Tiêu chảy tự giới hạn là rất phổ biến. Thông qua phân lỏng hoặc chảy nước mà không có đau bụng đã được tìm thấy xảy ra ở 4,3% của nam giới và 2,2% phụ nữ được khảo sát tại Bristol, Vương quốc Anh trong một khoảng thời gian 1 năm. Tiêu chảy mãn tính được cho là ảnh hưởng đến 5% dân số người lớn hàng năm ở Hoa Kỳ, và khoảng bệnh nhân nhập viện. | Chapter 7 Miscellaneous anorectal conditions Diarrhea 155 Fecal impaction 159 Ileoanal pouch anastomosis 161 Pilonidal sinuses 167 Rectal foreign bodies 169 This is trial version This is trial version 154 Chapter Diarrhea Epidemiology Self-limited diarrhea is extremely common. The passage of loose or watery stools without abdominal pain was found to occur in of males and of females surveyed in Bristol UK during a 1-year period. Chronic diarrhea is thought to affect 5 of the adult population annually in the United States and approximately 450 000 patients are hospitalized. Patients at risk People with diabetes celiac sprue pancreatic disorders or small intestinal disorders travelers to Third World countries HIV-infected patients people on antibiotics patients undergoing or having had radiation therapy patients who have had surgery of the stomach small intestine or colon and individuals receiving enteric formula feedings. A variety of medications and herbal preparations have laxative effects. Pathophysiology Diarrhea occurs when the normal absorptive mechanism of the small intestine and colon is overwhelmed by excessive fluid secretion and hypermotility. The overall result is the passage of multiple frequent stools. Diarrhea is most objectively defined as the passage of more than 200 mL 200 g of stool per day. Diarrhea can be divided into several categories which are outlined below together with common causes of each. Acute Symptoms lasting from several days to 4 weeks. The majority of cases of acute diarrhea are due to viral bacterial or parasitic infection. Chronic Symptoms lasting 4 weeks. A large number of conditions can result in the development of chronic diarrhea. Chronic diarrhea may be further divided into two main caL goiies osmouc diaunaa and seciiLoiy diaunea. This is trial version .
