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Spinal anesthesia for arthroscopic knee surgery
Author(s) -
Gürkan Y.,
Canatay H.,
Özdamar D.,
Solak M.,
Toker K.
Publication year - 2004
Publication title -
acta anaesthesiologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.738
H-Index - 107
eISSN - 1399-6576
pISSN - 0001-5172
DOI - 10.1111/j.1399-6576.2004.00353.x
Subject(s) - medicine , anesthesia , bupivacaine , fentanyl , saline , morphine , analgesic , urination , surgery , placebo , randomized controlled trial , urinary system , alternative medicine , pathology , endocrinology
Background and objective: The purpose of the study was to compare the effects of adding 50 µg of morphine, 25 µg of fentanyl or saline to 6 mg of hyperbaric bupivacaine on postoperative analgesia and time to urination in patients undergoing arthroscopic knee surgery under spinal anesthesia. Methods: The study was designed in a prospective, randomized, double‐blinded and placebo‐controlled manner. Sixty ASA I–II patients were randomized into the following three groups: Group BM: 6 mg of bupivacaine and 50 µg of morphine, Group BF: 6 mg of bupivacaine and 25 µg of fentanyl, and Group BS: 6 mg of bupivacaine and saline. Selective spinal anesthesia was performed in a lateral decubitus position, with the operative knee dependent for 10 min. Results: In all groups satisfactory anesthesia was provided during the operation. There was a statistically significant difference between all the groups in times to voiding [Group BM 422 ± 161 min; Group BF 244 ± 163 min; Group BS 183 ± 54 min (mean ± SD)]. The incidence of pruritus was significantly greater in Group BM (80%) and BF (65%) in comparison with Group BS (no pruritus) ( P < 0.05). The incidence of nausea was significantly increased in Group BM (35%) in comparison with Group BF (10%) and Group BS ( P < 0.05). Analgesic consumption was significantly greater in Group BS in comparison with Groups BM and BF ( P < 0.01). Conclusions: We conclude that during spinal anesthesia even mini‐dose intrathecal morphine is not acceptable for outpatient surgery due to side‐effects, especially severely prolonged time to urination.