhaled gas, to obtain a re-inhaled gas anesthetic concentration; and
using the fresh gas flow rate, the inhaled gas flow rate, the inhaled gas anesthetic concentration, and the re-inhaled gas anesthetic concentration to calculate, through the processor, a concentration of output anesthetic of an anesthetic output device to obtain an anesthetic output concentration.