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Korean J Anesthesiol > Volume 51(3); 2006 > Article
Korean Journal of Anesthesiology 2006;51(3):318-323.
DOI: https://doi.org/10.4097/kjae.2006.51.3.318   
The Effect of Target Controlled Infusion of Remifentanil during Video Assisted Thoracoscopic Surgery under Epidural Anesthesia.
Do Won Lee, Tae Kyun Kim, Seung Hoon Baek, Sang Wook Shin, Seong Wan Baik, Jae Young Kwon
Department of Anesthesiology and Pain Medicine, Pusan National University College of Medicine, Busan, Korea. jykwon@pusan.ac.kr
Abstract
BACKGROUND
Video assisted thoracoscopic surgery (VATS) can be performed under epidural anesthesia. However, epidural anesthesia dose not provide complete analgesia during VATS. In that case, remifentanil may provide adjuvant analgesia. The aim of this study was to find safe and effective target concentration of remifentanil during VATS under epidural anesthesia.
METHODS
Patients were randomly allocated to target concentration of remifentanil 1 or 2 microgram/ml (Group N1 or N2). Thoracic epidural catheter was inserted at T(6-7) or T(7-8) and 0.75% ropivacaine 6 ml was administered. Patients were positioned in lateral position and remifentanil infusion was started. If patients complained of pain, target concentration of remifentanil was elevated by 0.5 microgram/ml. Hemodynamic and respiratory variables were checked during anesthesia. The degree of sedation was evaluated with Ramsey sedation scale and modified Steward recovery scale was used to evaluate recovery.
RESULTS
There was no significant difference between 2 groups in hemodynamic and respiratory variables. N2 group showed more sedation on skin incision (P < 0.05). The incidence of pain complaint in N1 group was higher than those of N2 group (P < 0.05). There was no significant difference in the incidence of side effects and ephedrine administration.
CONCLUSIONS
Remifentanil target concentration of 2 ng/ml is more effective than 1 ng/ml to reduce pain without significant side effects during VATS under thoracic epidural anesthesia.
Key Words: epidural anesthesia; remifentanil; target controlled infusion; video assisted thoracoscopic surgery


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