目的 探讨自回归求和时间序列模型（ARIMA）在耐碳青霉烯类肺炎克雷伯菌（CRKP）医院感染预测中的应用，为CRKP感染的科学防控提供策略。方法 选取贾汪区人民医院住院患者2018年1月—2024年12月共7年每月CRKP医院感染率，应用SPSS 19.0建立ARIMA模型，利用该模型对2024年1—12月每月CRKP医院感染数据进行验证，以评价模型的预测性能。结果 用2018—2024年住院患者每月CRKP医院感染率建模、拟合，建立最优模型ARIMA（1，1，1），模型拟合值与实际值较吻合，模型对CRKP医院感染率实际值与预测值吻合度较高，平均相对误差为5.40%。结论 用ARIMA模型可有效拟合、预测CRKP医院感染情况，为CRKP防控提供科学指导。

     Objective To explore the value of auto regressive integrated moving average（ARIMA）model in predicting theinfection rate of carbapenem-resistant Klebsiella pneumoniae（CRKP）．Methods The monthly incidence of nosocomial infection of CRKP in Jiawang District People’s Hospital from 2018 to 2024 was selected，and the ARIMA model was established by19.0 SPSS to analyze the fitting and prediction value of the model．Results The ARIMA was established based on the monthly CRKP infection rate from January 2018 to December 2024．The fitted value of the ARIMA（1，1，1）model was in good agreement with the actual value．The incidence of CRKP infection were in good agreement with the predicted value．The average relative errors were 5.40%．Conclusions The ARIMA model can effectively fit and predict the CRKP infection rate，providing scientific guidance for the prevention and control of CRKP infection．

       目的   通过对急性深静脉血栓形成（DVT）患者经导管接触性溶栓治疗（CDT）中，影响血管导管相关感染（VCAI）危险因素及病原菌分析，为VCAI的预防提供合理、有效的措施。方法   收集2019年1月—2022年12月徐州市肿瘤医院介入科行CDT治疗的急性DVT患者的临床资料，回顾性调查患者诊疗相关资料及血培养结果，并对发生VCAI和病原菌情况进行分析。结果   本研究共调查急性DVT行CDT治疗的患者437例，发生VCAI的患者共21例，千日感染率为0.543‰。多因素Logistic回归分析结果显示：溶栓频率＞3次/天［OR=3.49（95%CI：1.86~6.45）］、导管留置时间＞7 d［OR=3.86（95%CI：1.26~10.18）］和有导管回送［OR=8.67（95%CI：4.83~12.65）］是患者发生VCAI的危险因素（P＜0.05）。发生VCAI的21例患者，血培养共培养出24株病原菌，有3例患者出现复合病原菌感染情况。其中以革兰阳性球菌最为常见，共培养出13株，占比54.17%，革兰阴性菌9株，占比37.5 %。结论   导管留置时间＞7 d、溶栓频率＞3次/天和有导管回送是急性DVT患者CDT治疗中发生VCAI的危险因素。VCAI的病原菌以单一病原菌为主，可合并其他病原菌感染，其中以革兰阳性球菌为主。

        Objective  By analyzing the risk factors and pathogens of vessel catheter associated infection（VCAI）in patients with acute deep vein thrombosis（DVT）undergoing catheter directed thrombolysis（CDT），to provide  reasonable and effective measures for the prevention and treatment of VCAI ．Methods  Clinical data of patients undergoing CDT treatment for acute DVT in the interventional department of the hospital from January 2019 to December 2022 was collected，patient diagnosis and treatment related data and blood culture results were retrospectively investigated and organized，and the occurrence of VCAI and pathogenic bacteria was statistically analyzed．Results  This study investigated 437 patients undergoing CDT treatment for acute DVT，and a total of 21 patients developed VCAI，with an infection rate of 0.543‰．The  results of multiple Logistic  regression analysis show that thrombolysis frequency＞3 times/day（OR=3.49［95%CI：1.86-6.45］），catheter retention days＞7 days（OR=3.86［95%CI：1.26-10.18］），and the presence of catheter return（OR=8.67［95%CI：4.83-12.65］） were risk factors for the occurrence of VCAI in patients．Among the 21 patients with VCAI，a total of 24 strains of pathogenic bacteria were discoveredin blood culture，and 3 patients developed composite pathogen infections．Among them，Gram  positive cocci were the most common，with a total of 13 strains cultured，accounting for 54.17%，9 strains of Gram negative bacteria，accounting for 37.5%．Conclusions  The duration of catheter retention＞7 days，thrombolysis frequency＞3 times/day，and the presence of catheter return are risk factors for VCAI in acute DVT patients undergoing CDT treatment．The pathogen of VCAI is mainly single pathogen，which can be combined with other pathogens，among which Gram positive cocci are the main pathogen．

