Sometimes bronchoscopy is used to treat lung problems. It may be done to insert a stent in an airway. An airway stent is a small tube that holds the airway open. It's used when a tumor or other condition blocks an airway. In children, the procedure most often is used to remove something blocking an airway.
Spanning the border from Minnesota into the Canadian provinces of Ontario and Manitoba, Lake of the Woods is an enormous body of water over 68 miles long, 59 miles wide, with 25,000 miles of shoreline-the world's longest lake shoreline.
At 137,700 acres (215 sq mi; 557 km2) it is the largest lake entirely within the state, covering an area of about 30 by 10 miles (50 by 15 km), with 88 miles (142 km) of shoreline, an average depth of 15.5 feet (4.7 m), and a maximum depth of 21 feet (6.4 m).