Title:
ANESTHETIC GAS CONCENTRATION MEASUREMENT SYSTEM AND METHOD
Document Type and Number:
WIPO Patent Application WO/2021/139789
Kind Code:
A1
Abstract:
An anesthetic gas concentration measurement system. The concentration of an anesthetic agent in a mixed gas can be measured by switching a control valve (9, 16, 17, 18, 19) and using only one ultrasonic concentration sensor (11). The size and the cost of the system are reduced; measurement errors caused by sensor differences are eliminated; the concentration of a first mixed gas can be calculated according to the flow of each component in the first mixed gas measured by a flow sensor (8) in real time; before the anesthetic agent is introduced into a patient every time or at every time interval, the concentration sensor (11) is used for calibrating concentration data calculated according to data output by the flow sensor (8); after calibration, the concentration sensor (11) continuously measures the concentration of a second mixed gas in real time; the concentration of the anesthetic gas can be obtained according to the concentration of the second mixed gas and the concentration of the first mixed gas obtained after calibration, the real-time performance and the accuracy of anesthetic gas concentration measurement are both considered, and the risk of cross mixing of residual gas in a pipeline due to frequent switching of a solenoid valve is reduced.
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Inventors:
XIONG YOUHUI (CN)
WU JUN (CN)
LI CHONGYANG (CN)
WU JUN (CN)
LI CHONGYANG (CN)
Application Number:
PCT/CN2021/070930
Publication Date:
July 15, 2021
Filing Date:
January 08, 2021
Export Citation:
Assignee:
CUBIC SENSOR AND INSTR CO LTD (CN)
International Classes:
G01N29/02; A61M16/01; G01D21/02
Foreign References:
| CN111060589A | 2020-04-24 | |||
| CN102811757A | 2012-12-05 | |||
| CN101329228A | 2008-12-24 | |||
| CN104267154A | 2015-01-07 | |||
| CN101639744A | 2010-02-03 | |||
| CN102908705A | 2013-02-06 | |||
| CN209783650U | 2019-12-13 | |||
| US5727545A | 1998-03-17 | |||
| US5832917A | 1998-11-10 |
Attorney, Agent or Firm:
WUHAN ZHICHANSHIDAI INTELLECTUAL MPROPERTY CO., LTD (CN)
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