       目的  调查深圳地区综合性医院门诊幽门螺杆菌（Hp）对8种常见抗菌药物的耐药情况。方法  采集¹³C呼气试验阳性的患者胃黏膜标本313例，进行Hp分离培养及抗菌药物敏感性试验。结果  313例患者分离培养得到247例Hp菌株，培养阳性率78.91%，不同性别、不同年龄患者Hp分离培养阳性率比较差异无统计学意义（P＞0.05）。Hp对甲硝唑、克拉霉素、左氧氟沙星、利福平、阿莫西林、四环素、呋喃唑酮、庆大霉素耐药率依次为88.66%（219/247）、38.46%（95/247）、38.06%（94/247）、4.05%（10/247）、1.21%（3/247）、0.40%（1/247）、0.40%（1/247）、0（0/247）。双重耐药率为38.46%（95/247），其中Hp对克拉霉素+甲硝唑组合耐药率最高（18.62%，46/247），对甲硝唑+左氧氟沙星耐药率居其次（17.00%，42/247）。多重耐药率为19.84%（49/247）。不同年龄、性别患者双重耐药率、多重耐药率比较差异均无统计学意义（P＞0.05）。结论  深圳地区分离的Hp菌株对甲硝唑、克拉霉素、左氧氟沙星耐药率相对更高，且双重耐药、多重耐药情况严重。

        Objective  To investigate the antibiotic resistance of Helicobacter pylori（Hp）to eight commonly  used antibiotics in outpatients of general hospitals in Shenzhen．Methods  Gastric mucosal samples were collected from 313 patients who tested positive for the  ¹³C breath test，and Hp strains were isolated and cultured．Antibiotic susceptibility testing was performed on the isolated Hp strains．Results  Of the 313 patients，247 Hp strains were isolated，with a culture-positive rate of 78.91%．There was no significant difference in culture-positive rates between different genders and age groups（P＞0.05）．The resistance rates to metronidazole，clarithromycin，levofloxacin，rifampicin，amoxicillin，tetracycline，furazolidone，and gentamicin were 88.66%（219/247），38.46%（95/247），38.06%（94/247），4.05%（10/247），1.21%（3/247），0.40%（1/247），0.40%（1/247），0（0/247），respectively．The dual resistance rate was 38.46%（95/247），with the highest combination  resistance observed in clarithromycin + metronidazole（18.62%，46/247），followed by metronidazole + levofloxacin（17.00%，42/247）．The multi-drug resistance rate was 19.84%（49/247）．There were no significant differences in dual resistance rates（P＞0.05）or multiple resistance rates（P＞0.05）between different age groups and genders．Conclusions  The Hp strains isolated in Shenzhen exhibited relatively higher resistance rates to metronidazole，clarithromycin，and levofloxacin，with substantial dual and multi-drug resistance．

