Fig. 1: Illustration of Fisher & Paykel (left) and Seattle-PAP (right) bubble CPAP generators.
From: A trial comparing continuous positive airway pressure (CPAP) devices in preterm infants
The expiratory limb of the circuit is oriented vertically into the water seal of the bubbler apparatus (0°) in Fisher & Paykel, while the expiratory limb of the circuit in Seattle-PAP is maintained at 135°.
