title: A safety block for scavenging systems.
abstract: A safety block is described which protects the patient from expiratory obstruction when using scavenging systems, and provides the anaesthetist with a visual and auditory check on the functioning of the system.
mesh_terms: D000769:Anesthesia, Inhalation / Q000295:instrumentation*; D006801:Humans; D012134:Respiratory Protective Devices