title: Intermittent oxygen delivery in an Ohmeda Unitrol anesthesia machine due to a faulty O-ring check valve assembly.
authors: D A
authors: DA
authors: Varga
authors: J S
authors: JS
authors: Guttery
authors: B L
authors: BL
authors: Grundy
mesh_terms: D000776:Anesthesiology / Q000295:instrumentation*; D004867:Equipment Design; D004868:Equipment Failure; D010106:Oxygenators