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If you’re having any kind of anesthesia, you must be NPO or there’s a risk of contacting pneumonia or worse because you could vomit and aspirate into your lungs, and stomach acid in your lungs is extremely damaging. Also, the Dr needs to be able to see the walls of the intestines, and having a lot of fecal matter stuck to the sides of your colon blocks the dr’s view of what s/he needs to see. This is why you need to only consume clear liquids (anything you can see through at room temperature, including popsicles, clear broths, and jello), and to follow your prep instructions precisely. If you don’t, you may go thru all that trouble for nothing because the dr won’t be able to see and will make you come back and do it right. (Source:surgical RN with extensive GI experience)

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Pamela Seery

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11mo ago

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