The Random Plasma Glucose (RBS) test measures blood glucose levels at any time of the day, regardless of when you last ate. It is a quick screening tool for identifying potential diabetes or hyperglycemia and is often used in urgent situations.

Elevated RBS levels may indicate:

• Diabetes mellitus (type 1 or type 2)
• Prediabetes
• Stress hyperglycemia (e.g., due to acute illness, infection, or surgery)
• Other conditions like Cushing’s syndrome or pancreatitis

Low RBS levels may indicate:

• Hypoglycemia (caused by excessive insulin, fasting, alcohol use, or other factors)
• Adrenal insufficiency or severe malnutrition

Non-diabetic individuals:
Typically <140 mg/dL (7.8 mmol/L), though this depends on the individual and the timing of meals.

Potential diabetes indication:
If the RBS is ≥200 mg/dL (11.1 mmol/L) and accompanied by symptoms (e.g., excessive thirst, frequent urination), diabetes is highly suspected. Further testing (e.g., fasting glucose or HbA1c) is necessary for confirmation.

Normal result: Suggests no immediate concern, but additional factors (like symptoms or family history) should be considered.

Elevated result: May indicate diabetes or stress-related hyperglycemia. Confirmatory tests like fasting glucose, HbA1c, or an oral glucose tolerance test (OGTT) are recommended.

Low result: Suggests hypoglycemia; requires investigation of underlying causes and monitoring.

Sample Type

• Blood sample is collected using:
  • Venipuncture: From a vein, typically in the arm.
  • Capillary sample: From a fingertip, commonly used for point-of-care testing with glucose meters.