Anestesia Dissociativa e Infiltração Intraperitoneal de Bupivacaína no Controle de Dor em Gatas

Abstract

Four unmarried cats (Felis silvestris catus) were followed and taken to the Veterinary Hospital of the Faculty of Veterinary Medicine, located on the campus. Females were submitted to a dissociative anesthetic protocol consisting of ketamine (15mg/kg), acepromazine (0.03mg/kg), pethidine (3mg/kg) and midazolam (0.4mg/kg). Before abdominal muscle suturing, the local anesthetic bupivacaine at the dose of (2 mg/kg) was instilled into the intraperitoneal cavity. In the trans-operative period, the parameters of heart rate, respiratory rate, non-invasive blood pressure by vascular Doppler and rectal temperature were measured in the pre-anesthetic moments (M0), after connection to the multiparameter monitor (M1), at the moment of (M2), end of surgery (M3) and 4 hours after the end of surgery (M4). It was verified that the values of systolic blood pressure increased above 150 mmHg at the moment of the ovarian pedicle clamping (M2), being a sign of pain in the transsurgical and the values of the sums were obtained by the scale in (M4) it was demonstrated that the procedure caused mild to moderate pain in the cats and the analgesic rescue with tramadol (4mg/kg) in 4 (four) cats was performed. It was concluded that the administration of the dissociative anesthetic together with the pre-anesthetic medication in the same syringe and at the same moment did not prevent the undesirable reactions of ketamine, the intraperitoneal administration of bupivacaine was not enough to give ideal analgesia and the evaluation of the pain allowed to evaluate and treat pain efficiently.