Mortality and risk factors associated with misdiagnosis of acute aortic syndrome in Ontario, Canada: a population-based study.

INTRODUCTION: Acute aortic syndrome (AAS) is a life-threatening aortic emergency. It describes three diagnoses: acute aortic dissection, acute intramural haematoma and penetrating atherosclerotic ulcer. Unfortunately, there are no accurate estimates of the miss rate for AAS, risk factors for missed diagnosis or its effect on outcomes. METHODS: A population-based retrospective cohort study of anonymously linked data for residents of Ontario, Canada, was carried out. Incident cases of AAS were identified between 2003 and 2018 using a validated algorithm based on ICD codes and death. Before multivariate modelling, all categorical variables were analysed for an association with missed AAS diagnosis using χ2 tests. These preliminary analyses were unadjusted for clustering or any covariates. Finally, we performed multilevel logistic regression analysis using a generalised linear mixed model approach to model the probability of a missed case occurring. RESULTS: There were 1299 cases of AAS (age mean (SD) 68.03±14.70, woman 500 (38.5%), rural areas (n=111, 8.55%)) over the study period. Missed cases accounted for 163 (12.5%) of the cohort. Mortality (non-missed AAS 59.7% vs missed AAS 54.6%) and surgical intervention (non-missed AAS 31% vs missed AAS 30.7%) were similar in missed and non-missed cases. However, lower acuity (Canadian triage acuity scale >2 (OR 2.45 95% CI 1.71 to 3.52) (the scale is from 1 to 5, with 1 indicating high acuity) had a higher odds of being a missed case and non-ambulatory presentation (OR 0.47 95% CI 0.33 to 0.67) and presenting to a teaching (OR 0.60 95% CI 0.40 to 0.90)) or cardiac centre (OR 0.41 95% CI 0.27 to 0.62) were associated with a lower odds of being a missed case. CONCLUSIONS: The high rate of misdiagnosis has remained stable for over a decade. Non-teaching and non-cardiac hospitals had a higher incidence of missed cases. Mortality and rates of surgery were not associated with a missed diagnosis of AAS. Educational interventions should be prioritised in non-teaching hospitals and non-cardiac centres.

ACR Appropriateness Criteria® Pulsatile Abdominal Mass, Suspected Abdominal Aortic Aneurysm: 2023 Update.

Abdominal aortic aneurysm (AAA) is defined as abnormal dilation of the infrarenal abdominal aortic diameter to 3.0 cm or greater. The natural history of AAA consists of progressive expansion and potential rupture. Although most AAAs are clinically silent, a pulsatile abdominal mass identified on physical examination may indicate the presence of an AAA. When an AAA is suspected, an imaging study is essential to confirm the diagnosis. This document reviews the relative appropriateness of various imaging procedures for the initial evaluation of suspected AAA. The American College of Radiology Appropriateness Criteria are evidence-based guidelines for specific clinical conditions that are reviewed annually by a multidisciplinary expert panel. The guideline development and revision process support the systematic analysis of the medical literature from peer reviewed journals. Established methodology principles such as Grading of Recommendations Assessment, Development, and Evaluation or GRADE are adapted to evaluate the evidence. The RAND/UCLA Appropriateness Method User Manual provides the methodology to determine the appropriateness of imaging and treatment procedures for specific clinical scenarios. In those instances where peer reviewed literature is lacking or equivocal, experts may be the primary evidentiary source available to formulate a recommendation.

Can you accurately rule out acute aortic syndrome by restricting imaging of the aorta to the area of the patient's pain?

BACKGROUND: Acute aortic syndrome (AAS) is a life-threatening condition necessitating timely and accurate diagnosis for appropriate treatment. Currently, the only way to rule out the diagnosis is advanced imaging. The most accessible is computed tomography of the entire aorta. Most scans are negative, exposing patients to radiation, increased time in the emergency department (ED), and non-significant incidental findings. This study investigated whether restricting imaging to the area of aortic-related pain accurately rules out AAS. METHODS: A health records review was conducted on consecutive cases from three academic EDs between 2015 and 2020. Data were extracted and verified from multiple sources. Participants included adults diagnosed with AAS based on radiological evidence. The diagnostic performance of the restricted imaging strategy was assessed; sensitivity and likelihood ratios with 95% confidence intervals were calculated. RESULTS: Data from 149 cases of AAS were collected, with the majority presenting with chest pain (46%) or abdominal pain (24%). The restricted imaging strategy demonstrated a sensitivity of 96% (95% CI 91.4-98.5%) in ruling out AAS. In a subset of patients with systolic blood pressure > 90 mmHg and without aortic aneurysm/repair (n = 86), the sensitivity was 100% (95% CI 96-100%). CONCLUSION: Restricting imaging to the area of pain in hemodynamically stable patients without known aortic aneurysm provides a highly sensitive approach to ruling out AAS.

Evaluation of the Canadian Clinical Practice Guidelines Risk Prediction Tool for Acute Aortic Syndrome: The RIPP Score.

