Endotracheal tubes with intubation direction control means

Claim 1

In an endotracheal tube made of water-proof plastic material having a distal end portion, a proximal end portion, a normally curved central body portion integrally joining the distal end portion to the proximal end portion, a primary lumen comprising the major cross-sectional area of the tube, a balloon cuff carried upon the distal end portion, a secondary lumen within the wall of the tube and an inflation tube fixed to the proximal end of said secondary lumen for introduction of fluid therein, said secondary lumen discharging near its distal end into said balloon cuff for inflation thereof, the improvement which consists of intubation direction control means which comprises: a tertiary lumen within the wall of said tube that extends along the inside of the curve in said central body portion, an opening into said tertiary lumen through the wall of said tube in the proximal end portion of said tube, a filament extending through said opening into and along said tertiary lumen to the distal end thereof, a weldment fixing the distal end of said filament to the distal end of said tube, said filament being knotted at said weldment, and pull means on the proximal end of said filament external of said tube, said filament being moveable in said tertiary lumen relative to said tube along its entire length proximal of said weldment thereby tension applied to said filament may produce bending of said tube greater than said normally curved condition.