目的 通过公共数据库筛选急性肺损伤（ALI）及急性呼吸窘迫综合征（ARDS）相关分子标志物,并探索其临床意义。方法 利用基因表达综合数据库（GEO）中有关ALI/ARDS基因表达芯片研究的两个数据集GSE76293和GSE10474,通过STRING网站和Cytoscape软件对差异基因进行蛋白互作网络分析并筛选ALI/ARDS相关关键基因。采用A549细胞构建ALI模型,并通过转录组测序验证关键基因在细胞中的表达差异情况。结果 2个GEO数据集中共筛选出共同上调基因27个,共同下调基因26个。主要参与抗原加工和外源抗原递呈、免疫受体活性调节、内质网膜构成等生物学功能,且与抗原加工、细胞分化等信号通路有关。蛋白互作网络分析共筛选出10个ALI/ARDS相关关键基因,分别为CD4、HLA-DQB1、CD74、HLA-DRA、FCGR2B、TOR1A、RELA、NME8、RNF19B、RHOB。细胞转录组测序结果显示,关键基因的上调或下调特征及表达差异情况与GEO数据集分析结果一致。结论 CD4等关键基因可能参与ALI/ARDS发生、发展的生物学过程,是ALI/ARDS临床诊断及预后预测的潜在个体化分子标志物。

Objective To identify molecular biomarkers associated with acute lung injury（ALI）/ acute respiratory distress syndrome（ARDS）and to explore their clinical significance with public databases. Methods Two datasets GSE76293 and GSE10474 in Gene Expression Omnibus（GEO）database for ALI/ARDS gene expression chip study were used to screen genes with significant differences in both datasets．The protein-protein interaction（PPI）analysis of co-expression genes was performed based on the STRING website and Cytoscape software,and then key genes related to ALI/ARDS were identified with cytoHubba method．The ALI model was constructed using A549 cells cultured in vitro,and the expression differences of key genes in the cells were verified by RNA sequencing. Results A total of 27 up-regulated genes and 26 down-regulated genes were screened in both the two GEO datasets with Venn Diagramm．These co-expression genes were mainly involved in biological functions such as antigen processing and presentation of exogenous peptide antigen,immune receptor activity,integral component of lumenal side of endoplasmic reticulum membrane and were related to signal pathways such as antigen processing and cell differentiation．A total of 10 key genes（CD4,HLA-DQB1,CD74,HLA-DRA,FCGR2B,TOR1A,RELA,NME8,RNF19B,RHOB）related to ALI/ARDS were identified． The results of cell RNA sequencing showed that the up-regulated or down-regulated characteristics and expression differences of key genes were consistent with the results of GEO datasets. Conclusions Several key genes identified in this study may be involved in the biological process of ALI/ARDS development,and may be potential individualized molecular markers for clinical diagnosis and prognosis prediction of ALI/ARDS．

目的 探讨俯卧位通气在脓毒症合并急性肺损伤患儿的应用效果。方法 选取泉州市儿童医院2020年9月—2023年9月收治的72例脓毒症合并急性肺损伤患儿,应用抽签法将其分为观察组与对照组,均为36例。对照组患儿实施常规仰卧位机械通气与对应护理,观察组患儿在常规护理基础上增加俯卧位通气与对应护理。对比两组患儿机械通气时间,干预前和干预3 d后气道平台压和心率水平,动脉血二氧化碳分压（PaCO₂）、动脉血氧分压（PaO₂）,并计算动脉血氧分压与吸入气中的氧浓度分数比值（PaO₂/FiO₂）,评价两组患儿预后及不良事件发生情况。结果 观察组机械通气时间明显低于对照组（P<0.05）,干预后两组患儿气道平台压、心率均降低,且观察组低于对照组（P<0.05）;干预后两组患儿PaO₂/FiO₂、PaO₂水平升高,观察组高于对照组,PaCO₂降低,观察组低于对照组（P<0.05）;干预后两组患儿全身性感染相关性器官功能衰竭评分（SOFA）、急性生理和慢性健康状况评分Ⅱ（APACHEⅡ）评分均降低,观察组低于对照组（P<0.05）;两组患儿呼吸机管路折管、管路滑脱、压力性损伤等不良事件发生率对比差异无统计学意义（P>0.05）。结论 俯卧位通气在脓毒症合并急性肺损伤患儿的应用效果显著,可降低患儿气道平台压及心率,缩短机械通气时间,改善患儿通气功能,有助提升预后水平。