Introduction: Acute aortic syndrome (AAS) is a rare clinical syndrome with a high mortality rate. The Canadian clinical practice guideline for the diagnosis of AAS was developed in order to reduce the frequency of misdiagnoses. As part of the guideline, a clinical decision aid was developed to facilitate clinician decision-making (RIPP score). The aim of this study is to validate the diagnostic accuracy of this tool and assess its performance in comparison to other risk prediction tools that have been developed. Methods: This was a historical case-control study. Consecutive cases and controls were recruited from three academic emergency departments from 2002-2020. Cases were identified through an admission, discharge, or death certificated diagnosis of acute aortic syndrome. Controls were identified through presenting complaint of chest, abdominal, flank, back pain, and/or perfusion deficit. We compared the clinical decision tools' C statistic and used the DeLong method to test for the significance of these differences and report sensitivity and specificity with 95% confidence intervals. Results: We collected data on 379 cases of acute aortic syndrome and 1340 potential eligible controls; 379 patients were randomly selected from the final population. The RIPP score had a sensitivity of 99.7% (98.54-99.99). This higher sensitivity resulted in a lower specificity (53%) compared to the other clinical decision aids (63-86%). The DeLong comparison of the C statistics found that the RIPP score had a higher C statistic than the ADDRS (-0.0423 (95% confidence interval -0.07-0.02); P < 0.0009) and the AORTAs score (-0.05 (-0.07 to -0.02); P = 0.0002), no difference compared to the Lovy decision tool (0.02 (95% CI -0.01-0.05 P < 0.25)) and decreased compared to the Von Kodolitsch decision tool (0.04 (95% CI 0.01-0.07 P < 0.008)). Conclusion: The Canadian clinical practice guideline's AAS clinical decision aid is a highly sensitive tool that uses readily available clinical information. It has the potential to improve diagnosis of AAS in the emergency department.

Impact of community-based interventions on out-of-hospital cardiac arrest outcomes: a systematic review and meta-analysis.

Survival following out-of-hospital cardiac arrest (OHCA) remains low, typically less than 10%. Bystander cardiopulmonary resuscitation (CPR) and bystander-AED use have been shown to improve survival by up to fourfold in individual studies. Numerous community-based interventions have been implemented worldwide in an effort to enhance rates of bystander-CPR, bystander-AED use, and improve OHCA survival. This systematic review and meta-analysis aims to evaluate the effect of such interventions on OHCA outcomes. Medline and Embase were systematically searched from inception through July 2021 for studies describing the implementation and effect of one or more community-based interventions targeting OHCA outcomes. Two reviewers screened articles, extracted data, and evaluated study quality using the Newcastle-Ottawa Scale. For each outcome, data were pooled using random-effects meta-analysis. Of the 2481 studies identified, 16 met inclusion criteria. All included studies were observational. They reported a total of 1,081,040 OHCAs across 11 countries. The most common interventions included community-based CPR training (n = 12), community-based AED training (n = 9), and dispatcher-assisted CPR (n = 8). Health system interventions (hospital or paramedical services) were also described in 11 of the included studies. Evidence certainty among all outcomes was low or very low according to GRADE criteria. On meta-analysis, community-based interventions with and without health system interventions were consistently associated with improved OCHA outcomes: rates of bystander-CPR, bystander-AED use, survival, and survival with a favorable neurological outcome. Bystander CPR-14 studies showed a significant increase in post-intervention bystander-CPR rates (n = 285 752; OR 2.26 [1.74, 2.94]; I2 = 99%, and bystander AED use (n = 37 882; OR 2.08 [1.44, 3.01]; I2 = 54%) and durvival-10 studies, pooling survival to hospital discharge and survival to 30 days (n = 79 206; OR 1.59 [1.20, 2.10]; I2 = 95%. The results provide foundational support for the efficacy of community-based interventions in enhancing OHCA outcomes. These findings inform our recommendation that communities, regions, and countries should implement community-based interventions in their pre-hospital strategy for OHCA. Further research is needed to identify which specific intervention types are most effective.

Guidelines for reasonable and appropriate care in the emergency department 3 (GRACE-3): Acute dizziness and vertigo in the emergency department.

