title: Bidirectional valve inserted in the inspiratory circuit of patients submitted to artifical respiration.
mesh_terms: D006801:Humans; D007385:Intermittent Positive-Pressure Ventilation / Q000295:instrumentation*; D011175:Positive-Pressure Respiration / Q000295:instrumentation*; D012131:Respiratory Insufficiency / Q000628:therapy; D013030:Spain