Overview: Sugar (F/R) Test

Sugar (F/R) is a blood test used to measure the level of glucose (sugar) in the blood to help screen, diagnose, and monitor diabetes mellitus.

What the Test Includes In Sugar (F/R) Test

• Fasting Blood Sugar (F): Measures blood sugar after 8–10 hours of fasting
• Random Blood Sugar (R): Measures blood sugar at any time of the day, regardless of meals

What Is Purpose of the Sugar (F/R) Test

• Detect high or low blood glucose levels
• Diagnose diabetes and pre-diabetes
• Monitor blood sugar control in diabetic patients

What Is Normal Reference Values For Sugar (F/R) Test

• Fasting: 70–99 mg/dL
• Random: < 140 mg/dL

What Is Procedure Of Sugar (F/R) Test

1️⃣ Patient Preparation

• Fasting Sugar (F):
• Patient fasts for 8–10 hours (only water allowed).
• Random Sugar (R):
• No fasting required.

2️⃣ Blood Sample Collection

• Patient is asked to sit or lie comfortably.
• A tourniquet is tied around the upper arm.
• The skin is cleaned with spirit/alcohol.
• Blood is drawn from a vein (usually in the arm) using a sterile needle.
• Sample is collected in a fluoride vial (prevents glucose breakdown).

3️⃣ Laboratory Analysis

• Blood sample is sent to the lab.
• Glucose level is measured using:
• GOD-POD method or
• Automated biochemistry analyzer

4️⃣ Reporting

• Result is reported in mg/dL
• Values are interpreted as normal, high, or low

🧫 Time Taken

• Blood collection: 2–3 minutes
• Report availability: Same day / few hours