       目的   探究新生儿坏死性小肠结肠炎接受肠腹壁造口术后，对感染指标和免疫指标的影响效果，以及术中、术后不良反应发生情况。方法   选取2016年1月—2024年1月因坏死性小肠结肠炎在潍坊市妇幼保健院接受肠腹壁造口术的56例患儿为A组，另收集同时期因坏死性小肠结肠炎行I期肠切除肠吻合的39例患儿为B组，观察并比较两组患儿术前、术后免疫指标和感染指标的变化情况。另收集同时期40名健康新生儿，对比A组患儿出院前的免疫、感染指标的与健康新生儿差异情况。出院后继续门诊随访，观察术后并发症及不良反应发生情况。结果  A组和B组患儿接受手术后，免疫指标（IgA、IgG、IgM）较术前呈上升趋势，而感染指标（IL-6、PCT、TNF-α）较术前下降。出院前1天A组IgG、IgM水平均高于B组，差异有统计学意义（t=2.312，P=0.023；t=3.214，P=0.002）。B组患儿术后第2天、术后第7天、出院前1天IL-6水平高于A组，差异有统计学意义（t=-4.252，P＜0.001；t=-3.383，P=0.001；t=-2.505，P=0.014）。至出院前1天，A组患儿的免疫指标和感染指标与健康新生儿相比，差异无统计学意义（P＜0.05）。所有手术患儿住院期间至还纳手术前无严重并发症发生。结论   肠腹壁造口术对患有坏死性小肠结肠炎的患儿治疗效果较好，可在一定程度上减轻炎症反应，改善患儿免疫功能。远期效果较好，安全性良好。

       Objective  To investigate the effect of enterostomy on infection indexes and immune indexes in necrotizing enterocolitis，as well as the occurrence of enterostomy and postoperative adverse reactions．Methods  Fifty-six neonates who underwent enterostomy for necrotizing enterocolitis in Weifang Maternal and Child Health Hospital from January 2016 to January 2024 were selected as Group A，and 39 neonates who underwent phase  I intestinal  resection and anastomosis for necrotizing enterocolitis during the same period were selected as Group B．The changes of preoperative and postoperative immune indicators and infection indicators between the two groups of neonates were observed and compared．In addition，40 healthy neonates were selected during the same period，and the differences in immune and infection indexes between group A and healthy neonates were compared before discharge．Patients were followed up after discharge to observe postoperative complications and adverse reactions．Results  After surgery，the immune indexes（IgA，IgG，IgM）of the two groups（A and B） were higher than those before surgery，while the infection indexes（IL-6，PCT，TNF-α）were significantly lower than those before surgery．The levels of IgG and IgM in Group A were higher than those in Group B one day before discharge，and the differences were statistically significant（t=2.312，P=0.023；t=3.214，P=0.002）．In Group B，the levels of IL-6 on postoperative day two，postoperative day seven，and one  day  before discharge were significantly higher than in Group A．The differences were statistically significant（t=-4.252，P＜0.001；t=-3.383，P=0.001；t=-2.505，P=0.014）．By one day before discharge，the immune indicators and infection indicators of the infants in Group A were not significantly different from those of healthy newborns．No serious complications occurred among all surgical patients during their hospital stay until the enterostomy closure．Conclusions  Enterostomy has a good therapeutic effect on neonates with necrotizing enterocolitis，which can reduce the inflammatory response and improve the immune function of children to a certain exten，with better long-term effects and good safety．

       目的   探讨营养评估及炎症因子水平对非霍奇金淋巴瘤（NHL）患者化学治疗（化疗）后感染及平均住院日的影响。方法   回顾性分析接受R-CHOP治疗的NHL患者95例。通过受试者工作特征（ROC）曲线确定患者主观整体营养评估（PG-SGA）预测患者化疗后感染的界值。将患者分为PG-SGA＜4组与PG-SGA≥4组，比较两组间营养及炎症相关指标的差异。采用单因素与多因素回归分析NHL患者化疗后感染及平均住院日延长的危险因素。结果  ROC曲线显示PG-SGA为3.5时，约登指数最大，预测NHL患者化疗后感染灵敏度为92%，特异度为11.1%。PG-SGA≥4组患者平均年龄、国际预后指数（IPI）及Ann arbor Ⅲ~Ⅳ期比例均高于PG-SGA＜4组（P＜0.05）。与PG-SGA＜4组相比，PG-SGA≥4组患者白介素6（IL-6）及中性粒细胞与淋巴细胞比值（NLR）明显升高，且化疗后感染率及平均住院日≥5 d比例高于对照组（P＜0.05）；与对照组相比，PG-SGA＜4组患者前白蛋白、白蛋白和血红蛋白水平升高（P均＜0.05）。多因素回归分析显示，PG-SGA≥4及合并糖尿病是NHL患者化疗后感染率的独立危险因素（P均＜0.05）。白蛋白低于35 g/L及合并化疗后感染是NHL患者平均住院日延长的独立危险因素（P均＜0.05）。结论   基于PG-SGA的营养评估及炎症因子分析对NHL患者化疗后感染及平均住院日的预测具有临床指导意义。

