A new pediatric circle valve.
D001698:Biomedical Engineering; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007234:Infant, Premature; D007442:Intubation, Intratracheal; D010372:Pediatrics; D012122:Ventilators, Mechanical / Q000295:instrumentation*