Estudo comparativo do uso de clonidina administrada por via venosa, versus subaracnóidea, em pacientes submetidos à colecistectomia videolaparoscópica

Abstract

BACKGROUND. Untreated pain leads to postoperative complications that prolong hospital stay. The association of analgesic drugs with different mechanisms of action, such as clonidine, allows the use of smaller doses of medication for better control of pain. OBJECTIVES. This dissertation aims to evaluate the use of multimodal analgesia in the control of postoperative pain in patients submitted to videolaparoscopic cholecystectomy (VLC); to compare the analgesic activities of intrathecal and intravenous clonidine for postoperative analgesia; to analyze the need for analgesic drugs in the immediate postoperative (tramadol / morphine) and to identify possible complications. METHOD. A prospective, randomized clinical trial was conducted with patients divided into three blocks, with 20 patients each one: Group I (n = 20) control, submitted to standard anesthesia; Group II (n = 20) intrathecal clonidine, submitted to standard anesthesia associated with the use of intrathecal clonidine; Group III (n = 20) intravenous clonidine, submitted to standard anesthesia associated with the use of intravenous clonidine. RESULTS. The pain scores between the groups did not present significant differences, but a greater analgesic need was observed in the control group (p = 0.005), as well as a higher incidence of nausea and vomiting (p = 0.240), probably due to side effects of morphine as rescue medication. Groups II and III presented a significant reduction of heart rate (p ˂ 0.001), but without clinical repercussion. CONCLUSIONS. In patients undergoing VLC there is evidence that the perioperative administration of alpha 2-agonists preserves hemodynamic stability, decreases opioid consumption and the incidence of nausea and vomiting in the postoperative.