US 11,925,756 B2
Anesthesia machine, anesthetic output concentration monitoring method, system, and device, and storage medium
Congying Wan, Shenzhen (CN); Xiaoyong Zhou, Shenzhen (CN); and Peitao Chen, Shenzhen (CN)
Assigned to SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO., LTD., Shenzhen (CN); and SHENZHEN MINDRAY SCIENTIFIC CO., LTD., Shenzhen (CN)
Filed by SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO., LTD., Shenzhen (CN); and Shenzhen Mindray Scientific Co., Ltd., Shenzhen (CN)
Filed on Apr. 13, 2020, as Appl. No. 16/847,640.
Application 16/847,640 is a continuation of application No. PCT/CN2017/107997, filed on Oct. 27, 2017.
Prior Publication US 2020/0238033 A1, Jul. 30, 2020
Int. Cl. A61M 16/00 (2006.01); A61M 16/01 (2006.01); A61M 16/22 (2006.01); G16H 40/60 (2018.01)
CPC A61M 16/024 (2017.08) [A61M 16/01 (2013.01); A61M 16/22 (2013.01); G16H 40/60 (2018.01); A61M 2016/0018 (2013.01); A61M 2016/0039 (2013.01); A61M 2230/437 (2013.01)] 20 Claims
OG exemplary drawing
 
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.