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  • Title: Single breath vital capacity induction of anesthesia with 8% sevoflurane versus intravenous propofol for laryngeal tube insertion in adults.
    Author: El-Radaideh KM, Al-Ghazo MA.
    Journal: Saudi Med J; 2007 Jan; 28(1):36-40. PubMed ID: 17206286.
    Abstract:
    OBJECTIVE: To compare the conditions for laryngeal tube airway insertion obtained by the inhalation of 8% sevoflurane using a vital capacity breath (VCB) technique with propofol intravenous induction. METHODS: We carried out a prospective, randomized, single blind study at King Abdullah University Hospital, Irbid, Jordan from September 2005 to April 2006. Involved in this study were 80 adult (ASA physical status I and II) patients aged 26-70 years undergoing elective surgery under general anesthesia. The patients were randomized into 2 groups. An independent observer noted the time to loss of consciousness, the presence of adverse events, time to successful laryngeal tube placement and the number of attempts needed until a successful laryngeal tube insertion. RESULTS: With the single VCB method, sevoflurane produced a loss of consciousness faster than propofol did (51.6 +/- 4.4 versus 59.7 +/- 4.9 seconds, p<0.001). The insertion of laryngeal tube was faster in the propofol group (77.2 +/- 20.2 versus 122.2 +/- 33.3 seconds, p<0.001) and required fewer attempts (1.2 +/- 0.4 versus 1.6 +/- 0.7, p<0.02). The overall incidence of complications during the induction of anesthesia as well as during the laryngeal tube insertion, especially apnea (42% versus 0%; p<0.001), was more frequent in the propofol group (82.5% versus 27.5%; p<0.001). CONCLUSION: We conclude that vital capacity breath induction with sevoflurane produces a faster loss of consciousness and fewer side effects than propofol and efficient for laryngeal tube insertion, but takes slightly longer than propofol due to the prolonged jaw tightness.
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