Optimal size selection of laryngeal mask airway in Malaysian female adult population.

Autor:	Rao AS; Department of Anaesthesia and Intensive Care, Kuala Lumpur Hospital, 50586 Kuala Lumpur., Yew AE, Inbasegaran K
Jazyk:	angličtina
Zdroj:	The Medical journal of Malaysia [Med J Malaysia] 2003 Dec; Vol. 58 (5), pp. 717-22.
Abstrakt:	Background: The summary of various studies done looking at size selection of the laryngeal mask airway (LMA) in adults is that, selection based on sex is appropriate, and that both sizes 4 or 5 are adequate for adult females. However, in our local population these sizes may be too large especially the size 5 for adult females. Objective: To determine the optimal size of LMA in Malaysian female adults. Method: 135 ASA 1 or 2 adult female patients coming for elective surgery, requiring general anaesthesia suitable for LMA insertion were randomised into 3 groups to receive either a size 3, 4 or 5 LMA. Optimal size of the LMA was assessed based on 4 parameters, the number of attempts at placement, the oropharyngeal leak pressure (OLP), fibre optic score and the percentage of the vocal cords seen. Results: The 3 groups were demographically similar. There was no difference in the 3 groups in terms of number of attempts of placement, OLP and fibre-optic score. The percentage of vocal cords seen with the size 3 LMA was significantly less than for the size 4 and size 5 (p = 0.009). For the size 5 LMA group in 10/45 patients, the size 5 LMA was too big making it incorrectly positioned after successful insertion and in another 3/45 patients it was difficult to pass the size 5 LMA past the open mouth during insertion. There were no such problems with the size 3 or 4 LMA groups. Conclusion: The optimal size of LMA for the female Malaysian adult is size 4.
Databáze:	MEDLINE
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