Comparative study between ketamine-S-dexmedetomidine and ketamine-S-midazolam-methadone in the anesthesia of capuchin monkeys (Sapajus apella)

Abstract

Anesthetic protocols have been developed to obtain the most effective and safe association in wildlife. This study compared the anesthetic effects and cardiorespiratory parameters of ketamine-S (+) (10 mg/kg)/dexmedetomidine (0.020 mg/kg) (KD ) and ketamine-S (+) (10 mg/kg)/midazolam (0.5 mg/kg)/methadone (1.0 mg/kg) (KMM ) in capuchin monkeys (Sapajus apella). Eight capuchin monkeys were randomly assigned to KD (n = 4) or KMM (n = 4) to evaluate induction, immobilization, and recovery scores, heart and respiratory rate parameters, besides systolic, mean, diastolic arterial pressure and arterial blood gas. There was no difference (P = 0.56) in the quality of induction, immobilization, and anesthetic recovery between the protocols. The time for anesthetic induction was 4 ± 1 min in the KD group and 5 ± 1 min in the KMM group, and these values were statistically equal (P = 0.28). The mean immobilization time in the KD and KMM groups were 35 ± 13 and 33 ± 15 min, respectively. Heart rate was lower in animals in the KD group (P < 0.001), while respiratory rate (P = 0.03), and mean blood pressure (P = 0.046) were higher than that of the animals in the KMM group. Respiratory acidosis occurred in the KMM group, with lower pH (7.25±0.047; P = 0.0055) and higher pCO2 (51 ± 6;mmHg; P = 0.008). Both protocols exhibited good induction quality, immobilization, and anesthetic recovery, despite cardiorespiratory and blood gas alterations observed, which warrants monitoring of cardiorespiratory variables during KD or KMM chemical restraint.

Anesthetic effects of isoflurane and fentanyl infusion in capuchin monkeys (Sapajus sp) undergoing salpingectomy or deferentectomy, previously chemically restrained with ketamine–midazolam or ketamine–dexmedetomidine

“…The combination of different doses of ketamine or dextroketamine, midazolam, and dexmedetomidine has already been used for the chemical restraint of capuchin monkeys 5–7,18–20 . However, the dose combinations used in the present study had not yet been investigated.…”

“…Ketamine, which is a dissociative anesthetic, is commonly used intramuscularly for chemical restraint in primates 1 . Benzodiazepines, α2‐adrenergic agonists and opioids can be combined with ketamine for chemical restraint of capuchin monkeys 5–7 …”

“…of capuchin monkeys [5][6][7][18][19][20]. However, the dose combinations used in the present study had not yet been investigated.…”

“…1 Benzodiazepines, α2-adrenergic agonists and opioids can be combined with ketamine for chemical restraint of capuchin monkeys. [5][6][7]…”