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Angiotensin-converting enzyme inhibitor (ACEI) and angiotensin receptor blocker (ARB) drugs may modify risk associated with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Therefore, we assessed whether baseline therapy with ACEIs or ARBs was associated with lower mortality, respiratory failure (noninvasive ventilation or intubation), and renal failure (new renal replacement therapy) in SARS-CoV-2-positive patients. This retrospective registry-based observational cohort study used data from a national database of emergency department patients tested for SARS-CoV-2. Symptomatic emergency department patients were accrued from January to October 2020, across 197 hospitals in the United States. Multivariable analysis using logistic regression evaluated end points among SARS-CoV-2-positive cases, focusing on ACEIs/ARBs and adjusting for covariates. Model performance was evaluated using the c statistic for discrimination and Cox plotting for calibration. A total of 13 859 (99.9%) patients had known mortality status, of whom 2045 (14.8%) died. Respiratory failure occurred in 2485/13 880 (17.9%) and renal failure in 548/13 813 (4.0%) patients with available data. ACEI/ARB status was associated with a 25% decrease in mortality odds (odds ratio [OR], 0.75; 95%CI, 0.59-0.94; P = .011; c = .82). ACEIs/ARBs were not significantly associated with respiratory failure (OR, 0.89; 95%CI, 0.78-1.06; P = .206) or renal failure (OR, 0.75; 95%CI, 0.55-1.04; P = .083). Adjusting for covariates, baseline ACEI/ARB was associated with 25% lower mortality in SARS-CoV-2-positive patients. The potential mechanism for ACEI/ARB mortality modification requires further exploration.

Objectives Patient knowledge deficits related to opioid risks, including lack of knowledge regarding addiction, are well documented. Our objective was to characterize patients' perceptions of signs of addiction. Methods This study utilized data obtained as part of a larger interventional trial. Consecutively discharged English-speaking patients, age >17 years, at an urban academic emergency department, with a new opioid prescription were enrolled from July 2015 to August 2017. During a follow-up phone interview 7 to 14 days after discharge, participants were asked a single question, "What are the signs of addiction to pain medicine?" Verbatim transcribed answers were analyzed using a directed content analysis approach and double coding. These codes were then grouped into themes. Results There were 325 respondents, 57% female, mean age 43.8 years, 70.1% privately insured. Ten de novo codes were added to the 11 DSM-V criteria codes. Six themes were identified: (1) effort spent acquiring opioids, (2) emotional and physical changes related to opioid use, (3) opioid use that is "not needed, (4) increasing opioid use, (5) an emotional relationship with opioids, and (6) the inability to stop opioid use. Conclusions Signs of addiction identified by opioid naive patients were similar to concepts identified in medical definitions. However, participants' understanding also included misconceptions, omissions, and conflated misuse behaviors with signs of addiction. Identifying these differences will help inform patient-provider risk communication, providing an opportunity for counseling and prevention.

Background and purpose There remains limited evidence for the clinical importance of most imaging findings in whiplash. However, it is possible the type and number of findings on Computed Tomography (CT) may contribute to prognostic recovery models. The purpose is to interpret cervical spine pathologies in the context of known factors influencing recovery. Materials and methods This is a secondary analysis from a database of 97 acutely injured participants enrolled in a prospective inception cohort study. Thirty-eight participants underwent standard of care cervical spine CT in the emergency medicine department. All 38 participants were assessed at Results Participants from both groups demonstrated at least one observable pathology. The group with persistent moderate/severe symptoms presented with significantly more pathology at baseline than those who later reported recovery or milder symptoms at 3-months post injury (p = 0.02). Conclusions This preliminary study, which needs replication in a larger cohort, provides foundation that the number of degenerative pathologies seen on initial post MVC CT may be associated with the subsequent clinical course of whiplash.

Objectives Recent guidelines advise limiting opioid prescriptions for acute pain to a three-day supply; however, scant literature quantifies opioid use patterns after an emergency department (ED) visit. We sought to describe opioid consumption patterns after an ED visit for acute pain. Design Descriptive study with data derived from a larger interventional study promoting safe opioid use after ED discharge. Setting Urban academic emergency department (>88,000 annual visits). Subjects Patients were eligible if age >17 years, not chronically using opioids, and newly prescribed hydrocodone-acetaminophen and were included in the analysis if they returned the completed 10-day medication diary. Methods Patient demographics and opioid consumption are reported. Opioid use is described in daily number of pills and daily morphine milligram equivalents (MME) both for the sample overall and by diagnosis. Results Two hundred sixty patients returned completed medication diaries (45 [17%] back pain, 52 [20%] renal colic, 54 [21%] fracture/dislocation, 40 [15%] musculoskeletal injury [nonfracture], and 69 [27%] “other”). The mean age (SD) was 45 (15) years, and 59% of the sample was female. A median of 12 pills were prescribed. Patients with renal colic used the least opioids (total pills: median [interquartile range {IQR}] = 3 [1–7]; total MME: median [IQR] = 20 [10–50]); patients with back pain used the most (total pills: median [IQR] = 12 [7–16]; total MME: median [IQR] = 65 [47.5–100]); 92.5% of patients had leftover pills. Conclusions In this sample, pill consumption varied by illness category; however, overall, patients were consuming low quantities of pills, and the majority had unused pills 10 days after their ED visit.

Background COVID-19 has been associated with increased risk of thromboembolism in critically ill patients. Objectives We sought to examine the association of SARS-CoV-2 test positivity and subsequent acute vascular thrombosis, including venous thromboembolism (VTE) or arterial thrombosis (AT) in, a large nationwide registry of emergency department patients tested with a nucleic acid test for suspected SARS-CoV-2. Methods The RECOVER registry includes 155 emergency departments across the US. We performed a retrospective cohort study to produce odds ratios for COVID+ versus COVID- status as a predictor of 30 day VTE or AT, adjusting for age, biological sex, active cancer, intubation, hospital length of stay (LOS), and ICU care. Results Comparing 14,056 COVID+ patients with 12,995 COVID- patients, the overall 30-day prevalence of VTE events was 1.4% versus 1.3%, respectively (p=0.44, χ2). Multivariable analysis identified that testing positive for SAR-CoV-2 status was negatively associated with both VTE (OR 0.76, 95% CI: 0.61-0.94) and AT (0.51, 0.32-0.80), whereas intubation, ICU care, and age>=50 were positively associated with both VTE and AT. Conclusions In contrast to other reports, results from this large, heterogenous national sample of ED patients tested for SARS-CoV-2, showed no association between vascular thrombosis and COVID-19 test positivity.

PURPOSE: To determine whether emergency department (ED) visit history prior to cancer diagnosis is associated with ED visit volume after cancer diagnosis. METHODS: This was a retrospective cohort study of adults (≥ 18 years) with an incident cancer diagnosis (excluding nonmelanoma skin cancers or leukemia) at an academic medical center between 2008 and 2018 and a safety-net hospital between 2012 and 2016. Our primary outcome was the number of ED visits in the first 6 months after cancer diagnosis, modeled using a multivariable negative binomial regression accounting for ED visit history in the 6-12 months preceding cancer diagnosis, electronic health record proxy social determinants of health, and clinical cancer-related characteristics. RESULTS: Among 35,090 patients with cancer (49% female and 50% non-White), 57% had ≥ 1 ED visit in the 6 months immediately following cancer diagnosis and 20% had ≥ 1 ED visit in the 6-12 months prior to cancer diagnosis. The strongest predictor of postdiagnosis ED visits was frequent (≥ 4) prediagnosis ED visits (adjusted incidence rate ratio [aIRR]: 3.68; 95% CI, 3.36 to 4.02). Other covariates associated with greater postdiagnosis ED use included having 1-3 prediagnosis ED visits (aIRR: 1.32; 95% CI, 1.28 to 1.36), Hispanic (aIRR: 1.12; 95% CI, 1.07 to 1.17) and Black (aIRR: 1.21; 95% CI, 1.17 to 1.25) race, homelessness (aIRR: 1.95; 95% CI, 1.73 to 2.20), advanced-stage cancer (aIRR: 1.30; 95% CI, 1.26 to 1.35), and treatment regimens including chemotherapy (aIRR: 1.44; 95% CI, 1.40 to 1.48). CONCLUSION: The strongest independent predictor for ED use after a new cancer diagnosis was frequent ED visits before cancer diagnosis. Efforts to reduce potentially avoidable ED visits among patients with cancer should consider educational initiatives that target heavy prior ED users and offer them alternative ways to seek urgent medical care.

Objectives Accurate and reliable criteria to rapidly estimate the probability of infection with the novel coronavirus-2 that causes the severe acute respiratory syndrome (SARS-CoV-2) and associated disease (COVID-19) remain an urgent unmet need, especially in emergency care. The objective was to derive and validate a clinical prediction score for SARS-CoV-2 infection that uses simple criteria widely available at the point of care. Methods Data came from the registry data from the national REgistry of suspected COVID-19 in EmeRgency care (RECOVER network) comprising 116 hospitals from 25 states in the US. Clinical variables and 30-day outcomes were abstracted from medical records of 19,850 emergency department (ED) patients tested for SARS-CoV-2. The criterion standard for diagnosis of SARS-CoV-2 required a positive molecular test from a swabbed sample or positive antibody testing within 30 days. The prediction score was derived from a 50% random sample (n = 9,925) using unadjusted analysis of 107 candidate variables as a screening step, followed by stepwise forward logistic regression on 72 variables. Results Multivariable regression yielded a 13-variable score, which was simplified to a 13-point score: +1 point each for age>50 years, measured temperature>37.5°C, oxygen saturation75% probability with +5 or more points). Conclusion Criteria that are available at the point of care can accurately predict the probability of SARS-CoV-2 infection. These criteria could assist with decisions about isolation and testing at high throughput checkpoints.

