血乳酸在脓毒症患儿病情及预后评价中的意义

Value of blood lactic acid in evaluating disease severity and prognosis in children with sepsis

摘要:

目的 探讨脓毒症患儿血乳酸水平对病情严重程度和预后的评价作用。方法 收集脓毒症患儿484例,其中普通脓毒症组310例、严重脓毒症组105例、脓毒症休克组69例,治疗前测动脉血乳酸值,对乳酸>2 mmol/L的脓毒症休克患儿,收集其早期液体复苏后血乳酸复查值。结果 随脓毒症严重程度增加,血乳酸值逐渐增加。ROC曲线分析发现,区别脓毒症休克和非脓毒症休克的血乳酸值为2.25 mmol/L时,其诊断灵敏度为82.6%,特异性为79.8%。乳酸≤1 mmol/L、乳酸~2 mmol/L、乳酸~4 mmol/L和乳酸>4 mmol/L患儿的病死率分别为8.5%、9.4%、27.2%、67.6%,乳酸>4 mmol/L的死亡风险为乳酸≤1 mmol/L的22.4倍。治疗前血乳酸>2 mmol/L的脓毒症休克患儿复苏后血乳酸水平≤2 mmol/L和>2 mmol/L的病死率分别为33.3%、69.2%。结论 血乳酸可作为脓毒症患儿病情严重程度及预后的评价指标,血乳酸值2.25 mmol/L对脓毒症休克具有较高的诊断价值;早期复苏使血乳酸水平恢复至正常可改善脓毒症休克患儿的预后。

Abstract:

Objective To investigate the value of blood lactic acid (BLA) in evaluating disease severity and prognosis in children with sepsis. Methods A total of 484 children with sepsis were enrolled and divided into common sepsis group (n = 310), severe sepsis group (n = 105), and septic shock group (n = 69). BLA level was measured before treatment, and the results of BLA re-examination after early fluid resuscitation were collected for children with septic shock and a BLA level of >2 mmol/L. Results The BLA level increased with the increasing severity of sepsis. The analysis of the receiver operating characteristic curve showed that the cut-off value of BLA for the diagnosis of septic shock was 2.25 mmol/L, with a sensitivity of 82.6% and a specificity of 79.8%. The fatality rates in the BLA ≤1 mmol/L, BLA 1.1-2 mmol/L, BLA 2.1-4 mmol/L, and BLA >4 mmol/L groups were 8.5%, 9.4%, 27.2%, and 67.6%, respectively, and the risk of death in the BLA >4 mmol/L group was 22.4 times that in the BLA ≤1 mmol/L group. In children with septic shock who had a BLA level of >2 mmol/L before treatment and whose BLA levels were ≤2 mmol/L or >2 mmol/L after resuscitation, the fatality rates were 33.3% and 69.2%, respectively. Conclusions BLA can be used to evaluate disease severity and prognosis in children with sepsis, and a BLA level of 2.25 mmol/L has a high value in diagnosing septic shock. Early resuscitation helps BLA level return to normal and can improve the prognosis of children with septic shock.