       Objective  To explore the effects of nutritional assessment and inflammatory factor levels on post-chemotherapy infections and length of hospital stay in patients with non-Hodgkin’s lymphoma（NHL）．Methods  A total of 95 NHL patients treated with the R-CHOP regimen were retrospectively analyzed．The  cut-off  value  of  Patient-Generated  Subjective Global Assessment （PG-SGA） for post-chemotherapy infection in NHL patients was evaluated by Receiver Operating Characteristic（ROC）curves．Patients were categorized into PG-SGA＜4 and PG-SGA≥4 groups and compared for differences of nutritional and inflammation-related factors．Univariate and multivariate logistic regression were used to analyze the risk factors for post-chemotherapy infection and length of hospital stay（LHS）．Results  The ROC curve showed that the Youden index was largest at PG-SGA of 3.5，which predicted post-chemotherapy infection in NHL patients with a sensitivity of 92% and a specificity of 11.1%．The mean age，International Prognostic Index（IPI），and Ann Arbor stage Ⅲ~IV proportion in patients with PG-SGA≥4 were higher compared with the control（P＜0.05）．Patients with PG-SGA≥4 had significantly higher interleukin-6 and neutrophil-to-lymphocyte ratio（NLR），and the infection rate and the proportion of LHS≥5 days after chemotherapy were higher than those in the control group（P＜0.05）．Patients in the PG-SGA＜4 group had significantly higher prealbumin，albumin，and hemoglobin levels compared to the PG-SGA≥4 group（P＜0.05）．Multifactorial logistic regression analysis revealed that PG-SGA≥4 and combined diabetes mellitus were independent risk factors for post-chemotherapy infection rate in NHL patients（both P＜0.05）．Albumin less than 35 g/L and combined post-chemotherapy infection were independent risk factors for prolonged LHS in NHL patients（both P＜0.05）．Conclusions  PG-SGA nutritional assessment and inflammatory factor analysis are clinically instructive in predicting post-chemotherapy infections and LHS in NHL patients．

目的 探讨男性人乳头瘤病毒（HPV）基因分型感染情况。方法 收集采用聚合酶链式反应反向斑点杂交法进行28种HPV基因分型检测的1 137例男性检查结果,进行回顾性分析。结果 1 137例男性患者中阳性441例,阳性率为38.79%,感染率居前5位的亚型依次为HPV6（11.35%）、HPV11（7.92%）、HPV16（5.10%）、HPV52（3.52%）、HPV43（2.64%）;就诊人群以20~39岁为主,感染人数也最多,各年龄组间阳性率比较差异无统计学意义（P>0.05）,≥50岁组HPV52型阳性率高于20~29岁组（P<0.05）和30~39岁组（P<0.05）。单一感染占67.35%,多重感染占32.65%,单一感染中低危型占比最多（41.27%）,多重感染中,二重感染占比最多（19.50%）,高低危混合感染为各种类型感染之首（15.87%）。结论 1 137例样本中HPV阳性率为38.79%,感染亚型以HPV6、HPV11、HPV16、HPV52、HPV43为主,单一低危型感染较为常见,各年龄组间阳性率相近。

