目的  本研究旨在探讨不同俯卧位通气（PPV）时间对重症肺炎合并胃肠功能障碍患者肠内营养耐受性的影响。方法  选择2020年7月—2023年7月在天津市人民医院重症监护病房（MICU）治疗的80例重症肺炎合并胃肠功能障碍患者为研究对象, 按每日PPV时间分为长时组（≥12 h, n=40）和短时组（<12 h, n=40）。比较两组患者一般资料、氧合指数、胃肠功能指标[腹内压、血清促胃液素（GAS）和血管活性肠肽（VIP）]、肠内营养达标率、胃肠并发症率等。结果  短时组治疗后, 1 d、3 d、5 d氧合指数为（189.93±33.72）、（247.53±63.01）、（325.03±58.11）mmHg,高于长时组的（161.63±36.88）、（191.83±57.65）、（267.95±46.25）mmHg,均P<0.05; 胃残留量为（29.00±7.92）、（19.75±4.45）、（11.00±1.87） mL低于长时组的（75.03±23.29）、（53.13±11.99）、（21.70±5.52） mL, 均P<0.05。短时组治疗后腹内压[（8.53±2.05）mmHg vs （9.75±2.05） mmHg]、VIP水平[（61.14±7.63） vs （67.49±4.43） pg/mL]低于长时组,GAS水平[（65.02±8.84） vs （54.22±9.21）pg/mL]升高（均P<0.05）。短时组总胃肠并发症发生率（7.50%）低于长时组（25.00%）, P=0.034。结论  对于重症肺炎合并胃肠功能障碍患者,每日PPV时间≤12 h可改善氧合并降低胃肠并发症风险, 可能与减轻腹压、调节胃肠激素分泌及提升肠内营养耐受性相关。

      Objective To explore the effect of different duration of prone position ventilation（PPV）on enteral nutritional tolerance in patients with severe pneumonia combined with gastrointestinal dysfunction．Methods A total of 80 patients with severe pneumonia complicated by gastrointestinal dysfunction were treated in the Medical Intensive Care Unit（MICU）of a hospital from July 2020 to July 2023, and were selected as the research subjects．They were divided into the long-duration group（≥12 hours, n=40）and the short-duration group（<12 hours, n=40）according to the daily duration of PPV．The general data, oxygenation index, gastrointestinal function indicators（intra-abdominal pressure, serum gastrin[GAS] and vasoactive intestinal peptide[VIP]）, enteral nutrition achievement rate, and gastrointestinal complications of the two groups were compared．Results The oxygenation index of the short-duration group at 1 d, 3 d,a nd 5 d after treatment（[189.93±33.72], [247.53±63.01], and[325.03±58.11] mmHg, respectively）was significantly higher than that of the long-duration group（[161.63±36.88], [191.83±57.65], and[267.95±46.25] mmHg,respectively, all P<0.05）．The gastric residual volume of the short-duration group（[29.00±7.92], [19.75±4.45], and[11.00±1.87] mL, respectively）was significantly lower than that of the long-duration group（[75.03±23.29], [53.13±11.99], and[21.70±5.52] mL, respectively, all P<0.05）．The intra-abdominal pressure（[8.53±2.05] vs [9.75±2.05] mmHg）and VIP level（[61.14±7.63] vs [67.49±4.43] pg/mL）of the short-duration group after treatment were significantly lower than those of the long-duration group, while the GAS level（[65.02±8.84] vs [54.22±9.21] pg/mL）was significantly higher（all P<0.05）．The total incidence of gastrointestinal complications in the short-duration group（7.50%）was significantly lower than that in the long-duration group（25.00%, P=0.034）．Conclusions For patients with severe pneumonia complicated by gastrointestinal dysfunction, a daily duration of PPV within 12 hours can improve oxygenation and reduce the risk of gastrointestinal complications, which may be related to the reduction of intra-abdominal pressure, regulation of gastrointestinal hormone secretion, and improvement of enteral nutrition tolerance． 

