Objective To study endotoxin release induced by differential antibiotics in gram negative bacterial infection. Methods Thirty critical patients accompanied with gram negative bacterial infection were divided into group A (imipenem group, n=15) and group B (ceftazidine group, n=15). Imipenem (0.5 g iv q8h) and ceftazidine (1.0 g iv q8h) were given respectively. White blood cell (WBC), systolic blood pressure (SBP), lipopoly sacchride (LPS), tumor necrosis factor alpha (TNFα) and high density lipoprotein (HDL) were determined in 0, 1, 2, 3, 5 and 7 day. Results There was no difference in the change of WBC between two groups. Group A had a more stable SBP than group B. There was lower endotoxin release in group A than in group B and so were the cytokines release. HDL level was lower in group B than in group A. Conclusion Imipenem has lower endotoxinliberating potential than ceftazidine and mediate lower cytokines release. HDL may protect the patients from LPS damage.
In order to choose the appropriate antibiotics for treating secondary pancreatic infection, permeability of antibiotics to pancreatic tissue was investigated on experimental dogs with acute hemorrhagic necrotizing pancreatitis. The concentrations of 8 different antibiotics were determined in the blood and the pancreatic tissue using highperformance liquid chromatography. Pancreatic tissue permeability of Cefotaxime, Ofloxacin, Amikacin, Piperacllin, Cefoperazone, Ampicillin, Metronidazole and Ciprofloxacin was 12%, 19%, 20%, 46%, 55%, 63%, 71% and 132% respectively. The study shows that this eight antibiotics have different permeability to the pancreatic tissue. Such observations support the existence of a bloodpancreas barrier, which acts to restrict the permeation of antibiotics into the pancreas. The results suggest that antibiotics with high permeability rate be used to treat the patient with secondary pancreatic infection.
截止至2002年5月,现有早产治疗的临床证据如下: (1) 高危早产:在一些国家实施的RCT发现,在降低早产危险方面,加强产前保健与普通产前保健没有明显差异.包括5个RCT的1个系统评价发现,对有宫颈改变的妇女行宫颈环扎术有不同的结果,没有明确的结论.1个大样本的RCT发现,孕9～29周宫颈功能可能不全的妇女进行预防性宫颈环扎手术与不环扎相比,能明显降低早产(＜33孕周),但也会明显增加产褥感染的危险.另外4篇较小样本的RCT发现,孕10～30周、具各种早产高危因素的妇女,进行预防性宫颈环扎手术与不环扎相比,并不能降低早产(＜34孕周).1篇系统评价的2个RCT报告,对有宫颈改变的妇女进行环扎术有不同的结果,其中1个RCT发现其并不能明显降低早产(＜34孕周),而另外1个较小样本的RCT却发现宫颈环扎手术加卧床休息与单纯卧床休息比较,能明显降低34周前的早产.没有1个RCT证实行环扎术加卧床休息与单纯卧床休息相比,能降低围生儿死亡率. (2) 胎膜早破:1个系统评价发现,对胎膜早破的妇女,抗生素较安慰剂能明显延长孕周、降低新生儿发病率的危险,如新生儿感染、出生后氧疗、脑部超声异常等.阿莫西林加克拉维酸治疗与新生儿坏死性小肠结肠炎的发生率明显增加有关.一个基于1个RCT的系统评价发现,没有充足的证据证实羊膜腔灌注与不灌注比较能改善胎膜早破后的新生儿结局. (3) 先兆早产的治疗:①β-肾上腺素兴奋剂:1个系统评价发现,β-肾上腺素兴奋剂与安慰剂或不治疗相比,并不能明显降低围生儿死亡率、呼吸窘迫综合征及低体重儿(＜2 500 g)发生率,且与与安慰剂或不治疗相比,β-肾上腺素兴奋剂增加孕母副反应,如胸痛、心悸、呼吸困难、震颤、恶心、呕吐、头痛、高血糖、低钾血症.②钙离子通道拮抗剂: 没有关于钙离子通道拮抗剂与安慰剂比较的系统评价或RCT.1个系统评价发现,钙离子通道抑制剂与其它保胎药(主要是β-肾上腺受体兴奋剂)比较,能显著降低48 h内的早产分娩,减少因孕母副反应退出治疗和新生儿发病率.③硫酸镁:1个系统评价发现,硫酸镁与安慰剂比较,并不能明显降低孕36周前的早产率、围生儿死亡率、呼吸窘迫综合征的发生率.另一个系统评价发现,硫酸镁和其他宫缩抑制剂(β-肾上腺素兴奋剂、钙离子通道拮抗剂、前列腺素合成抑制剂、硝化甘油、酒精和葡萄糖注射剂)比较,并不能明显降低48 h内早产率(尽管结果没有差异).