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Preoxygenation can rapidly improve oxygenation and enhance the security of endotracheal intubation, so it is very essential before endotracheal intubation. The conventional preoxygenation method self-inflating bag (SIB) is not very effective in case of emergency. So our study aims to find a more effective method of preoxygenation in a critical situation.  We retrospectively analyzed data of 105 patients in this study. A total of 49 patients with preoxygenation with invasive ventilator in volume control mode (VCM) and 56 patients with preoxygenation with SIB were included. No significant differences were detected in the baseline data of the 2 groups ( P  > 0.05). Time of preoxygenation (95%) was 174 (168–180) seconds in group VCM and 205 (199–212) seconds in group SIB ( P  < 0.05), and multifactor linear regression showed that its main risk factors were the methods of preoxygenation and PO 2  before preoxygenation ( P  < 0.05). Immediate SPO 2  after preoxygenation was 91 (89–92)% in group VCM and 85 (83–86)% in group SIB ( P  < 0.05). Total time of preoxygenation and intubation was 266 (252–280) seconds in group VCM and 318 (298–338) seconds in group SIB ( P  < 0.05). The 24-hour and overall survival rate in group SIB were lower than in group VCM ( P  > 0.05). Cox regression showed that SaO 2  at 5 minutes after intubation was the major risk factor for the survival rate.  Invasive ventilator with volume control mode can shorten the time of preoxygenation and improve the quality of preoxygenation in patients with emergency intubation and may be a better method of preoxygenation in a critical situation.

medicine

Preoxygenation using invasive ventilator in volume control mode in patients with emergency intubation can shorten the time of preoxygenation and improve the quality of preoxygenation