bluuebunny/crossref_metadata_2025 huggingface dataset:
Impact of a prison triage system on injuries seen in emergency departments
Authors: Kuzak Nick , O’Connor Michael , Pickett William , O’Brien Terry , Reid Ken , Pearson Mary
Published: July 2016

Objectives:

1) To describe injuries experienced by the male prisoner population in the Kingston, Ontario area, and to compare them with those observed in the general population; and 2) to compare the incidence and patterns of prisoner injuries seen in emergency departments (EDs) before and after the introduction of a prison injury triage system.

Design:

A chart review.

Setting:

The catchment area surrounding 2 hospital-based EDs in Kingston, Ontario, which includes 8 federal and provincial prisons for adult males.

Observations:

Injuries to male prisoners (ages 18–75 years) who were treated in the ED during 1996–98 were compared with injuries to the general male population of the same age range. An on-site emergency care triage system was introduced to area prisons in 1993. Prisoner injuries seen in the ED during 1996–98 were compared with those seen during a similar period prior to the introduction of the triage system (1981–84). Available comparators included patient demographics, disposition, intent and nature of injury, the need for surgery, and lengths of hospital stay.

Results:

148 prisoner injuries were identified for 1996–98. Prisoner injuries seen in the ED were relatively severe when compared with the general male population, as indicated by the higher frequency of fractures (31.8% prisoner vs. 13.4% general, p < 0.001), blunt head injuries (10.1% vs. 2.2%, p < 0.001), hospital admissions (42.6% vs. 4.1%, p < 0.001) and deaths (2.7% vs. 0.6%, p < 0.001). Since the introduction of the triage system there has been a reduction in the rate of prisoner injuries seen in local hospital EDs (6.1/100/yr [before] vs. 1.6/100/yr [after], p < 0.001). There has been an increase in the relative severity of prisoner injuries seen in the EDs as indicated by the increased hospital admission rate (42.6% vs. 22.7%, p < 0.001), increased rate of surgical intervention (27.7% vs. 12.1%, p < 0.001), and increased length of hospital stay (4.0 days vs. 2.1 days, p < 0.05). The mortality rate has remained low and unchanged (0.7% vs. 1.1%, p = 0.99).

Conclusions:

The introduction of the new triage system appeared to be associated with a decrease in the total number of ED visits by prisoners. The relative acuity of prisoner injuries seen in the EDs appeared to increase following introduction of the triage system.
Emergency medicine: A practice prone to error?
Authors: Croskerry Pat , Sinclair Douglas
Published: July 2016

The last decade has witnessed a rapidly growing public and academic interest in medical error, an interest that has culminated in the emergence of the science of error prevention in health care. The impact of this new science will be felt in all areas of medicine but perhaps especially in emergency medicine (EM). The emergency department’s unique operating characteristics make it a natural laboratory for the study of error. These characteristics, combined with the complex and myriad activities of EM, predict vulnerability to a multitude of errors. Overcrowding and other resource limitations impair continuous quality improvement, and many errors result from high decision density, excessive cognitive load and flawed thinking in the decision-making process. A large proportion of these errors have serious outcomes but an even higher proportion are preventable.

The historical practice of blaming individuals for errors needs to be replaced by root-cause analysis that identifies process and systemic weaknesses. Quantitative and qualitative methods are needed to detect, describe and classify error at all levels in the system. Research is needed into the processes that underlie EM error. Educational initiatives should be developed at all levels, for everyone from undergraduate trainees to practicing emergency physicians. Changes in societal attitudes will be an important component of the new culture of patient safety.

A nationwide reporting system is proposed to disseminate error information expediently. Canadian EM providers are in a pivotal position to provide leadership to the Canadian health care system in this important area.
Can peripheral venous blood gases replace arterial blood gases in emergency department patients?
Authors: Rang Louise C.F. , Murray Heather E. , Wells George A. , MacGougan Cameron K.
Published: July 2016

Objective:

To determine if peripheral venous blood gas values for pH, partial pressure of carbon dioxide (PCO2) and the resultant calculated bicarbonate (HCO3) predict arterial values accurately enough to replace them in a clinical setting.

Methods:

This prospective observational study was performed in a university tertiary care emergency department from June to December 1998. Patients requiring arterial blood gas analysis were enrolled and underwent simultaneous venous blood gas sampling. The following data were prospectively recorded: age, sex, presenting complaint, vital signs, oxygen saturation, sample times, number of attempts and indication for testing. Correlation coefficients and mean differences with 95% confidence intervals (CIs) were calculated for pH,PCO2and HCO3. A survey of 45 academic emergency physicians was performed to determine the minimal clinically important difference for each variable.

