Controlled ventilation with the Mapleson D system A theoretical and experimental study.
A theoretical analysis has been performed to show the interrelationships between alveolar carbon dioxide concentration, carbon dioxide output, alveolar ventilation and fresh gas flow during controlled ventilation with the Mapleson D system. The model and forms of equation used have been substantiated by experiments in which dogs were ventilated through a coaxial version of the Mapleson D system at varying levels of fresh gas flow and alveolar ventilation. By assuming that man ventilated with this system behaves as does the dog, a nomogram has been produced to predict alveolar carbon dioxide concentrations at any levels of fresh gas flow and minute volume.
D000769:Anesthesia, Inhalation / Q000295:instrumentation / Q000379:methods*; D000818:Animals; D002245:Carbon Dioxide / Q000032:analysis; D004285:Dogs; D006801:Humans; D008433:Mathematics; D011650:Pulmonary Alveoli / Q000032:analysis; D012123:Pulmonary Ventilation; D012121:Respiration, Artificial
D002245:Carbon Dioxide