BREATHING CIRCUITS TO FACILITATE THE MEASUREMENT OF CARDIAC OUTPUT DURING CONTROLLED AND SPONTANEOUS VENTILATION

摘要

A breathing circuit for use with a first gas set (FGS) and a second gas set (SGS), said circuit comprising means for keeping separate the FGS and SGS, a nd a means for sequentially delivering to a patient, first the FGS, and, on inspiration, when the patient inspires so as to deplete the supply of FGS in to the circuit, subsequently delivers substantially SGS for the balance of inspiration.