Evaluating LMA-ProSeal insertion techniques: A call for methodological clarification

In the recent article by Ishio et al. [1] evaluating the insertion efficacy of the LMA-ProSeal by novice doctors with or without a 90° bend created by an intubating stylet in anesthetized patients, they demonstrate that a 90° bend re-figuration facilitates LMA-ProSeal insertion, as shown by a higher successful insertion rate, a higher sealing pressure, and a lower subjective difficulty of insertion. To rightly compare effect of insertion techniques on performance of the studied device in a randomized controlled trial, however, standardization of equipment and rational design of study are crucial.

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