An adaptor has been devised which, when fitted between the handle and the blade of a standard Macintosh design laryngoscope, allows the angle to be adjusted to several clinically useful positions. An appropriate angle can be easily found either for introduction of the blade, laryngoscopy or exploration of the pharynx through a simple mechanism operated by the hand holding the laryngoscope.
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Dhara et al. (1991) studied this question.
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