      目的 分析儿童大环内酯类耐药重症肺炎支原体肺炎（SMPP）的危险因素,构建列线图预测模型。 方法 回顾性收集2023年1月—2024年9月在广州医科大学附属番禺中心医院儿科住院治疗的1 121例大环内酯类耐药肺炎支原体肺炎患儿入院初期的临床资料。按7∶3比例将患儿资料随机分为训练集（784例）和验证集（337例）。采用R4.4.1软件使用10重交叉验证最小绝对收缩与选择算法（LASSO）回归分析进行单因素变量筛选,采用Logistics回归分析建立预测模型, 绘制可视化列线图。使用受试者操作特征曲线（ROC）, 校准曲线、Hosmer-Lemeshow（HL）检验及临床决策曲线（DCA）分别评估模型的区分度、校准度和临床使用价值。 结果 在训练集中, LASSO回归结合Logistics回归分析结果显示,院前发热时间>5.5 d、谷丙转氨酶>14.5 U/L、乳酸脱氢酶>287.5 U/L、C反应蛋白>18.65 mg/L、肺实变、合并病毒感染是大环内酯类耐药SMPP发生的危险因素（P<0.05）, 根据上述危险因素构建列线图预测模型。训练集和验证集ROC曲线下面积分别为0.847和0.822; 校准曲线和HL检验显示模型具有良好的校准度; DCA显示预测模型在风险阈值为0.05~0.95时预测性能最优。 结论 院前发热时间、谷丙转氨酶、乳酸脱氢酶、C反应蛋白、肺实变、合并病毒感染是大环内酯类耐药SMPP发生的影响因素, 基于以上因素构建的列线图模型具有较好的预测效能, 有利于早期识别耐药重症病例, 及早采取有效干预,改善患者预后。

      Objective To explore the risk factors and to construct a nomogram prediction model for severe macrolide-resistant Mycoplasma pneumoniae pneumonia（MPP）in children．Methods The clinical data during the initial admission period of 1 121 children with macrolide-resistant MPP who were hospitalized in the Department of Pediatrics of the Affiliated Panyu Central Hospital of Guangzhou Medical University from January 2023 to September 2024 were retrospectively collected．The children data were randomly divided into a training set（n=784）and a validation set（n=337）at a ratio of 7∶3．With R language software（version 4.4.1）, least absolute shrinkage and selection operator（LASSO）regression analysis with tenfold cross-validation was used to screen risk factors, Logistics regression analysis was used to establish prediction model, and a visualization of the risk variables was created using a nomogram．The receiver operating characteristic（ROC）curves, calibration curves, Hosmer-Lemeshow（HL）test and clinical decision curve analysis（DCA）were used to evaluate the discrimination, calibration and clinical application value of the model．Results In the training set, LASSO regression analysis combined with Logistics regression analysis showed that prehospital fever duration > 5.5 days, alanine aminotransferase level> 14.5 U/L, lactate dehydrogenase level> 287.5 U/L, C-reactive protein > 18.65 mg/L, lung consolidation, and co-infection with virus were risk factors for severe macrolide-resistant MPP（P<0.05）．A nomogram prediction model was constructed based on the above risk factors．The area under the ROC curves of the training set and the validation set were 0.847 and 0.822, respectively．The calibration curves and HL test showed that the model had good calibration． The DCA curves showed that the prediction model had the best prediction performance when the risk threshold was between 0.05-0.95．Conclusions Prehospital fever duration, alanine aminotransferase level, lactate dehydrogenase level, C-reactive protein level, lung consolidation and co-infection with virus were risk factors for prediction of severe macrolide-resistant MPP．The nomogram model based on the above factors had a good prediction efficiency, which was conducive to early identification of severe cases with macrolide-resistant, and taking early effective interventions to improve the prognosis．

