Files stored in the UPD format are more commonly known as program update information files. These .upd files are text documents, and its content can be viewed by any text editing or word processing application. Users of Microsoft Windows-based systems can use the Microsoft Notepad application to open and edit these .upd text documents.
Croup (acute laryngotracheobronchitis) on X-ray with steeple sign. Croup, also called acute laryngotracheobronchitis is caused by viral infection of the upper airway usually parainfluenza virus or respiratory syncytial virus (RSV).
1 Physical examination: Listening to the lungs and heart, and looking at the veins in the neck, can give a doctor reason to suspect COPD or heart failure. 2  Chest X-ray: Heart failure may cause fluid in the lungs to be visible on a chest X-ray; in COPD, the lungs are usually clear.