IntroductionChronic kidney disease (CKD) is a global-health problem. A significant proportion of referrals to nephrologists for CKD management are early and guideline-discordant, which may lead to an excess number of referrals and increased wait-times. Various initiatives have been tested to increase the proportion of guideline-concordant referrals and decrease wait times. This paper describes the protocol for a systematic review to study the impacts of quality improvement initiatives aimed at decreasing the number of non-guideline concordant referrals, increasing the number of guideline-concordant referrals and decreasing wait times for patients to access a nephrologist.Methods and analysisWe developed this protocol by using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses for Protocols (2015). We will search the following empirical electronic databases: MEDLINE, Embase, Cochrane Library, CINAHL, Web of Science, PsycINFO and grey literature for studies designed to improve guideline-concordant referrals or to reduce unnecessary referrals of patients with CKD from primary care to nephrology. Our search will include all studies published from database inception to April 2021 with no language restrictions. The studies will be limited to referrals for adult patients to nephrologists. Referrals of patients with CKD from non-nephrology specialists (eg, general internal medicine) will be excluded.Ethics and disseminationEthics approval will not be required, as we will analyse data from studies that have already been published and are publicly accessible. We will share our findings using traditional approaches, including scientific presentations, open access peer-reviewed platforms, and appropriate government and public health agencies.PROSPERO registration numberCRD42021247756.

Background Subdural hematoma (SDH) is the most common form of traumatic intracranial hemorrhage. Orlando and colleagues derived a prediction tool for neurosurgical intervention, the “Orlando Tool,” consisting of (a) maximum thickness of hematoma, and (b) presence of acute-on-chronic (AOC) hematoma. This study externally validated the Orlando Tool. Methods We performed a retrospective chart review of consecutive patients aged ≥16 years with a Glasgow Coma Scale score ≥13, and a computed tomography–documented isolated, traumatic SDH, who presented to a university-affiliated, urban, 100,000-annual-visit emergency department from 2009–2015. The primary outcome was neurosurgical intervention. Thickness of hematoma and presence of AOC hematoma were abstracted from cranial computed tomography scan reports by 2 trained physician abstractors. Results A total of 607 patients with isolated SDH were included in the validation dataset. Median hematoma thickness was 6 mm. AOC hematoma was noted in 13% of patients. Mortality was 2.5%, and 15.7% of patients underwent neurosurgery. The Orlando Tool had an area under the curve of 0.93 in the validation, comparable to 0.94 reported in their derivation set. At the prespecified cutoff of 9.96% risk, the tool had a 88% (95% CI, 80–94) sensitivity in the validation cohort compared with 94% in the derivation cohort. The specificity of 82% (95% CI, 78–85) was comparable with 84% in the derivation group. Negative likelihood ratio was 0.14 (95% CI, 0.08–0.25), compared with 0.09 in derivation. Conclusions The Orlando Tool accurately predicts neurosurgical intervention in patients with isolated, traumatic SDH and preserved consciousness.

Key Points Question How well do different risk assessment tools estimate 7- and 30-day mortality in patients with acute pulmonary embolism? Findings This cohort study of 416 patients with acute pulmonary embolism found that commonly used risk assessment tools have only moderate discriminative ability for 7- and 30-day mortality in patients with acute pulmonary embolism. Meaning These findings suggest that clinicians may need to integrate broad clinical information rather than relying on a single risk assessment tool to estimate mortality risk and determine management for patients with acute pulmonary embolism., This cohort study examines the performance of risk assessment scores among US patients with acute pulmonary embolism., Importance The risk of death from acute pulmonary embolism can range as high as 15%, depending on patient factors at initial presentation. Acute treatment decisions are largely based on an estimate of this mortality risk. Objective To assess the performance of risk assessment scores in a modern, US cohort of patients with acute pulmonary embolism. Design, Setting, and Participants This multicenter cohort study was conducted between October 2016 and October 2017 at 8 hospitals participating in the Pulmonary Embolism Response Team (PERT) Consortium registry. Included patients were adults who presented with acute pulmonary embolism and had sufficient information in the medical record to calculate risk scores. Data analysis was performed from March to May 2020. Main Outcomes and Measures All-cause mortality (7- and 30-day) and associated discrimination were assessed by the area under the receiver operator curve (AUC). Results Among 416 patients with acute pulmonary embolism (mean [SD] age, 61.3 [17.6] years; 207 men [49.8%]), 7-day mortality in the low-risk groups ranged from 1.3% (1 patient) to 3.1% (4 patients), whereas 30-day mortality ranged from 2.6% (1 patient) to 10.2% (13 patients). Among patients in the highest-risk groups, the 7-day mortality ranged from 7.0% (18 patients) to 16.3% (7 patients), whereas 30-day mortality ranged from 14.4% (37 patients) to 26.3% (26 patients). Each of the risk stratification tools had modest discrimination for 7-day mortality (AUC range, 0.616-0.666) with slightly lower discrimination for 30-day mortality (AUC range, 0.550-0.694). Conclusions and Relevance These findings suggest that commonly used risk tools for acute pulmonary embolism have modest estimating ability. Future studies to develop and validate better risk assessment tools are needed.

Objective Low back pain accounts for nearly 4 million emergency department (ED) visits annually and is a significant source of disability. Physical therapy has been suggested as a potentially effective nonopioid treatment for low back pain; however, no studies to our knowledge have yet evaluated the emerging resource of ED-initiated physical therapy. The study objective was to compare patient-reported outcomes in patients receiving ED-initiated physical therapy and patients receiving usual care for acute low back pain. Methods This was a prospective observational study of ED patients receiving either physical therapy or usual care for acute low back pain from May 1, 2018, to May 24, 2019, at a single academic ED (>91,000 annual visits). The primary outcome was pain-related functioning, assessed with Oswestry Disability Index (ODI) and Patient-Reported Outcomes Measurement Information System pain interference (PROMIS-PI) scores. The secondary outcome was use of high-risk medications (opioids, benzodiazepines, and skeletal muscle relaxants). Outcomes were compared over 3 months using adjusted linear mixed and generalized estimating equation models. Results For 101 participants (43 receiving ED-initiated physical therapy and 58 receiving usual care), the median age was 40.5 years and 59% were women. Baseline outcome scores in the ED-initiated physical therapy group were higher than those in the usual care group (ODI = 51.1 vs 36.0; PROMIS-PI = 67.6 vs 62.7). Patients receiving ED-initiated physical therapy had greater improvements in both ODI and PROMIS-PI scores at the 3-month follow-up (ODI = −14.4 [95% CI = −23.0 to −5.7]; PROMIS-PI = −5.1 [95% CI = −9.9 to −0.4]) and lower use of high-risk medications (odds ratio = 0.05 [95% CI = 0.01 to 0.58]). Conclusion In this single-center observational study, ED-initiated physical therapy for acute low back pain was associated with improvements in functioning and lower use of high-risk medications compared with usual care; the causality of these relationships remains to be explored. Impact ED-initiated physical therapy is a promising therapy for acute low back pain that may reduce reliance on high-risk medications while improving patient-reported outcomes. Lay Summary Emergency department–initiated physical therapy for low back pain was associated with greater improvement in functioning and lower use of high-risk medications over 3 months.

Ninety‐five adults enrolled in the Etiology of Pneumonia in the Community study with negative admission influenza polymerase chain reaction (PCR) tests received influenza vaccination during hospitalization. Acute and convalescent influenza serology was performed. After vaccination, seropositive (≥1:40) hemagglutination antibody titers (HAI) were achieved in 55% to influenza A(H1N1)pdm09, 58% to influenza A(H3N2), 77% to influenza B (Victoria), and 74% to influenza B (Yamagata) viruses. Sixty‐six (69%) patients seroconverted (≥4‐fold HAI rise) to ≥1 strain. Failure to seroconvert was associated with diabetes, bacterial detection, baseline seropositive titers for influenza B (Yamagata), and influenza vaccination in the previous season.

Recommended strategy for venous thromboembolism (VTE) diagnosis includes the use of sensitive D-dimer (DDi) assays along with pretest probability (PTP) assessment. The Clinical and Laboratory Standards Institute (CLSI) recently issued a guideline (US FDA endorsed) on DDi in VTE exclusion. Such guideline specifies the ideal D-dimer assay characteristics and target population. Demonstrate STA-LiatestD-Di performance combined with a PTP score for proximal deep vein thrombosis (pDVT) exclusion in a CLSI compliant study. International, multicenter, prospective nonrandomized, noninterventional clinical outcome management study conducted in a standard-of-care setting. DDi was measured in DVT-suspected consecutive low/moderate PTP outpatients, without conditions possibly impacting DDi values independently of thrombosis presence (age >80, pregnancy, postoperative, cancer) using a 0.5 μg/ml (FEU) threshold for DVT exclusion. Results were used to determine test performance. One thousand two hundred and thirty-four patients (17 centers) signed informed consent. Nine hundred and eighty (mean age: 55) with valid results (494 negative DDi) completed the study (DVT prevalence: 8.7%). STA-LiatestD-Di performance exceeded CLSI/FDA requirements: sensitivity: 100% (95% CI 95.8-100%), NPV: 100% (95% CI 99.3-100%). STA-LiatestD-Di associated with PTP score showed excellent performance for pDVT exclusion, as recently demonstrated for pulmonary embolism. The assay allows safe VTE exclusion, avoiding unnecessary imaging tests.

