That's why I've gathered up ultrasound photos from various stages of pregnancy. Here you can either look ahead of your schedule and give yourself a crash course in telling the boys from the girls, or you can come back later and compare your own photos to those in the gallery. Girl Ultrasound Photos.
pulmonary function test (PFT), a procedure for determining the capacity of the lungs to exchange oxygen and carbon dioxide efficiently. There are two general kinds of respiratory function tests. One measures ventilation, or the ability of the bellows action of the chest and lungs to move gas in and out of alveoli.
They provide your physician needed information to help diagnose disease, measure the severity of lung problems, recommend treatments, and follow your progress. Most insurance carriers, Medicare and Medicaid cover the cost of your PFT. A PFT is performed to: 1  Evaluate how well your lungs and airways function.2  Diagnose certain lung disease, such as asthma or Chronic Obstructive Pulmonary Disease (COPD). 3  Evaluate a patientâs lung function before surgery.efore a Pulmonary Function test, it is important not to do anything that might disturb your lung function before your test. 1  Avoid smoking for several hours prior to your test. 2  Avoid heavy meals before your test. 3  Stop using inhalers, breathing treatments and sedatives for at least 4 hours prior to your test.