Avaliação da analgesia pós-operatória da dexmedetomidina isolada e associada à morfina quando utilizada na medicação pré-anestésica em cadelas submetidas à ovariosalpingohisterectomia eletiva / Evaluation of postoperative analgesia of dexmedetomidine alone or associated to morphine as premedicants in bitches undergoing ovariosalpingohisterectomy

Background: Elective ovariossalpingohysterectomy is a common surgery that causes mild to moderate pain. Aiming at the treatment of pain in these patients, analgesia should be balanced from pre-anesthetic, transoperative and postoperative medication, with-2-agonists and opioids being commonly used, especially dexmedetomidine that has sedation, relaxation muscle and analgesia.The aim of the present study was to evaluate the postoperative analgesic efficacy of dexmedetomidine alone and associated withmorphine when used in the preanesthetic medication of bitches submitted to elective ovarian oysterectomy using the modifiedGlasgow pain scale and the Melbourne pain scale.Materials, Methods & Results: Twenty bitches were used in this study, all of them submitted to ovarian oysterectomy, and were clinically healthy according to laboratory and clinical exams. During the experiment, bitches were randomly distributed into two groups,which received preanesthetic medication (MPA) with 5 μg/kg dexmedetomidine alone (GD) or associated with 0.3 mg/kg morphine(GDM) intramuscularly (IM). In both groups, anesthetic induction with dose-effect propofol was performed and maintained withisoflurane diluted in 100% oxygen administered through a calibrated vaporizer and appropriate anesthetic system based on the weightof the animal and maintained on spontaneous ventilation. After stabilization of the patient the surgery was started, which lasted 45min. The bitches were evaluated by the Modified Glasgow Scale (GSM), the Melbourne Scale (MS) and the Dobbins Sedation Scale(DS), previously administered MPA (T0) and the others performed in 1h (T1), 2h (T2), 4h (T3), 8h (T4), 12h (T5) and 24h (T6) afterextubation. If the GSM score was greater than the value of 3.3 an analgesic rescue of 0.5 mg/kg of morphine intramuscularly would beadministered. An increase in the scoring of pain scales in both groups can be observed from the T1, with significant difference only ofthe...(AU)

Avaliação da analgesia pós-operatória da dexmedetomidina isolada e associada à morfina quando utilizada na medicação pré-anestésica em cadelas submetidas à ovariosalpingohisterectomia eletiva / Evaluation of postoperative analgesia of dexmedetomidine alone or associated to morphine as premedicants in bitches undergoing ovariosalpingohisterectomy

Background: Elective ovariossalpingohysterectomy is a common surgery that causes mild to moderate pain. Aiming at the treatment of pain in these patients, analgesia should be balanced from pre-anesthetic, transoperative and postoperative medication, with-2-agonists and opioids being commonly used, especially dexmedetomidine that has sedation, relaxation muscle and analgesia.The aim of the present study was to evaluate the postoperative analgesic efficacy of dexmedetomidine alone and associated withmorphine when used in the preanesthetic medication of bitches submitted to elective ovarian oysterectomy using the modifiedGlasgow pain scale and the Melbourne pain scale.Materials, Methods & Results: Twenty bitches were used in this study, all of them submitted to ovarian oysterectomy, and were clinically healthy according to laboratory and clinical exams. During the experiment, bitches were randomly distributed into two groups,which received preanesthetic medication (MPA) with 5 μg/kg dexmedetomidine alone (GD) or associated with 0.3 mg/kg morphine(GDM) intramuscularly (IM). In both groups, anesthetic induction with dose-effect propofol was performed and maintained withisoflurane diluted in 100% oxygen administered through a calibrated vaporizer and appropriate anesthetic system based on the weightof the animal and maintained on spontaneous ventilation. After stabilization of the patient the surgery was started, which lasted 45min. The bitches were evaluated by the Modified Glasgow Scale (GSM), the Melbourne Scale (MS) and the Dobbins Sedation Scale(DS), previously administered MPA (T0) and the others performed in 1h (T1), 2h (T2), 4h (T3), 8h (T4), 12h (T5) and 24h (T6) afterextubation. If the GSM score was greater than the value of 3.3 an analgesic rescue of 0.5 mg/kg of morphine intramuscularly would beadministered. An increase in the scoring of pain scales in both groups can be observed from the T1, with significant difference only ofthe...

