home   |  site map   |   privacy  | contact     main line gastroenterology associates, p. C. Main line gastroenterology associates p. C. viagra blindness 2011 About us biographies office locations research endoscopy centers services procedures my patient page resources patient education diets procedure faq's general faq's forms useful links contact us       virtual colonoscopy virtual colonoscopy is an examination of the large bowel using computerized x-ray techniques, such as computed tomography (ct scan), or magnetic resonance imaging (mri). The purpose of the examination is to look for polyps or tumors in the large intestine. buy generic viagra It provides images of the colon but does not allow for biopsy or direct look. Description of the procedure like standard colonoscopy, virtual colonoscopy requires a bowel preparation to cleanse the colon. viagra canada This will usually require clear liquid diet and laxatives the day prior to the procedure. On the day of the examination, a tube is placed into the rectum and the colon is then filled with air or water at which time an abdominal-pelvic ct scan or an mri is performed. Because air or water is pumped into the colon, some cramping may result. Accuracy of virtual colonoscopy recently published studies suggest that virtual colonoscopy is almost as accurate as standard colonoscopy in finding large polyps, but probably not as accurate in finding small polyps. It is not useful for examining details of the lining of the colon. cheap generic viagra Need for follow-up standard colonoscopy if polyps are detected, or if there was inadequate bowel cleansing, conventional colonoscopy will still be needed to remove the polyps found, and to examine areas that were inadequately cleansed. In a recent large study, over half the people who had virtual colonoscopy needed to have a follow-up standard colonoscopy. viagra patent expiration date 2012 Reasons for the examination virtual colonoscopy should be considered for those individuals who have an obstruction in the colon that prevents standard colonoscopy. viagra patent expiration date 2012 It is not appropriate for individuals with family history of colon cancer, prior polyps, anemia, or other risk factors for having polyps. viagra over the counter toronto It is also not appropriate for individuals with diarrhea, rectal bleeding, or other conditions that may require direct examination of the lining of colon. It may be considered for screening in individuals with no digestive symptoms and low risk for colon polyps who would prefer to avoid the sedation given during standard colonoscopy in return for the risk of needing a second procedure. Conclusions at this time the american cancer society, the u. viagra patent expiration date 2012 S. viagra price list Multi-society task force on colorectal cancer, and the u. S. no prescription viagra pharmacies Preventive services task force have not recommended virtual colonoscopy for the purpose of screening for colorectal cancer. Patie. buy viagra online generic viagra


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