Punctual blood samples
The term punctual blood samples applies when a limited number of blood samples are taken at different intervals during the day. A regular glucose curve would require blood sampling every 1 to 2 hours for a period of 12–24 hours.
When should punctual blood samples be taken?
The first blood sample should be taken early in the morning prior to the first meal and insulin injection. The second blood sample should be taken approximately 4 hours later. When a rapid metabolism is suspected, it can be taken earlier. If the dog is injected twice a day, blood sampling should be done before each meal.
If slight hypoglycemia or hyperglycemia is detected but all other parameters suggest improvement and do not suggest instability (urine, appetite, water uptake, general condition), the dose likely does not require adjustment. To be certain, the tests can be repeated the next day. If the results confirm that there is reason for concern, a serial blood glucose curve should be made before the insulin dose is adjusted.
Caution: It is impossible to differentiate a Somogyi overswing from rapid metabolism or resistance to insulin with only a few blood samples.