Abstract: A method and apparatus for projecting an image of a surgical field along an optical path to intersect a display screen which is nonperpendicular to the optical path and adjacent the surgical field. A video projector system and accompanying optics impart at least one of a tilted focal plane or depth of focus to the projected image. The optical path of the projected image is located adjacent the surgical field. A sterilizable display screen is located in the optical path adjacent the surgical field so that a normal to the screen is noncoincident with the optical path and the projected image on the screen is of constant focus across the screen.

Abstract: A surgical apparatus for manipulating body tissue includes a handle member consisting of a frame, a self contained fluid dispenser having a chamber for storing a supply of fluid and a plunger reciprocally moveable within the chamber for dispensing the fluid, and a trigger operatively connected to the plunger and moveable to cause corresponding movement of the plunger. The apparatus also includes a generally elongated member connected to the handle member and an inflatable member supported at the distal end portion of the elongated member in fluid communication with the fluid dispenser. A method for performing a tracheostomy with the apparatus is also disclosed.

Abstract: A method and apparatus for projecting an image of a surgical field along an optical path to intersect a display screen which is nonperpendicular to the optical path and adjacent the surgical field. A video projector projects the image along the optical path through a tilted projection optic or compensator, and mirrors locate the optical path adjacent the surgical field. A sterilizable display screen is located in the optical path adjacent the surgical field so that a normal to the screen is noncoincident with the optical path and the projected image on the screen is of constant focus across the screen.