Vascular stent has been fully extended and the balloon catheter is being removed. Expanded stent keeps artery lumen open.

Vascular stent has been fully extended through the inflation of the balloon catheter. Lumen of artery has thus been widened.

Longitudinal section of atherosclerotic artery with balloon catheter having been inflated. Inflated balloon increases diameter of lumen.

Vascular stent has been fully extended and the balloon catheter has been deflated prior to removal. Expanded stent keeps artery lumen open.

Cross-sectional view of a coronary artery with atherosclerotic plaque buildup.

Schematic view showing an unexpanded balloon catheter in a cannula which in turn is in an artery.

Anterior view of the base of the aorta and aortic valve with the coronary arteries.

Anterior view of the base of the aorta and aortic valve with the cannula entering the coronary artery.

Longitudinal section of atherosclerotic artery with balloon catheter in place prior to inflation.

View from inside a cannula that has been passed through a coronary artery. A balloon catheter is being passed through the catheter. Erythrocytes can be seen.

Longitudinal section of atherosclerotic artery with balloon catheter having beenfurther inflated. Inflated balloon increases diameter of lumen.

Two types of laryngoscope blades are shown. (left) Straight and (right) MacIntosh. Used for inserting tracheal and breathing tubes.

Balloon catheters, types