Diagnosis of Bronchopulmonary Dysplasia
Arterial blood gases (ABGs) measure the amount of oxygen and carbon dioxide in your baby's blood. Blood is usually taken from an artery in your baby's wrist.
Blood tests may be needed. Blood tests give healthcare providers information about how your baby's body is working.

A chest x-ray is a picture of your baby's lungs and heart. It can help healthcare providers diagnose your baby's condition, or plan or monitor treatment.

A CT scan , or CAT scan, is a type of x-ray that uses a computer to take pictures of your baby's lungs. He may be given a dye before the pictures are taken to help healthcare providers see the pictures better. Tell the healthcare provider if he has ever had an allergic reaction to contrast dye.
An echocardiogram (echo) uses sound waves to show pictures of your baby's heart on a monitor. The echo can show the size of the heart, how well it pumps, and how well blood flows through it.

A ventilation (V) and perfusion (Q) test is also called a VQ or VP scan. A VQ scan is a 2-part test that takes pictures of your baby's lungs. During the perfusion part of the test, dye is injected into your baby's blood vessels. Pictures are taken to see how blood flows in his lungs. During the ventilation part of the test, your baby will breathe in a type of gas. Pictures are taken to see how well his lungs take in oxygen.