敷料更换的不同次数对穿刺引流术后穿刺口感染的影响

目的 研究敷料更换的不同次数对穿刺引流术后穿刺口感染的影响.方法 随机将该院2013年6月—2014年7月收治的100位进行穿刺引流术的患者分为两组,50例为A组,50例为B组. 为A组患者1周更换1次敷料,B组患者1周更换2次敷料. 对两组患者穿刺口感染的情况进行分析比较. 结果 A组患者穿刺口感染的几率显著低于B组(P<0.05),A组患者的病原菌定植率显著低于B组(P<0.05),两组患者导管相关性血流感染率差异无统计学意义(P>0.05). 结论 穿刺引流术后的患者1周更换1次敷料比较合理,既能降低患者术后穿刺口感染的几率,又能降低医护人员的工作量,但要注意在敷料发生松动或者潮湿时也要及时进行更换.     

在生物化学教学中培养医学生的科研创新能力

在教学过程中潜移默化培养医学生的科研创新能力，是实践新时代医学教育改革新理念的有益探索。生物化学是医学生的重要专业基础课程之一，探讨在生物化学教学过程中通过多种教学方法培养学生对科研的兴趣，同时，结合科研新进展，开拓学生的视野，培养学生的创新思维，提高医学生科研创新能力的思路。     

Stage 1 acute kidney injury is independently associated with infection following cardiac surgery

ObjectivesSevere acute kidney injury (AKI) is a known risk factor for infection and mortality. However, whether stage 1 AKI is a risk factor for infection has not been evaluated in adults. We hypothesized that stage 1 AKI following cardiac surgery would independently associate with infection and mortality.MethodsIn this retrospective propensity score–matched study, we evaluated 1620 adult patients who underwent nonemergent cardiac surgery at the University of Colorado Hospital from 2011 to 2017. Patients who developed stage 1 AKI by Kidney Disease Improving Global Outcomes creatinine criteria within 72 hours of surgery were matched to patients who did not develop AKI. The primary outcome was an infection, defined as a new surgical-site infection, positive blood or urine culture, or development of pneumonia. Secondary outcomes included in-hospital mortality, stroke, and intensive care unit (ICU) and hospital length of stay (LOS).ResultsStage 1 AKI occurred in 293 patients (18.3%). Infection occurred in 20.9% of patients with stage 1 AKI compared with 8.1% in the no-AKI group (P < .001). In propensity-score matched analysis, stage 1 AKI independently associated with increased infection (odds ratio [OR]; 2.24, 95% confidence interval [CI], 1.37-3.17), ICU LOS (OR, 2.38; 95% CI, 1.71–3.31), and hospital LOS (OR, 1.30; 95% CI, 1.17-1.45).ConclusionsStage 1 AKI is independently associated with postoperative infection, ICU LOS, and hospital LOS. Treatment strategies focused on prevention, early recognition, and optimal medical management of AKI may decrease significant postoperative morbidity.     

手术室细节护理管理在医院感染控制中的应用评价

目的探讨手术室细节护理管理在医院感染控制中的应用效果。方法选定2017年1月-2018年3月该院收诊的160例手术室患者,按照管理方法的不同分为观察组(细节护理管理)80例与对照组(传统护理管理)80例,比较两组手术室患者的护理质量、并发症发生率、感染发生率、护理满意度、收缩压。结果观察组护理管理后的护理安全(82.23±6.14)分、体征监测(93.46±6.23)分、体位协助(87.32±4.65)分、器械准备(91.57±6.21)分、文书记录(90.24±4.92)分、护理满意率(98.75%)均高于对照组(P<0.05);观察组护理管理后的并发症发生率(2.50%)、感染发生率(1.25%)、收缩压(121.37±6.26)mmHg均低于对照组(P<0.05)。结论细节护理管理方法可有效提高手术室患者的护理满意度,减少其感染情况,值得推广使用。     

84例产褥感染的临床特点及常见致病微生物耐药性分析

目的 研究产褥感染的危险因素及常见致病微生物耐药情况，为临床治疗提供参考。方法 回顾性分析我院2017 年1 月～2019 年12 月发生的84 例产褥感染病例的临床资料，与同时期未发生产褥感染的200 例产妇进行对照研究，分析产褥感染的影响因素，并对分离获得的致病微生物进行耐药性分析。结果 感染组妊娠糖尿病、产钳助产、宫口开全后中转剖宫产患者的分布率高于对照组，差异有统计学意义（P＜0.05）；经多因素Logistic 回归分析，妊娠糖尿病是产褥感染的独立影响因素（P＜0.05）。本研究中共检出致病微生物40 株，其中革兰阴性菌13 株（占32.50%），革兰阳性菌10 株（占25.00%），支原体16 株（占40.00%），衣原体1 株（占2.50%），革兰阴性菌中以大肠埃希菌最常见，对二代头孢菌素类抗生素耐药率20%。革兰阳性菌以金黄色葡萄球菌最常见，对青霉素及头孢菌素耐药率高，未发现对亚胺培南及万古霉素耐药。结论 产钳助产、妊娠糖尿病、宫口开全后中转剖宫产是产褥感染可能的危险因素，其中，妊娠糖尿病是产褥感染的独立危险因素。目前临床常见致病微生物谱及耐药率未发生明显变化。     