Objective To investigate the genotypes of human papillomavirus（HPV）infection．Methods A total of 1 137 male patients’ diagnoses were collected and analyzed retrospectively,which came from the detections using polymerase chain reaction reverse dot blot hybridization to genotype 28 HPV．Results Among 1 137 male patients,441 were HPV positive,with a positive rate of 38.79%,the infections of top five HPV types were HPV6（11.35%）,HPV11（7.92%）,HPV16（5.10%）,HPV52（3.52%）,HPV43（2.64%）．The majority of the patients were the 20-39 age group,and the number of infections was also the highest．There was no statistical significance on the difference in the positive rate among different age groups（P>0.05）．The positive rate of HPV52 in ≥50 years old group was higher than the groups of aged 20~29（P<0.05）and 30~39（P<0.05）．The single and multiple infections accounted for 67.35% and 32.65%．The low-risk HPV accounted for the highest proportion（41.27%）in single infections,while in patients with multiple infections,the proportion of dual infections was the largest（19.50%）and the high- and low-risk HPV mixed infections was the maximum of the infection types（15.87%）．Conclusions The detection rate of positive HPV in 1 137 male patients was 38.79%,mainly were type 6,type 11,type 16,type 52 and type 43,and the single low-risk HPV infected was common．Positive rates were similar among different age groups．

目的 探究肺炎支原体（MP）感染大叶性肺炎患儿常规通气、脉冲振荡肺功能特点。方法 将2022年5月—2023年5月广州市妇女儿童医疗中心收治的90例MP感染大叶性肺炎患儿为观察组,通气体检健康儿童50例为对照组,依据病变将累及多肺叶作为观察A组（10例）,累及单肺叶作为观察B组（80例）。均接受常规通气与脉冲振荡肺功能测定,观察测定结果,以此为基础,分析肺功能特点。结果 观察组各常规通气肺功能指标测定结果均低于对照组健康儿童,差异有统计学意义（P<0.05）。观察组R5、R20的实测值/预计值高于对照组,X5实测值低于对照组,差异有统计学意义（P<0.05）。气道阻力指标与肺功能呈负相关关系（P<0.05）。观察组两组最大肺活量（VCMAX）、呼气流量峰值（PEF）、用力肺活量（FVC）75%、FVC50%、FVC25%的实测值/预计值差异无统计学意义,观察A组患儿FVC、FEV₁的实测值/预计值低于观察B组患儿,差异有统计学意义（P<0.05）。两组患儿脉冲振荡肺功能对比差异无统计学意义（P>0.05）。90例患儿中,常规通气异常患儿12例,患儿治疗前后VCMAX、FVC75%、FVC50%的实测值/预计值差异无统计学意义,患儿治疗前FVC、FEV₁、PEF、FVC25%的实测值/预计值均低于治疗后,差异有统计学意义（P<0.05）。结论 常规通气与脉冲振荡相关性良好,气道阻力对VCMAX及FVC具有反向作用,MP感染大叶性肺炎主要表现为小气道通气功能受损,气道阻力升高。

Objective To explore the lung function characteristics of routine ventilation and pulse oscillation in children with lobar pneumonia infected with Mycoplasma pneumoniae（MP）．Methods Ninety children with MP infected lobar pneumonia admitted to Guangzhou Women and Children's Medical Center from May 2022 to May 2023 were selected as the observation group,and 50 healthy children undergoing ventilation examination were selected as the control group．Based on the lesion,cases with multi lobar involvement were selected as the observation group A（10 cases）,cases with single lobar involvement were selected as the observation group B（80 cases）．All patients underwent routine ventilation and pulse oscillation received pulmonary function measurement,and the measurement results were observed．Based on this,the characteristics of lung function were analyzed．Results The results of routine ventilation lung function indicators in the observation group were lower than those in the control group,and the difference was statistically significant（P<0.05）．The measured/expected values of R5 and R20 in the observation group were higher than those in the control group,while the measured values of X5 were lower than those in the control group,with statistical significance（P<0.05）．There is a negative correlation between airway resistance indicators and lung function（P<0.05）．The measured/predicted values of vital capacity max（VCMAX）,peak expiratory flow（PEF）,forced vital capacity（FVC）75%,FVC50%,and FVC25% in the observation group were not with statistically significant difference．The measured/predicted values of FVC and FEV₁ in the observation group A were lower than those in the observation group B,and the difference was statistically significant（P<0.05）．There was no statistically significant difference in pulmonary function between the two groups of pediatric patients with pulse oscillation（P>0.05）．Among the 90 patients,12 had abnormal conventional ventilation．The measured/predicted values of VCMAX,FVC75%,and FVC50% before and after treatment were not significantly different．The measured/predicted values of FVC,FEV₁,PEF,and FVC25% before treatment were lower than those after treatment,and the difference was statistically significant（P<0.05）．Conclusions There is good correlation between conventional ventilation and pulse oscillation．Airway resistance has a reverse effect on VCMAX and FVC．MP infected lobar pneumonia is mainly characterized by impaired small airway ventilation function and increased airway resistance．

