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Does pethidine affect the cardiovascular and sedative effects of dexmedetomidine in dogs?
Author(s) -
Grint N. J.,
Burford J.,
Dugdale A. H. A.
Publication year - 2009
Publication title -
journal of small animal practice
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.7
H-Index - 67
eISSN - 1748-5827
pISSN - 0022-4510
DOI - 10.1111/j.1748-5827.2008.00670.x
Subject(s) - dexmedetomidine , pethidine , medicine , premedication , anesthesia , sedation , heart rate , propofol , sedative , bradycardia , blood pressure , analgesic
O bjectives :To investigate pethidine’s effects on sedation and cardiovascular variables in dogs premedicated with dexmedetomidine.M ethods :Sixty American Society of Anesthesiologists (ASA) I dogs were presented for routine neutering. Heart rate was measured at admission. Dogs were randomly assigned to one of the five groups to decide premedication; group D5+P (dexmedetomidine 5 μg/kg plus pethidine 5 mg/kg), D10+P (dexmedetomidine 10 μg/kg plus pethidine 5 mg/kg) with three control groups, D5 (dexmedetomidine 5 μg/kg), D10 (dexmedetomidine 10 μg/kg) or P (pethidine 5 mg/kg). Heart rate was measured at 3, 5, 10 and 20 minutes after preanaesthetic medication. Simple descriptive scores for sedation were assigned after 20 minutes. Anaesthesia was induced using propofol and maintained using isoflurane in oxygen. Heart rate was recorded throughout anaesthesia.R esults :Sedation scores after preanaesthetic medication were significantly higher (P<0·001) in groups D5+P and D10+P compared with the other three groups. D5+P and D10+P groups tended to have lower heart rates in dogs at all time points after premedication compared with groups containing only pethidine or dexmedetomidine at the relevant dose.C linical S ignificance :Greater sedation is achieved using combinations of dexmedetomidine and pethidine compared with each drug alone. Pethidine does not attenuate the alpha‐2 adrenergic‐induced bradycardia.