Study on air pressure changes in negative-pressure isolation capsule during casualty transport
10.7687/j.issn1003-8868.2017.05.001
- VernacularTitle:负压隔离舱空中转运过程的舱体气压变化研究
- Author:
Zhichao ZHAO
;
Guohong LI
;
Qiuming SUN
;
Mingxi HU
- Keywords:
negative-pressure;
isolation capsule;
air transport;
safety pressure
- From:
Chinese Medical Equipment Journal
2017;38(5):1-3,8
- CountryChina
- Language:Chinese
-
Abstract:
Objective To prevent the medical personnel from infection during aeromedical evacuation of fulminating respiratory infectious disease patients by exploring the changes of differential pressure between those in and out of the negative-pressure isolation capsule and analyzing the stability of the capsule during aeromedical evacuation.Methods A differential pressure monitor developed by Institute of Medical Equipment was used for real-time recording of the changes the differential pressure in and out of the capsule during five flight phases of the aircraft,and the safety of the capsule during aeromedical evacuation and corresponding considerations were investigated.Results The maximum and minimum values of the negative pressure in the capsule were-60 Pa and-120 Pa respectively during aeromedical evacuation,which were all less than the safety threshold-15 Pa.The negative pressure was is directly proportional to the flying altitude.Conclusion The capsule keeps negative pressure effectively during flight,and thus facilitates patient aeromedial evacuation greatly.