目的 分析血流感染（BSI）患者血小板参数的动态变化及其在患者预后中的价值。方法 回顾性分析南通市中西医结合医院检验科明确BSI的66例患者,分为生存组（55例）和死亡组（11例）。比较不同组间病原菌分布及1周内血小板参数动态变化情况,并通过Logistic回归分析评估血小板参数动态变化的在治疗预后评估中的价值。结果 （1）BSI患者病原菌分为革兰氏阳性菌（G+）25株、革兰氏阴性菌（G-）39株、真菌2株;G+病原菌中前三位为金黄色葡萄球菌（10.61%）、表皮葡萄球菌（7.58%）、头状葡萄球菌（4.55%）;G-病原菌中前三位为大肠埃希菌（24.24%）、肺炎克雷伯菌肺炎亚种（15.15%）、肠炎沙门菌血清型（3.03%）;真菌为新生隐球酵母（1.52%）、光滑假丝酵母（1.52%）。（2）生存组序贯性器官功能衰竭评分（SOFA）评分为（3.24±0.53）分,低于死亡组的（6.02±1.17）分（t=12.535,P<0.001）;生存组BSI病程为（20.50±2.17）d,低于死亡组的（25.71±4.81）d（t=3.352,P<0.001）;生存组肺部原发感染灶30.91%,高于死亡组的63.64%（χ²=4.243,P=0.039）;生存组最大平均血小板体积（MPV）为（10.96±1.58）fL,低于死亡组的（11.99±1.42）fL（t=2.004,P=0.049）;生存组入院血小板计数（PLT）为（144.33±23.18）10⁹/L,低于死亡组的（166.91±20.29）10⁹/L（t=3.005,P=0.004）;生存组最低PLT为（113.48±30.76）10⁹/L,高于死亡组的（80.16±38.24）10⁹/L（t=3.148,P=0.002）。（3）两组入院及BSI时、BSI后4 d内的指标比较差异均无统计学意义（P>0.05）,在BSI后的5~7 d,生存组PLT为（210.83±102.37）10⁹/L,高于死亡组的（112.75±116.84）10⁹/L（t=2.835,P=0.006）;生存组MPV为（10.12±1.58）fL,低于死亡组的（11.27±1.85）fL（t=2.142,P=0.036）;生存组MPV/PLT 比值（MPR）为（5.69±2.89）,低于死亡组的（11.64±8.23）（t=4.290,P<0.001）。（4）多因素Logistic回归分析发现,入院SOFA（OR=5.461,95%CI：1.544~19.319,P=0.008）、BSI病程（OR=0.773,95%CI：0.622~0.960,P=0.020）、5~7 d MPR（OR=18.976,95%CI：1.776~202.709,P=0.015）是BSI的预测因素。结论 BSI患者血小板参数动态变化较为明显,而入院SOFA、BSI病程、5~7 d MPR对于预测患者死亡风险有重要意义。

