脓毒性休克患儿外周血淋巴细胞亚群的动态变化及临床意义

目的：探讨脓毒性休克(septic shock,SS)患儿外周血淋巴细胞亚群(总淋巴细胞、CD3＋T、CD4＋T、CD8＋T、CD19＋B、CD56＋NK)计数的变化特点及对预后的影响。方法检测 SS 重度组25例、SS轻度组24例入院时的外周血淋巴细胞亚群,并与同期健康体检小儿(正常对照组)25例进行比较分析。SS 重度组、轻度组于入院后第3、8天动态监测以上指标,同时记录病情变化和预后转归,并根据 SS 重度组转归分为死亡组与存活组,比较上述指标。结果入院时 SS 重度组、轻度组的淋巴细胞各亚群计数与正常对照组比较均有明显降低,三组相比差异具有显著性(P ＜0.05)。入院第3天,SS 轻度组的 CD4＋T、CD3＋T、总淋巴细胞计数较入院时有显著升高(P ＜0.05)；SS 重度组除了 NK 细胞外,其余淋巴细胞亚群均较入院时显著降低(P ＜0.05)。入院第8天,SS 轻度组的 CD4＋T 计数与正常对照组比较已无显著差异(P ＞0.05)；SS 重度组的 CD4＋T、CD3＋T、总淋巴细胞计数较入院时有显著升高,但与正常对照组比较差异仍有统计学意义(P ＜0.05),其余淋巴细胞亚群计数有所上升。SS 患儿重度组5例死亡(死亡组)均发生在入院后2～5 d,与其余生存的20例(存活组)相比,两组入院时的淋巴细胞各亚群计数比较无显著差异,死亡组入院第3天的淋巴细胞各亚群计数值明显降低,与存活组同期存在显著差异(P ＜0.05)。结论SS 患儿外周血淋巴细胞各亚群计数值越低,病情越严重,持续低水平提示死亡风险大；经过治疗,病情有效控制者首先表现为 CD4＋T、CD3＋T、总淋巴细胞计数上升,尤其是 CD4＋T。因此,动态监测 SS 患儿的淋巴细胞亚群对判断病情的严重程度、疗效、预后具有较高临床价值。

The clinical study of dynamic detection of lymphocyte subsets in children with septic shock

Objective To investigate the dynamic changes of lymphocyte subsets (lymphocyte count, CD3 +T,CD4 +T,CD8 +T,CD19 +B,CD56 +NK)in children with septic shock.Methods Peripheral blood lymphocyte subsets were analysed in 25 cases with severe septic shock and 24 cases with mild septic shock on day 1 ,3,8,and compared with those of 25 healthy volunteers.Children with severe septic shock were divided in-to survival group and dying group according to the outcome.The detection data were compared.Results In the first day of admission,peripheral blood lymphocyte subsets in children with septic shock decreased significantly compared with the normal children,and there was significant difference in the three groups(P <0.05 ).In the third day of admission,children with mild septic shock had statistical increase of CD4 +T,CD3 +T and lympho-cyte count(P <0.05),and children with severe septic shock had statistical decrease of lymphocyte subsets ex-cept CD56 +NK.In the eighth day of admission,children with mild septic shock had no significant difference in CD4 +T lymphocyte count compared with control group(P >0.05),but children with severe septic shock had statistical increase of CD4 +T,CD3 +T and lymphocyte count(P <0.05).There were 5 cases died who had se-vere septic shock in day 2 to day 5 after admission.The count of lymphocyte subsets were detected significantly lower in dying group than survival group in the third day of admission(P <0.05).Conclusion The continuous low level of lymphocyte subsets indicates bad outcome.The patientˊs condition improved with increase of CD4 +T,CD3 +T,lymphocyte count.CD4 +T is the most sensitive.Dynamic detection of lymphocyte subsets in the pe-ripheral blood of children with septic shock is of great clinical significance in judging the severity of disease and cura-tive effect.