What does ASTD stand for? Definition of ASTD in the Abbreviations.com acronyms and abbreviations directory.
The most certain way to diagnose asthma is with a lung function test, a medical history, and a physical exam. However, it's hard to do lung function tests in children younger than 5 years. Thus, doctors must rely on children's medical histories, signs and symptoms, and physical exams to make a diagnosis. Doctors also may use a 4â6 week trial of asthma medicines to see how well a child responds.
Your asthma doctor may diagnose adult-onset asthma by: 1  Taking a medical history, asking about symptoms, and listening to you breathe. 2  Performing a lung function test, using a device called a spirometer to measure how much air you can exhale after first taking a deep breath.