检测４７例ＲＲＴＩ患儿铁营养状况、外周血Ｔ细胞亚群、血清ＩｇＧ亚类等。结果表明，ＲＲＴＩ患儿缺铁发生率为７８．７２％，其中约％为隐性缺铁；ＲＲＴＩ组ＣＤ＋４细胞百分率、Ｔ细胞增殖功能明显降低，血清ＩｇＧ亚类缺陷检出率为３６．１７％，以ＩｇＧ４，ＩｇＧ１缺陷居多。ＳＦ、ＦＥＰ与ＣＤ＋４细胞、ＩｇＧ亚类间存在显著相关关系。提示ＲＲＴＩ多伴有铁营养不足；铁缺乏可能通过损害Ｔｈ细胞功能而导致ＩｇＧ亚类缺陷，引起ＲＲＴＩ发作。 Forty-seven patients with RRTI were examined for iron status, peripheral T-cell subsets, and serum IgG subclasses. The results showed that the incidence of iron deficiency in patients with RRTI was 78.72%, of which about% of the patients were recessive iron deficiency. The percentage of CD + 4 cells and the proliferation of T cells in RRTI group were significantly decreased, and the detection rate of IgG subclass defects was 36.17 %, With IgG4, IgG1 majority of defects. There was a significant correlation between SF, FEP and CD + 4 cells and IgG subclasses. Suggesting that RRTI often accompanied by iron deficiencies; iron deficiency may damage IgG subclass damage caused by Th cell function, causing RRTI attack.