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Methoxyflurane Nephrotoxicity: Title and subTitle BreakA Study of Dose Response in Man FREE

Michael J. Cousins, MB; Richard I. Mazze, MD
[+] Author Affiliations

Reprint requests to Department of Anesthesia, Stanford University School of Medicine, Stanford University Service, Veterans Administration Hospital, Palo Alto, CA 94304 (Dr. Cousins).


JAMA. 1973;225(13):1611-1616. doi:10.1001/jama.1973.03220410023005
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Dose-related abnormalities in renal function occurred in ten of 18 patients following administration of methoxyflurane (Penthrane) with the usual anesthetic adjuvants. Eight control patients anesthetized with halothane (Fluothane) showed no abnormalities in renal function.

Subclinical toxicity occurred following methoxyflurane at minimum alveolar concentration (MAC) for 2.5 to 3 hours, that is 2.5 to 3 MAC hours (serum inorganic fluoride, >50 micromols/liter), while clinical toxicity was present in all patients at dosages greater than five MAC hours (serum inorganic fluoride, >90 micromols/liter). Superimposed on the dose-response relationship were other factors that probably increased nephrotoxicity. These were as follows: individual variations in metabolism of methoxyflurane; increased sensitivity to the nephrotoxic effects of inorganic fluoride; presence of enzyme induction; and interaction of methoxyflurane with other nephrotoxic drugs.

The use of methoxyflurane in clinical anesthesia should be restricted to situations where it offers specific advantages and where dosages less than 2.5 MAC hours can be attained.

REFERENCES

Mazze RI, Shue GL, Jackson SH:  Renal dysfunction associated with methoxyflurane anesthesia: A randomized, prospective clinical evaluation . JAMA 216:278-288, 1971;.
Mazze RI, Trudell JR, Cousins MJ:  Methoxyflurane metabolism and renal dysfunction: Clinical correlation in man . Anesthesiology 35:247-252, 1971;.
Cousins MJ, Nishimura TG, Mazze RI:  Renal effects of low-dose methoxyflurane with cardiopulmonary bypass . Anesthesiology 36:286-292, 1972;.
Mazze RI, Cousins MJ, Kosek JC:  Dose-related methoxyflurane nephrotoxicity in rats: A biochemical and pathological correlation . Anesthesiology 36:571-587, 1972;.
Mazze RI, Cousins MJ, Kosek JC:  Strain differences in metabolism and susceptibility to the nephrotoxic effects of methoxyflurane in rats . J Pharmacol Exp Ther 184:481-488, 1973;.
Kosek JC, Mazze RI, Cousins MJ:  The morphology and pathogenesis of nephrotoxicity following methoxyflurane (Penthrane) anesthesia: An experimental model in rats . Lab Invest 27:575-580, 1972;.
 Methoxyflurane Nephrotoxicity. Committee on Anesthesia, National Academy of Science, National Research Council . JAMA 217:958-959, 1971;.
Saidman LJ, et al:  Minimum alveolar concentrations of methoxyflurane, halothane, ether and cyclopropane in man: Correlation with theories of anesthesia . Anesthesiology 28:994-1002, 1967;.
Hayes MA, Goldenberg IS:  Renal effects of anesthesia and operation mediated by endocrines . Anesthesiology 24:487-499, 1963;.
Crandell WB, Pappas SG, Macdonald A:  Nephrotoxicity associated with methoxyflurane anesthesia . Anesthesiology 27:591-607, 1966;.
Aprahamian HA, et al:  The influence of general anesthetics on water and solute excretion in man . Ann of Surg 150:122-130, 1959;.
Mazze RI, Cousins MJ:  Combined nephrotoxicity of gentamicin and methoxyflurane anesthesia in man . Br J Anaesth 45:394-398, 1973;.
Barr GA, et al:  An animal model for combined methoxyflurane and gentamicin nephrotoxicity . Br J Anaesth 45:306-312, 1973;.
Kuzucu EY:  Methoxyflurane, tetracycline, and renal failure . JAMA 211:1162-1164, 1970;.
Hollenberg NK, et al:  Irreversible acute oliguric renal failure: A complication of methoxyflurane anesthesia . N Engl J Med 286:877-879, 1972;.
Panner BJ, et al:  Toxicity following methoxyflurane anesthesia: I. Clinical and pathological observations in two fatal cases . JAMA 214:86-90, 1970;.
Wiseman A:  Effect of inorganic fluoride on enzymes , in Smith FA (ed): Handbook of Experimental Pharmacology , vol 20, Pharmacology of Fluorides, part (2) . New York, Springer-Verlag, 1970;, pp 48-93.
Whitford GM, Taves DR:  Fluoride-induced diuresis: Renal tissue solute concentrations, functional, hemodynamic, and histological correlates in the rat . Anesthesiology , to be published.
Halpren BA, Kempson RL, Coplon NA:  Interstitial fibrosis and chronic renal failure following methoxyflurane anesthesia . JAMA 223:1239-1242, 1973;.
Lowe HJ: Dose-regulated Penthrane (methoxyflurane) anesthesia . North Chicago, Abbott Laboratories, 1972;.

