Comparison of Motor Block of 1.0% Ropivacaine and 0.5% Bupivacaine in Epidural Anesthesia for Hip Arthroplasty Surgery.
10.4097/kjae.2002.42.4.461
- Author:
Kyung Hoon KIM
1
;
Tae Hong KIM
;
Chul Hong KIM
;
Jae Young KWON
;
Kuen Tak SUH
;
Kyoo Sub CHUNG
Author Information
1. Department of Anesthesiology, College of Medicine, Pusan National University, Busan, Korea. dolgo@chollian.net
- Publication Type:Randomized Controlled Trial ; Original Article
- Keywords:
Bupivacaine;
epidural anesthesia;
hip arthroplasty;
ropivacaine
- MeSH:
Anesthesia, Epidural*;
Arthroplasty*;
Bupivacaine*;
Hip*;
Humans;
Injections, Epidural;
Lower Extremity;
Muscle Relaxation;
Orthopedics;
Weights and Measures
- From:Korean Journal of Anesthesiology
2002;42(4):461-465
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
BACKGROUND: The purpose of this study was to compare the onset time, degree and duration of motor block, and the satisfaction of surgeons of given single epidural injections of 1.0% ropivacaine and 0.5% bupivacaine in patients undergoing hip arthroplasty surgery. METHODS: In a double-blind randomized study involving 20 patients, patients randomly received 12 ml of 1.0% ropivacaine or 0.5% bupivacaine at the L2 - 3 or L3 - 4 interspace. Parameters measured were the onset time, duration and degree of motor block, and the satisfaction of the surgeons. RESULTS: Mean onset time of Bromage scale 2 was significantly slower with 1% ropivacaine (14.6 +/- 1.3 min) than with 0.5% bupivacaine (15.7 +/- 2.0 min). However, each frequency of motor blockade (Bromage scale 1, 2 and 3) with 1.0% ropivacaine (10, 8 and 7) was greater than that seen with 0.5% bupivacaine (7, 6 and 1). For scales 1 and 2, 1.0% ropivacaine had a significantly longer duration than 0.5% bupivacaine and the overall duration of motor blockade with 1.0% ropivacaine was longer than 0.5% bupivacaine. Motor block was in 80% achieved satisfactorily of the ropivacaine group and 60% of the bupivacaine group by the surgeons. CONCLUSIONS: In conclusion this study demonstrated that 1.0% ropivacaine provides a more rapid onset time, greater degree and longer duration of motor block without unacceptable side effects than 0.5% bupivacaine for hip arthroplasty surgery. From these results, it may suggest that 1.0% ropivacaine may be useful for lower extremity orthopedic surgery requiring good muscle relaxation.
