About blood glucose curves

Your veterinarian may want to make a blood glucose curve for your diabetic cat.

What is a blood glucose curve used for?

A blood glucose helps to determine:

  1. If and when the insulin given to your cat starts working.
  2. How efficient the insulin dose is at reducing the blood glucose level.
  3. How low your cat’s blood glucose falls and when this occurs.
  4. How long the insulin works in your cat.

This information is used to:

  1. Monitor the response to an insulin dose – especially in diabetic cat’s just starting treatment or after a change in insulin dose.
  2. Investigate diabetic cats that appear not to be responding to insulin treatment – sometimes after a period of stability


How is a blood glucose curve made?

  1. Your cat may be hospitalised for up to 24 hours.
  2. Food and insulin injections will be given according to the schedule you use at home.
  3. A blood sample will be taken prior to feeding and insulin dosing.
  4. Blood samples will then be taken every 2-4 hours for up to 24 hours.
  5. Blood glucose will be measured in each of these samples.
  6. The blood glucose levels are plotted against time to produce a curve. This curve indicates the changes that take place in blood glucose levels after insulin is injected.

Ideal blood glucose curve

Below is an example of how an ideal blood glucose would look in a stable diabetic cat.

Click on the thumbnail sketch for the full sized curve.

ideal blood glucose curve