SYSTEM FOR PROVIDING SUPPORT THERAPY WHILE DETERMINING CONCENTRATIONS OF A MOLECULAR GASEOUS EXPIRED BY A SUBJECT RECEIVING PRESSURE SUPPORT THERAPY

摘要

Pressure support therapy is provided to a subject. The effectiveness of the provided pressure support therapy is determined and/or the therapy is titrated based on determinations of the concentration of one or more gaseous molecular species in gas exhaled by the subject. The determinations of composition of gas exhaled by the subject are obtained from samples with relatively little distortion caused by dilution of expired gases from gases provided to the airway of the subject as part of the pressure support therapy.