British Journal of Anaesthesia, Vol 82, Issue 5 712-714, Copyright © 1999 by The Board of Management and Trustees of the British Journal of Anaesthesia
T. Asai, A. U. Wagle and M. Stacey
We have compared in 25 patients ease of placement of the conventional and
intubating laryngeal masks while the patient's head and neck were
stabilized by a manual in-line method, in a randomized, crossover study.
After induction of anaesthesia and neuromuscular block, the masks were
placed in turn. Adequacy of ventilation and ease of placement (using a
10-cm visual analogue scale (VAS)) were assessed; time for placement
between removal of the face mask and connection of the laryngeal mask to
the breathing system was measured. Adequate ventilation was always obtained
after placement of the intubating laryngeal mask, whereas ventilation was
adequate in 22 of 25 patients after placement of the conventional laryngeal
mask. Placement of the intubating laryngeal mask was significantly easier
(P < 0.001; 95% confidence intervals (CI) for median difference 8-31 mm
in VAS) and faster (P << 0.001; 95% CI for mean difference 3.2-6.2 s)
than that of the conventional mask.
CLINICAL INVESTIGATIONS
Placement of the intubating laryngeal mask is easier than the laryngeal mask during manual in-line neck stabilization
Department of Anaesthesiology, Kansai Medical University, 10-15 Fumizono-cho, Moriguichi City, Osaka, 570-8507, Japan; Department of Anaesthetics, East Glamorgan General Hospital, Church Village, Mid Glamorgan CF38 1AB, UK; Department of Anaesthetics and Intensive Care Medicine, Llandough Hospital NHS Trust, Penlan Road, Penarth CF64 2XX, UK
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