A blood sugar chart allows diabetics to track their blood sugar levels, Healthline reports. Columns on the chart include headings for tracking the date, target readings, and before-meal and after-meal readings. Patients note on the chart any medications taken and other factors that may affect results.
Readings on the chart refer to blood sugar levels taken with a blood sugar meter, notes Healthline. Normal readings vary between 70 and 130 milligrams per deciliter of blood before meals. Two hours after meals, normal blood sugar levels should be at or below 180 milligrams per deciliter. Levels are dangerously high from 180 milligrams per deciliter and higher. Blood sugar readings are dangerously low from 50 milligrams per deciliter and lower.
Diabetics should chart blood sugar levels consistently, says Healthline. Mealtimes represent one of the easiest ways to track patterns during blood sugar management. Certain medicines alter blood sugar levels, and changes in taking medicine can produce different blood sugar readings than before. Patients can record other factors that may change blood sugar readings such as activity levels, infections and illnesses.
Diabetics can chart blood sugar readings on a printable chart, in a notebook or with a smartphone application, according to WebMD. A chart helps patients and their doctors manage diabetes before permanent damage occurs in the kidneys, eyes and nervous system.