Anesthesia and analgesia
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Anesthesia and analgesia · Oct 1993
ReviewCocaine abuse in the parturient and effects on the fetus and neonate.
The growing use of cocaine among pregnant women and women of childbearing age has become an issue of great concern to physicians. Cocaine abuse among parturients is associated with multi-target organ involvement, including the cardiovascular, respiratory, neurologic, and hematologic systems. ⋯ Although a history of premature rupture of membranes, smoking, alcohol use, syphilis serology, and use of other illicit drugs suggests cocaine abuse, the single most important predictor is the absence of prenatal care. The intraoperative anesthetic management should take into consideration the different effects of cocaine on the mother, the fetus, and the neonate.
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Anesthesia and analgesia · Oct 1993
Randomized Controlled Trial Comparative Study Clinical TrialA comparative study of analgesia after knee surgery with intraarticular bupivacaine, intraarticular morphine, and lumbar plexus block.
Following arthroscopic surgery of the knee, 60 ASA I-II patients were randomly allocated to three different groups (n = 20 each) in an attempt to establish the best postoperative analgesic protocol: 20 ml of bupivacaine (0.25%; 50 mg) intra-articularly (IA) (Group 1); continuous three-in-one lumbar plexus block using a catheter to administer 0.25 ml/kg of bupivacaine (0.25%; single-shot) plus continuous pump infusion of the same drug (0.03 ml.kg-1 x h-1 of 0.25% bupivacaine for 24 h) (Group 2); or 1 mg of morphine with 20 ml of saline IA (Group 3). The results were appraised in a double-blind manner, and the degree of postoperative pain was evaluated by visual analog scale (VAS) at constant hourly intervals for the first 24 h, by the incidence of secondary effects, and by the need for complementary analgesia. Group 2 (three-in-one) VAS values were lower 16 and 24 h after surgery and also globally (P < 0.05), with respect to the other two groups. ⋯ No other secondary effects were observed. We conclude that all three analgesic methods proved efficient, as reflected by the scant requirements for additional analgesics and the degree of expressed patient satisfaction. However, lumbar plexus block (three-in-one) with continuous bupivacaine infusion was most effective, and, although it constitutes an added technique, its scant complications and easy performance make its use advisable.
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Anesthesia and analgesia · Oct 1993
Multicenter Study Clinical TrialAdverse events in a multicenter phase IV study of propofol: evaluation by anesthesiologists and postanesthesia care unit nurses.
Phase II and III studies are tightly controlled trials investigating adverse effects before government approval of a new drug. However, because postapproval Phase IV studies involve a much larger and more complex population, the true nature of adverse effects can be seen. We analyzed Phase IV data for the new drug propofol with regard to the incidence of adverse events, and evaluations of such events by anesthesiologists versus postanesthesia care unit (PACU) nurses. ⋯ The PACU nurse was more influenced by nausea, vomiting, or postoperative pain; and the anesthesiologist was more influenced by postoperative confusion or delayed emergence from anesthesia. For only 0.6% of patients did both evaluators rate recovery as poor. Anesthesiologists gave more weight to intraoperative adverse events, and nurses to postoperative events.(ABSTRACT TRUNCATED AT 250 WORDS)
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Anesthesia and analgesia · Oct 1993
Comparative StudyComparison of bedside coagulation monitoring tests with standard laboratory tests in patients after cardiac surgery.
We compared portable bedside tests of whole blood coagulation with standard laboratory plasma coagulation tests to assess the accuracy and precision of the bedside tests in a clinical setting (postcardiac surgery). The Ciba Corning 512 Coagulation Monitor (Ciba Corning Diagnostics Corp., Medfield, MA) and the Hemochron 801 (International Technidyne Corp., Edison, NJ) were tested. One hundred forty-one patients who underwent cardiac surgery requiring cardiopulmonary bypass were evaluated upon arrival in the intensive care unit. ⋯ The difference between Hemochron TT and Hemochron HNTT correlated weakly, but significantly, with laboratory aPTT ratio (r = 0.52, P < 0.001). The slope of the regression line indicated that a TT-HNTT difference > 30 s correlated with an aPTT > 1.5 x control. We conclude that, in the postoperative cardiac surgical patient, PT was both accurate and precise in two commercially available tests, but aPTT was not.(ABSTRACT TRUNCATED AT 250 WORDS)
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Anesthesia and analgesia · Oct 1993
Clinical pharmacology of mivacurium in pediatric patients less than off years old during nitrous oxide-halothane anesthesia.
We determined the dose-response relationship of mivacurium in infants 2-6 and 7-11 mo of age during nitrous oxide-halothane anesthesia. The neuromuscular and cardiovascular effects of a bolus dose of mivacurium larger than the ED95 in infants and young children from 2-23 mo of age were observed. The infusion rate of mivacurium required to maintain approximately 95% neuromuscular block was determined. ⋯ The time to onset of maximum block was 1.6 +/- 0.3 (0.7-2.7) (mean, SEM [range]) min, and time to recovery to 25% of T1 (T25) was 7.5 +/- 0.7 (5.5-11) min after 150 micrograms/kg in these patients. A bolus dose of 200 micrograms/kg mivacurium in infants and young children (7-23 mo) produced 100% depression of T1 in 14 of 17 patients, 97% depression in 2, and 90% depression in 1. The time to onset of maximum block was 1.5 +/- 0.1 (0.8-3) min and T25 was 10.3 +/- 1.5 (4.8-30.5) min after 200 micrograms/kg in these patients.(ABSTRACT TRUNCATED AT 250 WORDS)