Anesthesia and analgesia
-
Anesthesia and analgesia · Jul 1988
Letter Case ReportsHumidifier malfunction--a cause of anesthesia circuit occlusion.
-
Anesthesia and analgesia · Jul 1988
Randomized Controlled Trial Clinical TrialThe effect of nail polish on pulse oximetry.
A randomized, blind study examined the effect of nail polish color on measurement of oxygen saturation by pulse oximetry. Fourteen adult volunteers had blue, green, purple, black, and red nail polish applied to their finger nails. A strip-chart recording of oxygen saturation (Nellcor N100) was made in room air and later interpreted in a blinded fashion. ⋯ Spectrophotometric absorbance data suggest that other colors may interfere with pulse oximetry. On the basis of spectrophotometric data, brown-red nail polish was predicted to interfere with oximetry; subsequent pulse oximetry measurements confirmed the prediction. Nail polish should be removed routinely before pulse oximetry monitoring.
-
Anesthesia and analgesia · Jul 1988
Effects on gastric emptying of thoracic epidural analgesia with morphine or bupivacaine.
The effects of thoracic epidural analgesia on gastric emptying were evaluated in healthy fasting volunteers. In ten volunteers, 4 mg of epidural morphine were injected at the T4 level, and ten volunteers received thoracic epidural analgesia with 0.5% bupivacaine, the latter causing block of the sympathetic innervation to the stomach. Acetaminophen absorption was used as an indirect measure of the rate of gastric emptying. ⋯ In summary, 4 mg epidural morphine delayed gastric emptying. This was not a systemic effect of morphine. Thoracic epidural analgesia with bupivacaine had no influence on gastric emptying.
-
Anesthesia and analgesia · Jun 1988
Comparative Study Clinical Trial Controlled Clinical TrialComparison of continuous epidural infusion of fentanyl-bupivacaine and morphine-bupivacaine in management of postoperative pain.
The short duration of epidural fentanyl has limited its direct comparison with epidural morphine in previous reports. The following study was performed of continuous postoperative epidural infusions at 5 ml/hr fentanyl 10 micrograms/ml (n = 59) or morphine 0.1 mg/ml (n = 48), both with bupivacaine 0.1%, in patients having cesarean sections. Postoperative evaluations included the frequency and magnitude of clinically evident respiratory depression, the adequacy of analgesia, nausea, pruritus, the ability to ambulate, and other side effects for 24 hours. ⋯ No patient developed respiratory depression in either group. Patient and staff acceptance of the continuous epidural technique was excellent because there were only minor catheter-related problems associated with its use. It is concluded that continuous epidural fentanyl combined with bupivacaine offers excellent postoperative analgesia with minimal side effects.