• Rev Esp Anestesiol Reanim · Jan 2005

    Randomized Controlled Trial Comparative Study Clinical Trial

    [Popliteal fossa sciatic nerve block for ambulatory hallux valgus surgery: comparison of lateral and posterior approaches].

    • P Suárez Ruiz, S López Alvarez, A Sarmiento Penide, M J Barbeito Vilariño, C Bonome González, and J M Cobián Llamas.
    • Servicio Anestesiología y Reanimación, Unidad de Cirugía sin Ingreso del Hospital Abente y Lago, Complexo Hospitalario Universitario Juan Canalejo, A Coruña. pachisuarez@yahoo.es
    • Rev Esp Anestesiol Reanim. 2005 Jan 1;52(1):4-8.

    ObjectiveThe aim of this study was to assess the efficacy, effectiveness, technical difficulty, and clinical usefulness of the popliteal sciatic peripheral nerve block for unilateral hallus valgux surgery and to compare the posterior and lateral approaches. We also aimed to investigate patient comfort during the procedure.Materials And MethodsThis prospective, randomized trial enrolled 60 patients scheduled for unilateral hallux valgus surgery. The patients were randomly assigned to groups of 30 patients to receive a nerve block by either a posterior or lateral approach. A nerve stimulator was used to locate the response of the two branches forming the sciatic nerve--the posterior tibial nerve and the common peroneal nerve. Then, 20 mL of 0.5% ropivacaine was injected for each nerve. Variables analyzed were efficacy, complications, quality and duration of postoperative analgesia, degree of comfort while the technique was being performed, and level of satisfaction.ResultsThe level of comfort was good for 19 patients (70%) in the posterior approach group and for 29 (97%) in the lateral approach group (P<0.05). Level of satisfaction was good or very good for 93% and 96% of the patients in the posterior and lateral approach groups, respectively. Block efficacy was excellent for 48 patients (80%), good for 9 (15%), and poor for 3 (5%), with no significant differences between the groups.ConclusionBoth the posterior and lateral approaches provide easy access to the sciatic nerve for performing a block. The rate of success is high and postoperative analgesia is good, with no noteworthy complications. However, the lateral approach is more comfortable for the patient.

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