超声联合血清Gastrin-17对儿童腹型IgA血管炎鉴别诊断的应用评估

Evaluation of ultrasonography combined with serum Gastrin-17 in differential diagnosis of abdominal IgA vasculitis in children

目的探究超声联合血清促胃液素-17(Gastrin-17)对儿童腹型IgA血管炎鉴别诊断的价值。方法选取该院于2020年6月至2022年12月收治的IgA血管炎患儿80例,其中腹型IgA血管炎45例(观察组),其他类型(无消化道症状)IgA血管炎35例(对照组)。研究腹型IgA血管炎的超声特点及Gastrin-17水平,分析Gastrin-17水平与紫癜症状评分之间的关系,并采用受试者工作特征(ROC)曲线分析超声、Gastrin-17对于儿童腹型IgA血管炎的诊断价值。结果观察组紫癜症状评分明显高于对照组(P<0.05),观察组血清Gastrin-17水平明显低于对照组(P<0.05),且通过Pearson相关分析显示,血清Gastrin-17水平与紫癜症状评分呈负相关(r=-0.758,P<0.001)。腹型IgA血管炎患儿超声结果显示,肠壁呈“面包圈”样改变,出现不同程度向心性全层增厚、回声减低,以黏膜下层增厚为主。ROC曲线分析显示,血清Gastrin-17诊断儿童腹型IgA血管炎的最佳截断值为2.91 pmol/L,曲线下面积为0.787(95%CI:0.685~0.888),灵敏度、特异度分别为75.56%(34/45)、74.29%(26/35)。超声联合Gastrin-17诊断儿童腹型IgA血管炎的灵敏度为97.78%(44/45),阴性预测率为95.65%(22/23),准确率为82.50%(66/80),较单独诊断明显提高(P<0.05)。结论腹型IgA血管炎患儿血清Gastrin-17处于低水平,且其超声结果显示肠壁呈“面包圈”样改变及黏膜下层增厚,超声联合Gastrin-17联合评估可有效鉴别诊断儿童腹型IgA血管炎。

Objective To study the value of ultrasonography combined with serum Gastrin-17 in differential diagnosis of abdominal IgA vasculitis in children.Methods A total of 80 children with IgA vasculitis admitted to the hospital from June 2020 to December 2022 were selected,including 45 cases of abdominal IgA vasculitis(observation group)and 35 cases of other types of IgA vasculitis(without gastrointestinal symptoms,control group).The ultrasonographic characteristics and Gastrin-17 level of abdominal IgA vasculitis were analyzed,and the relationship between Gastrin-17 level and purpura symptom score was analyzed.Receiver operating characteristic(ROC)curve was used to analyze the diagnostic value of ultrasonography and Gastrin-17 for abdominal IgA vasculitis in children.Results The symptom score of purpura in the observation group was significantly higher than that in the control group(P<0.001),while the serum Gastrin-17 level in the observation group was significantly lower than that in the control group.Pearson correlation analysis showed that serum Gastrin-17 level was negatively correlated with purpura symptom score(r=-0.758,P<0.001).Ultrasound images showed"doughnut"-like changes in the intestinal wall,with different degrees of central-thickness thickening and reduced echo,mainly submucosal thickening.ROC curve analysis showed that the cut-off value of serum Gastrin-17 in the diagnosis of abdominal IgA vasculitis in children was 2.91 pmol/L,the area under the curve was 0.787(95%CI:0.685-0.888),the sensitivity and the specificity were 75.56%(34/45)and 74.29%(26/35),respectively.The sensitivity of ultrasound combined with Gastrin-17 in the diagnosis of abdominal IgA vasculitis in children was 97.78%(44/45),the negative prediction rate was 95.65%(22/23),and the accuracy rate was 82.50%(66/80),which was significantly higher than those of single diagnosis(P<0.05).Conclusion Serum Gastrin-17 level is low in children with abdominal IgA vasculitis,and ultrasound imaging shows"doughnut"-like changes in the intestinal wall and thickening of the submucosa.Combined detection of the two could effectively differentially diagnose abdominal IgA vasculitis in children.