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Mazze RI, Shue GL, Jackson SH:  Renal dysfunction associated with methoxyflurane anesthesia: A randomized, prospective clinical evaluation . JAMA 216:278-288, 1971;.
Mazze RI, Trudell JR, Cousins MJ:  Methoxyflurane metabolism and renal dysfunction: Clinical correlation in man . Anesthesiology 35:247-252, 1971;.
Cousins MJ, Nishimura TG, Mazze RI:  Renal effects of low-dose methoxyflurane with cardiopulmonary bypass . Anesthesiology 36:286-292, 1972;.
Mazze RI, Cousins MJ, Kosek JC:  Dose-related methoxyflurane nephrotoxicity in rats: A biochemical and pathological correlation . Anesthesiology 36:571-587, 1972;.
Mazze RI, Cousins MJ, Kosek JC:  Strain differences in metabolism and susceptibility to the nephrotoxic effects of methoxyflurane in rats . J Pharmacol Exp Ther 184:481-488, 1973;.
Kosek JC, Mazze RI, Cousins MJ:  The morphology and pathogenesis of nephrotoxicity following methoxyflurane (Penthrane) anesthesia: An experimental model in rats . Lab Invest 27:575-580, 1972;.
 Methoxyflurane Nephrotoxicity. Committee on Anesthesia, National Academy of Science, National Research Council . JAMA 217:958-959, 1971;.
Saidman LJ, et al:  Minimum alveolar concentrations of methoxyflurane, halothane, ether and cyclopropane in man: Correlation with theories of anesthesia . Anesthesiology 28:994-1002, 1967;.
Hayes MA, Goldenberg IS:  Renal effects of anesthesia and operation mediated by endocrines . Anesthesiology 24:487-499, 1963;.
Crandell WB, Pappas SG, Macdonald A:  Nephrotoxicity associated with methoxyflurane anesthesia . Anesthesiology 27:591-607, 1966;.
Aprahamian HA, et al:  The influence of general anesthetics on water and solute excretion in man . Ann of Surg 150:122-130, 1959;.
Mazze RI, Cousins MJ:  Combined nephrotoxicity of gentamicin and methoxyflurane anesthesia in man . Br J Anaesth 45:394-398, 1973;.
Barr GA, et al:  An animal model for combined methoxyflurane and gentamicin nephrotoxicity . Br J Anaesth 45:306-312, 1973;.
Kuzucu EY:  Methoxyflurane, tetracycline, and renal failure . JAMA 211:1162-1164, 1970;.
Hollenberg NK, et al:  Irreversible acute oliguric renal failure: A complication of methoxyflurane anesthesia . N Engl J Med 286:877-879, 1972;.
Panner BJ, et al:  Toxicity following methoxyflurane anesthesia: I. Clinical and pathological observations in two fatal cases . JAMA 214:86-90, 1970;.
Wiseman A:  Effect of inorganic fluoride on enzymes , in Smith FA (ed): Handbook of Experimental Pharmacology , vol 20, Pharmacology of Fluorides, part (2) . New York, Springer-Verlag, 1970;, pp 48-93.
Whitford GM, Taves DR:  Fluoride-induced diuresis: Renal tissue solute concentrations, functional, hemodynamic, and histological correlates in the rat . Anesthesiology , to be published.
Halpren BA, Kempson RL, Coplon NA:  Interstitial fibrosis and chronic renal failure following methoxyflurane anesthesia . JAMA 223:1239-1242, 1973;.
Lowe HJ: Dose-regulated Penthrane (methoxyflurane) anesthesia . North Chicago, Abbott Laboratories, 1972;.
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