laryngoscope is a medical instrument consisting of a handle and a detachable blade, used to view the larynx for diagnosis or to place a breathing tube. A 4-blade set typically includes different blade sizes, such as Miller and Macintosh blades, to accommodate various patient anatomies and procedures. The blades provide illumination and are designed to displace the tongue and soft tissues to reveal the vocal cords, helping in difficult intubations or to diagnose conditions like hoarseness.