We know that hypoglycemia is less 70 mg/dl and hyperglycemia is greater than 200mg/dl. But from what method exactly are we measuring these values because there are several different methods. Capillary blood, glucose fasting, glucose tolerance and glucose 2 hour postprandial. I'm assuming it's the capillary test.
The best diagnostic test currently recommended by the ADA is actually an HbA1c.
Other diagnostic tests are an 75g OGTT, an 8hr fasting glucose, or a random glucose >200 in a classically symptomatic pt.
Your welcome for doing your homework faggot
The glucometer you pictured gets its blood from a fingerprick. I think that's capillary blood (I'm a diabetic not a person who knows biology). That shows the present glucose levels so it will detect both forms of diabetes if they're at the point where blood sugars are consistently high. If someone comes into a hospital showing symptoms of hyperglycemia they use a glucometer and it detects it. A normal human eating normal amounts of food will have a blood sugar between 5 and 8 mmol/L. A diabetic's will get much higher because the body doesn't start trying to get rid of glucose through piss until around 12 mmol/L and this isn't particularly effective.
There's another test called "Hemoglobin A1c" that shows the average glucose over several months. Diabetics get this to evaluate how well controlled they are. It can also detect early signs of type 1 and 2 diabetes that a glucometer can miss because the person's blood sugar is normal at the time of testing.