Proteinuria is one of the most common clinical manifestations of the urinary system disease and one of the earliest detectable indicators. There is a small amount of protein in the urine of normal people, the content of which is not more than 200 mg /24 hours, so the qualitative method of general urine protein can not be detected. When the urine protein is greater than 200 mg / 24 hours, it is called proteinuria.
Proteinuria is the most common form of glomerulonephritis, and proteinuria occurs in most nephritis. Therefore, urine protein positive, people generally think of is glomerular disease. But in fact, not all proteinuria is caused by glomerulopathy, and proteinuria can also occur in many other cases, including urinary tract infections.
Urinary tract infection occurs when the case of proteinuria is often seen, but this time the proteinuria has its own characteristics. Acute urinary tract infection, the urine may have a small amount or trace protein, mostly mucus protein, urine protein qualitative (+) or less. Suffering from chronic pyelonephritis increased urinary protein, but 24-hour urine protein is still within 1 gram of quantitative.
It is noteworthy that few patients with urinary tract infection secondary to focal glomerulosclerosis and urinary tract infection caused by reflux kidney disease, there may be massive proteinuria (more than 3.5 grams of /24 hours), and may lead to nephrotic syndrome, often with primary glomerular disease is not easy to distinguish, for diagnosis of renal biopsy.
Beijing In China