• Ji Su Jang, Sung Mi Hwang, Youngsuk Kwon, Hyunjin Tark, Young Joon Kim, Byoung Yoon Ryu, and Jae Jun Lee.
• Department of Anesthesiology and Pain medicine, Hallym University Chuncheon Sacred Heart Hospital.
• Medicine (Baltimore). 2018 Dec 1; 97 (51): e13768.

BackgroupdThis study investigated the plasma fentanyl concentration and efficacy of transdermal fentanyl patch (TFP) (25 μg/h) in the management of acute postoperative pain.MethodsPatients undergoing laparoscopic cholecystectomy were randomly allocated to 2 groups. The TFP group (n = 30) received a single TFP 25 μg/ h to the anterior chest wall 14 h before operation. The IV group (n = 30) received a placebo patch. After the operation, intravenous fentanyl infusion (25 μg/h) was begun with loading dose 25 μg in the IV group and only normal saline in the TFP group. Plasma fentanyl levels were measured at admission, 1, 6, 12, 24, and 48 h postoperatively. Pain severity and adverse effects were evaluated too.ResultsThe fentanyl level peaked 1 h after operation in the TFP group (3.27 ± 0.34 ng/mL) and 24 h postoperatively in the IV group (2.9 ± 0.42 ng/mL). Pain scores and the use of rescue analgesics were not significantly different between 2 groups. Respiratory depression was not happened in both groups.ConclusionsThe TFP (25 μg/h) affixed 14 h before surgery reached a higher constant concentration than the same dose setting of a constant IV infusion of fentanyl after surgery. Although the concentration of fentanyl was higher than those of previous researches, there was no respiratory depression. But, there was no advantage of reducing pain score and the use of rescue analgesics.Clinical Trial Registration(available at: http://cris.nih.go.kr, KCT0002221).

26 keywords...

hide…