目的 研究基于儿童早期预警评分（PEWS）的分级干预模式促进重症肺炎患儿康复进程及对呼吸功能的影响。方法 回顾性分析2021年4月—2023年4月我院收治的100例重症肺炎患儿临床资料。将其按照干预方式的差异分为研究组（n=50）及对照组（n=50）。对照组选用常规干预,研究组则于对照组基础上增加基于PEWS的分级干预。对比两组康复进程（相关指标涵盖症状持续时长及住院天数）、呼吸功能（涵盖通气流速、每分钟最大通气量、肺活量、用力肺活量及深吸气量）、并发症发生情况（涵盖呼吸机相关性肺炎、肺大疱及胸膜炎）、患儿家属满意度。结果 研究组各项症状持续时长及住院天数均短于对照组（均P<0.05）。研究组各项呼吸功能指标水平均高于对照组（均P<0.05）。两组各项并发症发生率对比差异无统计学意义（P>0.05）。研究组患儿家属满意度高于对照组（96.00% vs 82.00%,P<0.05）。结论 基于PEWS的分级干预模式促进重症肺炎患儿康复进程的效果较佳,且能改善呼吸功能,提高患儿家属满意度。

Objective To study the effect of graded intervention mode based on Pediatric Early Warning Score（PEWS）on the recovery process and respiratory function of children with severe pneumonia．Methods The clinical data of 100 children with severe pneumonia treated in our hospital from April 2021 to April 2023 were retrospectively analyzed．Those children were divided into study group（n=50）and control group（n=50）according to the difference of intervention methods．Conventional intervention was used in the two groups,and PEWS-based graded intervention was added to the study group．The two groups were compared with each other in terms of recovery process（including duration of symptoms and length of stay）,respiratory function（including ventilation velocity,maximum volume per minute,vital capacity,forced vital capacity and deep inspiratory capacity）,complications（including ventilators associated pneumonia,bullosa and pleurisy）,and family member satisfaction．Results The duration of symptoms and hospitalization days in the study group were shorter than those in the control group（all P<0.05）．The levels of respiratory function indexes in study group were higher than those in control group（all P<0.05）．There was no significant difference in the incidence of complications between the two groups（P>0.05）．The satisfaction of family member in the study group was higher than that in the control group（96.00% vs 82.00%）（P<0.05）．Conclusions The PEWS based graded intervention model has a good effect on promoting the rehabilitation process of children with severe pneumonia,and can improve respiratory function,and increase the satisfaction of family member of children with severe pneumonia．

目的 探讨计划-实施-检查-处理（PDCA）循环法及根本原因分析法在持续正压通气治疗重症肺炎患儿中的应用效果。方法 选取2021年1月—2023年1月医院收治并接受鼻塞式持续正压通气治疗的重症肺炎患儿80例,基于随机数字表法分为两组,每组各40例。对照组接受常规护理,观察组采用PDCA循环法联合根本原因分析法护理干预。比较两组临床症状改善时间、血气指标[动脉血氧分压（PaO₂）、动脉血氧饱和度（SaO₂）、动脉血二氧化碳分压（PaCO₂）]、肺功能指标[第1秒用力呼气容积（FEV₁）、潮气量（VT）]、炎症免疫指标[单核细胞趋化蛋白-1（MCP-1）、可溶性髓系细胞触发受体-1（sTREM-1）、可溶性细胞间黏附分子-1（sICAM-1）]水平变化,比较两组患儿家属满意度情况。结果 观察组患儿咳嗽、气促、哮鸣音、心率恢复及紫绀等症状改善用时均低于对照组,比较差异有统计学意义（P<0.05）。干预前,两组患儿PaO₂、SaO₂、PaCO₂、FEV₁、VT、MCP-1、sTREM-1、sICAM-1水平比较差异均无统计学意义（P>0.05）;干预后,两组患儿上述指标水平均有不同程度变化（P<0.05）,观察组PaO₂（97.18±7.90 mmHg vs 90.30±7.12 mmHg）、SaO₂（93.58±3.82% vs 86.30±4.21%）、FEV₁（2.66±0.46 L vs 1.97±0.34 L）、VT（11.92±1.89% vs 9.83±1.10%）水平均高于对照组,观察组PaCO₂（36.70±3.97 mmHg vs 40.65±3.79 mmHg）、MCP-1（58.45±11.94 ng/L vs 74.46±16.69 ng/L）、sTREM-1（36.25±8.30 ng/L vs 51.57±9.51 ng/L）、sICAM-1（187.52±31.22 mg/L vs 243.73±46.79 mg/L）水平低于对照组,差异均有统计学意义（P<0.05）。观察组患儿家属满意度整体优于对照组（P<0.05）;观察组总满意率（97.5% vs 77.5%）高于对照组,差异有统计学意义（P<0.05）。结论 PDCA循环法及根本原因分析法应用于接受持续正压通气治疗的重症肺炎患儿,能够有效促进患儿临床症状改善,有利于血气及肺功能恢复,且可降低炎症反应,患儿家属满意度较高。

