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.
The largest lake in the United States on the basis of water volume is Lake Superior with a volume of 2,904 cubic miles (12,104 cubic kilometers). Lake Superior is the single named lake with the largest surface area in the United States at 31,700 square miles (82,103 square kilometers). However, as mentioned above, if you consider Lake Michigan and Lake Huron as a single lake, then Lake Michigan-Huron has the largest surface area at 45,410 square miles (117,611 square kilometers).