目的 探讨住院儿童甲型流感病毒肺炎合并其他病原菌感染的临床特征。方法 通过回顾性研究方法,分析2021年6月—2023年6月广州市妇女儿童医疗中心住院治疗的153例甲型流感病毒肺炎患儿的临床资料,针对有无合并其他病原菌感染,分为混合感染组及非混合感染组两组,分别为98例及55例,分析并对比两组的临床特征。结果 甲型流感病毒肺炎患儿以发热、咳嗽、呕吐/腹泻等症状为主,其中混合感染组患儿呕吐/腹泻症状占比高于非混合感染组（P<0.05）;两组患儿其他症状及并发症对比差异无统计学意义（P>0.05）;儿童甲型流感病毒肺炎患儿检出合并细菌感染的患儿65例（29.41%）,合并肺炎支原体感染的患儿33例（21.57%）;合并病毒感染的患儿20例（13.07%）。与非混合感染组比较,混合感染组患儿乳酸脱氢酶水平更高,白细胞计数<4×10⁹/L的人数占比更少（P<0.05）;其他实验室指标对比差异无统计学意义（P>0.05）;经过抗病毒及对症治疗后,150例（98.04%）患儿痊愈出院,3例出现严重并发症,其均伴有其他病原菌感染。与非混合感染组比较,混合感染组患儿住院天数更长、住院费用更高（P<0.05）;其他预后指标对比差异无统计学意义（P>0.05）。结论 甲型流感病毒肺炎患儿易感染其他的病原菌,导致疾病治疗难度加大,因此临床要提高警惕,以防混合感染情况发生,尽早采取有效的诊治措施,提高疾病早期治愈率。

Objective To explore the clinical characteristics of hospitalized children with influenza A virus pneumonia complicated with other pathogens．Methods The clinical data of 153 children with influenza A virus pneumonia hospitalized in Guangzhou Women and Children Medical Center in the past two years（June 2021 ~ June 2023）were analyzed retrospectively． According to whether they were infected with other pathogens,they were divided into mixed infection group and non-mixed infection group,with 98 cases and 55 cases respectively．The clinical characteristics of the two groups were analyzed and compared．Results Fever,cough,vomiting and diarrhea were the main symptoms in children with influenza A virus pneumonia,and the proportion of vomiting and diarrhea in children with mixed infection group was higher than that in children without mixed infection group（P<0.05）．There was no significant difference in other symptoms and complications between the two groups（P>0.05）．There were 65 children（29.41%）with influenza A virus pneumonia and 33 children（21.57%）with mycoplasma pneumonia,20 children（13.07%）with virus infection．Compared with non-mixed infection group,the level of lactate dehydrogenase in children with mixed infection group was higher,and the proportion of children with white blood cell count<4×10⁹/L was less（P<0.05）．There was no significant difference in other laboratory indexes（P>0.05）．After antiviral and symptomatic treatment,150 cases（98.04%）were cured and discharged,and 3 cases had serious complications,all of which were accompanied by other pathogens．Compared with non-mixed infection group,children in mixed infection group had longer hospitalization days and higher hospitalization expenses（P<0.05）．There was no significant difference in other prognostic indicators（P>0.05）．Conclusions Children with influenza A virus pneumonia are easily infected with other pathogens,which makes it more difficult to treat the disease．Therefore,we should be vigilant in clinic to prevent mixed infection and take effective diagnosis and treatment measures as soon as possible to improve the early cure rate of the disease．

