Effect of Diatrizoate on Renal Extraction of Pah in Man

Abstract

The effect of diatrizoate on the renal extraction of para-amino hippurate (EPAH) was studied in 8 healthy male volunteers. The contrast medium was injected into an antecubital vein and into a renal vein in each individual. A single-injection technique for the determination of EPAH was used and EPAH was measured before and over a period of 30 min after each contrast medium injection. In addition, the renal extraction of diatrizoate was measured simultaneously. Small but significant and similar decreases in EPAH were observed after both antecubital and renal venous administrations of the contrast medium, with a duration of less than 30 min after the injection. The renal extraction ratio for the diatrizoate was 0.20. It is concluded that diatrizoate should not be used before the determination of EPAH, at least not until 30 min after the administration of the contrast medium. The decrease in EPAH caused by diatrizoate seems to be due to a direct tubular depressant effect.

Keywords

Diatrizoate PAH kidney,extraction ratio

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