This third Guideline for Reasonable and Appropriate Care in the Emergency Department (GRACE-3) from the Society for Academic Emergency Medicine is on the topic adult patients with acute dizziness and vertigo in the emergency department (ED). A multidisciplinary guideline panel applied the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) approach to assess the certainty of evidence and strength of recommendations regarding five questions for adult ED patients with acute dizziness of less than 2 weeks' duration. The intended population is adults presenting to the ED with acute dizziness or vertigo. The panel derived 15 evidence-based recommendations based on the timing and triggers of the dizziness but recognizes that alternative diagnostic approaches exist, such as the STANDING protocol and nystagmus examination in combination with gait unsteadiness or the presence of vascular risk factors. As an overarching recommendation, (1) emergency clinicians should receive training in bedside physical examination techniques for patients with the acute vestibular syndrome (AVS; HINTS) and the diagnostic and therapeutic maneuvers for benign paroxysmal positional vertigo (BPPV; Dix-Hallpike test and Epley maneuver). To help distinguish central from peripheral causes in patients with the AVS, we recommend: (2) use HINTS (for clinicians trained in its use) in patients with nystagmus, (3) use finger rub to further aid in excluding stroke in patients with nystagmus, (4) use severity of gait unsteadiness in patients without nystagmus, (5) do not use brain computed tomography (CT), (6) do not use routine magnetic resonance imaging (MRI) as a first-line test if a clinician trained in HINTS is available, and (7) use MRI as a confirmatory test in patients with central or equivocal HINTS examinations. In patients with the spontaneous episodic vestibular syndrome: (8) search for symptoms or signs of cerebral ischemia, (9) do not use CT, and (10) use CT angiography or MRI angiography if there is concern for transient ischemic attack. In patients with the triggered (positional) episodic vestibular syndrome, (11) use the Dix-Hallpike test to diagnose posterior canal BPPV (pc-BPPV), (12) do not use CT, and (13) do not use MRI routinely, unless atypical clinical features are present. In patients diagnosed with vestibular neuritis, (14) consider short-term steroids as a treatment option. In patients diagnosed with pc-BPPV, (15) treat with the Epley maneuver. It is clear that as of 2023, when applied in routine practice by emergency clinicians without special training, HINTS testing is inaccurate, partly due to use in the wrong patients and partly due to issues with its interpretation. Most emergency physicians have not received training in use of HINTS. As such, it is not standard of care, either in the legal sense of that term ("what the average physician would do in similar circumstances") or in the common parlance sense ("the standard action typically used by physicians in routine practice").

Staffing rural emergency departments in Ontario: The who, what and where.

Introduction: The emergency department (ED) in rural communities is essential for providing care to patients with urgent medical issues and those unable to access primary care. Recent physician staffing shortages have put many EDs at risk of temporary closure. Our goal was to describe the demographics and practices of the rural physicians providing emergency medicine services across Ontario in order to inform health human resource planning. Methods: The ICES Physician database (IPDB) and Ontario Health Insurance Plan (OHIP) billing database from 2017 were used in this retrospective cohort study. Rural physician data were analysed for demographic, practice region and certification information. Sentinel billing codes (i.e., a billing code unique to a particular clinical service) were used to define 18 unique physician services. Results: A total of 1192 physicians from the IPDB met inclusion as rural generalist physicians out of a total of 14,443 family physicians in Ontario. From this physician population, a total of 620 physicians practised emergency medicine which accounted for 33% of their days worked on average. The majority of physicians practising emergency medicine were between the ages of 30 and 49 and in their first decade of practice. The most common services in addition to emergency medicine were clinic, hospital medicine, palliative care and mental health. Conclusion: This study provides insight into the practice patterns of rural physicians and the basis for better targeted physician workforce-forecasting models. A new approach to education and training pathways, recruitment and retention initiatives and rural health service delivery models is needed to ensure better health outcomes for our rural population.

Résumé Introduction: Le service d'urgence des communautés rurales est essentiel pour la prise en charge des patients présentant des problèmes médicaux urgents et de ceux qui ne peuvent accéder aux soins primaires. En raison de la récente pénurie de médecins, de nombreux services d'urgence risquent de fermer temporairement. Notre objectif était de décrire les caractéristiques démographiques et les pratiques des médecins ruraux qui fournissent des services de médecine d'urgence en Ontario afin d'éclairer la planification des ressources humaines en santé. Méthodes: La base de données des médecins de l'ICES (IPDB) et la base de données de facturation de l'assurance-santé de l'Ontario (OHIP) de 2017 ont été utilisées dans cette étude de cohorte rétrospective. Les données sur les médecins ruraux ont été analysées pour obtenir des renseignements sur la démographie, la région de pratique et la certification. Les codes de facturation sentinelle (c'est-à-dire un code de facturation unique pour un service clinique particulier) ont été utilisés pour définir 18 services médicaux uniques. Résultats: Sur un total de 14 443 médecins de famille en Ontario, 1 192 médecins de l'IPDB ont été inclus en tant que médecins généralistes ruraux. Parmi cette population de médecins, 620 pratiquaient la médecine d'urgence, ce qui représentait 33% de leurs jours de travail en moyenne. La majorité des médecins qui pratiquaient la médecine d'urgence étaient âgés de 30 à 49 ans et en étaient à leur première décennie de pratique. Les services les plus courants en plus de la médecine d'urgence étaient la clinique, la médecine hospitalière, les soins palliatifs et la santé mentale. Conclusion: Cette étude permet de mieux comprendre les modes de pratique des médecins ruraux et de jeter les bases de modèles de prévision des effectifs médicaux mieux ciblés. Une nouvelle approche des parcours d'éducation et de formation, des initiatives de recrutement et de rétention et des modèles de prestation de services de santé en milieu rural est nécessaire pour garantir de meilleurs résultats en matière de santé pour notre population rurale. Mots-clés: Médecine d'urgence, médecins ruraux, planification des ressources humaines en santé.

Development of practice recommendations based on the Canadian Syncope Risk Score and identification of barriers and facilitators for implementation.

