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Neuroanesthesia
Anesthesia and Pain Medicine 2009;4(2):142-145.
Published online April 30, 2009.
Effect of scalp nerve blocks on post-craniotomy pain in the patients undergoing craniotomy
Eun Mi Choi, Seung Ho Choi, Na Hyung Lee, Kyeong Tae Min
1Department of Anesthesiology and Pain Medicine, Kangwon University College of Medicine, Chuncheon, Korea .
2Department of Anesthesiology and Pain Medicine, Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Korea. ktmin501@yuhs.ac
Abstract
BACKGROUND
Sympathetic stimulation associated with post-craniotomy pain might subsequently increase blood pressure resulting in postoperative complications. We studied whether scalp nerve blocks would reduce the severity of postoperative pain.
METHODS
Thirty-two patients undergoing craniotomy were randomly allocated to either the ropivacaine group (n = 16) or the saline group (n = 16). After the skin closure, we carried out scalp nerve blocks with ropivacaine (0.75%) or saline (0.9%). Visual analog scale scores (VAS), mean arterial pressure, and heart rate were measured at 0.5, 1, 2, 4, 6, 12, 24, and 48 h after extubation. Tramadol 50 mg iv was used as rescue analgesic. The delay before administration of the first analgesic and cumulative dose of rescue analgesic for the first 48 h postoperatively were measured.
RESULTS
The ropivacaine group had lower analgesic requirements than the saline group (P = 0.008). The delay before administration of the first analgesic was not different significantly between two groups. VAS was similar between the two groups at each time interval. Postoperative MAP and HR were not significantly different between two groups. VAS did not correlate with these hemodynamic variables.
CONCLUSIONS
Although scalp nerve blocks with ropivacaine reduced the analgesic requirement, they did not provide the sufficient pain relief.
Key Words: post-craniotomy pain, ropivacaine, scalp nerve block


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