Glycosuria

As glucosuria or glycosuria refers to the elimination of sugar ( glucose) in the urine by the kidney. Urine glucose values ​​of 15 mg / dl ( 0.8 mmol / l ) in the " fasting urine ", which is about 15 % of the normal blood sugar levels, are still considered physiological. Food Caused the values ​​of " non-fasting urine " to can be twice as high. If the " fasting urine " values ​​measured, however, the ( 0.8 mmol / l ) are greater than 15 mg / dl, it is called glucosuria.

Cause of glucosuria first, for an increase in blood glucose concentration (for example, diabetes mellitus ), thus exceeding the renal threshold, on the other renal disorders such as diabetes renal be. Furthermore, there is a genetic form of renal glucosuria is called. This form there is a mutation in the sodium / glucose cotransporter type 2 ( SGLT2 ). It is to be regarded as harmless.

The renal threshold is an individual blood glucose concentration of about 140-170 mg / dl ( 7.7 to 9.35 mmol / l). From then not all filtered glucose molecules across the proximal tubular cells of the kidney are reabsorbed as the transport mechanism ( cotransport with sodium ions) is saturated. This also increases the number of particles in the urine and it follows an osmotic diuresis.

• Disease in diabetology
• Disease symptom