A laryngoscope blade is a medical device used to examine the larynx, or voice box. It's a long, thin tube with a light and a lens or small video camera attached to the end. The laryngoscope is inserted into the throat through the mouth or nose. Laryngoscope blades are classified into two types: curved and straight. The Macintosh blade is the most common curved laryngoscope blade, while the Miller blade is the most common straight blade. Lowest prices on laryngoscope blade.