Therapeutics and delivery vehicles for local treatment of osteomyelitis

Osteomyelitis, or the infection of the bone, presents a major complication in orthopedics and may lead to prolonged hospital visits, implant failure, and in more extreme cases, amputation of affected limbs. Typical treatment for this disease involves surgical debridement followed by long-term, systemic antibiotic administration, which contributes to the development of antibiotic-resistant bacteria and has limited ability to eradicate challenging biofilm-forming pathogens including Staphylococcus aureus—the most common cause of osteomyelitis. Local delivery of high doses of antibiotics via traditional bone cement can reduce systemic side effects of an antibiotic. Nonetheless, growing concerns over burst release (then subtherapeutic dose) of antibiotics, along with microbial colonization of the nondegradable cement biomaterial, further exacerbate antibiotic resistance and highlight the need to engineer alternative antimicrobial therapeutics and local delivery vehicles with increased efficacy against, in particular, biofilm-forming, antibiotic-resistant bacteria. Furthermore, limited guidance exists regarding both standardized formulation protocols and validated assays to predict efficacy of a therapeutic against multiple strains of bacteria. Ideally, antimicrobial strategies would be highly specific while exhibiting a broad spectrum of bactericidal activity. With a focus on S. aureus infection, this review addresses the efficacy of novel therapeutics and local delivery vehicles, as alternatives to the traditional antibiotic regimens. The aim of this review is to discuss these components with regards to long bone osteomyelitis and to encourage positive directions for future research efforts.     

铜绿假单胞菌噬菌体PaP3生物学特性的研究

目的测定铜绿假单胞菌噬菌体PaP3的最佳感染复数、一步生长曲线和吸附K值及交叉吸附K值等基本生物学特性。方法按照感染复数（MOI）分别为0．0001、0．001、0．01、0．1、1和10加入噬菌体纯培养液和宿主菌，充分裂解细菌后，测定噬菌体滴度；以MOI=10的比例加入噬菌体及宿主菌，进行一步生长实验；纯化PaP3颗粒，免疫家兔，获得抗血清，通过中和反应实验测定PaP3和其抗血清之间的吸附反应常数K值。同时，利用抗血清交叉中和试验确定本室分离的三株噬菌体之间的血清学关系。结果当MOI=0．001时PaP3感染其宿主菌产生的子代噬菌体滴度最高；根据一步生长实验结果绘制一步生长曲线；通过血清交叉中和反应得出不同的吸附常数。结论PaP3最佳感染复数为0．001，感染宿主菌的潜伏期是20min，爆发期是60min，平均爆发量约为31，其抗血清反应的吸附常数K值为262。     

Bacteroides forsythus ATCC43037菌体蛋白与人类唾液酸性富脯蛋白的相互作用

目的：探讨福赛类杆菌与人类唾液富脯蛋白相互作用的蛋白分子。方法：Western—blot方法。将人工合成唾液富脯蛋白用生物素标记，福赛类杆菌全菌蛋白凝胶电泳，半干转移至纤维膜上，观察二者的相互作用。结果：富脯蛋白能与分子量为85KD、65KD、60KD、以及49KD的福赛类杆菌蛋白发生结合。结论：福赛类杆菌存在与人类唾液富脯蛋白相互结合的粘附素。     

影响颅脑外伤术后颅内感染的危险因素分析

目的探讨影响颅脑外伤开颅术后颅内感染的危险因素。方法采用回顾性研究比较分析了912例颅脑损伤术后出现颅内感染与未出现颅内感染组间的差异因素。结果非感染 770例,颅内感染142例(15．6％)。感染类型有无菌性脑膜炎、细菌性脑膜炎、脑室炎及脑室积脓、脑脓肿、硬膜下腔积脓、术区皮下或(和)骨瓣下化脓或合并骨髓炎、切口感染。细菌检出率占感染的27．5％。颅脑外伤术后感染与高温季节、高龄、重度以上损伤、短期内两次以上手术、连续两侧开颅术、长时间 (>5 h)手术、显微外科手术、颅底与后颅凹手术、脑室外引流、皮下或硬膜外积液以及急诊手术等因素相关(P<0．05)。结论对具有上述危险冈素的易感患者应给予更密切的关注和预防性的处理。     

创伤后脓毒症的治疗进展

创伤感染所导致的脓毒症及其它并发症是临床治疗的难点，笔者对脓毒症近年来的治疗进展加以综述。