Maske für den Kehlkopf mit einem integrierten Reflexionsoximeter

摘要

A reflectance oximeter (30,34) is mounted to the proximal side of a laryngeal mask (10') to face the posterior wall of the pharynx when the laryngeal mask has been positioned to perform its function of sealed, exclusive airway communication with the laryngeal inlet. Thus positioned, radiation from the oximeter can utilise local back-bone features as a reflector, for two-way passage of the radiation through tissue which characterises the posterior wall of the pharynx. Moreover, the oximeter-observation region is within the body, so that there is no degrading ambient light and changes in oxygen saturation will be detected earlier than by use of any peripherally placed oximeter probe.