What is the Difference Between FBS RBS and GRBS?

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The main difference between Fasting Blood Sugar (FBS), Random Blood Sugar (RBS), and General Random Blood Sugar (GRBS) lies in the time and conditions under which the tests are performed, as well as their normal ranges. Here is a summary of the differences:

  • Fasting Blood Sugar (FBS): This test is carried out after a certain period of fasting, usually overnight. The normal range for FBS is 70-100 mg/dl.
  • Random Blood Sugar (RBS): This test is carried out at any time of the day, regardless of the person's fasting status. The normal range for RBS is 80-140 mg/dl.
  • General Random Blood Sugar (GRBS): Similar to RBS, this test is also carried out at any time of the day and does not require fasting. The normal range for GRBS is 80-140 mg/dl.

All three tests are used to measure the glucose or sugar level in a person's blood, and their values depend on the function of the hormone insulin, which controls the storage and release of blood glucose. High levels of FBS, RBS, or GRBS can lead to hyperglycemia, while low levels can result in hypoglycemia.

Comparative Table: FBS RBS vs GRBS

Here is a table summarizing the differences between Fasting Blood Sugar (FBS), Random Blood Sugar (RBS), and General Random Blood Sugar (GRBS):

Parameter Fasting Blood Sugar (FBS) Random Blood Sugar (RBS) General Random Blood Sugar (GRBS)
Meaning A test to determine glucose levels in blood after a certain period of fasting A test to determine glucose levels in blood of a non-fasting person at any time of the day Another name for RBS
Normal Range (mg/dl) 70 - 100 80 - 140 Same as RBS
Test Purpose Diagnose diabetes, monitor glucose levels, and evaluate insulin function Diagnose diabetes and monitor glucose levels in non-fasting individuals Same as RBS
Test Conditions Requires fasting for an extended period, usually overnight Can be performed at any time of the day on a non-fasting person Same as RBS

Please note that GRBS is another name for RBS and does not have separate criteria.