Objective We assessed emergency department (ED) patient perceptions of how physicians can improve their language to determine patient preferences for 11 phrases to enhance physician empathy toward the goal of reducing low-value advanced imaging. Methods Multi-center survey study of low-risk ED patients undergoing computerized tomography (CT) scanning. Results We enroled 305 participants across nine sites. The statement “I have carefully considered what you told me about what brought you here today” was most frequently rated as important (88%). The statement “I have thought about the cost of your medical care to you today” was least frequently rated as important (59%). Participants preferred statements indicating physicians had considered their “vital signs and physical examination” (86%), “past medical history” (84%), and “what prior research tells me about your condition” (79%). Participants also valued statements conveying risks of testing, including potential kidney injury (78%) and radiation (77%). Conclusion The majority of phrases were identified as important. Participants preferred statements conveying cognitive reassurance, medical knowledge and risks of testing. Practice implications Our findings suggest specific phrases have the potential to enhance ED patient perceptions of physician empathy. Further research is needed to determine whether statements to convey empathy affect diagnostic testing rates.

Author(s): Akhter, Murtaza; Kline, Jeffrey; Bhattarai, Bikash; Courtney, Mark; Kabrhel, Christopher | Abstract: Introduction: The American College of Emergency Physicians guidelines recommend more aggressive workup beyond imaging alone in patients with a high pretest probability (PTP) of pulmonary embolism (PE). However, the ability of multiple tests to safely rule out PE in high PTP patients is not known. We sought to measure the ability of negative computed tomography pulmonary angiography (CTPA) along with negative D-dimer to rule out PE in these high-risk patients.Methods: We analyzed data from a previous prospective observational study conducted in 12 emergency departments (ED). Wells score criteria were entered by providers before final PE testing. PE was diagnosed by imaging on the index ED visit, or within 45 days, demonstrating either PE ordeep vein thrombosis (DVT), or if the patient died of PE during the 45-day, follow-up period. Testing threshold was set at 1.8%.Results: A total of 7,940 patients were enrolled and tested for PE, and 257 had high PTP (Wells g6). Sixteen of these high-risk patients had negative CTPA and negative D-dimer, of whom two were positive for PE (12.5% [95% confidence interval 2.2%-40.0%]). One of these patients had a DVT on CT venogram and the other was diagnosed at follow-up.Conclusion: Our analysis suggests that in patients with high PTP of PE, neither negative CTPA by itself nor a negative CTPA plus a negative D-dimer are sufficient to rule out PE. More aggressive workup strategies may be required for these patients.

Objectives To examine the effect of an emergency department (ED)‐based transitional care nurse (TCN) on hospital use. Design Prospective observational cohort. Setting Three U.S. (NY, IL, NJ) EDs from January 1, 2013, to June 30, 2015. Participants Individuals aged 65 and older in the ED (N = 57,287). Intervention The intervention was first TCN contact. Controls never saw a TCN during the study period. Measurements We examined sociodemographic and clinical characteristics associated with TCN use and outcomes. The primary outcome was inpatient admission during the index ED visit (admission on Day 0). Secondary outcomes included cumulative 30‐day admission (any admission on Days 0–30) and 72‐hour ED revisits. Results A TCN saw 5,930 (10%) individuals, 42% of whom were admitted. After accounting for observed selection bias using entropy balance, results showed that when compared to controls, TCN contact was associated with lower risk of admission (site 1: −9.9% risk of inpatient admission, 95% confidence interval (CI) = −12.3% to −7.5%; site 2: −16.5%, 95% CI = −18.7% to −14.2%; site 3: −4.7%, 95% CI = −7.5% to −2.0%). Participants with TCN contact had greater risk of a 72‐hour ED revisit at two sites (site 1: 1.5%, 95% CI = 0.7–2.3%; site 2: 1.4%, 95% CI = 0.7–2.1%). Risk of any admission within 30 days of the index ED visit also remained lower for TCN patients at both these sites (site 1: −7.8%, 95% CI = −10.3% to −5.3%; site 2: −13.8%, 95% CI = −16.1% to −11.6%). Conclusion Targeted evaluation by geriatric ED transitions of care staff may be an effective delivery innovation to reduce risk of inpatient admission.

Background Although pharmacists commonly provide patient education and help manage high-risk anticoagulant medications in inpatient and outpatient settings, the evidence for these interventions in the emergency department (ED) is less established, especially in the era of direct-acting oral anticoagulants. In 2013, a formal program was initiated whereby patients discharged with a new prescription for any anticoagulant receive education from an ED pharmacist when on-site. In addition, they received follow-up phone calls from an ED pharmacist within 72 hours of discharge. Objective We sought to identify the impact of pharmacist education, defined as the need for intervention on callback, versus physician and nursing-driven discharge measures on patient understanding and appropriate use of anticoagulant medications. Methods A single-center retrospective analysis included patients discharged from the ED between May 2013 and May 2016 with a new anticoagulant prescription. Electronic callback records were reviewed to assess patients' adherence and understanding of discharge instructions as well as for an anticoagulant-related hospital readmission within 90 days. Results One hundred seventy-four patients were evaluated in a per protocol analysis. Patients who did not receive pharmacist education prior to discharge required an increased need for intervention during callback versus those who did (36.4% vs. 12.9%, p = 0.0005) related to adherence, inappropriate administration, and continued use of interacting medications or supplements, among other concerns. In addition, patients who had not received pharmacist counseling were more likely to be readmitted to a hospital or return to the ED within 90 days after their initial visit for an anticoagulation-related problem versus patients who had (12.12% vs. 1.85%, p = 0.0069). Conclusion Discharge education by ED pharmacists leads to improved patient understanding and appropriate use of anticoagulants.

Background Thousands of people die annually from prescription opioid overdoses; however there are few strategies to ensure patients receive medication risk information at the time of prescribing. Objectives To compare the effectiveness of the Emergency Department (ED) Electronic Medication Complete Communication (EMC2) Opioid Strategy (with and without text messaging) to promote safe medication use and improved patient knowledge as compared to usual care. Methods The ED EMC2 Opioid Strategy consists of 5 automated components to promote safe medication use: 1) physician reminder to counsel, 2) inbox message sent on to the patient's primary care physician, 3) pharmacist message on the prescription to counsel, 4) MedSheet supporting prescription information, and 5) patient-centered Take-Wait-Stop wording of prescription instructions. This strategy will be assessed both with and without the addition of text messages via a three-arm randomized trial. The study will take place at an urban academic ED (annual volume > 85,000) in Chicago, IL. Patients being discharged with a new prescription for hydrocodone-acetaminophen will be enrolled and randomized (based on their prescribing physician). The primary outcome of the study is medication safe use as measured by a demonstrated dosing task. Additionally actual safe use, patient knowledge and provider counseling will be measured. Implementation fidelity as well as costs will be reported. Conclusions The ED EMC2 Opioid Strategy embeds a risk communication strategy into the electronic health record and promotes medication counseling with minimal workflow disruption. This trial will evaluate the strategy's effectiveness and implementation fidelity as compared to usual care. Trial registration This trial is registered on clinicaltrials.gov with identifier NCT02431793 .

Background Recent trials suggest procalcitonin-based guidelines can reduce antibiotic use for respiratory infections. However, the accuracy of procalcitonin to discriminate between viral and bacterial pneumonia requires further dissection. Methods We evaluated the association between serum procalcitonin concentration at hospital admission with pathogens detected in a multicenter prospective surveillance study of adults hospitalized with community-acquired pneumonia. Systematic pathogen testing included cultures, serology, urine antigen tests, and molecular detection. Accuracy of procalcitonin to discriminate between viral and bacterial pathogens was calculated. Results Among 1735 patients, pathogens were identified in 645 (37%), including 169 (10%) with typical bacteria, 67 (4%) with atypical bacteria, and 409 (24%) with viruses only. Median procalcitonin concentration was lower with viral pathogens (0.09 ng/mL; interquartile range [IQR]

Background Benzodiazepine-opioid combination therapy is potentially harmful due to the risk of synergistic respiratory depression, and the rate of death due to benzodiazepine-opioid overdose is increasing. Little is known about the prevalence and characteristics of benzodiazepine-opioid co-prescribing from the ED setting. Methods Secondary analysis of data from the National Hospital Ambulatory Medical Care Survey, using sample weights to generate population estimates. The primary objective was to describe the annual prevalence of benzodiazepine-opioid co-prescribing from 2006 to 2012, using 95% confidence intervals (95% CI) to compare adjacent years. The secondary objective was to compare characteristics of ED encounters receiving a benzodiazepine-opioid co-prescription versus those receiving an opioid prescription alone, using a multivariable logistic regression. Results The prevalence of benzodiazepine-opioid co-prescribing did not significantly change from 2006 to 2012. During this period, 2.7% (95% CI: 2.5–2.8%) of ED encounters prescribed an opioid were also prescribed a benzodiazepine. Relative to encounters receiving an opioid prescription alone, encounters receiving a co-prescription were more likely to represent a follow-up rather than initial visit (Odds Ratio [OR] 1.52), receive more medications (OR 1.41) and fewer procedures (OR 0.48) while in the ED, and more likely to have a diagnosis related to mental disorder (OR 20.60) or musculoskeletal problem (OR 3.71). Conclusions From 2006 to 2012, almost 3% of all ED encounters receiving an opioid prescription also received a benzodiazepine co-prescription. The odds of benzodiazepine-opioid co-prescribing were significantly higher in ED encounters representing a follow-up visit and in diagnoses relating to a mental disorder or musculoskeletal problem.

