It's lecture notes monitoring grbs introduction: blood glucose monitoring is way of testing the concentration of glucose in the blood (glycemia). particularly, The random blood sugar or RBS test is prescribed mainly to check the level of sugar or glucose in the blood for diabetes diagnosis. The key difference between FBS RBS and GRBS is that FBS (fasting blood sugar) is a test carried out after a certain time period of fasting, usually overnight, while RBS (random blood sugar) and GRBS (general random blood sugar) are tests carried out at any time of the day without fasting. The body requires glucose for energy. GRBs are short-lived bursts of gamma-ray light, the most energetic form of light. GRB emits more energy in a few seconds than our Sun will emit i n its lifetime and has t wo distinct emission phases: the short-lived prompt emission (the initial burst phase that emits gamma-rays), followed by a long-lived multi-wavelength afterglow phase.