p-amino hippuric acid clearance

After intravenous injection of PAH into the human body, when the concentration is low (ie, the plasma content does not exceed 30 mg/L), about 205 PAH is filtered by the glomerulus, about 80% is excreted from the renal tubule, and is not Renal tubular reabsorption, PAH is almost completely cleared by the kidneys, and its clearance rate actually represents renal blood flow (RBF). Under normal circumstances, about 8% of renal arterial blood supply the renal capsule and connective tissue, and the blood flowing through the non-urinary part of the kidney does not clear the PAH, so the measured RPF should be effective renal plasma flow (ERPF). Basic Information Specialist classification: urinary examination classification: urine / kidney function test Applicable gender: whether men and women apply fasting: fasting Tips: Keep a normal mindset. Normal value RPF or CPAH is 600 to 800 ml/min. The RBF is 1200 to 1400 ml/min. Clinical significance RPF reduction is seen in the reduction of cardiac stroke; renal arterial lesions; renal dysfunction. Precautions The substances used for the measurement of blood flow are p-aminopuric acid, sulphuric acid and phenol red. Among them, aminoacetic acid is most commonly used. Inspection process Adequate amount of mid-stage urine, sent for inspection. Not suitable for the crowd There are no taboos. Adverse reactions and risks No.

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