Background and Purpose— No standard approach to obtaining informed consent for stroke thrombolysis with tPA (tissue-type plasminogen activator) currently exists. We aimed to assess current nationwide practice patterns of obtaining informed consent for tPA. Methods— An online survey was developed and distributed by e-mail to clinicians involved in acute stroke care. Multivariable logistic regression analyses were performed to determine independent factors contributing to always obtaining informed consent for tPA. Results— Among 268 respondents, 36.7% reported always obtaining informed consent and 51.8% reported the informed consent process caused treatment delays. Being an emergency medicine physician (odds ratio, 5.8; 95% confidence interval, 2.9–11.5) and practicing at a nonacademic medical center (odds ratio, 2.1; 95% confidence interval, 1.0–4.3) were independently associated with always requiring informed consent. The most commonly cited cause of delay was waiting for a patient’s family to reach consensus about treatment. Conclusions— Most clinicians always or often require informed consent for stroke thrombolysis. Future research should focus on standardizing content and delivery of tPA information to reduce delays.

Despite increased focus on opioid prescribing, little is known about the influence of prescription opioid medication information given to patients in the emergency department (ED). The study objective was to evaluate the effect of an Electronic Medication Complete Communication (EMCThis was a three-arm prospective, randomized controlled pragmatic trial with randomization occurring at the physician level. Consecutive discharged patients at an urban academic ED (88,000 visits) with new hydrocodone-acetaminophen prescriptions received one of three care pathways: 1) usual care, 2) EMCAmong the 652 enrolled, 343 completed follow-up (57% women; mean ± SD age = 42 ± 14.0 years). Demonstrated safe opioid use occurred more often in the EMCThe study found that the EMC

Objectives Transitional care nurse (TCN) care has been associated with decreased hospitalizations for older adults in the emergency department (ED). The objective of this study was to evaluate the association between TCN care and readmission for geriatric patients who visit the ED within 30 days of a prior hospital discharge. Methods We studied a prospective cohort of ED patients aged 65 and older with an ED visit within 30 days of inpatient discharge. Patients with an Emergency Severity Index of 1 or prior TCN contact were excluded. Entropy balancing and logistic regression were used to estimate the average incremental effect of the TCN intervention on risk of admission during the index ED visit and within 30 days of prior discharge. Results Of 6,838 visits, 608 included TCN care. TCN patients had lower risk of readmission during the index ED visit at Mount Sinai Medical Center (MSMC), -10.1 percentage points (95% confidence interval [CI] = -18.5 to -2.7), and Northwestern Memorial Hospital (NMH), -17.3 percentage points (95% CI = -23.1 to -11.5), but not St. Joseph's Regional Medical Center (SJRMC), -2.5 percentage points (95% CI = -10.5 to 5.5). TCN patients had fewer readmissions within 30 days of prior hospital discharge at NMH, -16.2 percentage points (95% CI = -22.0 to -10.3), but not at MSMC, -5.6 percentage points (95% CI = -13.1 to 1.8), or at SJRMC, 0.5 percentage points (95% CI = -7.2 to 8.2). Conclusions Transitional care nurse care in the ED after a prior hospitalization was associated with decreased readmission of older adults during the index ED visit at two of three hospitals, with sustained reduction for the entire 30-day readmission window at one hospital. TCN interventions in the ED may decrease readmissions for geriatric patients in the ED; however, these results may be dependent on implementation of the program and availability of ED, hospital, and local resources for older adults.

Background Health-related quality of life (HRQoL), encompassing social, emotional, and physical wellbeing is an important clinical outcome of medical care, especially among geriatric patients. It is unclear which domains of HRQoL are most important to geriatric patients and which domains they hope to address when using the Emergency Department (ED). The objective of this study was to understand which aspects of HRQoL are most valued by geriatric patients in the ED and what expectations patients have for addressing or improving HRQoL during an ED visit. Methods This was a qualitative focus group study of geriatric ED patients from an urban, academic ED in the United States with > 16,500 annual geriatric visits. Patients were eligible if they were age > =65 years and discharged from the ED within 45 days of recruitment. Semi-structured pilot interviews and focus groups were conducted several weeks after the ED visit. Participants shared their ED experiences and to discuss their perceptions of the subsequent impact on their quality of life, focusing on the domains of physical, mental, and social health. Latent content and constant comparative methods were used to code focus group transcripts and analyze for emergent themes. Results Three individuals participated in pilot interviews and 31 participated in six focus groups. Twelve codes across five main themes relating to HRQoL were identified. Patients recalled: (1) A strong desire to regain physical function, and (2) anxiety elicited by the emotional experience of seeking care in the emergency department, due to uncertainty in diagnosis, treatment, and prognosis. In addition, patients noted both (3) interpersonal impacts of health on quality of life, primarily mediated primarily by social interaction, and (4) an individual experience of health and quality of life mediated primarily by mental health. Finally, (5) patients questioned if the ED was the right place to attempt to address HRQoL. Conclusions Patients expressed anxiety around the time of their ED visit related to uncertainty, they desired functional recovery, and identified both interpersonal effects of health on quality of life mediated by social health, and an individual experience of health and quality of life mediated by mental health.

Objective To better understand patients’ reasoning for keeping unused opioid pills. Methods As part of a larger study, patients were asked their plans for their unused opioids. Responses were categorized as “dispose,” “keep,” and “don’t know.” Baseline characteristics were compared between the “keep” and “dispose” groups. Verbatim responses categorized as “keep” were analyzed qualitatively using a team-based inductive approach with constant comparison across cases. Results One hundred patients planned to dispose of their pills; 117 planned to keep them. There were no differences in demographics between the groups. Among patients who planned to keep their pills, the mean age was 43 years and 47% were male. Analysis revealed four categories of patient responses: 1) plans to keep their pills “just in case,” with reference to a medical condition (e.g., kidney stone); 2) plans to keep pills “just in case” without reference to any medical condition; 3) plans to dispose in delayed fashion (e.g., after pill expiration) or unsure of how to dispose; and 4) no identified plans, yet intended to keep pills. In this sample, there were no differences in characteristics of those reporting planning to keep vs dispose of pills; however, there were diverse reasons for keeping opioids. Conclusions This manuscript describes a sample of patients who kept their unused opioids and presents qualitative data detailing their personal reasoning for keeping the unused pills. Awareness of the range of motivations underpinning this behavior may inform the development of tailored education and risk communication messages to improve opioid disposal.

Key Points Question Do 1 or more doses of levocarnitine reduce organ failure in septic shock at 48 hours, and, if so, what is the likelihood of success in a phase 3 trial? Findings In an adaptive randomized, blinded clinical trial of 250 adults, the most efficacious dose of levocarnitine (18 g) demonstrated a posterior probability of efficacy of 0.78, which did not reach the a priori threshold of 0.90. Meaning Levocarnitine did not meaningfully reduce organ failure at 48 hours in patients with septic shock., Importance Sepsis induces profound metabolic derangements, while exogenous levocarnitine mitigates metabolic dysfunction by enhancing glucose and lactate oxidation and increasing fatty acid shuttling. Previous trials in sepsis suggest beneficial effects of levocarnitine on patient-centered outcomes. Objectives To test the hypothesis that levocarnitine reduces cumulative organ failure in patients with septic shock at 48 hours and, if present, to estimate the probability that the most efficacious dose will decrease 28-day mortality in a pivotal phase 3 clinical trial. Design, Setting, and Participants Multicenter adaptive, randomized, blinded, dose-finding, phase 2 clinical trial (Rapid Administration of Carnitine in Sepsis [RACE]). The setting was 16 urban US medical centers. Participants were patients aged 18 years or older admitted from March 5, 2013, to February 5, 2018, with septic shock and moderate organ dysfunction. Interventions Within 24 hours of identification, patients were assigned to 1 of the following 4 treatments: low (6 g), medium (12 g), or high (18 g) doses of levocarnitine or an equivalent volume of saline placebo administered as a 12-hour infusion. Main Outcomes and Measures The primary outcome required, first, a greater than 90% posterior probability that the most promising levocarnitine dose decreases the Sequential Organ Failure Assessment (SOFA) score at 48 hours and, second (given having met the first condition), at least a 30% predictive probability of success in reducing 28-day mortality in a subsequent traditional superiority trial to test efficacy. Results Of the 250 enrolled participants (mean [SD] age, 61.7 [14.8] years; 56.8% male), 35, 34, and 106 patients were adaptively randomized to the low, medium, and high levocarnitine doses, respectively, while 75 patients were randomized to placebo. In the intent-to-treat analysis, the fitted mean (SD) changes in the SOFA score for the low, medium, and high levocarnitine groups were −1.27 (0.49), −1.66 (0.38), and −1.97 (0.32), respectively, vs −1.63 (0.35) in the placebo group. The posterior probability that the 18-g dose is superior to placebo was 0.78, which did not meet the a priori threshold of 0.90. Mortality at 28 days was 45.9% (34 of 74) in the placebo group compared with 43.3% (45 of 104) for the most promising levocarnitine dose (18 g). Similar findings were noted in the per-protocol analysis. Conclusions and Relevance In this dose-finding, phase 2 adaptive randomized trial, the most efficacious dose of levocarnitine (18 g) did not meaningfully reduce cumulative organ failure at 48 hours. Trial Registration ClinicalTrials.gov Identifier: NCT01665092, This randomized clinical trial tests the hypothesis that levocarnitine reduces cumulative organ failure in patients with septic shock at 48 hours and estimates the probability that the most efficacious dose will decrease 28-day mortality.

