CAPNOTRACKING OF CARDIAC OUTPUT OR EFFECTIVE PULMONARY BLOOD FLOOW DURING MECHANICAL VENTILATION

摘要

The present disclosure relates to a capnotracking method for continuous determination of cardiac output or EPBF of a mechanically ventilated subject (3), comprising the steps of measuring (S1) expiratory CO2 of the subject and determining (S2) a first value of cardiac output or EPBF of the subject at a first point in time. The method further comprises the steps of controlling (S3) the mechanical ventilation of the subject to keep a level of venous CO2 of the subject substantially constant between the first point in time and a second point in time, determining (S4) from the expiratory CO2 measurements a change in alveolar CO2 of the subject between the first and second points in time, and determining (S5) a second and updated value of cardiac output or EPBF of the subject based on the first value and the change in alveolar CO2 .