Unidirectional valve malfunction by the breakage or malposition of disc: two cases report.
10.4097/kjae.2013.65.4.337
- Author:
Chol LEE
1
;
Kyu Chang LEE
;
Hye Young KIM
;
Mi Na KIM
;
Eun Kyung CHOI
;
Ji Sub KIM
;
Won Sang LEE
;
Myeong Jong LEE
;
Hyung Tae KIM
Author Information
1. Department of Anesthesiology and Pain Medicine, Wonkwang University College of Medicine, Iksan, Korea.
- Publication Type:Case Report
- Keywords:
Capnography;
Hypercapnia;
Unidirectional valve
- MeSH:
Barotrauma;
Capnography;
Hypercapnia;
Respiration;
Ventilation
- From:Korean Journal of Anesthesiology
2013;65(4):337-340
- CountryRepublic of Korea
- Language:English
-
Abstract:
Malfunction of the unidirectional valve in a breathing circuit system may cause hypercapnia from the rebreathing of expired gas, ventilation failure, and barotrauma. Capnography is a useful method for monitoring the integrity of the unidirectional valve. We experienced two cases of malfunction of a unidirectional valve which caused leakage and reverse flow, diagnosed early as a change of the capnographic waveform. One case was caused by expiratory unidirectional valve breakage. The other was caused by an incorrectly-assembled inspiratory unidirectional valve.
