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  • Title: The effect of water loading on albumin excretion in type I diabetes mellitus.
    Author: Wiegmann TB, Chonko AM, Herron K, MacDougall ML, Moore WV.
    Journal: J Diabet Complications; 1989; 3(4):187-90. PubMed ID: 2533209.
    Abstract:
    An increased albumin excretion rate is recognized as an important early marker for incipient kidney disease in patients with diabetes mellitus. Many different techniques have been used, and a single void technique has been proposed as the simplest method for screening for increased albumin excretion. We evaluated a previous observation that single void samples during water diuresis yield increased albumin excretion rates. Timed day, night, and 24 hour albumin excretion rates (AER) were obtained in 35 patients with Type I diabetes mellitus. This was followed by examination of 8 consecutive half-hour specimens obtained during continued water diuresis. We compared 26 patients with low AER (less than 20 micrograms/min/24 hr sample) to 9 patients with high AER (greater than 20 and less than 200 micrograms/min/24 hr). Sampling began 60 min after the initiation of the waterload. At first, the AER in the low AER group was significantly higher than it was at night, but it decreased over 60 to 90 min of sampling to levels comparable with daytime AER. This was paralleled by a similar pattern in urine flow rate, sodium, and solute excretion. The AER in the high AER group did not increase with the water load and remained high throughout the study periods. The pattern of urine flow rate, sodium, and solute excretion was similar to that of the group with low AER. The study demonstrates that early sampling after water-induced diuresis leads to overestimation of AER in patients with low AER as compared to patients with high AER.(ABSTRACT TRUNCATED AT 250 WORDS)
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