Anesthesia and analgesia
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Anesthesia and analgesia · Mar 1993
Randomized Controlled Trial Comparative Study Clinical TrialThe effect of two levels of hypotension on intraoperative blood loss during total hip arthroplasty performed under lumbar epidural anesthesia.
The degree of induced hypotension necessary to achieve a significant reduction in intraoperative blood loss has never been defined. Forty patients undergoing primary total hip arthroplasty during epidural anesthesia by a single surgeon were randomly assigned to have mean arterial pressure maintained at 50 +/- 5 mm Hg or 60 +/- 5 mm Hg throughout surgery. ⋯ No difference in transfusion requirements, postoperative hematocrit, or duration of surgery was noted. A difference in mean arterial blood pressure of 10 mm Hg from 50 to 60 mm Hg during surgery for total hip arthroplasty under epidural anesthesia has a measurable effect on intraoperative blood loss.
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Anesthesia and analgesia · Mar 1993
Randomized Controlled Trial Comparative Study Clinical TrialInduction of anesthesia with sevoflurane, nitrous oxide, and oxygen: a comparison of spontaneous ventilation and vital capacity rapid inhalation induction (VCRII) techniques.
In this study, the vital capacity rapid inhalation induction of anesthesia (VCRII) technique and the conventional spontaneous inhalation induction technique, each using 4.5% sevoflurane in nitrous oxide and oxygen, were compared. The VSRII group (n = 32) and conventional group (n = 32) were each tested on unpremedicated volunteers. ⋯ Each of the two techniques was found acceptable by most of the volunteers studied (more than 80%). However, sevoflurane is best used with the VCRII technique because VCRII resulted in fewer excitement movements that could lead to severe complications and pronounced excitement.