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Everyone knows what heart surgery is, but most people don't know who runs the heart-lung machine that makes it possible. In this video, I talk with pediatric perfusionist Caleb Varner about what it's like to take over for a patient's heart and lungs during major surgery.
Ophthalmologists operate on tissue that's 4 microns deep, which is 1/20 the width of human hair. In this video, Dr. Sagar Rambhia explains how he stays calm performing this kind of microsurgery on patients who happen to be awake.
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