1.   Cheney had angioplasty to widen an artery leading to his heart and physicians then inserted a stent in the artery to keep it open.

2.   Using laparoscopes, physicians can insert a slender tube into the body through a keyhole incision and direct it to the site of a tumor.

3.   When the eggs are ready to harvest, the donor is given anesthetics so that a physician can insert a needle and remove the eggs.

4.   Physicians inserted a stent to treat a narrowing in one artery segment, and said he should recover fully.