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Medishield AGS system and servo 900 ventilators
Author(s) -
GRAY W. M.,
HALL R. C.,
CARTER K. B.,
SHAW A.,
THOMSON W. J.
Publication year - 1984
Publication title -
anaesthesia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.839
H-Index - 117
eISSN - 1365-2044
pISSN - 0003-2409
DOI - 10.1111/j.1365-2044.1984.tb06526.x
Subject(s) - medicine , suction , scavenging , alarm , mechanical ventilator , anesthesia , automotive engineering , servo , ventilation (architecture) , breathing , positive end expiratory pressure , mechanical ventilation , mechanical engineering , electrical engineering , engineering , biochemistry , chemistry , antioxidant
Summary The use of the new Medishield anasthetic gas scavenging system with ventilators in the Siemens‐Elema Servo 900 series was investigated. It was discovered that this combination of equipment creates the hazard that a disconnexion in the patient breathing system may not be detected by the ventilator alarm. This happens because the suction generated by the scavenging system draws a considerable flow of room air through the expiratory system of the ventilator when a disconnexion occurs. Possible solutions to the problem were investigated, and it was discovered that the problem can be overcome by applying a small amount of positive end‐expiratory pressure to counteract the suction from the scavenging system.