Test Name: RBS – Random Blood Sugar (Glucose Random)

Clinical Significance:
The Random Blood Sugar test measures glucose concentration in blood at a random time of the day, irrespective of the last meal. It is commonly used for screening and monitoring diabetes mellitus and for evaluation of patients with acute symptoms of hyperglycemia or hypoglycemia.

Reference Ranges (may vary by lab):

• Normal: 70 – 140 mg/dL (depending on last meal timing)

• Borderline: 141 – 199 mg/dL

• Diabetes: ≥200 mg/dL with classic symptoms of diabetes

Indications:

• Screening of undiagnosed diabetes

• Monitoring of known diabetic patients

• Evaluation of emergency cases with hyperglycemia or hypoglycemia

• Routine health check-up

Preparation:

• No fasting required.

• Sample can be taken at any time of the day.

• Same day reports

Test Name: FBS – Fasting Blood Sugar (Glucose Fasting)

Clinical Significance:
The fasting blood sugar test measures blood glucose after 8–10 hours of fasting. It is widely used for diagnosis and monitoring of diabetes mellitus. Persistent hyperglycemia indicates diabetes, while borderline results suggest impaired fasting glucose (pre-diabetes).

Reference Ranges (may vary by lab):

• Normal: 70 – 99 mg/dL

• Pre-diabetes (Impaired Fasting Glucose): 100 – 125 mg/dL

• Diabetes: ≥126 mg/dL (on two separate tests)

Indications:

• Screening for Type 1 and Type 2 Diabetes Mellitus

• Monitoring glycemic control in diabetic patients

• Evaluation of hypoglycemia

• Routine health check-up

Preparation:

• Patient should fast for at least 8–10 hours.

• Only water is allowed.

• Medications should be informed to the doctor/lab.