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The effect of nitrous oxide diffusion on laryngeal mask airway cuff inflation in children
Author(s) -
ALGREN JOHN,
GURSOY FERAY,
JOHNSON T.,
SKJONSBY BARBARA
Publication year - 1998
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 - 10.1046/j.1460-9592.1998.00696.x
Subject(s) - medicine , cuff , anesthesia , nitrous oxide , leak , laryngeal mask airway , airway , surgery , environmental engineering , engineering
We studied the effect of nitrous oxide (N 2 O) diffusion on size 2 LMA cuff inflation in 52 children, 38±21 months of age. LMA cuffs were inflated with air (Group A) or 65% N 2 O, oxygen and halothane (Group B). Cuffs were inflated in a stepwise manner, achieving a cuff leak pressure of 17±4 cm H 2 O for all patients. Cuff volume and intracuff pressure increased in Group A (8.5±1.0 ml to 10.8±1.4 ml and 101±36 mmHg to 152±42 mmHg, respectively) and decreased in Group B (8.9±1.0 ml to 6.6±1.5 ml and 90±30 mmHg to 53±37 mmHg, respectively). Cuff leak pressure did not change significantly in either group. We conclude that cuff inflation with a mixture of N 2 O/oxygen prevents N 2 O diffusion into the cuff, avoiding cuff overinflation without compromising LMA function.