This circuit is a flexible, single-patient-use, one-way valving system designed for pulmonary function measurements, such as tidal or minute volume, vital capacity and negative inspiratory force. Circuit comes with a U/Adapt-IT™ adapter with 15mm I.D. base, 6" flextube, two one-way valves, an oxygen tube connector, a 22mm O.D. tube adapter and a 22mm I.D./15mm I.D. adapter.
