革兰阴性菌和革兰阳性菌血流感染危重患者中致炎症反应的比较_吴志恒

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中国感染与化疗杂志2012年1月20日第12卷第1期Chin J Infect Chemother,Jan.2012,Vol.12,No.1

·论著·

革兰阴性菌和革兰阳性菌血流感染危重患者中

致炎症反应的比较

吴志恒1, 郭玉霞1, 卜 婧1, 郭翠翠1, 谢 佳1, 穆 玉2

摘要: 目的 比较医院感染革兰阴性菌血流感染和革兰阳性菌血流感染的炎性介质指标,观察革兰阴性菌血流感染和革兰阳性菌血流感染导致炎症反应的程度。方法 前瞻性分析入住ICU48 h后血培养阳性患者的性别,年龄,APACHEⅡ和SOFA评分,慢性疾病史,病情严重程度,静脉营养,接受手术或外科操作,机械通气支持和血液净化治疗,混合细菌血流感染,入住ICU时间及医院内病死率情况。比较革兰阴性菌血流感染和革兰阳性菌血流感染患者的体温,心率,白细胞(WBC)数量,中性粒细胞(NEU)数量,淋巴细胞(LYM)数量,C-反应蛋白(CRP),降钙素原(PCT),肿瘤坏死因子-α(TNF-α),白介素-1β(IL-1β)和白介素-6(IL-6)水平。结果 与革兰阳性菌血流感染相比,革兰阴性菌血流感染组有更多的患者表现为严重脓毒症或脓毒性休克[(88.9%∶73.0%,P=0.003)],高血清TNF-α[(0.97±0.54)∶(0.75±0.32),P=0.029]和IL-1β[(7.03±0.12)∶(2.21±0.09),P=0.006]和IL-6[(10.59±2.48)∶(2.55±0.75),P=0.005]水平。结论 革兰阴性菌血流感染患者较革兰阳性菌血流感染患者的临床病情更加严重,表现为更加严重的炎症反应,在血流感染的临床治疗中应考虑病原菌的致病机制和宿主的反应程度。

关键词: 血流感染; 炎性反应; 炎症介质

中图分类号:R515.3 文献标志码:A 文章编号:1009-7708(2012)01-0027-05

Comparison of inflammatory reaction between gram-negative and gram-positivebloodstream infections in critical patients

WU Zhiheng,GUO Yuxia,BU Jing,GUO Cuicui,XIE Jia,MU Yu. (Department of Pharmacy,Affiliated Hospital of Medical College of Chinese People’s Armed Police Forces,Tianjin 300161,China)

Abstract: Objective To investigate the extent of inflammatory reaction induced by nosocomial gram-negative or gram-positive blood-stream infections through comparing some clinical indicators and levels of inflammatory mediators.Methods Prospective analysis wasconducted in patients with positive blood culture obtained 48 h after admission to ICU,in terms of patient gender,age,APACHEⅡand Sequential organ failure assessment(SOFA)scores,underlying diseases,severity of infection,total parenteral nutrition,receivingoperation or surgical procedure,mechanical ventilation,blood purification therapy,mixed bacterial bloodstream infection,length of ICUstay and in hospital mortality.The parameters such as temperature,heart rate,WBC count,neutrophils,lymphocytes,levels of C-re-active protein,calcitonin,tumor necrosis factor-α(TNF-α),interleukin-1β(IL-1β)and interleukin-6(IL-6)were also compared be-tween the patients with gram-positive bloodstream infection and those with gram-negative bloodstream infection.Results The incidenceof severe sepsis and septic shock was significantly higher in the patients with gram-negative bloodstream infection than in those withgram-positive bloodstream infection(88.9%vs.73%,P=0.003).Blood levels of TNF-α(0.97±0.54 vs.0.75±0.32,P=0.029),IL-1β(7.03±0.12 vs.2.21±0.09,P=0.006)and IL-6(10.59±2.48 vs.2.55±0.75,P=0.005)increased morein the patients with gram-negative bloodstream infection than in the patients in gram-positive bloodstream infection.Conclusions Thepatients with gram-negative bloodstream infection show more severe clinical condition and inflammatory reaction than the patients withgram-positive bloodstream infection.The pathogenic mechanism and extent of the host inflammatory response should be consideredwhen treating bloodstream infections in clinical practice.

Key words: bloodstream infection; inflammatory reaction; inflammatory mediator

 作者单位:1.武警医学院附属医院药剂科,天津 300161;

2.天津医科大学总医院。

 作者简介:吴志恒(1971—),男,主管药师,主要从事临床药学的研究。

 通信作者:穆玉,E-mail:muyu9459@sina.com。

近年来重症医学水平有了很大的提高,但入住ICU患者中脓毒症的病死率仍然居高不下[1]。在导致脓毒症的各类感染中,医院内血流感染被认为是影响脓毒症预后的严重因素,有报道称其归因病死率约占35%[2]。已有大规模的流行病学研究调

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