HEAT AND MOISTURE EXCHANGER FOR PATIENT BREATHING

摘要

A heat and moisture exchanger, configured to be located between a respiratory system of a patient and an anesthesia circuit connected to an anesthesia apparatus, or a respiratory circuit connected to a respirator for maintaining a temperature and humidity of an aspired gas required to a patient under anesthesia or artificial respiration, comprises a thermal storage unit, and a heat and humidity regenerating material added to the thermal storage unit. At least one of density, number of cells of the thermal storage unit, and an added amount of the heat and humidity regenerating material in the thermal storage unit is set to decrease from the patient side to the side of the anesthesia apparatus or the respirator along a flow direction of a respiratory gas in the thermal storage unit.