Cardiovascular and analgesic effects of epidural administration of ropivacaine alone or in combination with morphine in cats/ Efeitos cardiovasculares e analgesicos da administracao epidural de ropivacaina isolada ou associada a morfina, em felinos

• Published in: Ciência rural 2014-12, Vol.44 (12), p.2228
• Main Authors: Regalin, Doughlas, Moresco, Marina, Padilha, Vanessa Sasso, Tocheto, Ronise, Oleskovicz, Nilson
• Format: Article
• Language: Spanish
• Subjects: Domestic cats; Morphine
• ISSN: 0103-8478
• DOI: 10.1590/0103-8478cr20131597

Seeking to evaluate the cardiovascular and analgesic effects of two epidural protocols in cats undergoing OH, 16 female adult mixed-breed cats were induced to general anesthesia, and then epidural was achieved with 0,26mL [kg.sup.-1] of isolated ropivacaine (GR) (0,75%) or associated with 0,1mg [kg.sup.-1] morphine (GRM). [ETCO.sub.2], RR, HR, SAP, T[degrees] and muscular relaxation were evaluated in baseline, 30 minutes after epidural; after skin incision, ovarian pedicles and uterine cervix ligation; end of laparohraphy; and end of surgery. They received fentanyl if SAP, HR or f, rise in 20% of baseline. At the end of OH, a multidimensional pain scale for cats was used during 12 hours, and rescued with morphine 0,2mg [kg.sup.-1], when the scale score was [greater than or equal to] 8 points. There were no differences in [ETCO.sub.2], RR, T[degrees]C and muscular relaxation. SAP increased in both groups during the ovarian pedicle and cervix clamping. In 100% of the animals in GR and 87.5% of the GRM, it was necessary fentanyl during surgery. In 100% of GR animals was required analgesic rescue with morphine at 2 and 4 hours of postoperative evaluation, compared with 50% and 37,5% in GRM, where after the analgesic rescue, in the next hours, the sum of points was similar between groups. It was concluded that epidural administration of morphine and ropivacaine in cats submitted to OH, reduces post operatory analgesic requirements to 56,2% during the first four hours, and promote adequate analgesia for 12 hours in cats submitted to OH, when compared to ropivacaine alone. Key words: analgesia, locoregional anesthesia, pain, pain scale, morphine. Visando avaliar os efeitos cardiovasculares e analgesicos de dois protocolos epidurais em felinos submetidos a OSH, 16 gatas mesticas, adultas, que, apos inducao a anestesia geral, receberam anestesia epidural (L7-S1) com 0,26mL [kg.sup.-1] de ropivacaina 0,75%, isolada (GR) ou associada a 0,1mg [kg.sup.-1] morfina (GRM). A [ETCO.sub.2] f, FC, PAS, T[degrees]R e relaxamento muscular foram avaliados no momento basal, 30 minutos apos epidural, apos incisao de pele, ligadura dos pediculos ovarianos e cervix, final da celiorrafia e cirurgia, sendo administrado fentanil, caso ocorresse aumento de 20% na PAS, FC ou f em relacao ao momento basal. Ao final do procedimento, foram avaliados, com auxilio de uma escala multidimensional de dor aguda em felinos, durante 12 horas, e, quando a pontuacao fosse [greater than or equal to]