1. Minimum local anaesthetic dose (MLAD) of intrathecal levobupivacaine and ropivacaine for Caesarean section
- Author
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D. Celleno, A. Lemma, M. G. Frigo, Giulia Barbati, R. Parpaglioni, Sebastiani M, R., Parpaglioni, M. G., Frigo, A., Lemma, M., Sebastiani, Barbati, Giulia, and D., Celleno
- Subjects
chemically induced, Intraoperative Complications, Pain Measurement, Pregnancy ,medicine.medical_treatment ,Intrathecal ,methods, Anesthesia ,Pregnancy ,Ropivacaine ,Anesthesia ,Anesthetics, Local ,Intraoperative Complications ,Levobupivacaine ,Pain Measurement ,Skin incision ,Local anesthetic ,Drug, Epidemiologic Methods, Female, Humans, Hypotension ,Bupivacaine ,Local ,Adult, Amide ,Epidural ,chemically induced ,Female ,administration /&/ dosage/adverse effects, Bupivacaine ,Drug ,Hypotension ,medicine.drug ,administration /&/ dosage/adverse effects/analogs /&/ derivatives, Cesarean Section, Dose-Response Relationship ,Anesthesia, Epidural ,Adult ,medicine.medical_specialty ,administration /&/ dosage/adverse effects, Anesthesia ,Spinal ,medicine.drug_class ,Adult, Amides ,Obstetrical ,methods, Anesthetics ,administration /&/ dosage/adverse effects ,Anesthesia, Spinal ,methods ,Dose-Response Relationship ,methods, Anesthetic ,administration /&/ dosage/adverse effects/analogs /&/ derivatives ,medicine ,Anesthesia, Obstetrical ,Humans ,Caesarean section ,Anesthetics ,Local anaesthetic ,Dose-Response Relationship, Drug ,business.industry ,Cesarean Section ,Amides ,Surgery ,Anesthesiology and Pain Medicine ,business ,Epidemiologic Methods ,Test solution - Abstract
We determined the minimum local anaesthetic dose (MLAD) of spinal levobupivacaine and ropivacaine for Caesarean section. Ninety women were randomly allocated to two groups and received 3 ml of study solution by a combined spinal/epidural technique. The initial dose was 12 mg for levobupivacaine and 17 mg for ropivacaine groups. To be considered effective, a test solution had to achieve a visual analogue pain score (VAPS) of 30 mm or less at skin incision, uterine incision, birth, peritoneal closure, and at the end of surgery. Effective or ineffective responses determined, respectively, a 0.3 mg decrease or increase of the same drug for the next patient in the same group, using up-down sequential allocation. The MLAD of levobupivacaine was 10.58 mg (CI 95\%: 10.08-11.09) and the MLAD of ropivacaine 14.22 mg (CI 95\%: 13.67-14.77), using the Dixon and Massey formula. The potency ratio between spinal levobupivacaine and spinal ropivacaine was 1.34.
- Published
- 2006