目的 探讨对于重症肺部感染患者采用药物+纤维支气管镜肺泡灌洗吸痰术治疗的效果。方法 选取2021年9月—2023年5月在郑州市第一人民医院ICU中94例肺部感染患者,分为观察组、对照组,对照组进行常规治疗,观察组采用药物+纤维支气管镜肺泡灌洗吸痰术治疗,对比两组患者的疗效、症状的缓解时间、炎性因子、实验室相关指标以及不良反应。结果 治疗后,观察组患者的治疗有效率91.49%高于对照组76.60%（χ²=3.887,P<0.05）,观察组患者的发热、肺部湿啰音、咳嗽以及咳痰等症状的缓解时间分别为（3.09±1.25）（4.17±2.24）（3.95±1.53）（4.05±1.77）d,均低于对照组（5.14±2.43）（7.03±3.23）（6.40±2.62）（6.32±1.81）d（t=5.143、4.988、5.536、6.147,P<0.05）,观察组的 C 反应性蛋白（C-reactive protein,CRP）、白细胞介素-6（Interleukin-6,IL-6）以及Toll样受体4（Toll-like receptor 4,TLR-4）水平分别为（3.64±0.87）mg/L、（54.59±10.65）ng/mL、（7.94±1.57）%,均低于对照组（7.51±1.43）mg/L、（87.66±11.17）ng/mL、（12.11±2.48）%（t=15.850、14.690、9.740,P<0.05）,观察组的气道压力、动脉血二氧化碳分压（partial pressure of carbon dioxide in artery,PaCO₂）水平分别为（6.92±3.60）cmH₂O、（43.19±6.29）mmHg,低于对照组（8.68±2.98）cmH₂O、（55.43±5.95）mmHg,观察组动脉氧分压（Partial arterial oxygen pressure,PaO₂）（86.06±5.31）mmHg、血氧饱和度（oxyhemoglobin saturation,SpO₂）（98.03±6.63）%高于对照组（68.04±5.19）mmHg、（90.22±5.51）%要高（t=2.582、9.692、16.638、6.221,P<0.05）,观察组中的不良反应发生率为2.13%与对照组10.64%比较差异无统计学意义（χ²=2.849,P>0.05）。结论 对处于ICU中的肺部感染患者治疗时,使用药物+纤维支气管镜肺泡灌洗吸痰术能够改善患者症状,降低炎性因子水平。

Objective To investigate the efficacy of medication combined with bronchoscopic alveolar lavage and sputum aspiration in ICU patients with severe pulmonary infection. Methods Ninety-four patients with pulmonary infection in the ICU of Zhengzhou First People's Hospital from September 2021 to May 2023 were selected and divided into observation group and control group．The control group received routine treatment,and the observation group was treated with medication and bronchoscopic alveolar lavage and sputum aspiration．The efficacy,duration of symptom remission,inflammatory factors,laboratory-related indicators and adverse reactions were compared between the two groups. Results After treatment,the effective rate of 91.49% in observation group was significantly higher than 76.60% in control group（χ²=3．887,P<0.05）．The relief time of fever,pulmonary rale,cough and sputum in observation group was（3.09±1.25）d,（4.17±2.24）d,（3.95±1.53）d,and（4.05±1.77）d,respectively,which were significantly lower than the control group[（5.14±2.43）d,（7.03±3.23）d,（6.40±2.62）d and（6.32±1.81）d]（t=5.143,4.988,5.536,6.147,P<0.05）．The levels of CRP,IL-6 and TLR-4 in the observation group were（3.64±0.87）mg/L,（54.59±10.65）ng/mL and（7.94±1.57）%,respectively．They were significantly lower than（7.51±1.43）mg/L,（87.66±11.17）ng/mL and（12.11±2.48）% in the control group（t=15.850,14.690,9.740,P<0.05）．The airway pressure and PaCO₂ levels of the observation group were（6.92±3.60）cmH₂O and（43.19±6.29）mmHg,respectively,which were significantly lower than those of the control group[（8.68±2.98）cmH₂O and（55.43±5.95）mmHg]．The levels of PaO₂[（86.06±5.31）mmHg] and SpO₂[（98.03±6.63）%] in the observation group were higher than those in the control group[（68.04±5.19）mmHg and（90.22±5.51）%],and there were statistically significant differences（t=2.582,9.692,16.638,6.221,P<0.05）．The adverse reactions of 2.13% in the observation group were lower than 10.64% in the control group,and there was no statistically significant difference（χ²=2.849,P>0.05）. Conclusions In ICU patients with severe lung infection,the treatment of drugs combined with alveolar lavage and fiberoptic bronchoscopic aspiration is better,and can significantly improve the symptoms and inflammatory factor levels of patients．