Show pageBacklinksCite current pageExport to PDFBack to top This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong. Blockage of the upper airway occurs when the upper breathing passages become narrowed or blocked, making it hard to breathe. Areas in the upper airway that can be affected are the windpipe (trachea), voice box (larynx), or throat (pharynx). upper_airway_obstruction.txt Last modified: 2024/06/07 02:59by 127.0.0.1