Final answer:
Asymptotic microscopic hematuria is the presence of both red and white blood cells in urine, indicative of various kidney conditions. The renal clearance test using PAH helps assess kidney function, with a normal rate being 80 mg/min/1.73 sqm. Filtration fraction varies in different kidney disorders, such as hypertension and glomerular nephritis.
Step-by-step explanation:
The term asymptotic microscopic hematuria refers to the presence of red and white blood cells in the urine as observed under a microscope, which is commonly associated with conditions such as nephritis, trauma, tuberculosis of the kidney, and kidney stones. The renal clearance test, which includes measurements with PAH (para-aminohippuric acid) at a concentration of 150 mg/100 ml of plasma, helps to assess the tubular filtration mass. A normal rate for this measurement is 80 mg/min/1.73 sqm of body surface area. Early hypertension shows normal FF (filtration fraction) which increases as the condition progresses, contrasting with glomerular nephritis where FF is decreased. These findings and measurements are crucial in diagnosing and understanding kidney-related disorders.