Abstract:
:To determine work-of breathing with continuous positive airway pressure (CPAP) delivery systems, we used a lung model to simulate spontaneous breathing. "Additional work" during tidal breathing was derived by comparing change in airway pressure with change in tidal volume. Seven demand-flow CPAP delivery systems were compared with one continuous-flow, 5-L reservoir-bag system (flow of 60 L/min to maintain positive airway pressure). It was concluded that demand-flow CPAP delivery systems vary widely in the amount of additional work required of a patient. When a lung model is used, some demand-flow systems perform as well as, or better than, a continuous-flow reservoir-bag system.
journal_name
Chestjournal_title
Chestauthors
Katz JA,Kraemer RW,Gjerde GEdoi
10.1378/chest.88.4.519subject
Has Abstractpub_date
1985-10-01 00:00:00pages
519-26issue
4eissn
0012-3692issn
1931-3543pii
S0012-3692(15)34233-1journal_volume
88pub_type
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