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Standard preoxygenation vs two techniques in children
Author(s) -
CHIRON BRUNO,
MAS CHRISTOPHE,
FERRANDIÈRE MARTINE,
BONNARD CHRISTIAN,
FUSCIARDI JACQUES,
MERCIER COLETTE,
LAFFON MARC
Publication year - 2007
Publication title -
pediatric anesthesia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.704
H-Index - 82
eISSN - 1460-9592
pISSN - 1155-5645
DOI - 10.1111/j.1460-9592.2007.02259.x
Subject(s) - medicine , supine position , anesthesia , tidal volume , breathing , respiratory system
Summary Background: Preoxygenation is recommended in pediatric anesthesia but it has been poorly assessed. Fractional expired oxygen concentration (F ET O 2 ) is a preoxygenation monitor. The aim of this prospective study in children was to compare three techniques of preoxygenation by the measurement of F ET O 2. Methods: Twenty children (6–15 years) were included. F ET O 2 was measured with the child in a supine position, holding the facemask. The F ET O 2 value was measured after 3 min of calm breathing of room air (baseline) and during the three preoxygenation techniques performed in random order: 3 min of tidal volume breathing using an O 2 flow of 9 l·min −1 (TV × 3 min) – four deep breaths within 30 s using an O 2 flow of 15 l·min −1 (4 DB) – eight deep breaths within 1 min using an O 2 flow of 15 l·min −1 (8 DB). Between each technique, at least 5 min breathing room air was allowed to return to baseline F ET O 2 . Fisher’s exact test was used and P < 0.05 was considered significant. Results: Twenty children were studied (age: 11.5 ± 3 years, weight: 42 ± 21 kg). The F ET O 2 ≥ 90% was found to be 79% in 74 ± 40 s with TV × 3 min, 11% with 4 DB, and 68% with 8 DB. Conclusions: In children, Vt × 3 min is the most efficient preoxygenation technique to reach F ET O 2 ≥ 90%.