How is hypoglycemia in a newborn baby diagnosed?
Diagnosis of neonatal hypoglycemia is done with a serum glucose test. It is a blood test that measures blood sugar in a newborn using a heel stick, an easy and minimally invasive way do blood work for newborns where blood is drawn from the heel of the foot.
What glucose level is neonatal hypoglycemia?
Neonatal hypoglycemia, defined as a plasma glucose level of less than 30 mg/dL (1.65 mmol/L) in the first 24 hours of life and less than 45 mg/dL (2.5 mmol/L) thereafter, is the most common metabolic problem in newborns.

Can glucose tolerance test diagnose hypoglycemia?
The oral glucose tolerance test (OGTT) is a widely accepted diagnostic procedure to evaluate patients suspected of having reactive hypoglycemia.
How do you assess for neonatal hypoglycemia?
What are the symptoms of hypoglycemia in a newborn baby?
- Shakiness.
- Blue tint to skin and lips (cyanosis)
- Stopping breathing (apnea)
- Low body temperature (hypothermia)
- Floppy muscles (poor muscle tone)
- Not interested in feeding.
- Lack of movement and energy (lethargy)
- Seizures.
What are 4 common causes of newborn hypoglycemia?

Risk factors include prematurity, being small for gestational age, maternal diabetes, and perinatal asphyxia. The most common causes are deficient glycogen stores, delayed feeding, and hyperinsulinemia. Signs include tachycardia, cyanosis, seizures, and apnea.
Why would a newborn baby have low blood sugar?
Sometimes babies have low blood sugar after they are born. Babies who are born early (premature) have high energy needs. But they don’t have a lot of energy stored up in their bodies. That’s why they are more likely to have low blood sugar.
What is normal newborn glucose level?
The normal range of blood glucose is around 1.5–6 mmol/l in the first days of life, depending on the age of the baby, type of feed, assay method used, and possibly the mode of delivery. Up to 14% of healthy term babies may have blood glucose less than 2.6 mmol/l in the first three days of life.
Why is oral glucose tolerance test not suitable for diagnosing hypoglycemia?
The GTT (glucose tolerance test) is of limited value in the diagnosis of reactive hypoglycemia, since normal levels do not preclude the diagnosis, abnormal levels do not prove that the patient’s other symptoms are related to a demonstrated atypical OGTT, and many people without symptoms of reactive hypoglycemia may …
What test is done for hypoglycemia?
If your doctor suspects hypoglycemia, you may have to fast until you start to have symptoms. They’ll test your blood glucose level at different times throughout the fast. To check for reactive hypoglycemia, you may have to take a test called a mixed-meal tolerance test (MMTT).
What to do if a newborn is hypoglycemic?
The immediate treatment for hypoglycemia is giving the baby a rapid-acting source of glucose such as mixture of glucose/water or formula as an early feeding if baby is able to take by mouth. If baby is not responding and has seizures IV fluids containing glucose is the best choice to raise the blood glucose quickly.
Is hypoglycemia curable in newborns?
Hypoglycemia in a newborn is treatable. However, without treatment, this medical condition can cause lasting damage. Parents and caregivers who notice symptoms of hypoglycemia must act quickly. A doctor may recommend giving sugar gel, providing more regular feeds, or supplementing breast milk with formula.
How is infant hypoglycemia treated?