Stephen Y. Liang

Current strategies for the prevention and management of central line-associated bloodstream infections

Central venous catheters are an invaluable tool for diagnostic and therapeutic purposes in today’s medicine, but their use can be complicated by bloodstream infections (BSIs). While evidence-based preventive measures are disseminated by infection control associations, the optimal management of established central line-associated BSIs has been summarized in infectious diseases guidelines. We prepared an overview of the state-of-the-art of prevention and management of central line-associated BSIs and included topics such as the role of antibiotic-coated catheters, the role of catheter removal in the management, and a review of currently used antibiotic compounds and the duration of treatment.

qSOFA Has Poor Sensitivity for Prehospital Identification of Severe Sepsis and Septic Shock

Abstract Objectives: Sepsis is a common and deadly disease process for which early recognition and intervention can significantly improve clinical outcomes. Despite this, sepsis remains underrecognized and therefore undertreated in the prehospital setting. Recent recommendations by the Society of Critical Care and European Society of Intensive Care Medicine advocate use of the qSOFA (quick Sequential [Sepsis-related] Organ Failure Assessment) score in non-ICU settings to screen for septic patients at greater risk for poor outcomes. Methods: We retrospectively evaluated the sensitivity and specificity of a prehospital qSOFA score ≥ 2 for prehospital identification of patients with severe sepsis or septic shock. Emergency Department (ED) patients with confirmed or suspected infection were classified as having infection without sepsis (n = 71), sepsis (n = 38), or severe sepsis/septic shock (n = 43), where designation of severe sepsis/septic shock required evidence of end-organ dysfunction, hypoperfusion (lactate > 2), or vasopressor requirement. Results: We found that a prehospital qSOFA score ≥ 2 was 16.3% sensitive (95% CI 6.8–30.7%) and 97.3% specific (95% CI 92.1–99.4%) for patients ultimately confirmed to have severe sepsis/septic shock in the ED. Adding an additional point to the prehospital qSOFA score for a pulse > 100, nursing home residence, age > 50, or reported fever increased the sensitivity to 58.1% (95% CI 42.1–73.0%) and decreased the specificity to 78.0% (95% CI 69.0–85.4%). During their ED stay, approximately two-thirds of patients meeting severe sepsis/septic shock criteria eventually met qSOFA criteria with a sensitivity of 67.4% (95% CI 51.5–80.9) and specificity of 86.2% (95% CI 78.3–92). Failure to meet qSOFA criteria prehospital was predominantly due to a systolic blood pressure and respiratory rate that did not yet meet predetermined thresholds. Conclusions: These findings suggest that the dynamic nature of sepsis can make sensitive detection difficult in the prehospital setting, although combining qSOFA with other clinical information (age, nursing home status, fever, and tachycardia) can identify more patients with sepsis who may benefit from time critical interventions.

Update on emerging infections: news from the Centers for Disease Control and Prevention. Vital signs: central line-associated blood stream infections--United States, 2001, 2008, and 2009.

Background: Health care-associated infections (HAIs) affect 5% of patients hospitalized in the United States each year. Central line-associated bloodstream infections (CLABSIs) are important and deadly HAIs, with reported mortality of 12% to 25%. This article provides national estimates of the number of CLABSIs among patients in ICUs, inpatient wards, and outpatient hemodialysis facilities in 2008 and 2009 and compares ICU estimates with 2001 data. Methods: To estimate the total number of CLABSIs among patients aged 1 year or older in the United States, Centers for Disease Control and Prevention (CDC) multiplied central line use and CLABSI rates by estimates of the total number of patient-days in each of 3 settings: ICUs, inpatient wards, and outpatient hemodialysis facilities. CDC identified total inpatient-days from the Healthcare Cost and Utilization Projects National Inpatient Sample and from the Hospital Cost Report Information System. Central line use and CLABSI rates were obtained from the National Nosocomial Infections Surveillance System for 2001 estimates (ICUs only) and from the National Healthcare Safety Network for 2009 estimates (ICUs and inpatient wards). CDC estimated the total number of outpatient hemodialysis patient-days in 2008 by using the single-day number of maintenance hemodialysis patients from the US Renal Data System. Outpatient hemodialysis central line use was obtained from the Fistula First Breakthrough Initiative, and hemodialysis CLABSI rates were estimated from the National Healthcare Safety Network. Annual pathogen-specific CLABSI rates were calculated for 2001 to 2009. Results: In 2001, an estimated 43,000 CLABSIs occurred among patients hospitalized in ICUs in the United States. In 2009, the estimated number of ICU CLABSIs had decreased to 18,000. Reductions in CLABSIs caused by Staphylococcus aureus were more marked than reductions in infections caused by Gram-negative rods, Candida spp, and Enterococcus spp. In 2009, an estimated 23,000 CLABSIs occurred among patients in inpatient wards, and in 2008, an estimated 37,000 CLABSIs occurred among patients receiving outpatient hemodialysis. Conclusion: In 2009 alone, an estimated 25,000 fewer CLABSIs occurred in US ICUs than in 2001, a 58% reduction. This represents up to 6,000 lives saved and

Infection Prevention in the Emergency Department

414 million in potential excess health care costs in 2009 and approximately

Travel advice for the immunocompromised traveler: prophylaxis, vaccination, and other preventive measures

1.8 billion in cumulative excess health care costs since 2001. A substantial number of CLABSIs continue to occur, especially in outpatient hemodialysis centers and inpatient wards. Implications for Public Health Practice: Major reductions have occurred in the burden of CLABSIs in ICUs. State and federal efforts coordinated and supported by CDC, the Agency for Healthcare Research and Quality, and the Centers for Medicare & Medicaid Services and implemented by numerous health care providers likely have helped drive these reductions. The substantial number of infections occurring in non-ICU settings, especially in outpatient hemodialysis centers, and the smaller decreases in non-S aureus CLABSIs reveal important areas for expanded prevention efforts. Continued success in CLABSI prevention will require increased adherence to current CLABSI prevention recommendations, development and implementation of additional prevention strategies, and the ongoing collection and analysis of data, including specific microbiologic information. To prevent CLABSIs in hemodialysis patients, efforts to reduce central line use for hemodialysis and improve the maintenance of central lines should be expanded. The model of federal, state, facility, and health care provider collaboration that has proven so successful in CLABSI prevention should be applied to other HAIs and other health care-associated conditions.

