Glucose is normally reabsorbed by the kidneys and not present in urine.

When blood glucose exceeds the renal threshold (~180 mg/dL), glucose spills into urine (glycosuria).

The RUS test checks for glucose at any time of the day, regardless of meals.

Clinical uses include:

Screening for diabetes mellitus.

Monitoring glycemic status in known diabetics.

Detecting renal threshold abnormalities.

Less sensitive than blood glucose tests, but useful in basic screening and follow‑up.

Analyte: Glucose in urine (qualitative or semi‑quantitative).

Normal Result: Negative (no glucose detected).

Abnormal Findings:

Positive RUS: Indicates hyperglycemia and possible diabetes.

Trace to high levels: Reflect severity of glycosuria.

Clinical Use:

Provides a simple, non‑invasive screening tool for diabetes.

Helps guide further testing with blood glucose or HbA1c.

Supports monitoring of glycemic control in follow‑up care.