Journal article

Efficacy of a heated passover humidifier during noninvasive ventilation: A bench study

Anne E Holland, Linda Denehy, Catherine A Buchan, John W Wilson

RESPIRATORY CARE | DAEDALUS ENTERPRISES INC | Published : 2007

Abstract

BACKGROUND: Noninvasive positive-pressure ventilation (NPPV) delivers air at a high flow, which is associated with airway mucosal drying and impaired airway functioning. OBJECTIVES: To examine the effects of mechanical ventilation parameters on relative humidity and absolute humidity during NPPV, and to evaluate the effect of a heated passover humidifier on relative humidity, absolute humidity, and ventilator performance during NPPV. METHODS: We performed a bench study to assess the effects of inspiratory positive airway pressure (IPAP) of 10 cm H(2)O, 15 cm H(2)O, and 20 cm H(2)O, respiratory rates of 12 breaths/min and 24 breaths/min, and inspiratory-expiratory ratios of 1:2 and 1:3 on rel..

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University of Melbourne Researchers