Objective To explore the application effect of Plan-Do-Check-Action（PDCA）circulation method and root cause analysis method in the treatment of children with severe pneumonia with continuous positive pressure ventilation．Methods From January 2021 to January 2023,80 children with severe pneumonia who were admitted to hospital and received nasal plug continuous positive pressure ventilation treatment were enrolled in this study．Based on the random number table method,they were divided into two groups,with 40 cases in each group．The control group received routine nursing,while the observation group received PDCA circulation method combined with root cause analysis nursing intervention．The improvement time of clinical symptoms,changes in blood gas indicators[arterial partial oxygen pressure（PaO₂）,arterial oxygen saturation（SaO₂）,arterial partial pressure of carbon dioxide（PaCO₂）],lung function indicators [（forced expiratory volume in 1 second,FEV₁）,tidal volume（VT）],and inflammatory immune indicators [monocyte chemotactic protein-1（MCP-1）,soluble myeloid cell trigger receptor-1（sTREM-1）,soluble intercellular adhesion molecule-1（sICAM-1）] levels between the two groups were compared,and the family members’ satisfaction of the two groups was also compared．Results The improvement time for symptoms such as cough,shortness of breath,wheezing,heart rate recovery and cyanosis in the observation group was lower than that in the control group,and the difference was statistically significant（P<0.05）．Before intervention,there was no statistically significant difference in the levels of PaO₂,SaO₂,PaCO₂,FEV₁,VT,MCP-1,sTREM-1 and sICAM-1 between the two groups of children（P>0.05）．After intervention,the levels of the above indicators in both groups of children showed varying degrees of change（P<0.05）．The levels of PaO₂（97.18±7.90 mmHg vs 90.30±7.12 mmHg）,SaO₂（93.58±3.82% vs 86.30±4.21%）,FEV₁（2.66±0.46 L vs 1.97±0.34 L）,VT（11.92±1.89% vs 9.83±1.10%）in the observation group were higher than those in the control group．The levels of PaCO₂（36.70±3.97 mmHg vs 40.65±3.79 mmHg）,MCP-1（58.45±11.94 ng/L vs 74.46±16.69 ng/L）,sTREM-1（36.25±8.30 ng/L vs 51.57±9.51 ng/L）and sICAM-1（187.52±31.22 mg/L vs 243.73±46.79 mg/L）in the observation group were lower than those of the control group,with statistically significant differences（P<0.05）．The overall satisfaction of the observation group was better than that of the control group（P<0.05）,the total family members’ satisfaction rate of the observation group was higher than that of the control group（97.5% vs 77.5%）,with a statistically significant difference（P<0.05）．Conclusions PDCA circulation method and root cause analysis method applied to children with severe pneumonia who receive continuous positive pressure ventilation treatment,can effectively promote the improvement of clinical symptoms,be conducive to the recovery of blood gas and lung function,and reduce inflammatory reaction,with high family members’ satisfaction．

