What tests are needed to further define Hypoglycemia?

In most cases, a simple measurement of the blood sugar level by a machine at the bedside is all that is necessary. Sometimes a confirmation of the low measurement by the bedside machine will need to be performed. This is done by collecting a small amount of blood from the baby and sending it to the laboratory. In the rarer cases of severe and prolonged low blood sugar, blood levels of various hormones may be needed and may take several days to return.