Pulmonary embolism (PE) remains a significant cause of hospital admission and health-care costs. Estimates of PE incidence came from the 1990s, and data are limited to describe trends in hospital admissions for PE over the past decade.We analyzed Nationwide Inpatient Sample data from 1993 to 2012 to identify patients admitted with PE. We included admissions with International Classification of Diseases, 9th revision, codes listing PE as the principal diagnosis as well as admissions with PE listed secondary to principal diagnoses of respiratory failure or DVT. Massive PE was defined by mechanical ventilation, vasopressors, or nonseptic shock. Outcomes included hospital lengths of stay, adjusted charges, and all-cause hospital mortality. Linear regression was used to analyze changes over time.Admissions for PE increased from 23 per 100,000 in 1993 to 65 per 100,000 in 2012 (P .001). The percent of admissions meeting criteria for massive PE decreased (5.3% to 4.4%, P = .002), but the absolute number of admissions for massive PE increased (from 1.5 to 2.8 per 100,000, P .001). Median length of stay decreased from 8 (interquartile range [IQR], 6-11) to 4 (IQR, 3-6) days (P .001). Adjusted hospital charges increased from $16,475 (IQR, $10,748-$26,211) in 1993 to $25,728 (IQR, $15,505-$44,493) in 2012 (P .001). All-cause hospital mortality decreased from 7.1% to 3.2% (P .001), but population-adjusted deaths during admission for PE increased from 1.6 to 2.1 per 100,000 (P .001).Total admissions and hospital charges for PE have increased over the past two decades. However, the population-adjusted admission rate has increased disproportionately to the incidence of patients with severe PE. We hypothesize that these findings reflect a concerning national movement toward more admissions of less severe PE.

Objectives Outpatient treatment of acute venous thromboembolism (VTE) requires the selection of patients with a low risk of bleeding during the first few weeks of anticoagulation. The accuracy of four systems, originally derived for predicting bleeding in VTE treated with vitamin K antagonists (VKAs), was assessed in VTE patients treated with rivaroxaban. Methods All patients treated with rivaroxaban in the multinational EINSTEIN deep vein thrombosis (DVT) and pulmonary embolism (PE) trials were included. Major bleeding was defined as ≥2 g/dL drop in hemoglobin or ≥2-unit blood transfusion, bleeding in critical area, or bleeding contributing to death. The authors examined the incidence of major bleeding in patients with low-risk assignment by the systems of Ruiz-Gimenez et al. (score = 0 to 1), Beyth et al. (score = 0), Kuijer et al. (score = 0), and Landefeld and Goldman. (score = 0). For clinical relevance, the definition of low risk for all scores except Kuijer includes all patients

Here we present a secondary analysis from a parent database of 97 acutely injured participants enrolled in a prospective inception cohort study of whiplash recovery after motor vehicle collision (MVC). The purpose was to investigate the deep and superficial neck extensor muscles with peri-traumatic computed tomography (CT) and longitudinal measures of magnetic resonance imaging (MRI) in participants with varying levels of whiplash-related disability. Thirty-six underwent standard care imaging of the cervical spine with CT at a level-1 trauma designated emergency department. All 36 participants were assessed with MRI of the cervical spine at

Objective Physical therapy (PT) is commonly cited as a non-opioid pain strategy, and previous studies indicate PT reduces opioid utilization in outpatients with back pain. No study has yet examined whether PT is associated with lower analgesic prescribing in the ED setting. Methods This was a retrospective cohort study of discharged ED visits with a primary ICD-10 diagnosis relating to back or neck pain from 10/1/15 to 2/21/17 at an urban academic ED. Visits receiving a PT evaluation were matched with same-date visits receiving usual care. We compared the primary outcomes of opioid and benzodiazepine prescribing between the two cohorts using chi-squared test and multivariable logistic regression. Results 74 ED visits received PT during the study period; these visits were matched with 390 same-date visits receiving usual care. Opioid prescribing among ED-PT visits was not significantly higher compared to usual care visits on both unadjusted analysis (50% vs 42%, p = 0.19) and adjusted analysis (adjOR 1.05, 95% CI 0.48–2.28). However, benzodiazepine prescribing among ED-PT visits was significantly higher than usual care visits on both unadjusted (45% vs 23%, p Conclusions In this single center study, ED back and neck pain visits receiving PT were no less likely to receive an opioid prescription and were more likely to receive a benzodiazepine than visits receiving usual care. Although prior studies demonstrate that PT may reduce opioid utilization in the subsequent year, these results indicate that analgesic prescribing is not reduced at the initial ED encounter.

To describe the frequency and risk of return visit to the emergency department (ED) by older adults after prescription of any of four potentially inappropriate medication (PIM) classes included in the 2015 Beers Criteria commonly used for the relief of acute pain in the ED.Retrospective cohort study.Large urban academic ED from January 1, 2013, to December 31, 2015.Patients age 65 and older discharged from the ED with an initial pain score of 1 or higher (11 822 visits).Prescriptions for PIM classes were collected from the medical record: nonsteroidal anti-inflammatory drugs (NSAIDs), benzodiazepines, skeletal muscle relaxants, and opioids. The proportion of patients with ED returns within 9 days were compared by medication class and pain severity (mild, moderate, or severe). Multivariable logistic regression was performed for each pain category to determine adjusted odds ratios (aORs) of ED return.Of 11 822 included patients, PIMs were prescribed in 3392 (28.7%): 2550 (21.6%) opioids, 826 (7.0%) NSAIDs, 277 (2.3%) benzodiazepines, and 68 (0.6%) nonbenzodiazepine skeletal muscle relaxants. Total 9-day ED returns were 1125 (9.5%): mild 7.0%, moderate 8.3%, and severe pain 11.7%. Opioids were not associated with more frequent ED returns for mild or moderate pain, and they were associated with less frequent ED returns for severe pain (9.2% vs 12.7%; p.001; aOR 0.69; 95% confidence interval [CI] = 0.54-0.87). Benzodiazepines were associated with more frequent ED returns for patients with moderate pain (15.5% vs 8.2%; p.01; aOR = 2.01; 95%CI = 1.10-3.70).These results are consistent with recommendations to limit benzodiazepine prescriptions for older adults and that among older adults with severe pain, opioid prescribing is associated with less frequent ED visits within 9 days of discharge. However, this study was not designed to evaluate safety, adverse events, or other important patient-centered outcomes. J Am Geriatr Soc 67:719-725, 2019.

Background Adults hospitalized with community-acquired pneumonia (CAP) are at high risk for short-term mortality. However, it is unclear whether improvements in in-hospital pneumonia care could substantially lower this risk. We extensively reviewed all in-hospital deaths in a large prospective CAP study to assess the cause of each death and assess the extent of potentially preventable mortality. Methods We enrolled adults hospitalized with CAP at five tertiary-care hospitals in the United States. Five physician investigators reviewed the medical record and study database for each patient who died to identify the cause of death, the contribution of CAP to death, and any preventable factors potentially contributing to death. Results Among 2,320 enrolled patients, 52 (2.2%) died during initial hospitalization. Among these 52 patients, 33 (63.4%) were ≥ 65 years old, and 32 (61.5%) had ≥ two chronic comorbidities. CAP was judged to be the direct cause of death in 27 patients (51.9%). Ten patients (19.2%) had do-not-resuscitate orders prior to admission. Four patients were identified in whom a lapse in quality of care potentially contributed to death; preexisting end-of-life limitations were present in two of these patients. Two patients seeking full medical care experienced a lapse in in-hospital quality of pneumonia care that potentially contributed to death. Conclusions In this study of adults with CAP at tertiary-care hospitals with a low mortality rate, most in-hospital deaths did not appear to be preventable with improvements in in-hospital pneumonia care. Preexisting end-of-life limitations in care, advanced age, and high comorbidity burden were common among those who died.

To evaluate paediatric post-tonsillectomy pain management using oxycodone when a specific analgesia information sheet is included with standard postoperative information.Oxycodone information sheets were randomly allocated to half the study children's post-tonsillectomy information pack. The trial was double-blinded to the surgeon, anaesthetist, nursing and administrative staff. Parents and children completed the pain assessment on day 3, 5 and 7. On day 10 the parents completed a questionnaire.A postoperative analgesia information sheet provides for higher satisfaction and knowledge for parents using oxycodone (p0.001) and children have improved postoperative pain control, most significantly at day 5 (p0.05). Parent assessment of the child's analgesia was superior with the oxycodone information sheet, most significantly at day 3 and 7 post operatively (p0.05). There is also a positive correlation between the parents' observed pain score and children's self reported pain score, with a low correlation efficient level observed (p0.001).Information sheets are useful in education and use of postoperative analgesia. The primary objective to explore the efficacy of the information sheet has proved to be successful in this setting. Given risks of opioid analgesia, it is recommended that postoperative information sheets be given to all parents, to provide for improved analgesia control and safe management of children in the postoperative period.