④垂体受体拮抗剂(阿托西班):1个系统评价纳入 2个RCT,对阿托西班和安慰剂治疗早产进行比较有不同的结果.较大样本的RCT发现,阿托西班较安慰剂能延长孕周,但阿托西班增加了孕28周以下的胎儿死亡率.另一个RCT发现,阿托西班增加了48 h内的早产.⑤前列腺素抑制剂(消炎痛):1个系统评价发现,消炎痛与安慰剂比较,能明显降低孕37周前的48 h和7天的早产率的证据有限.然而,同时发现消炎痛与安慰剂或不治疗相比,并不能明显降低围生儿死亡率、新生儿呼吸窘迫综合征、肺支气管发育不良、坏死性小肠结肠炎、新生儿败血症或低体重儿.但这个系统评价样本太小,尚不能发现有临床意义的差异. (4) 择期或非择期剖宫产对早产妇女治疗效果:1个系统评价结果发现,择期剖宫产较非择期剖宫产会增加孕母的发病率,却不能降低新生儿的发病率和死亡率.但尚不能证明此效果是否对新生儿有临床意义. (5) 改善早产妊娠结局的干预措施:①对早产者采用皮质类固醇:1个系统评价认为,对可能发生早产的妇女使用皮质激素较安慰剂或不处理能明显降低早产儿出生后呼吸窘迫综合征、新生儿死亡率和颅内出血的发生.②促甲状腺激素释放激素在早产中的运用:1个系统评价发现,在早产的高危妇女中,促甲状腺激素释放激素和类固醇激素联合应用与单用皮质类固醇激素比较,对新生儿结局的影响无明显差异,但会明显增加孕母和胎儿的不良反应.③抗生素:1个系统评价发现,抗生素与安慰剂比较,不能延长孕周、降低新生儿死亡率,但可降低孕母感染率.
Objectives We tended to evaluate the effectiveness of prophylactic antibiotics for preventing meningitis in patients with BSF. Method We searched the Cochrane Register of Controlled Trials (CENTRAL) (The Cochrane Library Issue 3, 2005), MEDLINE (1966 to September 2005), EMBASE (1974 to June 2005), and LILACS (1982 to September 2005). We also performed an electronic search of meeting proceedings from the American Association of Neurological Surgeons (1997 to September 2005) and handsearched the abstracts of meeting proceedings of the European Association of Neurosurgical Societies (1995, 1999 and 2003). Randomized controlled trials (RCTs) comparing any antibiotic versus placebo or no intervention were identified. We also identified non-RCTs to perform a separate meta-analysis to compare results. At least two authors independently appraised the quality and extracted the data of each trial. Meta-analysis was conducted using RevMan 4.2 software. Results Five RCTs and 17 non-RCTs comparing different types of antibiotic prophylaxis with placebo or no intervention in patients with BSF were identified. Most trials presented insufficient methodological detail. All studies included meningitis in their primary outcome. Overall, we evaluated 208 participants from the four RCTs that were considered suitable for inclusion in the meta-analysis. There were no significant differences between antibiotic prophylaxis groups and control groups in terms of reduction of the frequency of meningitis, all-cause mortality, meningitis-related mortality, and need for surgical correction in patients with CSF leakage. We performed a subgroup analysis to evaluate the primary outcome in patients with and without CSF leakage. We also completed a meta-analysis of all the identified controlled non-RCTs (enrolling a total of 2 168 patients), producing results consistent with the randomised data. Conclusions Currently available evidence from RCTs does not support prophylactic antibiotic use in patients with BSF, whether there is evidence of CSF leakage or not. Until more research is completed, the effectiveness of antibiotics in patients with BSF cannot be determined because studies published to date are flawed by biases. Large, appropriately designed RCTs are needed.
