The Addis Sediment Count and Blood Urea Clearance Test in Normal Pregnant Women.

Many tests have been done to evaluate renal function in the toxemias of pregnancy and investigators (1, 2, 3, 4, 5) are agreed that the most accurate is the blood urea clearance. Addis (6, 7) has studied the urinary sediment in both normal and nephritic patients and is able by this means to classify the nephritides more accurately. These two tests are the most sensitive and accurate of anyused to determine the character and extent of damage of the kidneys. However, there is a scarcity of Addis count values in normal pregnant women. Both tests have been used in this clinic to find the limits of variation in normal women in the last trimester of pregnancy, as a means of obtaining a better basis for comparison of values obtained in cases of toxemia, which have their onset during this period.