Background Many patients have unexplained persistent dyspnea after negative computed tomographic pulmonary angiography (CTPA). We hypothesized that many of these patients have isolated right ventricular (RV) dysfunction from treatable causes. We previously derived a clinical decision rule (CDR) for predicting RV dysfunction consisting of persistent dyspnea and normal CTPA, finding that 53% of CDR-positive patients had isolated RV dysfunction. Our goal is to validate this previously derived CDR by measuring the prevalence of RV dysfunction and outcomes in dyspneic emergency department patients. Methods A secondary analysis of a prospective observational multicenter study that enrolled patients presenting with suspected PE was performed. We included patients with persistent dyspnea, a nonsignificant CTPA, and formal echo performed. Right ventricular dysfunction was defined as RV hypokinesis and/or dilation with or without moderate to severe tricuspid regurgitation. Results A total of 7940 patients were enrolled. Two thousand six hundred sixteen patients were analyzed after excluding patients without persistent dyspnea and those with a significant finding on CTPA. One hundred ninety eight patients had echocardiography performed as standard care. Of those, 19% (95% confidence interval [CI], 14%-25%) and 33% (95% CI, 25%-42%) exhibited RV dysfunction and isolated RV dysfunction, respectively. Patients with isolated RV dysfunction or overload were more likely than those without RV dysfunction to have a return visit to the emergency department within 45 days for the same complaint (39% vs 18%; 95% CI of the difference, 4%-38%). Conclusion This simple clinical prediction rule predicted a 33% prevalence of isolated RV dysfunction or overload. Patients with isolated RV dysfunction had higher recidivism rates and a trend toward worse outcomes.

The use of opioid analgesics in the United States has significantly increased in recent years. However, there is minimal consensus on what discharge counseling should accompany these high-risk prescriptions and large variations in what is done in practice. The objective of this study was to evaluate the effect of a dual-modality (written and spoken) literacy-appropriate educational strategy on patients' knowledge of and safe use of opioid analgesics.This was a prospective, randomized controlled trial. Consecutive discharged patients at an urban academic ED (88,000 visits) with new prescriptions for hydrocodone-acetaminophen were enrolled. Patients were randomized to receive either usual care or the educational intervention. The educational intervention was a one-page information sheet about hydrocodone-acetaminophen, which was both given to the patients and read aloud by the research assistant (nonblinded). Follow-up phone calls were conducted 4 to 7 days after the visit to assess patient knowledge about the medication and self-report of activities associated with safety of use (e.g., double-dipping with acetaminophen, storage, use with alcohol or while driving).A total of 274 patients were enrolled; 210 completed follow-up (110 usual care and 100 intervention). No significant differences in baseline characteristics emerged between the study arms; 42% were male, and 51% were white, with a median age of 43 years. Half of patients had non-back pain orthopedic injuries (49.5%). On follow-up, overall knowledge was poor, with only 28% able to name both active ingredients in the medication. The intervention group had better knowledge of precautions related to taking additional acetaminophen (usual care 18.2%, 95% confidence interval [CI] = 10.9% to 25.5% vs. intervention 38%, 95% CI = 28.3% to 47.7%; difference = 27.6, 95% CI of difference = 21.5 to 33.7) and knowledge of side effects (usual care median = 1, interquartile range [IQR] 0 to 2 vs. intervention median = 2, IQR = 1 to 2; p0.0001). Additionally, those who received the intervention were less likely to have reported driving within 6 hours after taking hydrocodone (usual care 13.6%, 95% CI = 7.2% to 20% vs. intervention 3%, 95% CI = -0.3% to 6.3%; difference = 10.6, 95% CI of difference = 3.4 to 17.9). There was no difference between groups related to knowledge about drinking alcohol while taking hydrocodone (overall 18.1%) or knowledge that the opioid could be addictive (overall 72.4%).This simple strategy improved several, but not all, aspects of patient knowledge and resulted in fewer patients in the intervention arm driving while taking hydrocodone. Integration of a patient education document into conversations about opioids holds promise for improving patient knowledge about these high-risk medications.

Objective Benzodiazepines and opioids are prescribed simultaneously (i.e. “co-prescribed”) in many clinical settings, despite guidelines advising against this practice and mounting evidence that concomitant use of both medications increases overdose risk. This study sought to characterize the contexts in which benzodiazepine-opioid co-prescribing occurs and providers’ reasons for co-prescribing. Methods We conducted focus groups with ED providers (resident and attending physicians, advanced practice providers, and pharmacists) from three hospitals using semi-structured interviews to elicit perspectives on benzodiazepine-opioid co-prescribing. Discussions were audio-recorded and transcribed. We performed qualitative content analysis of the resulting transcripts using a consensual qualitative research approach, aiming to identify priority categories that describe the phenomenon of benzodiazepine-opioid co-prescribing. Results Participants acknowledged co-prescribing rarely and reluctantly, and often provided specific discharge instructions when co-prescribing. The decision to co-prescribe is multifactorial, often isolated to specific clinical and situational contexts (e.g. low back pain, failed solitary opioid therapy) and strongly influenced by a provider's beliefs about the efficacy of combination therapy. The decision to co-prescribe is further influenced by a self-imposed pressure to escalate care or avoid hospital admission. When considering potential interventions to reduce the incidence of co-prescribing, participants opposed computerized alerts but were supportive of a pharmacist-assisted intervention. Many providers found the process of participating in peer discussions on prescribing habits to be beneficial. Conclusions In this qualitative study of ED providers, we found that benzodiazepine-opioid co-prescribing occurs in specific clinical and situational contexts, such as the treatment of low back pain or failed solitary opioid therapy. The decision to co-prescribe is strongly influenced by a provider's beliefs and by self-imposed pressure to escalate care or avoid admission. This article is protected by copyright. All rights reserved.

Objective The objective was to characterize geriatric patients’ use of online health information (OHI) relative to younger adults and assess their comfort with OHI compared to health information (HI) from their physician. Methods This was a prospective cross-sectional survey study of adult ED patients. The survey assessed patients’ self-reported use of OHI in the past year and immediately prior to ED visit and analyzed differences across 4 age groups: 18-39, 40-64, 65-74, and 75+. Patients’ ability to access, understand, and trust OHI was assessed using a 7 point Likert scale and compared to parallel questions regarding HI obtained from their doctor. Patient use of OHI was compared across age groups. Comfort with OHI and HI obtained from a doctor was compared across age groups using the Kruskall Wallis test. Comparisons between sources of health information were made within age groups using the Wilcoxan signed rank test. Results Of 889 patients who were approached for study inclusion 723 patients (81.3%) completed the survey. The majority of patients had used OHI in the last year in all age groups, but older patients were less likely to have used OHI: age 18-39: 90.3%, 40-64: 85.3%, 65-74: 76.4% and 75+: 50.7%, p

Introduction: Emergency department (ED) patients’ Internet search terms prior to arrival have notbeen well characterized. The objective of this analysis was to characterize the Internet search termspatients used prior to ED arrival and their relationship to final diagnoses. Methods: We collected data via survey; participants listed Internet search terms used. Terms wereclassified into categories: symptom, specific diagnosis, treatment options, anatomy questions,processes of care/physicians, or “other.” We categorized each discharge diagnosis as either symptombasedor formal diagnosis. The relationship between the search term and final diagnosis was assignedto one of four categories of search/diagnosis combinations (symptom search/symptom diagnosis,symptom search/formal diagnosis, diagnosis search/symptom diagnosis, diagnosis search/formaldiagnosis), representing different “trajectories.” Results : We approached 889 patients; 723 (81.3%) participated. Of these, 177 (24.5%) used theInternet prior to ED presentation; however, seven had incomplete data (N=170). Mean age was 47years (standard deviation 18.2); 58.6% were female and 65.7% white. We found that 61.7% searchedsymptoms and 40.6% searched a specific diagnosis. Most patients received discharge diagnoses ofequal specificity as their search terms (34% flat trajectory-symptoms and 34% flat trajectory-diagnosis).Ten percent searched for a diagnosis by name but received a symptom-based discharge diagnosiswith less specificity. In contrast, 22% searched for a symptom and received a detailed diagnosis.Among those who searched for a diagnosis by name (n=69) only 29% received the diagnosis that theyhad searched. Conclusion : The majority of patients used symptoms as the basis of their pre-ED presentation Internetsearch. When patients did search for specific diagnoses, only a minority searched for the diagnosisthey eventually received. [West J Emerg Med. 2017;18(5)928-936.]

Older adults account for a large and growing segment of the emergency department (ED) population. They are often admitted to the hospital for nonurgent conditions such as dementia, impaired functional status, and gait instability. The aims of this geriatric ED innovations (GEDI) project were to develop GEDI nurse liaisons by training ED nurses in geriatric assessment and care coordination skills, describe characteristics of patients that these GEDI nurse liaisons see, and measure the admission rate of these patients. Four ED nurses participated in the GEDI training program, which consisted of 82 hours of clinical rotations in geriatrics and palliative medicine, 82 hours of didactics, and a pilot phase for refinement of the GEDI consultation process. Individuals were eligible for GEDI consultation if they had an Identification of Seniors At Risk (ISAR) score greater than 2 or at ED clinician request. GEDI consultation was available Monday through Friday from 9:00 a.m. to 8:00 p.m. An extensive database was set up to collect clinical outcomes data for all older adults in the ED before and after GEDI implementation. The liaisons underwent training from January through March 2013. From April through August 2013, 408 GEDI consultations were performed in 7,213 total older adults in the ED (5.7%, 95% confidence interval (CI) = 5.2-6.2%), 2,124 of whom were eligible for GEDI consultation (19.2%, 95% CI = 17.6-20.9%); 34.6% (95% CI = 30.1-39.3%) received social work consultation, 43.9% (95% CI = 39.1-48.7) received pharmacy consultation, and more than 90% received telephone follow-up. The admission rate for GEDI patients was 44.9% (95% CI = 40.1-49.7), compared with 60.0% (95% CI = 58.8-61.2) non-GEDI. ED nurses undergoing a 3-month training program can develop geriatric-specific assessment skills. Implementation of these skills in the ED may be associated with fewer admissions of older adults.

