Journal of clinical anesthesia
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Comparative Study
Effects of gas flow management on postintubation end-tidal anesthetic concentration and operating room pollution.
To study how different anesthetic practices during the transition from anesthetic delivery by mask to endotracheal intubation affect end-tidal postintubation anesthetic concentration and operating room (OR) pollution. ⋯ In a mechanical model of anesthetic induction, turning the gas flows off before "intubation" and leaving the vaporizer on (the gas off practice) maintained "postintubation" end-tidal drug concentrations close to "preintubation" equilibrium and minimized OR pollution.
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Randomized Controlled Trial Comparative Study Clinical Trial
Pulse oximeter performance during desaturation and resaturation: a comparison of seven models.
To compare pulse oximeter performance during induced hypoxemia. ⋯ Most models of oximeters tested performed well when hemoglobin oxygen saturation was high, but all were inaccurate when SaO2 was approximately 75%. During induced hypoxemia, there were significant differences in the response times of oximeters tested, with no model demonstrably superior to others in all measures of performance.
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Randomized Controlled Trial Comparative Study Clinical Trial
Effects of motion, ambient light, and hypoperfusion on pulse oximeter function.
To compare the performance of five pulse oximeters during hypoperfusion, probe motion, and exposure to ambient light interference. ⋯ There are significant differences in the accuracy of commercially available pulse oximeters during nonideal circumstances, with failure rates varying from approximately 5% to 50% depending on the oximeter and source of interference. Furthermore, no single oximeter performed the best under all conditions.
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To determine the volume of air in 1000-ml crystalloid bags before and after connection to an infusion set; and to determine the volume of air that is not eliminated by the air eliminator in the Level 1 fluid warming device (Level 1 Technologies, Inc., Rockland, MA) when air boluses of different volumes enter into the fluid warming set. ⋯ Air must be rigorously eliminated from all fluid containers because of the limited air elimination capability of the Level 1 air eliminator.
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Thrombelastography (TEG), which evaluates the elastic properties of whole blood and provides a global assessment of hemostatic function, is useful in managing peripartum coagulopathy. A case of severe bleeding after vaginal delivery, in which TEG was used successfully to manage hemostatic defects, is presented.