目的 探讨清热化痰宣肺汤治疗痰热壅肺型重症肺炎的临床效果。方法 选择2022年3月—2023年6月天津市中西医结合医院收治的158例痰热壅肺型重症肺炎患者进行探讨,采用随机分组法分为研究组和对照组,每组各79例,对照组接受常规对症处理联合抗生素治疗,研究组在对照组基础上给予清热化痰宣肺汤,两组均治疗2周,比较疗效、中医证候积分、肺功能、血气分析结果以及不良反应发生情况。结果 研究组总有效率为94.94%,高于对照组的84.81（P=0.035）;研究组治疗后发热、痰壅以及气促评分分别为（1.12±0.33）分、（1.02±0.28）分及（1.16±0.30）分;对照组治疗后发热、痰壅以及气促评分分别为（1.45±0.36）分、（2.11±0.42）分及（2.06±0.39）分,研究组和对照组各项评分均较治疗前降低（均P<0.05）,研究组低于对照组（P均<0.05）;治疗后研究组PEF、FEV₁、FVC以及MVV分别为（3.48±0.53）L/s、（2.95±0.52）L、（2.98±0.58）L、（88.15±5.25）L/min,治疗后对照组的PEF、FEV₁、FVC以及MVV分别为（4.22±0.53）L/s、（2.41±0.47）L、（2.98±0.58）L、（88.15±5.25）L/min,两组均较治疗前升高（均P<0.05）,且研究组高于对照组（均P<0.05）; 治疗后研究组和对照组PaO₂分别为（9.77±1.12）kPa、（9.33±1.09）kPa,均较治疗前升高（均P<0.05）,研究组高于对照组（P=0.013）,治疗后研究组和对照组的PaCO₂分别为（4.22±0.14）kPa、（5.11±0.16）kPa,均较治疗前下降（均P<0.05）,研究组低于对照组（P<0.001）;研究组出现3例恶心不良反应,对照组未见不良反应发生,组间无显著差异（P>0.05）。结论 清热化痰宣肺汤治疗痰热壅肺型重症肺炎效果理想,可明显改善肺功能及血气指标,且具有较高安全性。

目的 对本院老年重症肺炎患者的临床资料进行回顾性分析,为老年重症肺炎多药耐药菌感染的临床诊疗提供参考。方法 回顾性分析本院医院76例老年重症肺炎患者的病例信息,将患者随机分为研究组和对照组,每组38例,研究组患者在对照组基础上(头孢哌酮／舒巴坦)联合胸腺肽α1治疗。研究2组患者的痰液致病菌分布及其临床特点,通过对比2组患者治疗前后免疫功能指标T淋巴细胞CD4⁺及炎症因子超敏C-反应蛋白(hypersensitive C-reactive protein,hs-CRP)、白介素-6(interleukin-6, IL-6)、肿瘤坏死因子-α(tumor necrosis factor-α, TNF-α)水平变化,对头孢哌酮/舒巴坦联合胸腺肽α1治疗老年重症肺炎的临床效果进行分析。结果 76例老年重症肺炎患者中,共检出143株病原菌,以不动杆菌属为主的革兰氏阴性菌(89株)为主要致病菌株,占比64.3%,革兰氏阳性菌(54株)以葡萄球菌属为主,占比35.7%;排名前3位的主要致病菌为:铜绿假单胞菌(33.6%)、金黄色葡萄球菌(22.4%)和大肠埃希菌(14.7%)。痰液分离出的致病菌出现了普遍的严重耐药性,主要以多药耐药铜绿假单胞菌为主。2组治疗前 T 淋巴细胞CD4⁺、hs-CRP、IL-6、TNF-α水平对比无差异(P＞0.05),治疗后观察组CD4⁺水平更高,而 CRP、TNF-α、IL-6水平更低,与对照组有差异(P＜0.05)。结论 老年重症肺炎多药耐药菌重症肺炎检出病原菌主要以铜绿假单胞菌为主,治疗上联合使用胸腺肽α1,能够有效改善患者的免疫抑制状态、减轻老年患者机体炎症反应,对于提高老年患者临床治疗效果及改善患者预后有着重要的临床意义,值得广泛推广。