Empiric Antimicrobial Therapy in Severe Sepsis and Septic Shock: Optimizing Pathogen Clearance

Infection prevention remains a major challenge in emergency care. Acutely ill and injured patients seeking evaluation and treatment in the emergency department (ED) not only have the potential to spread communicable infectious diseases to health care personnel and other patients, but are vulnerable to acquiring new infections associated with the care they receive. This article will evaluate these risks and review the existing literature for infection prevention practices in the ED, ranging from hand hygiene, standard and transmission-based precautions, health care personnel vaccination, and environmental controls to strategies for preventing health care-associated infections. We will conclude by examining what can be done to optimize infection prevention in the ED and identify gaps in knowledge where further research is needed. Successful implementation of evidence-based practices coupled with innovation of novel approaches and technologies tailored specifically to the complex and dynamic environment of the ED are the keys to raising the standard for infection prevention and patient safety in emergency care.

Assessment of healthcare worker protocol deviations and self-contamination during personal protective equipment donning and doffing

Immunocompromised patients are traveling at increasing rates. Physicians caring for these complex patients must be knowledgeable in pretravel consultation and recognize when referral to an infectious disease specialist is warranted. This article outlines disease prevention associated with international travel for adults with human immunodeficiency virus, asplenia, solid organ and hematopoietic transplantation, and other immunosuppressed states. While rates of infection may not differ significantly between healthy and immunocompromised travelers, the latter are at greater risk for severe disease. A thorough assessment of these risks can ensure safe and healthy travel. The travel practitioners’ goal should be to provide comprehensive risk information and recommend appropriate vaccinations or prevention measures tailored to each patient’s condition. In some instances, live vaccines and prophylactic medications may be contraindicated.

Sepsis and Other Infectious Disease Emergencies in the Elderly.

Mortality and morbidity in severe sepsis and septic shock remain high despite significant advances in critical care. Efforts to improve outcome in septic conditions have focused on targeted, quantitative resuscitation strategies utilizing intravenous fluids, vasopressors, inotropes, and blood transfusions to correct disease-associated circulatory dysfunction driven by immune-mediated systemic inflammation. This review explores an alternate paradigm of septic shock in which microbial burden is identified as the key driver of mortality and progression to irreversible shock. We propose that clinical outcomes in severe sepsis and septic shock hinge upon the optimized selection, dosing, and delivery of highly potent antimicrobial therapy.

A Clinical Decision Rule Identifies Risk Factors Associated With Antimicrobial-Resistant Urinary Pathogens in the Emergency Department A Retrospective Validation Study

OBJECTIVE To evaluate healthcare worker (HCW) risk of self-contamination when donning and doffing personal protective equipment (PPE) using fluorescence and MS2 bacteriophage. DESIGN Prospective pilot study. SETTING Tertiary-care hospital. PARTICIPANTS A total of 36 HCWs were included in this study: 18 donned/doffed contact precaution (CP) PPE and 18 donned/doffed Ebola virus disease (EVD) PPE. INTERVENTIONS HCWs donned PPE according to standard protocols. Fluorescent liquid and MS2 bacteriophage were applied to HCWs. HCWs then doffed their PPE. After doffing, HCWs were scanned for fluorescence and swabbed for MS2. MS2 detection was performed using reverse transcriptase PCR. The donning and doffing processes were videotaped, and protocol deviations were recorded. RESULTS Overall, 27% of EVD PPE HCWs and 50% of CP PPE HCWs made ≥1 protocol deviation while donning, and 100% of EVD PPE HCWs and 67% of CP PPE HCWs made ≥1 protocol deviation while doffing (P=.02). The median number of doffing protocol deviations among EVD PPE HCWs was 4, versus 1 among CP PPE HCWs. Also, 15 EVD PPE protocol deviations were committed by doffing assistants and/or trained observers. Fluorescence was detected on 8 EVD PPE HCWs (44%) and 5 CP PPE HCWs (28%), most commonly on hands. MS2 was recovered from 2 EVD PPE HCWs (11%) and 3 CP PPE HCWs (17%). CONCLUSIONS Protocol deviations were common during both EVD and CP PPE doffing, and some deviations during EVD PPE doffing were committed by the HCW doffing assistant and/or the trained observer. Self-contamination was common. PPE donning/doffing are complex and deserve additional study. Infect Control Hosp Epidemiol 2017;38:1077-1083.

Accurate PCR Detection of Influenza A/B and RSV Using the Cepheid Xpert Flu+RSV Xpress Assay in Point-of-Care Settings: Comparison to Prodesse ProFlu+

Waning immunity and declining anatomic and physiologic defenses render the elder vulnerable to a wide range of infectious diseases. Clinical presentations are often atypical and muted, favoring global changes in mental status and function over febrile responses or localizing symptoms. This review encompasses early recognition, evaluation, and appropriate management of these common infections specifically in the context of elders presenting to the emergency department. With enhanced understanding and appreciation of the unique aspects of infections in the elderly, emergency physicians can play an integral part in reducing the morbidity and mortality associated with these often debilitating and life-threatening diseases.