Components for breathing circuits

摘要

A breathing circuit component (4) includes an inlet, an outlet and an enclosing wall (1). The enclosing wall (1) defines a gases passageway between the inlet and the outlet. At least a region (2,3) of the enclosing wall is formed from a breathable material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases. The breathing circuit component may be the expiratory limb of a breathing circuit.