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1 .This is Scientific American 60-Second Science. I'm Cynthia Graber. Got a minute?
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2 .Medical devices like implanted arteries or external dialysis machines keep people alive.
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3 .But persistent problems exist.
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4 .Blood flowing through the tubes can form dangerous clots.
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5 .And bacteria that stick to surfaces could start infections.
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6 .Treatment for patients using such devices thus often includes anti-clotting agents such as heparin.
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7 .But such substances have their own risk: by interfering with clotting, they can cause potentially deadly bleeding.
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8 .Recently, researchers at the Wyss Institute for Biologically Inspired Engineering at Harvard University looked to the carnivorous pitcher plant for guidance.
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9 .The plant's structure includes wells with surfaces too slippery for insects to crawl out of.
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10 .Those surfaces inspired the development of a coating so slippery that it prevents blood and bacteria from sticking.
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11 .The team tested the coating on the interiors of tubes and catheters attached to pigs.
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12 .They demonstrated that the coating did not degrade, and that blood kept flowing without clotting, for eight hours.
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13 .Blood usually starts to clot in tubes in an hour.
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14 .The study is in the journal Nature Biotechnology.
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15 .The researchers also tested whether a gecko could latch onto the coating with its notoriously sticky footpads.
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16 .But not even the gecko could get a grip.
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17 .Thanks for the minute, for Scientific American's 60-Second Science. I'm Cynthia Graber.
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