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  • Title: Serum inorganic fluoride and renal function in dogs after methoxyflurane anesthesia, tetracycline treatment, and surgical manipulation.
    Author: Fleming JT, Pedersoli WM.
    Journal: Am J Vet Res; 1980 Dec; 41(12):2025-9. PubMed ID: 7212437.
    Abstract:
    Effects of 2 hours of methoxyflurane-induced anesthesia in 25 dogs were determined by serum inorganic fluoride, serum urea nitrogen, serum creatinine, water intake, urine excretion, and urine specific gravity measurements; arterial concentrations of the anesthetic were also determined. The dogs were allotted to 5 groups (PTM, CTM, PTML, CTML, ML) of 5 dogs in each group and were anesthetized (M, in group designations) for 2 hours. The dogs were injected with chemically pure tetracycline or commercial tetracycline (PT and CT, in group designations) before, on the day of, and after anesthesia. In 3 groups, laparotomy (L, in group designations) was done; group ML did not receive tetracycline but a laparotomy was performed. Serum inorganic fluoride increased (P less than 0.05) in all groups 24 hours after anesthesia when compared with the base-line values; the highest mean serum concentration was 81.1 +/- 7.91 mumol/L (group PTM) and the lowest was 32.7 +/- 4.53 mumol/L (group PTML). There was no difference (P greater than 0.05) seen in serum urea nitrogen concentrations between groups. Methoxyflurane and tetracycline treatment caused no difference (P greater than 0.05) on serum concentrations of inorganic fluoride and urea nitrogen. Serum creatinine concentrations differed (P less than 0.05) only for groups PTM, CTM, PTML, and CTML vs group ML. Water intake reached peak at 48 hours after anesthesia. Arterial concentrations of methoxyflurane determined at 60 and 120 minutes of anesthesia indicated no difference (P greater than 0.05) among groups. Neither clinical nor laboratory signs of severe kidney dysfunction were detected in any of the experimental dogs during a 5-day observation period after anesthesia.
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