Abstract
In monkeys, dogs and swine (six each) we tested the reduction of the isoflurane MAC (minimal alveolar concentration) produced by 2 mg‐kg‐1 morphine intravenously (i‐v.) and the concurrent effect on Pco2 with spontaneous ventilation. MAC fell to a minimum of 55% of control at 53 min in monkeys, 50% at 38 min in dogs and 13% at 33 min in swine. Paco2 rose at constant MAC with morphine to 55–60 mmHg, but did not fall over the next several hours despite the decline of plasma morphine concentration, and the resulting needed rise in isoflurane concentration to keep the anaesthesia depth at 1 MAC. After isoflurane concentration had returned to pre‐morphine control levels, naloxone immediately reduced Paco2 to or below control level. Morphine pharmacokinetics in the three species studied conformed to a two‐compartment model.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 202-210 |
| Number of pages | 9 |
| Journal | Journal of Veterinary Pharmacology and Therapeutics |
| Volume | 17 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jan 1 1994 |
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ASJC Scopus subject areas
- Pharmacology
- veterinary(all)
Cite this
Morphine‐isoflurane interaction in dogs, swine and Rhesus monkeys. / Steffey, Eugene; BAGGOT, J. D.; EISELE, J. H.; WILLITS, N.; WOLINER, M. J.; JARVIS, K. A.; ELLIOTT, A. R.; TAGAWA, M.
In: Journal of Veterinary Pharmacology and Therapeutics, Vol. 17, No. 3, 01.01.1994, p. 202-210.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Morphine‐isoflurane interaction in dogs, swine and Rhesus monkeys
AU - Steffey, Eugene
AU - BAGGOT, J. D.
AU - EISELE, J. H.
AU - WILLITS, N.
AU - WOLINER, M. J.
AU - JARVIS, K. A.
AU - ELLIOTT, A. R.
AU - TAGAWA, M.
PY - 1994/1/1
Y1 - 1994/1/1
N2 - In monkeys, dogs and swine (six each) we tested the reduction of the isoflurane MAC (minimal alveolar concentration) produced by 2 mg‐kg‐1 morphine intravenously (i‐v.) and the concurrent effect on Pco2 with spontaneous ventilation. MAC fell to a minimum of 55% of control at 53 min in monkeys, 50% at 38 min in dogs and 13% at 33 min in swine. Paco2 rose at constant MAC with morphine to 55–60 mmHg, but did not fall over the next several hours despite the decline of plasma morphine concentration, and the resulting needed rise in isoflurane concentration to keep the anaesthesia depth at 1 MAC. After isoflurane concentration had returned to pre‐morphine control levels, naloxone immediately reduced Paco2 to or below control level. Morphine pharmacokinetics in the three species studied conformed to a two‐compartment model.
AB - In monkeys, dogs and swine (six each) we tested the reduction of the isoflurane MAC (minimal alveolar concentration) produced by 2 mg‐kg‐1 morphine intravenously (i‐v.) and the concurrent effect on Pco2 with spontaneous ventilation. MAC fell to a minimum of 55% of control at 53 min in monkeys, 50% at 38 min in dogs and 13% at 33 min in swine. Paco2 rose at constant MAC with morphine to 55–60 mmHg, but did not fall over the next several hours despite the decline of plasma morphine concentration, and the resulting needed rise in isoflurane concentration to keep the anaesthesia depth at 1 MAC. After isoflurane concentration had returned to pre‐morphine control levels, naloxone immediately reduced Paco2 to or below control level. Morphine pharmacokinetics in the three species studied conformed to a two‐compartment model.
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UR - http://www.scopus.com/inward/citedby.url?scp=0028363611&partnerID=8YFLogxK
U2 - 10.1111/j.1365-2885.1994.tb00234.x
DO - 10.1111/j.1365-2885.1994.tb00234.x
M3 - Article
C2 - 7933058
AN - SCOPUS:0028363611
VL - 17
SP - 202
EP - 210
JO - Journal of Veterinary Pharmacology and Therapeutics
JF - Journal of Veterinary Pharmacology and Therapeutics
SN - 0140-7783
IS - 3
ER -