Avaliação dos efeitos cardiorrespiratórios da dexmedetomidina isolada e associada à morfina em cadelas submetidas à ovariossalpingohisterectomia eletiva sob anestesia geral inalatória / Evaluation of cardiorespiratory effects of dexmedetomidine isolated and associated with morphine in bitches submitted to elective ovariossalpingohisterectomy under general inhalation anesthesia

Background: Elective ovariossalpingohysterectomy is one of the most accomplished surgeries in veterinary practice, presenting moderate degree of pain. Aiming at balanced anesthesia, α2-agonists have been increasingly used, with dexmedetomidine being characterized by its sympatholytic, sedative, analgesic properties and synergism with opioids, benzodiazepines and other drugs. The objective of this study was to evaluate the effects of dexmedetomidine alone and associated with morphine under the cardiovascular, respiratory and body temperature variables in the pre and trans-operative periods in bitches submitted to elective ovariossalpingohisterectomy under general inhalation anesthesia.Materials, Methods & Results: Sixteen bitches were used in this study, which were submitted to elective ovariossalpingohisterectomy, all of which were clinically healthy based on clinical and hematological results. The animals were randomized into two groups, in which intramuscular dexmedetomidine alone and 5 µg/kg (DG) and 0.3 mg/kg morphine (GDM). In both groups, anesthesia was induced with propofol administered and maintained with isoflurane diluted in 100% oxygen administered through a calibrated vaporizer and appropriate anesthetic system based on the weight of the animal and kept under spontaneous ventilation. After stabilization of the patient, the surgical procedure started, which lasted 45 min. The parameters evaluated were heart rate (HR), respiratory rate (ƒ), systolic blood pressure (SBP), diastolic blood pressure (DBP), mean arterial pressure (MAP), body temperature (TºC), expired isoflurane concentration , partial carbon dioxide gas pressure (ETCO2 ) and oxygen saturation in hemoglobin (SatO2 ), which were measured before and after the application of preanesthetic medication and at specific surgical times:[...]

Avaliação dos efeitos cardiorrespiratórios da dexmedetomidina isolada e associada à morfina em cadelas submetidas à ovariossalpingohisterectomia eletiva sob anestesia geral inalatória / Evaluation of cardiorespiratory effects of dexmedetomidine isolated and associated with morphine in bitches submitted to elective ovariossalpingohisterectomy under general inhalation anesthesia

Background: Elective ovariossalpingohysterectomy is one of the most accomplished surgeries in veterinary practice, presenting moderate degree of pain. Aiming at balanced anesthesia, α2-agonists have been increasingly used, with dexmedetomidine being characterized by its sympatholytic, sedative, analgesic properties and synergism with opioids, benzodiazepines and other drugs. The objective of this study was to evaluate the effects of dexmedetomidine alone and associated with morphine under the cardiovascular, respiratory and body temperature variables in the pre and trans-operative periods in bitches submitted to elective ovariossalpingohisterectomy under general inhalation anesthesia.Materials, Methods & Results: Sixteen bitches were used in this study, which were submitted to elective ovariossalpingohisterectomy, all of which were clinically healthy based on clinical and hematological results. The animals were randomized into two groups, in which intramuscular dexmedetomidine alone and 5 µg/kg (DG) and 0.3 mg/kg morphine (GDM). In both groups, anesthesia was induced with propofol administered and maintained with isoflurane diluted in 100% oxygen administered through a calibrated vaporizer and appropriate anesthetic system based on the weight of the animal and kept under spontaneous ventilation. After stabilization of the patient, the surgical procedure started, which lasted 45 min. The parameters evaluated were heart rate (HR), respiratory rate (ƒ), systolic blood pressure (SBP), diastolic blood pressure (DBP), mean arterial pressure (MAP), body temperature (TºC), expired isoflurane concentration , partial carbon dioxide gas pressure (ETCO2 ) and oxygen saturation in hemoglobin (SatO2 ), which were measured before and after the application of preanesthetic medication and at specific surgical times:[...](AU)