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Revista de Investigaciones Veterinarias del Perú

versão impressa ISSN 1609-9117

Resumo

HUAYTA HUANCA, Jhon David. Evaluation of four protocols of anesthesia on changes in vital functions in the canine ovariohysterectomy. Rev. investig. vet. Perú [online]. 2016, vol.27, n.3, pp.458-466. ISSN 1609-9117.  http://dx.doi.org/10.15381/rivep.v27i3.11427.

The aim of this study was to evaluate the effects of four protocols of anesthesia on vitalfunctions(heartrate,pulse,respiratoryrate,bodytemperature,and oxygen saturation) in thecanineovariohysterectomy. Thirtytwobitches(1-8years),clinicallyhealthy,without distinction ofbreed and bodyweight, andclassifiedasASAI (84.4%) and II (15.6%)were submitted to elective surgery (not emergencies). The animals were distributed in four groups where each group was object of a specific anesthetic protocol. Protocol 1: Premedication with acepromazine and morphine; induction with diazepam and ketamine; maintenancewith xylazine;Protocol2:induction with diazepamandketamine;maintenance with xylazine and ketamine; Protocol 3: Induction with propofol and diazepam; maintenance with propofol and fentanyl; Protocol 4: Induction with propofol; maintenance with isoflurane and fentanyl. Data collection was done during four periods of the surgical procedure: pre-surgery, induction, maintenance, and end of the surgery. There was statistical difference (p<0.05) on heart rate during the induction period between protocol 4 and protocols 1 and 2 and in the maintenance period between protocols 3 and 4; on pulse between protocols 3 and 4 during the maintenance period; on oxygen saturation during maintenance period and end of the surgery between protocols, except between protocols 1 and 2; and on temperature between protocols 1 and 2 during the induction and maintenance periods. Clinically, records of heart rate, pulse, and respiratory rate showed major unfavorable changes in protocol 2 (tachycardia, bradycardia, hypokinetic pulses and tachypnea). Highly severe hypoxemia was observed in protocol 3 and hypothermia in all groups but especially in protocol 1. Adequate surgical anesthetic plane was obtained in protocols 1 and 3. It is concluded that protocol 1 is the most suitable for surgical procedures of canine ovariohysterectomy.

Palavras-chave : protocols; anesthesia; ovariohysterectomy; canine; induction; hypoxemia.

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