Objective To explore the application effect of prone position ventilation in children with sepsis complicated with acute lung injury．Methods From September 2020 to September 2023,72 children with sepsis and acute lung injury admitted to Quanzhou Children's Hospital were selected and divided into observation group and control group by drawing lots,both with 36 cases．The children in the control group received routine supine mechanical ventilation and corresponding nursing,and the children in the observation group added prone ventilation and corresponding nursing on the basis of routine nursing．By comparing the duration of mechanical ventilation,airway plateau pressure and heart rate level,PaCO₂,PaO₂,PaO₂/FiO₂,the prognosis and occurrence of adverse events in the two groups were evaluated．Results The mechanical ventilation time in the observation group was significantly shorter than that in the control group（P<0.05）．After intervention,the airway plateau pressure and heart rate levels of the two groups of children decreased,and the observation group was lower than the control group（P<0.05）．After the intervention,the levels of PaO₂/FiO₂ and PaO₂ in the two groups of children increased,with the observation group higher than the control group,while the level of PaCO₂ was lower,with the observation group lower than the control group（P<0.05）．After the intervention,the SOFA and APACHE II scores of the two groups of children decreased,and the observation group was lower than the control group（P<0.05）．There was no difference in the incidence of adverse events such as ventilator tube folding,tube slip and pressure injury between the two groups（P>0.05）．Conclusions The application of prone position ventilation in children with sepsis combined with acute lung injury has a significant effect,which can reduce airway plateau pressure,lower heart rate,shorten mechanical ventilation time,improve ventilation function,and assist in improving prognosis．

目的 观察阶梯式呼吸管理策略在改善感染性休克伴急性肺损伤（ALI）患者中的价值。方法 纳入我院2019年1月—2020年12月收治的感染性休克伴ALI患者共146例为研究对象,数字表法随机分为观察组（73例）与对照组（73例）。对照组常规护理方案,观察组阶梯式呼吸管理,对比干预前后患者心肺功能的差异。结果 观察组平均动脉压、PaCO₂水平低于对照组,心脏指数、中心静脉压、血管外肺水指数、PaO₂与氧合指数高于对照组（P<0.05）;观察组复苏成功率与临床总有效率高于对照组,复苏时间与呼吸平稳时间低于对照组（P<0.05）;观察组气管切开率、有创呼吸机使用率及呼吸机相关性肺炎与气道并发症发生率均低于对照组（P<0.05）。结论 感染性休克并急性肺损伤患者建立阶梯化呼吸管理策略能够显著改善患者的心肺功能,提高临床复苏效果,降低相关并发症风险。

Objective To observe the value of stepwise respiratory management strategy in improving patients with septic shock and acute lung injury（ALI）．Methods A total of 146 patients with septic shock and ALI treated in our hospital from January 2019 to December 2020 were included as the research objects．They were randomly divided into observation group（73 cases）and control group（73 cases）by digital table method．The control group received routine nursing plan,and the observation group received stepwise respiratory management．The differences of cardiopulmonary function before and after the intervention were compared．Results The levels of mean arterial pressure,PaCO₂ in the observation group were significantly lower than those in the control group,cardiac index,central venous pressure,extravascular lung water index,PaO₂ and oxygenation index in the observation group were significantly higher than those in the control group（P<0.05）．The success rate of resuscitation and total clinical effective rate in the observation group were significantly higher than those in the control group,and the resuscitation time and respiratory stability time in the observation group were significantly shorter than those in the control group（P<0.05）．The tracheotomy rate,the rate of using invasive ventilator and the incidence of ventilator associated pneumonia and airway complications in the observation group were lower than those in the control group（P<0.05）．Conclusions The establishment of stepwise respiratory management strategy in patients with septic shock and ALI can significantly improve their cardiopulmonary function,improve the effect of clinical resuscitation and reduce the risk of related complications.