目的 对儿童重症肺炎支气管肺泡灌洗液(BALF)进行病原学分析及疾病预后的分析。方法 本研究选取2019年3月—2020年12月在我院儿科住院并进行肺泡灌洗治疗的40例重症肺炎患儿作为研究对象。通过对这些患儿在感染急性期肺泡灌洗液中的细菌、真菌、肺炎支原体等进行病原学检查以及T 淋巴细胞亚群的检测,了解台山地区儿童重症肺炎病原体情况及耐药性、T淋巴细胞亚群与疾病严重程度、预后评估的关系。结果 BALF病原学检测结果分析中,肺炎支原体27例,肺炎支原体+肺炎链球菌5例,肺炎支原体+中间葡萄球菌2例,肺炎支原体+铅黄肠球菌1例,肺炎支原体+嗜麦芽假单胞菌2例,病原菌阴性3例;本组病例血清T细胞亚群检测结果显示:大部分病例CD3⁺、CD4⁺、CD8⁺及CD4⁺/CD8⁺水平有不同程度的下降。其中CD3⁺水平下降的有6例,CD4⁺水平下降的有16例,CD8+水平下降的有17例,CD4⁺、CD8⁺水平同时下降的有14例,CD3⁺、CD4⁺、CD8⁺水平同时下降的有4例;BALF细胞总数(3673.1±377.9)×10⁶ /L,巨噬细胞比例(23.6±17.6)%,淋巴细胞(22.1±16.2)%,中性粒细胞(46.5±24.8)%。结论 病原学分析儿童重症肺炎BALF的主要病原菌为肺炎支原体,血清T细胞亚群检测大多表现为CD4⁺、CD8⁺水平下降。

Objective To analyze the etiology of bronchoalveolar lavage fluid and prognosis of children with severe pneumonia. Methods In this study, 40 children with severe pneumonia who were hospitalized in the pediatrics department of our hospital and underwent alveolar lavage treatment from March 2019 to December 2020 were selected as the research objects. Through the detection of pathogens such as bacteria, fungi, Mycoplasma pneumoniae and T lymphocyte subsets of these children in the acute phase of infection, we can understand the pathogens and drug resistance of children with severe pneumonia in Taishan area and the relationship among drug resistance, T lymphocyte subsets and disease severity and prognosis assessment. Results In the analysis of the BALF pathogenic test results, there were 27 cases with Mycoplasma pneumoniae, 5 cases with Mycoplasma pneumoniae+Streptococcus pneumoniae, 2 cases with Mycoplasma pneumoniae+Staphylococcus intermedius, 1 case with Mycoplasma pneumoniae+Enterococcus casseliflavus, 2 cases with Mycoplasma pneumoniae+Pseudomonas maltophilia and 3 cases were pathogenic bacteria negative. The test results of serum T cell subsets of these cases showed that most of the cases had different degrees of decline in the levels of CD3⁺, CD4⁺, CD8⁺ and CD4⁺/CD8⁺. Among them, CD3⁺ levels decreased in 6 cases, CD4⁺ levels decreased in 16 cases, CD8⁺ levels decreased in 17 cases, CD4⁺ and CD8⁺ levels decreased in 14 cases, and CD3⁺, CD4⁺, and CD8⁺ levels decreased in 4 cases; total cell number of BALF was (3 673.1±377.9)×10⁶/L, the proportion of macrophages was (23.6±17.6)%, lymphocytes had (22.1±16.2)%, and neutrophils had (46.5±24.8)%. Conclusions Pathogenic analysis showed that the main pathogen of BALF in children with severe pneumonia is Mycoplasma pneumoniae, and the detection of serum T cell subsets mostly showed a decrease in CD4⁺ and CD8⁺ levels.

目的 探究血清C反应蛋白与白蛋白比值(CRP/ALB)、中性粒细胞与淋巴细胞比值(NLR)、血糖不稳定指数(GLI)水平对重症肺炎患者预后的预测价值。方法 将我院2020年1月—2021年5月收治的126例重症肺炎患者作为研究对象,根据入院治疗28 d的预后情况,分为存活组(93例)和死亡组(33例)。对比2组患者的一般资料,采用多因素Logistic分析重症肺炎患者高危因素,应用ROC曲线评估血清CRP/ALB、NLR、GLI水平对重症肺炎患者预后的预测价值。结果 2组患者一般资料对比,NEU、CRP、APACHEⅡ、CRP/ALB、NLR、GLI水平差异有统计学意义(P<0.05);多因素Logistic回归分析显示APACHEⅡ评分、血清CRP/ALB、NLR、GLI水平是重症肺炎患者死亡的危险因素;ROC曲线分析结果显示,CRP/ALB、NLR、GLI曲线下面积分别为0.837,0.826,0.837。结论 CRP/ALB、NLR、GLI水平对重症肺炎患者预后均具有较高的预测价值,其中以CRP/ALB的预测价值最佳。

