RESUMO
OBJECTIVE: To evaluate the cardiopulmonary effects of low-pressure (6 mmHg) peritoneal insufflation of varying duration in healthy cats during ovariectomy (OVE). STUDY DESIGN: Prospective, randomized study. ANIMALS: Female cats (n = 24). METHODS: After anesthesia induction, cats had short (Short LAP; n = 8) or long duration (Long LAP; n = 8) laparoscopic ovariectomy, or Open OVE (Open; n = 8) for comparison. Hemodynamic and pulmonary measurements were recorded after induction of anesthesia (T0), 5 minutes after abdominal insufflation had reached 6 mmHg of pressure (T1), after the 2nd ovary had been resected (T2), after abdominal decompression (T3), and at the end of anesthesia, after abdominal closure (T4). Hemodynamic and pulmonary variables were compared between groups. RESULTS: Low-pressure abdominal insufflation caused cardiopulmonary changes in cats. At T1 and T2, Long LAP and Short LAP caused a significant change in PvCO2 and RC when compared with Open. During T3, RC was lower only in Long LAP. At T2, there was decrease in SV, but not CO for Long LAP when compared with Open. CONCLUSIONS: Duration of insufflation was associated with worsening of negative cardiopulmonary effects; however, these effects were reversible and resolved by the end of the procedure.
Assuntos
Doenças Cardiovasculares/veterinária , Doenças do Gato/etiologia , Insuflação/veterinária , Laparoscopia/veterinária , Pneumopatias/veterinária , Ovariectomia/veterinária , Animais , Gasometria/veterinária , Determinação da Pressão Arterial/veterinária , Dióxido de Carbono/administração & dosagem , Dióxido de Carbono/farmacologia , Doenças Cardiovasculares/etiologia , Doenças do Gato/fisiopatologia , Gatos , Feminino , Frequência Cardíaca/efeitos dos fármacos , Hemodinâmica/fisiologia , Insuflação/efeitos adversos , Complicações Intraoperatórias/etiologia , Complicações Intraoperatórias/veterinária , Síndrome do QT Longo/etiologia , Síndrome do QT Longo/veterinária , Pneumopatias/etiologia , Monitorização Intraoperatória , Cavidade Peritoneal , Estudos Prospectivos , Testes de Função Respiratória/veterináriaRESUMO
A combination of medetomidine (M, 100 µg/kg), ketamine (K, 10 mg/kg) and buprenorphine (B, 10 µg/kg), administered by intramuscular injection, was evaluated for spaying and castration (neutering) of feral cats (n = 101). Eleven animals (11%) required supplemental anesthesia (isoflurane by mask) to maintain an adequate plane of surgical anesthesia. Atipamezole (A, 125 µg/kg) was administered subcutaneously at the completion of surgery. All cats recovered from surgery and were released the following day. A hemoglobin saturation (SpO(2)) value of < 95% was recorded at least once during anesthesia in all cats. This MKB combination can be used in a feral cat sterilization clinic, but isoflurane supplementation may be necessary. Further research is indicated to determine the clinical significance of the low SpO(2) values associated with this anesthetic regimen.