Rehberg, P.B.

Before (within a week) and during the treatment (every 2 months), all patients underwent blood chemistry, urinalysis, and Rehberg test.

The analysis of blood chemistry parameters (creatinine, urea), daily Rehberg test, total protein in the urine, and total and partial RN parameters established their relationship, which confirmed the diagnostic value of both methods--biochemical and CRS (Table 2).

There was also a statistically significant relationship between the total GFRbased on the 24-hour Rehberg test and RN parameters, D, % (RP excretion rate from the parenchyma at the "cortex-medulla" level) and [GB.sub.20] (a 20-minute level of RP concentration in the urinary bladder in the basic CRS test) (Figure 2).