Henry Bessemer was an inventor and engineer from England. Not only  did he develop the Bessemer process for steel manufacturing, but he  also designed a machine that could mâ¦ake bronze powder.
The head-tilt/chin-lift is the primary maneuver used in any patient in whom cervical spine injury is not a concern. The simplest way of ensuring an open airway in an unconscious patient is to use a head-tilt/chin-lift technique, thereby lifting the tongue from the back of the throat.
What is the narrowest part of the airway and where is it located? The narrowest part of the airway is the rima glottidis, which is the space found between the true vocal cords (vocal ligaments). This space changes shape when speaking, coughing, or breathing heavily.