Tracking

An electronic pointing device that incorporates a rotatable ball designed to detect motion of the ball in two dimensions.

A 2-inch- to 3-inch-long curved metal or plastic tube placed in a surgically created opening (tracheostomy) in the windpipe to keep it…

Bleeding from the tracheostomy site.

A 0.5-inch- to 1.5-inch-long plastic tube placed in a surgically created opening (tracheostomy) in the windpipe to keep it open.

Surgery to create an opening (stoma) into the windpipe. The opening itself may also be called a tracheostomy.

A congenital or acquired abnormality of the wall of the trachea. In congenital cases, there is lack of rigidity in the cartilage…