Editor—I read with interest the recent correspondence article on the use of nebulized magnesium in the prevention of postoperative sore throat (POST).1 The study randomized 40 adult patients, ASA I or II, of either sex, undergoing elective may be a contributing factor to the result in this study? Similarly, the type of analgesia used for laparoscopic surgery could also be open to review, with the use of epidurals, again extrapolated from open surgery, being shown to prolong the hospital length of stay in this group.3 Could this also have a bearing on the results, although in this case, thoracic epidural analgesia (TEA) was used in both arms of this section of the trial? As with many good studies, this raises more questions than it directly answers. Among these questions must be the appropriateness of extrapolating the results of studies in anaesthesia for open colorectal surgery to laparoscopic colo-rectal surgery without direct evidence of a benefit in the later group.
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