BACKGROUND: Wide variations in emergency department (ED) syncope management exist. The Canadian Syncope Risk Score (CSRS) was developed to predict the probability of 30-day serious outcomes after ED disposition. Study objectives were to evaluate the acceptability of proposed CSRS practice recommendations among providers and patients, and identify barriers and facilitators for CSRS use to guide disposition decisions. METHODS: We conducted semi-structured interviews with 41 physicians involved in ED syncope and 35 ED patients with syncope. We used purposive sampling to ensure a variety of physician specialties and CSRS patient risk levels. Thematic analysis was completed by two independent coders with consensus meetings to resolve conflicts. Analysis proceeded in parallel with interviews until data saturation. RESULTS: The majority (97.6%; 40/41) of physicians agreed with discharge of low risk (CSRS ≤ 0) but opined that 'no follow up' changed to 'follow-up as needed'. Physicians indicated current practices do not align with the medium-risk recommendation to discharge patients with 15-day monitoring (CSRS = 1-3; due to lack of access to monitors and timely follow-up) and the high-risk recommendation (CSRS ≥ 4) to potentially discharge patients with 15-day monitoring. Physicians recommended brief hospitalization of high-risk patients due to patient safety concerns. Facilitators included the CSRS-based patient education and scores supporting their clinical gestalt. Patients reported receiving varying levels of information regarding syncope and post-ED care, were satisfied with care received and preferred less resource intensive options. CONCLUSION: Our recommendations based on the study results were: discharge of low-risk patients with physician follow-up as needed; discharge of medium-risk patients with 15-day cardiac monitoring and brief hospitalization of high-risk patients with 15-day cardiac monitoring if discharged. Patients preferred less resource intensive options, in line with CSRS recommended care. Implementation should leverage identified facilitators (e.g., patient education) and address the barriers (e.g., monitor access) to improve ED syncope care.

RéSUMé: CONTEXTE: La prise en charge des syncopes par les services d'urgence varie considérablement. Le Canadian Syncope Risk Score (CSRS) a été mis au point pour prédire la probabilité d'une issue grave à 30 jours après la prise en charge par le service des urgences. Les objectifs de l'étude étaient d'évaluer l'acceptabilité des recommandations pratiques proposées par le CSRS parmi les prestataires et les patients, et d'identifier les barrières et les facilitateurs de l'utilisation du CSRS pour guider les décisions de disposition. MéTHODES: Nous avons mené des entretiens semi-structurés avec 41 médecins impliqués dans la syncope aux urgences et 35 patients souffrant de syncope aux urgences. Nous avons utilisé un échantillonnage raisonné pour assurer une variété de spécialités médicales et de niveaux de risque pour les patients du CSRS. L'analyse thématique a été réalisée par deux codeurs indépendants, avec des réunions de consensus pour résoudre les conflits. L'analyse s'est déroulée parallèlement aux entretiens jusqu'à saturation des données. RéSULTATS: La majorité (97,6 % ; 40/41) des médecins étaient d'accord avec la sortie des patients à faible risque (CSRS ≤ 0), mais ont estimé que " pas de suivi " devait être remplacée par " suivi en fonction des besoins ". Les médecins ont indiqué que leurs pratiques actuelles ne sont pas conformes à la recommandation à risque moyen de faire sortir les patients avec une surveillance de 15 jours (CSRS = 1-3 ; en raison du manque d'accès aux moniteurs et au suivi en temps opportun) et à la recommandation à risque élevé (CSRS ≥ 4) de potentiellement faire sortir les patients avec une surveillance de 15 jours. Les médecins ont recommandé une brève hospitalisation des patients à haut risque pour des raisons de sécurité. Les facilitateurs comprenaient l'éducation des patients basée sur le CSRS et les scores soutenant leur gestalt clinique. Les patients ont déclaré avoir reçu différents niveaux d'information concernant la syncope et les soins post-urgence, étaient satisfaits des soins reçus et préféraient des options moins gourmandes en ressources. CONCLUSIONS: Nos recommandations basées sur les résultats de l'étude sont les suivantes : sortie des patients à faible risque avec suivi par un médecin si nécessaire ; la sortie des patients à risque moyen avec une surveillance cardiaque de 15 jours et une brève hospitalisation des patients à risque élevé avec une surveillance cardiaque de 15 jours en cas de sortie. Les patients ont préféré des options moins gourmandes en ressources, conformément aux soins recommandés par le CSRS. La mise en œuvre devrait s'appuyer sur les facilitateurs identifiés (par exemple, l'éducation des patients) et s'attaquer aux obstacles (par exemple, le contrôle de l'accès) pour améliorer les soins aux urgences en cas de syncope.

Efficacy of Fascia Iliaca Compartment Blocks in Proximal Femoral Fractures in the Prehospital Setting: A Systematic Review and Meta-Analysis.

