[Optimal dose of fentanyl for postoperative epidural analgesia after thoracic surgery].
BACKGROUND
We investigated the dose of fentanyl in ropivacaine for epidural anesthesia that will provide effective analgesia with minimal side effects after thoracic surgery.


METHODS
Sixty patients scheduled to undergo thoracic surgery were randomly allocated to four groups according to fentanyl dose in epidural analgesia: group R (0 microg x hr(-1); n = 15), group F1 (5 microg x hr(-1); n = 15), group F2 (10 microg x hr(-1); n = 15) and group F3 (15 microg x hr(-1); n = 15). Pain scores (visual analogue scale: VAS) were assessed at 1, 3, 6, 12, 24, and 48 hrs after surgery. Degrees of satisfaction regarding pain relief and complications during a period of 48 hrs after surgery were compared.


RESULTS
Pain scores in group F3 were significantly lower than those in the other groups at 3, 6, and 12 hrs after surgery. The number of postoperative analgesics used in group R was significantly more than the numbers used in other groups. The incidences of side effects were similar in the four groups.


CONCLUSIONS
We conclude that continuous epidural administration of more than 15 microg x hr(-1) of fentanyl in ropivacaine provides pain relief and few side effects after thoracic surgery.
Department of Anesthesiology, Obihiro National Hospital, Obihiro 080-8518.
Akio
A
Yamagishi
Yuichi
Y
Asai
Hiroshi
H
Iwasaki
D000328:Adult; D000368:Aged; D000577:Amides; D015360:Analgesia, Epidural / Q000009:adverse effects / Q000379:methods*; D000701:Analgesics, Opioid / Q000008:administration & dosage* / Q000009:adverse effects; D000779:Anesthetics, Local; D005260:Female; D005283:Fentanyl / Q000008:administration & dosage* / Q000009:adverse effects; D006801:Humans; D008297:Male; D008875:Middle Aged; D010149:Postoperative Pain / Q000517:prevention & control / Q000628:therapy*; D017060:Patient Satisfaction; D000077212:Ropivacaine; D019616:Thoracic Surgical Procedures
D000577:Amides; D000701:Analgesics, Opioid; D000779:Anesthetics, Local; D000077212:Ropivacaine; D005283:Fentanyl