[Shivering during epidural anesthesia with and without fentanyl: comparative study.].

Background And Objectives: Most studies in the literature correlating epidural opioids to postoperative shivering were carried out with obstetric patients whose thermoregulation center response might be different from non-pregnant patients. Our study aimed at comparing intra and postoperative shivering and other complications of epidural block with and without fentanyl in patients submitted to varicose vein surgery under epidural anesthesia with 0.5% bupivacaine and 1:200,000 epinephrine.

Patient controlled analgesia with fentanyl or sufentanil in the postoperative period of knee ligament reconstruction: comparative study.

Background And Objectives: Epidural opioids, associated or not to local anesthetics, have been used for postoperative analgesia in continuous infusion and/or patient controlled boluses. The aim of this study was to compare postoperative analgesia provided by epidural fentanyl or sufentanil, in bolus or continuous infusion, in patients submitted to knee ligament reconstruction.

Methods: Seventy ASA I - II patients, aged 16 to 47 years, were randomly distributed in two groups.