INTRODUCTION: Proximal femoral fractures are characterized as one of the most common and most painful injuries sustained by patients of all ages and are associated with high rates of oligoanalgesia in the prehospital setting. Current treatments include oral and parenteral opiates and sedative agents, however regional anesthesia techniques for pain relief may provide superior analgesia with lower risk of side effects during patient transportation. The fascia iliaca compartment block (FICB) is an inexpensive treatment which is performed with minimal additional equipment, ultimately making it suitable in prehospital settings. PROBLEM: In adult patients sustaining proximal femoral fractures in the prehospital setting, what is the effect of the FICB on non-verbal pain scores (NVPS), patient satisfaction, success rate, and adverse events compared to traditional analgesic techniques? METHODS: A librarian-assisted literature search was conducted of the Cochrane Database, Ovid MEDLINE, PubMed, Ovid EMBASE, Scopus, and Web of Science indexes. Additionally, reference lists for potential review articles from the British Journal of Anesthesia, the College of Anesthetists of Ireland, the Journal of Prehospital Emergency Care, Annales Francaises d'Anesthesie et Réanimation, and the Scandinavian Journal of Trauma, Resuscitation, and Emergency Medicine were reviewed. Databases and journals were searched during the period from January 1, 1980 through July 1, 2022. Each study was scrutinized for quality and validity and was assigned a level of evidence as per Oxford Center for Evidence-Based Medicine guidelines. RESULTS: Five studies involving 340 patients were included (ie, two randomized control trials [RCTs], two observational studies, and one prospective observational study). Pain scores decreased after prehospital FICB across all included studies by a mean of 6.65 points (5.25 - 7.5) on the NVPS. Out of the total 257 FICBs conducted, there was a success rate of 230 (89.3%). Of these, only two serious adverse events were recorded, both of which related to local analgesia toxicity. Neither resulted in long-term sequelae and only one required treatment. CONCLUSION: Use of FICBs results in a significant decrease in NVPS in the prehospital setting, and they are ultimately suitable as regional analgesic techniques for proximal femur fractures. It carries a low risk of adverse events and may be performed by health care practitioners of various backgrounds with suitable training. The results suggest that FICBs are more effective for pain management than parenteral or oral opiates and sedative agents alone and can be used as an appropriate adjunct to pain management.

The efficacy of prehospital IV fluid management in severely injured adult trauma patients: a systematic review and meta-analysis.

PURPOSE: The most widely used prehospital strategy for the management of hemorrhagic shock or trauma accompanied by hypotension is fluid resuscitation. Though current guidelines suggest early and aggressive fluid resuscitation, contemporary literature suggests a more restrictive approach. Our objective was to evaluate the effectiveness of low/ no IV fluids in comparison to standard resuscitation in reducing mortality for trauma patients in the prehospital setting. METHODS: Population-adults with blunt or penetrating trauma in the prehospital setting with severe injury (defined as SBP < 90 mm Hg and/or a shock index > (1). Intervention-low-dose/no IV fluids. Comparison-standard resuscitation. Outcome-mortality. A librarian-assisted search of five databases (Medline, Embase, Web of Science, and CINAHL, Cochrane trials) was completed in June 2021 (updated in November 2022). ROBINS-1 and ROB-2 tools were used to assess risk of bias in observational and randomized studies, respectively. An inverse variance method and random-effects model of statistical analysis were utilized, with data reported as risk ratios with related 95% confidence intervals. Heterogeneity of studies was assessed through analysis of the I2 RESULTS: Seven studies (six observational and one randomized trial) were included, with three thousand and fifty study participants included for analysis. Four studies compared high- to low-dose fluids, and three compared fluids to no fluids. We found no difference in mortality when comparing standard resuscitation to restricted resuscitation (RR 0.99, 95% CI [0.80-1.22], I2 = 54%). CONCLUSION: Weak, primarily observational evidence suggests that standard fluid resuscitation has no significant mortality benefit over restricting/withholding IV fluids in severe/hypotensive trauma. This review adds evidence to questioning the requirement for IV fluids in trauma given the lack of mortality benefit, in addition to demonstrating the need for more randomized studies in this area.

RéSUMé: OBJECTIF: La stratégie préhospitalière la plus utilisée pour la prise en charge du choc hémorragique ou du traumatisme accompagné d'hypotension est la réanimation liquidienne. Bien que les directives actuelles suggèrent une réanimation liquidienne précoce et agressive, la littérature contemporaine suggère une approche plus restrictive. Notre objectif était d'évaluer l'efficacité des liquides intraveineux faibles ou inexistants par rapport à la réanimation standard pour réduire la mortalité des patients traumatisés en milieu préhospitalier. MéTHODES: Population - adultes ayant subi un traumatisme contondant ou pénétrant en milieu préhospitalier et présentant des lésions graves (définies par une PAS < 90 mm Hg et/ou un indice de choc > 1). Intervention - faible dose/absence de fluides IV. Comparaison - réanimation standard. Résultat - Mortalité. Une recherche assistée par un bibliothécaire dans 5 bases de données (Medline, Embase, Web of Science et CINAHL, essais Cochrane) a été effectuée en juin 2021 (mise à jour en novembre 2022). Les outils ROBINS-1 et ROB-2 ont été utilisés pour évaluer le risque de biais dans les études observationnelles et randomisées respectivement. Une méthode de variance inverse et un modèle d'analyse statistique à effets aléatoires ont été utilisés, les données étant présentées sous forme de rapports de risque avec les intervalles de confiance à 95 % correspondants. L'hétérogénéité des études a été évaluée par l'analyse de l'I2. RéSULTATS: Sept études (six études d'observation et un essai randomisé) ont été incluses, avec 3050 participants à l'analyse. Quatre études ont comparé des fluides à forte dose à des fluides à faible dose, et trois ont comparé des fluides à l'absence de fluides. Nous n'avons trouvé aucune différence dans la mortalité en comparant la réanimation standard à la réanimation restreinte (RR 0,99, IC à 95 % [0,80­1,22], I2 = 54 %). CONCLUSION: Des preuves faibles, essentiellement observationnelles, suggèrent que la réanimation liquidienne standard ne présente aucun avantage significatif en termes de mortalité par rapport à la restriction/rétention des liquides IV dans les cas de traumatismes graves/hypotensifs. Cette revue ajoute des preuves à la remise en question de la nécessité des fluides IV en traumatologie, étant donné l'absence de bénéfice en termes de mortalité, en plus de démontrer le besoin de plus d'études randomisées dans ce domaine.

