A blood glucose chart is a log used to record blood sugar levels, according to the American Diabetes Association. Blood sugar monitoring is considered the primary tool in effective diabetes management. Some blood glucose charts are in book form, while others, like the ADAs Diabetes 24/7 program, are online.
Blood sugar levels should be recorded on the log several times a day, although the exact number of times varies by person, according to WebMD. Blood sugar levels are, however, commonly recorded before meals, before driving, at bedtime and when low blood sugar levels are suspected.
Blood sugar levels are tested using a blood sugar meter and test strip. These usually can be purchased at a local pharmacy, according to WebMD. The most common blood glucose meters work using blood from a person's fingertip. The person pricks a finger with a lancet and then squeezes a drop of blood on a test strip. The strip is then placed inside the meter to check the results.
Newer blood sugar meters can test blood from other areas, such as the thigh, forearm, base of the thumb or upper arm, according to WebMD. However, blood taken from the fingertip shows changes in blood sugar levels faster than blood taken from other sites. As a result, there can be differences in the blood sugar levels recorded from the different sites.