目的 观察并评估内毒素性急性肺损伤大鼠吸入一氧化氮后外周血中内皮祖细胞和炎症介质的变化情况。方法 90只SPF级健康大鼠分为3组,A组为正常对照组(n=30),B组为急性肺损伤组(ALI)(n=30), C组为一氧化氮(NO)组(n=30)。分别计算各组外周血内皮祖细胞(Endothelial progenitor cells,EPCs) 数量,同时监测肺组织中白细胞介素-10(Interleukin-10,IL-10)水平和髓过氧化物酶(Myeloperoxidase,MPO)活性。结果 我们成功建立了大鼠的ALI肺损伤模型, C组EPCs数量、MPO活性上升幅度均小于B组、而IL-10上升水平均高于B组,差异有统计学意义(P<0.05)。结论 大鼠吸入一氧化氮可减轻内毒素所致急性肺损伤程度,其机制可能与外周血中内皮祖细胞数量及MPO水平下降和IL-10水平上升有关。

Objective To investigate the effect of nitric oxide(NO) inhalation in endotoxin-induced acute lung injury mice. Methods Ninety SPF mice were randomly assigned to the normal group(group A), ALI group(group B)and ALI+NO group(group C). The number of endothelial progenitor cells was counted and the level of Interleukin-10(IL-10) and myeloperoxidase (MPO) were measured. Results Endotoxin administration resulted in pulmonary edema. The pulmonedema was lightened and the level of MPO were decreased by the inhalation of nitric oxide while the level of IL-10 increased. Conclusion NO inhalation can mitigate acute lung injure. The decline of EPCs and MPO and the increase of IL-10 may be one of the mechanism.

目的 探讨血清降钙素原(PCT)与中性粒细胞淋巴细胞比率(NLR)对预测急性胰腺炎(AP)继发急性肺损伤(ALI)的临床适用性。方法 回顾性分析60个AP病例,对合并ALI的实验组和没有合并ALI的对照组治疗前后血清PCT和NLR进行均数比较、相关性分析、ROC分析等统计分析。结果 两组间治疗前NLR(P=0.019)与治疗期间血清PCT平均值(P<0.001)有统计学差异,ROC分析:治疗前NLR、治疗期间血清PCT平均值对于预测ALI的灵敏度、特异度、约登指数分别为0.778、0.889;0.690、0.881;0.468、0.77,两者的差异有统计学意义(P=0.0134)。结论 急性胰腺炎早期治疗前,NLR对于预测ALI有一定的参考价值,而在急性胰腺炎后期,治疗期间的血清PCT平均值对于预测ALI有着良好的灵敏度和特异度,具有一定的临床适用性。

Objective To investigate the clinical applicability of serum procalcitonin levels and neutrophil-to-lymphocyte ratio (NLR) in predicting acute lung injury(ALI) secondary to acute pancreatitis(AP). Methods Sixty cases of AP were recruited to explore their serum-PCT and NLR before/after treatment. Means comparison, correlation analysis, ROC analysis were carried out. Results The NLR before treatment (P=0.019)and serum-PCT after treatment(P<0.001)were statistical significance of two groups(ALI、NON-ALI). In ROC analysis, the sensitivity, specificity, Jorden index of above two index were 0.778、0.889;0.690、0.881;0.468、0.77 respectively. There were statistically significant differences between them(P=0.0134). Conclusion In the early phase before treatment in AP, NLR has certain reference value in predicting ALI. On the other hand, in the later phase after treatment in AP, serum-PCT has great sensitivity, specificity and clinical applicability.