Epidemiology, mortality and miss rate of acute aortic syndrome in Ontario, Canada: a population-based study.

INTRODUCTION: Acute aortic syndrome (AAS) is a life-threatening emergency. It describes three distinct diagnoses: acute aortic dissection, acute intramural hematoma and penetrating atherosclerotic ulcer. There are currently no accurate estimates for incidence, mortality or misdiagnosis. Our objectives were to determine the incidence, mortality and miss rate of acute aortic syndrome in the emergency department (ED). METHODS: A population-based retrospective cohort study of anonymously linked data for residents of Ontario, Canada, was carried out. Incident cases of acute aortic syndrome were identified between 2003 and 2018 using a validated algorithm based on ICD-10 codes and death. Incidence (number of cases/population of Ontario), mortality, and miss rate were calculated. Miss rate was defined as when a patient was seen in the ED within 14 days prior to an acute aortic syndrome diagnosis with a presenting complaint consistent with acute aortic syndrome. RESULTS: There were 1299 cases of acute aortic syndrome over the study period [age mean (SD) 68.03 ± 14.70; female (n = 500, 38.5%); rural areas (n = 111, 8.6%)]. The overall annual incidence for acute aortic syndrome was 0.61 per 100,000. One year mortality decreased from 47.4 to 29.1%. ED mortality was 14.9%. In the 14 days prior to diagnosis 12.5% of patients were seen in the ED with a presentation consistent with acute aortic syndrome. CONCLUSIONS: Annual incidence of acute aortic syndrome was found to be lower than other population-based studies. Also, the burden of mortality is seen in the ED. Education initiatives should focus on the identification of acute aortic syndrome in the ED to address mortality and miss rate.

RéSUMé: INTRODUCTION: Le syndrome aortique aigu (SAA) est une urgence qui met la vie en danger. Il décrit trois diagnostics distincts: dissection aortique aiguë, hématome intramural aigu et ulcère athéroscléreux pénétrant. Il n'existe actuellement aucune estimation précise de l'incidence, de la mortalité ou des diagnostics erronés. Nos objectifs étaient de déterminer l'incidence, la mortalité et le taux d'échec du syndrome aortique aigu dans le service des urgences (SU). MéTHODES: Une étude de cohorte rétrospective basée sur la population a été réalisée à partir de données liées anonymement pour les résidents de l'Ontario, Canada. Les cas incidents de syndrome aortique aigu ont été identifiés entre 2003-2018 à l'aide d'un algorithme validé basé sur les codes CIM-10 et les décès. L'incidence (nombre de cas/population de l'Ontario), la mortalité et le taux d'absence ont été calculés. Le taux d'omission a été défini comme le cas où un patient a été vu à l'urgence dans les 14 jours précédant un diagnostic de syndrome aortique aigu et que la plainte était conforme au syndrome aortique aigu. RéSULTATS: Il y a eu 1 299 cas de syndrome aortique aigu pendant la période d'étude (âge moyen (ET) 68,03 ±14,70 ; femmes (n = 500, 38,5 %) ; zones rurales (n = 111, 8,6%)). L'incidence annuelle globale du syndrome aortique aigu était de 0,61 pour 100 000. La mortalité à un an a diminué de 47,4 % à 29,1 %. La mortalité aux urgences était de 14,9 %. Au cours des 14 jours précédant le diagnostic, 12,5 % des patients ont été vus aux urgences avec une présentation compatible avec le syndrome aortique aigu. CONCLUSIONS: L'incidence annuelle de syndrome aortique aigu s'est avérée inférieure à celle d'autres études basées sur la population. En outre, le poids de la mortalité est observé aux urgences. Les initiatives de formation devraient se concentrer sur l'identification des syndrome aortique aigu aux urgences afin de réduire la mortalité et le taux d'échec.

Derivation and validation of a clinical decision rule to risk-stratify COVID-19 patients discharged from the emergency department: The CCEDRRN COVID discharge score.