Whiplash injury is a common consequence of motor vehicle crashes (MVC), yet it is also one of the most poorly understood. While more than 50% of those injured should expect to rapidly recover, others are not as fortunate with approximately 25% of those exposed to and injured in an MVC transitioning from acute to chronic pain and disability. The purpose of this prospective study was to determine if the severity and direction of collisions involving participants enrolled in a longitudinal study of recovery from whiplash are able to differentiate between different recovery groups based on the neck disability index (NDI) percentage scores at 3-months, and if these crash specific parameters are associated with known risk factors for recovery. Here, we examined objective collision data, repair invoices, and characteristics of the crash for 37 acutely injured participants consented and enrolled at their emergency department visit and further assessed at three time points; < 1 week, 2-weeks, and 3-months post MVC. Collision data were used to reconstruct and estimate the severity of the crash and determine if they aligned with the heterogeneity of whiplash injury recovery. Wilcoxon rank sum tests were used to determine if % scores on the Neck Disability Index (NDI) at 3-months post MVC were associated with the following variables: sex, head turned at time of impact, seatbelt use, whether or not airbags deployed, if the vehicle was struck while stopped or while turning, or the principle direction of force (PDOF). Spearman’s correlation coefficients were used to determine if NDI at 3-months post MVC was associated with age, Body Mass Index, pain-related disability at baseline, signs of post-traumatic distress, intrusion/hyperarousal, negative affect, pain intensity, estimated speed change from the impact, and damage estimates (in US$). There was a significant positive association between self-reported neck disability at 3-months post MVC, post-traumatic distress, negative affect and uncontrolled pain. There was no direct effect of participant characteristics, arousal, intrusion/hyperarousal sub-score, damage, PDOF, speed change, or other crash characteristics. Established crash parameters were not associated with the heterogeneity of whiplash injury recovery in a small sample of injured participants.

Treatment options for massive and submassive pulmonary embolus may include hemodynamic support, fibrinolysis, anticoagulation, and thrombectomy. Selection of the appropriate therapy requires scrutiny of the patient's hemodynamic status, preexisting conditions, risk of complications, and availability of services at the treatment center. This article illustrates a case of successful fibrinolysis and thrombectomy in a woman with massive pulmonary embolus. A discussion of the indications, benefits, and disadvantages of several pharmacologic, radiologic, and surgical interventions considered in pulmonary embolus will follow.

Objectives The primary individual research career development awards for emergency medicine (EM) investigators are the K08 and K23 awards. To the best of the authors’ knowledge, postaward productivity of EM K08 and K23 awardees has not been previously described. The objectives were to describe EM researchers who have received K08 or K23 awards and to evaluate their postaward federal funding and publications. Methods This was a cross-sectional study, conducted during January 2012, of clinician-scientists who previously completed EM residency or fellowship programs and have received K08 or K23 awards from the National Institutes of Health (NIH) or Agency for Healthcare Research and Quality (AHRQ) between fiscal years 2000 through 2011. Awardees were identified through the NIH reporting tool (NIH RePORTER). Postaward funding was abstracted, including R01-equivalent funding for K awardees who completed their K training by the end of the 2011 fiscal year. Postaward publications (with journal impact factor) were tabulated for all K awardees using PubMed and Journal Citation Reports. An e-mail survey was also conducted during September and October 2012 to describe the awardee characteristics (demographics and research background) of all EM K awardees using REDCap electronic data captures tools. Simple descriptive statistics are reported. Results Sixty-three EM awardees were identified; 24 (38%) were K08 awardees, and 39 (62%) were K23 awardees. Of the 38 (60%) awardees who completed their K training, 16 (42%) obtained subsequent federal funding, with six (16%) obtaining R01 funding (median time from end of K award to R01 award was 4.5 years). Overall, EM awardees published a mean (±SD) of 4.0 (±1.3) manuscripts per year (after the start of their K awards); the mean (±SD) impact factor of the journals in which these manuscripts were published was 4.5 (±5.7). Forty-five (71%) of EM K awardees responded to the survey. Respondents had a median age of 36 years (interquartile range [IQR] = 35 to 38 years), and 33 were male (73%). The median time from completion of residency to start of the K award was 6 years (IQR = 4 to 7 years), with 27 (60%) completing a research fellowship prior to the K award. Conclusions Over 40% of EM K awardees who completed their career development training subsequently obtained federal funding as principal investigator (PI) or co-PI, while approximately one in six obtained R01 equivalent funding. Given the numerous barriers facing emergency care researchers, EM K awardees demonstrate good postaward productivity. Resumen Descripcion y Productividad de los Investigadores de Medicina de Urgencias y Emergencias que Recibieron Becas de Formacion de Carrera Investigadora Supervisada K23 o K08 Objetivos Las principales becas individuales de formacion para la carrera investigadora en medicina de urgencias y emergencias (MUE) son las becas K08 y K23. Segun el conocimiento de los autores, no se ha descrito previamente la productividad tras las becas K08 y K23. Los objetivos fueron describir los investigadores de MUE que recibieron una beca K08 o K23, y evaluar sus publicaciones y ayudas publicas tras la beca. Metodologia Estudio transversal de investigadores clinicos que completaron previamente una residencia en MUE o una beca de investigacion y que habian recibido una beca K08 o K23 de los National Institutes of Health (NIH) o de la Agency for Healthcare Research & Quality (AHRQ) durante los anos 2000 a 2011, y que se llevo a cabo en enero del 2012. Los becados se identificaron a traves de las tablas publicadas por los NIH (NIH RePORTER). Se resumio la ayuda tras la beca, que incluyo la ayuda equivalente al R01 para becados K que completaron sus formacion K al final del ano 2011. Las publicaciones tras la beca (con el factor impacto de la revista) se tabularon para todos los becados K mediante PubMed y Journal Citation Reports. Se llevo a cabo tambien una encuesta a traves de correo electronico durante septiembre y octubre de 2012 para describir las caracteristicas (demograficas y experiencia investigadora) de todos los becados K de MUE usando las tablas de captura de datos electronicas REDCap. Se presentaron las estadisticas descriptivas. Resultados Se identificaron 63 becados de MUE, 24 (38%) fueron recibieron becas K08, y 39 (62%) becas K23. De los 38 (60%) becados que completaron su formacion K, 16 (42%) obtuvieron ayudas publicas posteriormente y 6 (16%) obtuvieron ayudas R01 (mediana de tiempo entre el final de la beca K y la beca R01 de 4,5 anos). De todos, los becados de MUE publicaron una media de 4,0 (desviacion estandar [DE] ±1.3) articulos por ano (tras el inicio de su beca K), con una media de puntuacion de factor de impacto de la revista a 5 anos de 4,5 (DE ±5,7) por publicacion. Cuarenta y cinco (71%) de los becados K de MUE respondieron a la encuesta. Los respondedores tenia una mediana de edad de 36 anos (RIC 35 a 38 anos) y 33 fueron varones (73%). La mediana de tiempo desde que se finalizo la residencia hasta el inicio de la beca K fue de 6 anos (RIC 4 a 7 anos), con 27 (60%) que completaron un programa de una beca de investigacion previamente a la obtencion de la beca K. Conclusiones Mas del 40% de los becados K de MUE que completaron su formacion obtuvieron ayudas publicas como investigador principal o coinvestigador, mientras que aproximadamente uno de cada seis obtuvo ayudas equivalentes a R01. Dadas las numerosas barreras para los investigadores en MUE, los becarios de MUE demuestran una buena productividad tras la beca.

Background Severe sepsis is a high-mortality disease, and early resuscitation decreases mortality. Do-not-resuscitate (DNR) status may influence physician decisions beyond cardiopulmonary resuscitation, but this has not been investigated in sepsis. Objective Among Emergency Department (ED) severe sepsis patients, define the incidence of DNR status, prevalence of central venous catheter placement, and vasopressor administration (invasive measures), and mortality. Methods Retrospective observational cohort of consecutive severe sepsis patients to single ED in 2009–2010. Charts abstracted for DNR status on presentation, demographics, vitals, Sequential Organ Failure Assessment (SOFA) score, inpatient and 60-day mortality, and discharge disposition. Primary outcomes were mortality, discharge to skilled nursing facility (SNF), and invasive measure compliance. Chi-squared test was used for univariate association of DNR status and outcome variables; multivariate logistic regression analyses for outcome variables controlling for age, gender, SOFA score, and DNR status. Results In 376 severe sepsis patients, 50 (13.3%) had DNR status. DNR patients were older (79.2 vs 60.3 years, p p = 0.07). DNR inpatient and 60-day mortalities were higher (50.5% vs. 19.6%, 95% confidence interval [CI] 15.9–44.9%; 64.0% vs. 24.9%, 95% CI 25.1–53.3%, respectively), and remained higher in multivariate logistic regression analysis (odds ratio [OR] 3.01, 95% CI 1.48–6.17; OR 3.80, 95% CI 1.88–7.69, respectively). The groups had similar rates of discharge to SNF, and in persistently hypotensive patients (n = 326) had similar rates of invasive measures in univariate and multivariate analyses (OR 1.19, 95% CI 0.45–3.15). Conclusion In this sample, 13.3% of severe sepsis patients had DNR status, and 50% of DNR patients survived to hospital discharge. DNR patients received invasive measures at a rate similar to patients without DNR status.

