Pulmonary function tests can help tell how well your child's lungs are working or how well the lungs are responding to medicine. Read on for details.

Lung (pulmonary) function tests are breathing tests done to see how well your child’s lungs are working. They’re also used to see how well the lungs are growing and working in premature babies.

A blood test can be stressful for both you and your child. You can take steps to make the process easier. Tell your child that you will do what you can to make it go smoothly. Read on for tips that may help.

In children, it's not always easy to address sleep problems, and sleep disorders often go undiagnosed. How can you know when sleep is a problem for your child? This sheet explains general guidelines for how much sleep children need. It also describes signs of a problem with sleep and tips for improving it.

Help your child know what to expect if they need a sleep study.

Read on for details about common lab tests used to diagnose problems with the digestive system in children.

An upper endoscopy is a test that shows the inside of the upper gastrointestinal (GI) tract. This includes the esophagus, stomach, and the first part of the small intestine (duodenum). The healthcare provider can do a biopsy, check for problems, or remove objects. The test normally takes about 15 to 20 minutes.

A colonoscopy is a test that lets a health care provider look inside the colon and rectum. A sigmoidoscopy is a shorter form of this test. Read on for details.

A modified barium swallow is used to test your child's ability to swallow. It uses barium, a substance that makes organs show more clearly on X-rays. This test may be suggested if your child has problems swallowing food. Read on to learn more.

An upper GI series is an X-ray exam of the upper digestive tract. Here's what you should know when your child needs this exam.