Objective: To risk-stratify COVID-19 patients being considered for discharge from the emergency department (ED). Methods: We conducted an observational study to derive and validate a clinical decision rule to identify COVID-19 patients at risk for hospital admission or death within 72 hours of ED discharge. We used data from 49 sites in the Canadian COVID-19 Emergency Department Rapid Response Network (CCEDRRN) between March 1, 2020, and September 8, 2021. We randomly assigned hospitals to derivation or validation and prespecified clinical variables as candidate predictors. We used logistic regression to develop the score in a derivation cohort and examined its performance in predicting short-term adverse outcomes in a validation cohort. Results: Of 15,305 eligible patient visits, 535 (3.6%) experienced the outcome. The score included age, sex, pregnancy status, temperature, arrival mode, respiratory rate, and respiratory distress. The area under the curve was 0.70 (95% confidence interval [CI] 0.68-0.73) in derivation and 0.71 (95% CI 0.68-0.73) in combined derivation and validation cohorts. Among those with a score of 3 or less, the risk for the primary outcome was 1.9% or less, and the sensitivity of using 3 as a rule-out score was 89.3% (95% CI 82.7-94.0). Among those with a score of ≥9, the risk for the primary outcome was as high as 12.2% and the specificity of using 9 as a rule-in score was 95.6% (95% CI 94.9-96.2). Conclusion: The CCEDRRN COVID discharge score can identify patients at risk of short-term adverse outcomes after ED discharge with variables that are readily available on patient arrival.

Medical Text Simplification Using Reinforcement Learning (TESLEA): Deep Learning-Based Text Simplification Approach.

BACKGROUND: In most cases, the abstracts of articles in the medical domain are publicly available. Although these are accessible by everyone, they are hard to comprehend for a wider audience due to the complex medical vocabulary. Thus, simplifying these complex abstracts is essential to make medical research accessible to the general public. OBJECTIVE: This study aims to develop a deep learning-based text simplification (TS) approach that converts complex medical text into a simpler version while maintaining the quality of the generated text. METHODS: A TS approach using reinforcement learning and transformer-based language models was developed. Relevance reward, Flesch-Kincaid reward, and lexical simplicity reward were optimized to help simplify jargon-dense complex medical paragraphs to their simpler versions while retaining the quality of the text. The model was trained using 3568 complex-simple medical paragraphs and evaluated on 480 paragraphs via the help of automated metrics and human annotation. RESULTS: The proposed method outperformed previous baselines on Flesch-Kincaid scores (11.84) and achieved comparable performance with other baselines when measured using ROUGE-1 (0.39), ROUGE-2 (0.11), and SARI scores (0.40). Manual evaluation showed that percentage agreement between human annotators was more than 70% when factors such as fluency, coherence, and adequacy were considered. CONCLUSIONS: A unique medical TS approach is successfully developed that leverages reinforcement learning and accurately simplifies complex medical paragraphs, thereby increasing their readability. The proposed TS approach can be applied to automatically generate simplified text for complex medical text data, which would enhance the accessibility of biomedical research to a wider audience.

The learning impact of a virtual CPR webinar for seniors.

Aim: To assess the learning impact of a virtual interactive CPR webinar for seniors through mix-methods quantitative and qualitative survey analysis. Methods: We surveyed 350 webinar attendees. The webinar trained participants in hands-only CPR technique and AED use. Survey questions included multiple-choice selection and open-ended responses. Qualitative inductive thematic analysis was conducted on open-ended question responses. Knowledge of CPR was measured on a 3-point scale (very little knowledge, some knowledge, a lot of knowledge). Proportions were compared pre and post seminar using a z-test. Results: 231 respondents ≥ 65 years participated in the survey (response rate 66.0 %). There was a significant increase in self-reported knowledge of CPR pre and post webinar (very little knowledge 33.9 % to 1.8 % P < 0.00001, some knowledge 54.2 % to 12.1 % P < 0.0001, a lot of knowledge 11.9 % to 86.1 % P < 0.0001). We found 5 main themes on participant feedback: Positive affective comments, learning, constructive criticism, the desire to share information and comments on CPR ability. We identified 4 main themes related to further questions: Performing CPR in different circumstances, risks of CPR, information sharing, and prevention of death from myocardial infarction. Following the webinar, 89.9 % of respondents chose that they would be very likely to perform CPR on a friend, family member or colleague. Conclusion: This study highlights the success of virtual CPR webinars for senior citizens in improving self-reported CPR knowledge. This has potential to address barriers to online education for seniors and increase bystander CPR rates.

Outpatient parenteral antibiotic therapy (OPAT) and inpatient treatment strategies for emergency department patients with cellulitis: a cost analysis.

