Low-positive pressure ventilation system improves non-hypoxemic apnoea tolerance

Konferenz: BIBE 2018 - International Conference on Biological Information and Biomedical Engineering
06.06.2018 - 08.06.2018 in Shanghai, China

Tagungsband: BIBE 2018

Seiten: 3Sprache: EnglischTyp: PDF

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Li, Kai; Yu, Shanshan; Jiao, Yuan (Anesthesia department, China-Japan Union Hospital of Jilin University, Changchun, Jilin,130033, China)

Objective: To determine pre-oxygenation with PSV increases the duration of non-hypoxemic apnoea in non-obese patients. Method: 50 patients scheduled pan-endoscopy were enrolled to receive either 100% oxygen at neutral pressure (control group) or 100% oxygen with positive-pressure ventilation (a positive inspiratory and end-expiratory pressure of 4 cmH2O, PSV group) during spontaneous ventilation with a face mask. The goal of pre-oxygenation was to obtain an end-tidal oxygen concentration of more than 90% prior to induction of anaesthesia. Results: The mean (inter-quartile range) duration of non-hypoxemic apnoea was longer in the PSV group than control group (P < 0.001). Oxygenation time was shorter in the PSV group than control group (P=0.037). The inter-group difference in the duration of pan-endoscopy was not significant. Tolerance was good or very good in all patients. Conclusion: oxygenation with PSV is associated with a longer duration of non-hypoxemic apnoea and a lower frequency of manual re-ventilation.