Journal of clinical anesthesia
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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.
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To determine the cause and timing of case cancellation in a pediatric outpatient surgical population, and to examine the economic and emotional impact of such cancellations on patients and their families. ⋯ This study suggests that last-minute cancellation of surgery has an important impact on patients and their families and suggests a need to review present protocols for screening patients prior to surgery.
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Randomized Controlled Trial Multicenter Study Comparative Study Clinical Trial
Outpatient general anesthesia: a comparison of a combination of midazolam plus propofol and propofol alone.
To compare the hemodynamics, efficacy, safety, and postoperative recovery of patients following the use of either midazolam plus propofol or placebo plus propofol for induction and maintenance of general anesthesia for outpatient surgical procedures of less than two hours' duration. ⋯ Concomitantly administered midazolam and reduction-concentration propofol did not exacerbate the well-described hypotensive effects of full-strength propofol during induction of anesthesia. The time to intubation was equivalent with the combination of midazolam/propofol as compared with propofol alone. Recovery from the two regimens was not significantly different. However, reduced recall of perioperative events was observed more often in the midazolam/propofol regimen compared with propofol alone.