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Beneficial effects of bilevel positive airway pressure after surgery under cardiopulmonary bypass

Division of Cardiovascular Surgery, Kasugai Municipal Hospital, 1-1-1 Takagi-cho, Kasugai City, 486-8510 Japan

^* Corresponding author. Tel.: +81-568-57-0057; fax: +81-568-57-0067
cvs{at}hospital.kasugai.aichi.jp

To support injured lungs, we have been applying bilevel positive airway pressure for adult patients undergoing surgery with cardiopulmonary bypass. Among 120 consecutive patients, 31 patients whose PaO₂/FiO₂ decreased to less than 180 after extubation assigned to the intermittent 15min bilevel positive airway pressure (7.3±3.6 times per patient). Bilevel positive airway pressure improved oxygenation (PaO₂/FiO₂: 128±43 vs. 198±62, ) and allowed the patients with poor oxygenation after extubation to maintain PaO₂/FiO₂ levels similar to those of the patients without bilevel positive airway pressure. In conclusion, the bilevel positive airway pressure therapy after extubation was effective to improve lung oxygenation non-invasively in adult patients undergoing more invasive surgery with prolonged cardiopulmonary bypass.

Key Words: Cardiopulmonary bypass; Bilevel positive airway pressure; Oxygenation; Postoperative management; Ventilatory support