Background Prior retrospective studies suggest that statins may benefit patients with community-acquired pneumonia (CAP) due to antiinflammatory and immunomodulatory effects. However, prospective studies of the impact of statins on CAP outcomes are needed. We determined whether statin use was associated with improved outcomes in adults hospitalized with CAP. Methods Adults aged ≥18 years hospitalized with CAP were prospectively enrolled at 3 hospitals in Chicago, Illinois, and 2 hospitals in Nashville, Tennessee, from January 2010-June 2012. Adults receiving statins before and throughout hospitalization (statin users) were compared with those who did not receive statins (nonusers). Proportional subdistribution hazards models were used to examine the association between statin use and hospital length of stay (LOS). In-hospital mortality was a secondary outcome. We also compared groups matched on propensity score. Results Of 2016 adults enrolled, 483 (24%) were statin users; 1533 (76%) were nonusers. Statin users were significantly older, had more comorbidities, had more years of education, and were more likely to have health insurance than nonusers. Multivariable regression demonstrated that statin users and nonusers had similar LOS (adjusted hazard ratio [HR], 0.99; 95% confidence interval [CI], .88-1.12), as did those in the propensity-matched groups (HR, 1.03; 95% CI, .88-1.21). No significant associations were found between statin use and LOS or in-hospital mortality, even when stratified by pneumonia severity. Conclusions In a large prospective study of adults hospitalized with CAP, we found no evidence to suggest that statin use before and during hospitalization improved LOS or in-hospital mortality.

Background Communication is considered a core competency for physicians. However, the Emergency Department setting poses significant and unique communication challenges. Objective The objective of this study was to explore self-reported use and perceptions of effectiveness and feasibility of communication techniques used by Emergency Physicians for communication with patients. Methods This cross-sectional study utilized a previously published survey on eight communication techniques. Respondents were asked to quantify their personal use and perceptions of effectiveness and feasibility of each technique. Responses were analyzed for differences based on practice setting (community, academic) and provider role (attending, resident). The survey was administered to a convenience sample recruited at the national meeting of the American College of Emergency Physicians. Results One hundred and sixty-nine participants were enrolled (70.5% male; 55.8% attending physicians, 44.2% residents; 66.2% practiced in academic settings). Using simple language and speaking slowly to patients were the only techniques identified as being used routinely by a majority of the sample (92.2% and 61.3%, respectively). A majority of the sample ranked seven of the techniques as effective; all techniques were considered feasible in the Emergency Department. No differences were noted across provider role or practice setting. Conclusion The majority of respondents are not utilizing communication techniques, despite their own beliefs that the techniques are effective and easy to implement in the Emergency Department. Additional research is needed to determine the effectiveness of these techniques and relevant barriers to their use.

The 6-minute walk test (6MWT) is a single measurement of functional status in patients with cardiovascular disease. It has not been studied at high altitude. We investigate the screening value of 6-minute walk distance (6MWD) and postexercise vital sign (VS) measurements as predictors of successfully reaching the summit or development of acute mountain sickness (AMS) on Aconcagua (6962 m).Prospective observational cohort in Aconcagua Provincial Park, Argentina. Adults climbing the normal route who registered with base camp physicians were included. There were no exclusion criteria. VSs were measured before (resting) and after (postexercise) completion of 6MWT while volunteers acclimatized at Plaza de Mulas base camp (4365 m). Volunteers proceeded towards the summit at their own pace and upon descent returned a questionnaire with maximum altitude reached and Lake Louise AMS Self-report Score (LLSelf).One hundred twenty-four volunteers completed the 6MWT. Sixty-four volunteers (51.6%) completed questionnaires; 56% summited. Median LLSelf was 4 (IQR: 3.0-6.5). There was no association between any resting or postexercise VS measurements and AMS. However, mean postexercise SpO(2) was 80.8% in summiters and 76.4% in nonsummiters, a difference of -4.4% (95% CI: -6.7 to -2.0, p = 0.0005). Postexercise SpO(2)75% had 97.2% sensitivity and negative likelihood ratio of 0.086 in predicting the outcome of successfully reaching the summit: only one climber with SpO(2)75% successfully reached the summit.This study provides the first published data on 6MWD recorded in the field at high altitude. Postexercise SpO(2)75% may be a useful screening test for predicting the outcome of successfully reaching the summit of Aconcagua.

Pulmonary embolism (PE) decreases the exhaled end-tidal ratio of carbon dioxide to oxygen (etCO(2)/O(2)).To test if the etCO(2)/O(2) can produce clinically important changes in the probability of segmental or larger PE on computerized tomography multidetector-row pulmonary angiography (MDCTPA) in a moderate-risk population with a positive D-dimer.Emergency department and hospitalized patients with one or more predefined symptoms or signs, one or more risk factors for PE, and 64-slice MDCTPA enrolled from four hospitals. D-dimer greater than 499 ng/ml was test(+), and D-dimer less than 500 ng/ml was test(-). The median etCO(2)/O(2) less than 0.28 from seven or more breaths was test(+) and etCO(2)/O(2) greater than 0.45 was test(-). MDCTPA images were read by two independent radiologists and the criterion standard was the interpretation of acute PE by either reader. PE size was then graded.We enrolled 495 patients, including 60 (12%) with segmental or larger, and 29 (6%) with subsegmental PE. A total of 367 (74%) patients were D-dimer(+), including all 60 with segmental or larger PE (posterior probability 16%). The combination of D-dimer(+) and etCO(2)/O(2)(+) increased the posterior probability of segmental or larger PE to 28% (95% confidence interval [CI] for difference of 12%, 3.0-22%). The combination of D-dimer(+) and etCO(2)/O(2)(-) was observed in 40 patients (8%; 95% CI, 6-11%), and none (0/40; 95% CI, 0-9%) had segmental or larger PE on MDCTPA. No strategy changed the prevalence of subsegmental PE.In moderate-risk patients with a positive D-dimer, the et etCO(2)/O(2) less than 0.28 significantly increases the probability of segmental or larger PE and the etCO(2)/O(2) greater than 0.45 predicts the absence of segmental or larger PE on MDCTPA.

Objectives: To determine whether there is a difference in time to initial analgesic for patients with acute pain from sickle cell disease (SCD) versus renal colic (RC) and to identify factors contributing to variance in time to analgesic. Methods: A retrospective cohort study of the adult emergency department (ED) patients with acute pain from SCD and RC in an urban ED (final ED discharge ICD-9 diagnosis codes were included). A structured medical record review abstracted the demographics, arrival shift, triage level, initial pain score, triage time, and time of initial analgesic dose. Data were compared with Kaplan-Meier plots of time to initial analgesic for both RC and SCD with the log-rank test to test for differences by disease category. A multivariable Cox regression model estimated differences in time to initial analgesic by disease category while controlling for other possible confounders. Results: Median time to initial analgesic was 80 minutes for patients with SCD (interquartile range, 48 to 145) versus 50 minutes for patients with RC (interquartile range: 30 to 96). Patients with SCD reported a higher pain score on arrival when compared with RC patients and were more frequently assigned a higher triage priority level (P = 0.05). Covariates that contributed the most delays to the model were afternoon arrival [hazard ratio (HR): 0.35, P < 0.01], low acuity triage level (HR: 0.42, P < 0.01), SCD diagnosis (HR: 0.61, P < 0.01), and inability to obtain intravenous access (HR: 0.71, P = 0.01). Discussion: ED patients with SCD experienced longer delays in the administration of the initial analgesic compared with RC patients, despite higher arrival pain scores and triage acuity levels.

Study objective Use of contrast-enhanced computed tomography (CT) of the pulmonary arteries to evaluate for pulmonary embolism has increased, raising concern about radiation and contrast toxicity. We sought to measure the frequency of repeat CT pulmonary angiography in emergency department (ED) patients. Methods This was a prospective, longitudinal follow-up of ED patients who underwent first-time CT pulmonary angiography as part of a research protocol for diagnosis of pulmonary embolism in 2001 to 2002. Two authors (DMB and MCK) searched electronic medical record databases to measure the frequency of repeated CT scans performed within 5 years. Primary outcome was greater than or equal to 1 repeated CT pulmonary angiography examination. Radiologist-written interpretations of CT pulmonary angiography were categorized by 2 observers (DMB and JAK). Cox regression was used to estimate hazard ratios for 24 clinical variables. Results A cohort of 675 ED patients was observed for a median of 1,989 days: 226 of 675 (33%) had at least 1 additional CT pulmonary angiography scan, and 60 died with no repeated CT pulmonary angiography, leading to a mortality-adjusted frequency of repeated CT pulmonary angiography scanning of 226 of 615, or 37%. Seventy-three percent of the cohort had 1 or more subsequent CT scans of any body part, and 31 patients (5%) had 5 or more repeated CT pulmonary angiography scans. The pulmonary embolism (positive) prevalence was 57 of 675 (8.4%; 95% confidence interval [CI] 6.5% to 10.8%) on the first CT pulmonary angiography versus 8 of 226 (3.5%; 95% CI 1.5% to 6.9%) on the second CT pulmonary angiography scan. Hazard ratios indicated that respiratory rate, active malignancy, previous coronary artery disease, and previous or new diagnosis of venous thromboembolism were positively associated with repeated CT pulmonary angiography scanning. Conclusion At least one third of ED patients who undergo CT pulmonary angiography scanning will have a second CT pulmonary angiography result that will be negative for pulmonary embolism. New methods are needed to exclude pulmonary embolism recurrence without use of ionizing radiation.