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Pyloroplasty
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Pyloroplasty is a surgery performed to widen the opening at the lower part of the stomach, also known as the pylorus.〔"Pyloroplasty." ''Pennmedicine.org''. Penn Medicine, 25 Oct. 2014. Web. 5 Oct. 2015.〕 When the pylorus thickens, it becomes difficult for food to pass through.〔 The surgery is performed to widen the band of muscle known as the pyloric sphincter, a ring of smooth, muscular fibers that surrounds the pylorus and helps to regulate digestion and prevent reflux (''see illustration).'' 〔“Pyloric Sphincter Function.” ''New Health Guide.'' N.p., n.d. Web. 13 Oct. 2015.〕 The widening of the pyloric sphincter enables the contents of the stomach to pass into the first part of the small intestine known as the duodenum.〔
== Applications ==
Pyloroplasty can be performed on a narrowed or thickened pylorus, but also on a normal pylorus.〔Kapoor, Vinay Kumar. "Pyloroplasty Technique." ''Medscape.com''. WebMD LLC, 17 Aug. 2015. Web. 6 Oct. 2015.〕 Pyloroplasty is used to treat those who have complications causing a blockage of the pylorus, commonly peptic ulcers.〔 It also can be performed on patients at high risk for gastric or peptic ulcer disease (PUD).〔"Pyloroplasty." ''Surgeryencyclopedia.com''. Advameg, Inc., n.d. Web. 5 Oct. 2015.〕 Pyloroplasty is almost never performed by itself; it is most commonly paired with another procedure like a vagotomy.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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