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小儿反复呼吸道感染(RRTI)是指上、下呼吸道感染的次数:0～2岁小儿在7次、3次以上,3～6岁小儿在6次、2次以上,6岁以上小儿超过5次(此诊断标准中相邻两次感染的时距在7天以上,若上感次数不足可以加下感次数)。这样的小儿,我们称之为复感儿。 RRTI的病因尚未完全明了。除与肺、气管以及心脏先天性畸形,胃、食管返流等疾病有关外,还与机体的免疫功能有关,表现于:①复感儿血清免疫球蛋白大部分低于正常小儿,IgG亚类缺陷率达60.9％。②红细胞免疫功能低下,复感儿红细胞
Children with recurrent respiratory tract infections (RRTI) refers to the number of upper and lower respiratory tract infections: 0 to 2-year-old children in 7 times, more than 3 times, 3 to 6 years old children in 6 times, more than 2 times, more than 5 years old children over 6 years (This diagnostic criteria in the adjacent two infections in more than 7 days interval, if the number of times less than the flu can increase the number of flu). Such children, we call the complex sense of children. The etiology of RRTI is not fully understood. In addition to the lung, trachea and heart congenital malformations, stomach, esophageal reflux disease and other related, but also with the body’s immune function, manifested in: ① sera children immunoglobulin most of the lower than normal children, subclasses of IgG Defect rate of 60.9%. ② low immune function of red blood cells, children with complex red blood cells