OBJECTIVES: Emergency department (ED) patients with cellulitis requiring intravenous antibiotics may be treated via outpatient parenteral antibiotic therapy (OPAT) as opposed to hospitalization. The primary objective was to compare healthcare costs for the following strategies: community intravenous antibiotics with referral to an OPAT clinic operated by infectious disease specialists ('OPAT clinic' strategy); community intravenous antibiotics with return to ED if necessary ('return to ED' strategy); and hospital admission. METHODS: Using a hospital administrative database, we conducted a cost analysis using patient-level data of adult cellulitis patients presenting to two tertiary care EDs and were treated with intravenous antibiotics in one of three ways: OPAT clinic strategy; return to ED strategy; and hospital admission. Costs were estimated from Canada's publicly funded health system perspective. The primary outcome was the mean total cost (2015 CAD) per patient for each treatment strategy. A generalized linear model was performed to adjust for baseline characteristics, including age, sex and comorbidities. RESULTS: A total of 808 patients met inclusion criteria: OPAT clinic strategy (N = 341); return to ED strategy (N = 228) and hospital admission (N = 239). The mean total cost of care for the treatment strategies were: OPAT clinic: $2170 (95% CI $1905-$2436); return to ED: $1493 (95 %CI $1264-$1722); and hospital admission: $10,145 (95% CI $8668-$11,622). Results from the regression analysis suggested that the OPAT clinic strategy was associated with a cost-saving of $7394 (95% CI $6154-$8633, p < 0.001) compared to hospital admission and an increased cost of $651 (95% CI $367-$935, p < 0.001) when compared to the return to ED approach. CONCLUSIONS: This is the first Canadian study that compares the cost of different OPAT strategies for cellulitis patients. While both OPAT strategies are safe and far less costly than hospital admission, our findings suggest that a dedicated OPAT clinic for patients with cellulitis is more expensive than the return to ED strategy.

RéSUMé: OBJECTIFS: Les patients des services d'urgence atteints de cellulite nécessitant des antibiotiques intraveineux peuvent être traités par une antibiothérapie parentérale ambulatoire (OPAT) plutôt que par une hospitalisation. L'objectif principal était de comparer les coûts des soins de santé pour les stratégies suivantes : antibiotiques intraveineux communautaires avec orientation vers une clinique OPAT gérée par des spécialistes des maladies infectieuses (stratégie "clinique OPAT") ; antibiotiques intraveineux communautaires avec retour aux urgences si nécessaire (stratégie de "retour aux urgences") ; et admission à l'hôpital. MéTHODES: À l'aide d'une base de données administratives hospitalières, nous avons effectué une analyse des coûts en utilisant les données relatives aux patients adultes atteints de cellulite se présentant à deux urgences de soins tertiaires et traités par antibiotiques intraveineux de l'une des trois manières suivantes : Stratégie de la clinique OPAT ; stratégie de retour aux urgences; et admission à l'hôpital. Les coûts ont été estimés du point de vue du système de santé public du Canada. Le principal résultat était le coût total moyen (2015 CAD) par patient pour chaque stratégie de traitement. Un modèle linéaire généralisé a été réalisé pour ajuster les caractéristiques de base, y compris l'âge, le sexe et les comorbidités. RéSULTATS : Au total, 808 patients répondaient aux critères d'inclusion : stratégie clinique OPAT (N = 341) ; stratégie de retour aux urgences (N = 228) et admission à l'hôpital (N = 239). Le coût total moyen des soins pour les stratégies de traitement était le suivant : Clinique OPAT: 2 170 $ (IC 95 %: 1 905 $­2 436 $) ; retour aux urgences : 1 493 $ (IC à 95 %: 1 264 $­1 722 $) ; et hospitalisation : 10 145 $ (IC à 95 %: 8 668 $­11 622 $). Les résultats de l'analyse de régression suggèrent que la stratégie de la clinique OPAT est associée à une économie de 7 394 $ (IC à 95 %: 6 154 $­8 633 $, p < 0,001) par rapport à l'admission à l'hôpital et à une augmentation des coûts de 651 $ (IC à 95 %: 367 $­935 $, p < 0,001) par rapport à l'approche du retour aux urgences. CONCLUSIONS : Il s'agit de la première étude canadienne qui compare le coût de différentes stratégies d'OPAT pour les patients atteints de cellulite. Si les deux stratégies OPAT sont sûres et bien moins coûteuses que l'admission à l'hôpital, nos résultats suggèrent qu'une clinique OPAT dédiée aux patients atteints de cellulite est plus coûteuse que la stratégie de retour aux urgences.

Barriers and facilitators to nursing delirium screening in older emergency patients: a qualitative study using the theoretical domains framework.

BACKGROUND: delirium is common in older emergency department (ED) patients, but vastly under-recognised, in part due to lack of standardised screening processes. Understanding local context and barriers to delirium screening are integral for successful implementation of a delirium screening protocol. OBJECTIVES: we sought to identify barriers and facilitators to delirium screening by nurses in older ED patients. METHODS: we conducted 15 semi-structured, face-to-face interviews based on the Theoretical Domains Framework with bedside nurses, nurse educators and managers at two academic EDs in 2017. Two research assistants independently coded transcripts. Relevant domains and themes were identified. RESULTS: a total of 717 utterances were coded into 14 domains. Three dominant themes emerged: (i) lack of clinical prioritisation because of competing demands, lack of time and heavy workload; (ii) discordance between perceived capabilities and knowledge and (iii) hospital culture. CONCLUSION: this qualitative study explored nursing barriers and facilitators to delirium screening in older ED patients. We found that delirium was recognised as an important clinical problem; however, it was not clinically prioritised; there was a false self-perception of knowledge and ability to recognise delirium and hospital culture was a strong influencer of behaviour. Successful adoption of a delirium screening protocol will only be realised if these issues are addressed.