目的：探讨儿童血液肿瘤并发感染的病原菌分布及对抗生素的敏感性，以指导临床治疗。方法:回顾性分析从儿童血液肿瘤患者收集的标本中分离的病原菌及药敏实验资料。结果:共送检321份标本，检出致病菌94株，检出率29.3%，其中革兰氏阴性菌51株(54.3%)、革兰氏阳性菌33株(35.1%)、真菌10株(10.6%)；除铜绿假单胞菌外，革兰氏阴性杆菌对亚胺培南、美洛培南的耐药率较低(lt;15%)，对其他抗生素耐药性较高，三种主要革兰氏阴性菌大肠埃希氏菌、肺炎克雷伯菌、铜绿假单胞菌对氨苄西林几乎耐药(gt;90%)；革兰氏阳性球菌对替考拉宁耐药率较低，对其他抗生素耐药性较高，未检出耐万古霉素菌株。结论:儿童血液肿瘤并发感染的病原菌以革兰氏阴性菌为主。抗生素的大量使用，使革兰氏阴性菌和阳性菌的耐药率都增高，应根据细菌培养及药敏实验指导临床合理使用抗生素。
ObjectiveTo systematically review the efficacy of antibiotics on the outcomes of patients with non-small cell lung cancer (NSCLC) treated with immune checkpoint inhibitors. MethodsPubMed, EMbase, Web of Science, The Cochrane Library, CNKI, WanFang Data, VIP and CBM databases were electronically searched to collect cohort studies on efficacy of antibiotics on the outcomes of patients with NSCLC treated with immune checkpoint inhibitors from inception to August 1st, 2021. Two reviewers independently screened literature, extracted data, and evaluated the risk of bias of the included studies. Meta-analysis was then performed by using RevMan 5.3 software. ResultsA total of 27 cohort studies involving 7 087 patients were included. The results of meta-analysis showed that antibiotic use was associated with poor overall survival (OS) (HR=2.04, 95%CI 1.68 to 2.49, P<0.000 01) and progression free survival (PFS) (HR=1.63, 95%CI 1.35 to 1.99, P<0.000 01). ConclusionCurrent evidence shows that antibiotic use is associated with poor OS and PFS. Due to the limited quality and quantity of the included studies, more high-quality studies are needed to verify the above conclusion.
Objective To investigate the value of procalcitonin-guided treatment on antibiotic use in severe acute exacerbations of asthma. Methods From April 2008 to December 2010, a total of 77 patients with severe acute exacerbations of asthma were randomly assigned into a PCT group ( n =38) and a control group ( n=39) . The serum concentration of procalcitonin ( PCT) were measured in all patients. On the base of similar routine treatment, the control group received antibiotics based on the physician’s decision.Meanwhile the PCT group were treated with antibiotics according to serum PCT levels: antibiotic treatment was applied with PCT level ≥0. 25ng/mL and was discontinoued with PCT level lt; 0. 25ng/mL. Length of hospitalization, duration of antibiotics, cost of antibiotics, clinical efficacy were observed. Results The duration of antibiotics use in the PCT group [ 7 ( 5 ～11) d] was shorter than that in the control group [ 11( 7 ～16) d] ( Z = - 2. 26, P = 0. 025) , and the cost of antibiotics in the PCT group [ 2125( 1560 ～4347) yuan] was lower than that in the control group [ 3588 ( 2677 ～5280) yuan] ( Z = - 2. 01, P =0. 033) . The clinical efficacy and length of hospitalization were similar in two groups ( P gt; 0. 05) .Conclusion PCT guidance can reduce antibiotic duration and antibiotic cost in treatment of acute severe exacerbations of asthma.
目的 探讨鲍曼不动杆菌感染的临床分布及药敏情况。 方法 对2009年1月－2011年12月的微生物送检标本进行统计分析，鲍曼不动杆菌2009年培养出19株，2010年29株（多重耐药菌株1株），2011年35株（多重耐药菌株2株），并对其分布的标本类型、科室及耐药情况进行分析。 结果 鲍曼不动杆菌在痰中检出率最高；科室分布依次为重症监护室（ICU）、神经外科、呼吸科；该菌对亚胺培南敏感性最高，对青霉素和头孢类抗生素耐药率均在55%以上。 结论 鲍曼不动杆菌感染患者的经验性抗生素治疗应根据其地区、医院最新的院内感染病原体分布及耐药性，合理选择抗生素；病情、高龄、免疫抑制剂、机械通气、多种侵入性操作及抗生素的使用为鲍曼不动杆菌医院感染危险因素；ICU存在多重耐药鲍曼不动杆菌的感染，应加以控制。