Comparison of 0.75% spinal ropivacaine with 0.5% spinal ropivacaine for orthopedic surgery of lower limbs [Comparación entre ropivacaína intratecal al 0.75% con bupivacaína intratecal al 0.5% en cirugía ortopédica de extremidades inferi
Por:
Silva Ortíz H.C., Opalin Guzmán L., Silva Jiménez A., Castillo Becerril G., Tenorio Marañón R., Martínez Segura R.T.
Publicada:
1 ene 2002
Resumen:
The main target for this study was to compare transanesthetic and postoperatory effects of the ropivacain 0.75% intratecal only one dose in relation to the bupivacaine 0.5% on operated patients of lower extremities orthopedic surgery. Material and Methods: With a previous authorization of the Hospital Ethic Committee, 128 patient of different adults ages. ASA I-IV, were studied and divided randomized into two groups: Group I ropivacaine 0.75% (3ml) and Group II bupivacaine 0.5% (3ml)subjected to regional intratecal anesthesia. It was compared the quality of the sensitive block and the motor block as we as the time of recovery of the motor block. We also calculated the value of the residual analgesic in each group of patients. An statistic analysis of the variable was made taking as a base:average and Standard desviation to compare the analysis a "T" test Student (p < 0.05) was realized. Results: It was calculated the value of the sensitive block reporting in Group I 10.46 ± 1.46 metameras and in Group II 13.51 ± 2.65 metameras with one p < 0.0001. The motor block reported a quicker recovery in Group I with 229.29 ± 21.94 minutes in relation to 266.09±21.42 minutes of Group II with p < 0.0001. Postoperatory analgesic of Group I was 9.48 ± 1.82 hours and of 5.65 ± 1.05 hours in the Group II (p < 0.0001). Conclusions: In our study ropivacaine 0.75% showed more effectiveness as local anesthetic intrathecal compared to bupivacaína al 0.5% as it showed a more lasting residual analgesic as well as motor block recovery an a less time and without big hemodynamic effects.
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