Current opinion in anaesthesiology
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Curr Opin Anaesthesiol · Dec 2008
ReviewThe measurement of dyshemoglobins and total hemoglobin by pulse oximetry.
Recent advances in pulse oximetry have made it possible to noninvasively measure total hemoglobin, as well as the two most common dyshemoglobins. This review will trace the development and clinical application of multiwavelength pulse oximetry. ⋯ The development of multiwavelength pulse oximeters, which can measure total hemoglobin as well as dyshemoglobins, should result in improved patient care.
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Elimination of flammable anesthetic gases has had little effect on operating-room fires except to change their etiology. Electrocautery and lasers, in an oxygen-enriched environment, can ignite even the most fire-resistant materials, including the patient, and the fire triad possibilities in the operating room are nearly limitless. This review will: identify operating room contents capable of acting as ignition/oxidizer/fuel sources, highlight operating room items that are uniquely potent fire triad contributors, and operating room identify settings where fire risk is enhanced by proximity of triad components in time or space. ⋯ Operating room fires are infrequent but catastrophic. Operating room fire prevention depends on: (a)understanding how fire triad elements interact to create a fire, (b) recognizing how standard operating-room equipment, materials, and supplemental oxygen can become one of those elements, and (c) vigilance for circumstances that bring fire triad elements into close proximity.
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Advances in minimally invasive procedures have resulted in an increased demand for procedural sedation. Patient-controlled sedation (PCS) has been in clinical use for almost 20 years, but has not been reviewed in over 10 years. ⋯ PCS has been applied to a wide variety of procedures, but systems that can be applied 'off-the-shelf' are not easy to tune. New approaches to PCS may address these limitations. Better understanding of the psychology of sedation may lead to better patient acceptance of PCS.
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Curr Opin Anaesthesiol · Dec 2008
ReviewReview of video laryngoscopy and rigid fiberoptic laryngoscopy.
Recent advances in fiberoptic systems and video technology have resulted in the development of new intubation devices and techniques. A defining characteristic of rigid fiberoptic and videolaryngoscopic techniques is that glottic opening is viewed indirectly in place of direct line-of-sight. Various issues common to all instruments in this group are highlighted, and a few recently released tools are described. The aim of this article is to review material published since January 2007. ⋯ As indirect laryngoscopic tools become more available, and clinicians become more facile in their use, the management of (potentially) difficult intubations is likely to change. Further technological advances are likely to lead to the development of even more new instruments.