Objective To explore the prognostic predictive value of serum CRP/ALB, NLR and GLI in patients with severe pneumonia. Methods A total of 126 patients with severe pneumonia treated in our hospital from January 2020 to May 2021 were divided into survival group (93 cases) and death group (33 cases) according to the prognosis of 28 days of hospitalization. The general data of the two groups were compared, the high-risk factors of patients with severe pneumonia were analyzed by multivariate logistic, and the predictive value of serum CRP/ALB, NLR and GLI levels on the prognosis of patients with severe pneumonia was evaluated by ROC curve. Results There were significant differences in the levels of NEU, CRP, APACHE Ⅱ, CRP/ALB, NLR and GLI between the two groups (P<0.05); multivariate logistic regression analysis showed that APACHE Ⅱ score, serum CRP/ALB, NLR and GLI were the risk factors of death in patients with severe pneumonia; ROC curve analysis showed that the areas under CRP/ALB, NLR and GLI curves were 0.837, 0.826 and 0.837 respectively. Conclusions The levels of CRP/ALB, NLR and GLI had high predictive value in the prognosis of patients with severe pneumonia, among which CRP/ALB had the best predictive value.

目的 确定CD4⁺CD25⁺Treg调节性T细胞在重症肺炎克雷伯菌肺炎中的表达以及意义,探讨CD4⁺CD25⁺Treg在重症肺炎克雷伯菌肺炎的免疫抑制中的调控作用。方法 通过气管内滴注肺炎克雷伯菌菌液建立重症肺炎模型。采用流式细胞仪检测CD4⁺CD25⁺Treg细胞及酶联免疫吸附法(ELISA)等方法检测各种细胞因子。结果 重症肺炎克雷伯菌肺炎大鼠的脾脏和肺中CD4⁺CD25⁺Treg的数量增加。使用了CD25抗体(PC61)去除机体内源性的CD4⁺CD25⁺Treg,分别去除脾脏和肺的94%和90%的CD4⁺CD25⁺Treg。CD25抗体组在建模4 h,12 h及24 h后,肺部MPO及血清IL-1,IL-6,MIP-2较对照组高(P<0.05),肺和BLA比对照组高(P<0.05),CD25抗体组大鼠生存率比对照组低(P<0.05)。结论 内源的CD4⁺CD25⁺Treg对大鼠抑制重症肺炎克雷伯菌肺炎的过度免疫损害反应起到保护作用。

Objective To confirm the expression and meaning of the T regular cell in the severe Klebsiella pneumonia, and to evaluate the regular and control affect in the immunologic suppression of the severe Klebsiella pneumonia. Methods To build the severe pneumonia model by intratracheally inoculated with Klebsiella pneumoniae bacteria. To check sorts of inflammation factors by the methods of ELISA and flow cytometry. Results The quantity of the CD4⁺CD25⁺Treg in the splenic and lungs of the mice with severe Klebsiella pneumonia were increased. Anti-CD25Ab(PC61) was used to remove endogenousCD4⁺CD25⁺Treg. Anti-CD25 treatment remove 90% of CD4⁺CD25⁺Treg cells. The cytokine production(IL-1β,IL-6,MIP-2)in the anti-CD25-treated group were significantly increased. And it also increased significantly in the airway neutrophil infiltration, while the survival rate had been decreased. Conclusion Endogenous CD4⁺CD25⁺Treg can provide obvious protection effect to the restraining the over immunity damage of the severe Klebsiella pneumonia for the mice.