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October 14, 2009 During death, oxygen is a double-edged swordPosted: 11:55 AM ET
By John Bonifield In college, I spent a summer in the Caribbean on an archaeology excavation. I remember submerging myself as deeply as I could in the ocean. I'd hold my breath as long as possible to admire the stunning underwater views of a shallow reef just off the beach at the site we were unearthing. I could never go more than about 45 seconds before surfacing for air. My lungs would burn as I hit the top of the water, gasping. You probably know the feeling, too, if you've ever tried to hold your breath for as long as possible. Two or three minutes isn't unheard of for a lot of people. Expert breath-holders can go as long as seven minutes. For Dr. Sanjay Gupta's upcoming documentary, "Another Day: Cheating Death," we've been taking a closer look at the human capacity to store oxygen. As it happens, oxygen is a double-edged sword when we die. Of course, we need it to sustain ourselves, but when a person's heart stops, the process of death is triggered. The body is designed to die, and to finish itself off; more oxygen is not what it wants. Get a cardiac arrest patient breathing again and you suddenly cheat death's plan. The body isn’t anticipating a new infusion of oxygen, and as the oxygen hits the cells and they begin to recover, they produce toxic molecules that are destructive. Science is discovering innovative ways to mitigate the damage. Cooling patients down after a cardiac arrest seems to help. Chilled, their bodies can recover with less oxygen. New CPR techniques are also being utilized to keep the oxygen that's already in a victim's blood pumping through the body. The concept is fascinating, and to make the point on television, we decided to spotlight synchronized swimmers. Their ethereal underwater dance is gorgeous to witness. They can remain submerged because there's a lot more oxygen in their blood than you might think, and they've trained themselves to utilize it efficiently. The synchronized swim team at Ohio State University is one of the best in the nation. You'll see them featured in our program at 8 p.m. this Saturday and Sunday on CNN. When I visited the swimmers to watch a practice, they told me that although their routines sap them of air and energy, the performances actually help them to stay under longer. All that movement distracts them from thinking about how long they've gone without a breath. When I asked them to try it without moving, they still managed - impressively - some of them for more than two minutes - but it was harder, they said. Their trick: They went through the alphabet, letter by letter, associating words with each one until they could go no longer and had to surface for air. Watch “Another Day: Cheating Death” at 8 and 11 p.m. ET Saturday and Sunday. Posted by: John Bonifield - CNN Medical Producer |
Get a behind-the-scenes look at the latest stories from CNN's chief medical correspondent, Dr. Sanjay Gupta, and the CNN Medical Unit producers. They'll share news and views on health and medical trends -- info that will help you take better care of yourself and the people you love. Editor's Note
Medical news is a popular but sensitive subject rooted in science. We receive many comments on this blog each day; not all are posted. Our hope is that much will be learned from the sharing of useful information and personal experiences based on the medical and health topics of the blog. We encourage you to focus your comments on those medical and health topics and we appreciate your input. Thank you for your participation. @sanjayguptacnn: big day for health care. biggest I have seen in my lifetime. vote at 1a. I will be co anchoring 10p - 2a on @cnn. will cover it all.
Updated: Sun, 20 Dec 2009 21:50:32 +0000 @sanjayguptacnn: http://twitpic.com/tylm4 - was such an honor to have the queen of morning tv come to my book party. joan lunden -- looks great!
Updated: Fri, 18 Dec 2009 02:22:32 +0000 @sanjayguptacnn: http://twitpic.com/tylja - spent the evening with @kingsthings and @deepakchopra. fascinating chat!
Updated: Fri, 18 Dec 2009 02:22:08 +0000 Recent Posts
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