Results:

The 218 subjects ranged in age from 15 to 90 (mean 60.4) years. The 2 blood samples were drawn within 10 minutes of each other for 205 (96%) of the 214 patients for whom data on timing were available. Pearson’s product–moment correlation coefficients between arterial and venous values were as follows: pH, 0.913;PCO2, 0.921; and HCO3, 0.953. The mean differences (and 95% CIs) between arterial and venous samples were as follows: pH, 0.036 (0.030–0.042);PCO2, 6.0 (5.0–7.0) mm Hg; and HCO3, 1.5 (1.3–1.7) mEq/L. The mean differences (± 2 standard deviations) were greater than the minimum clinically important differences identified in the survey.

Conclusions:

Arterial and venous blood gas samples were strongly correlated, and there were only small differences between them. A survey of emergency physicians suggested that the differences are too large to allow for interchangeability of results; however, venous values may be valid if used in conjunction with a correction factor or for trending purposes.
Inter-observer agreement using the Canadian Emergency Department Triage and Acuity Scale
Authors: Manos Daria , Petrie David A. , Beveridge Robert C. , Walter Stephen , Ducharme James
Published: July 2016

Objective:

To determine the inter-observer agreement on triage assignment by first-time users with diverse training and background using the Canadian Emergency Department Triage and Acuity Scale (CTAS).

Methods:

Twenty emergency care providers (5 physicians, 5 nurses, 5 Basic Life Support paramedics and 5 Advanced Life Support paramedics) at a large urban teaching hospital participated in the study. Observers used the 5-level CTAS to independently assign triage levels for 42 case scenarios abstracted from actual emergency department patient presentations. Case scenarios consisted of vital signs, mode of arrival, presenting complaint and verbatim triage nursing notes. Participants were not given any specific training on the scale, although a detailed one-page summary was included with each questionnaire. Kappa values with quadratic weights were used to measure agreement for the study group as a whole and for each profession.

Results:

For the 41 case scenarios analyzed, the overall agreement was significant (quadratic-weighted κ = 0.77, 95% confidence interval, 0.76–0.78). For all observers, modal agreement within one triage level was 94.9%. Exact modal agreement was 63.4%. Agreement varied by triage level and was highest for Level I (most urgent). A reasonably high level of intra- and inter-professional agreement was also seen.

Conclusions:

Despite minimal experience with the CTAS, inter-observer agreement among emergency care providers with different backgrounds was significant.
Lateral canthotomy and cantholysis: a simple, vision-saving procedure
Authors: McInnes Gord , Howes Daniel W.
Published: July 2016

Lateral canthotomy and cantholysis is a simple procedure that can be performed by emergency physicians. It has the potential to save vision, particularly in cases of blunt ocular trauma. The case of a 37-year-old man with blunt ocular trauma, a retrobulbar hemorrhage and rapidly increasing orbital pressure requiring an urgent lateral canthotomy and cantholysis is presented. Pathophysiology, indications, contraindications, procedure and follow-up care are described.
9/11 New York City: Canadians lend a hand
Authors: Travers Andrew , Irwin Kathryn , Anton Andy , Christenson Jim
Published: July 2016

SOMMAIRE

Le 11 septembre 2001, les auteurs participaient à une rencontre sur des essais cliniques à New York. De concert avec leurs collègues chercheurs, ils ont participé à l’opération de sauvetage pendant les 16 premières heures suivant le pire acte de terrorisme de l’histoire moderne. Le présent article résume leur expérience.
Can body temperature be maintained during aeromedical transport?
Authors: Sookram Sunil M. , Barker Samantha , Kelly Karen D. , Patton William , Sosnowski Terry , Neilson Kevin , Rowe Brian H.
Published: July 2016

Background:

Aeromedical transport in northern areas may be associated with hypothermia. The objective of this study was to determine whether significant hypothermia (core temperature <35ºC) occurs in severely injured or ill intubated patients during transport by rotary wing aircraft.

Methods:

In this prospective cohort study, all intubated patients over 16 years of age who were transported by rotary wing aircraft from rural hospitals or trauma scenes in northern Alberta to regional hospitals in Edmonton were eligible for study. Esophageal thermometers were used to measure core temperature at 10-minute intervals during transport.

Results:

Of 133 potentially eligible patients, 116 were enrolled; 69 (59%) had esophageal thermometers inserted, and 47 (41%) had other temperature measurements. Severe hypothermia occurred in only 1% to 2% of cases, but 28% to 39% of patients met criteria for mild hypothermia prior to transport. Core temperatures did not fall during transport, despite the fact that warming techniques were documented in only 38% of cases.

Conclusions:

During brief (<225 km) rotary wing aeromedical transport of severely injured or ill patients, significant hypothermia is uncommon and body temperature is generally well maintained with the use of simple passive measures. These findings do not justify recommendations for more aggressive core temperature monitoring during this type of aeromedical transport.
A review of etomidate for rapid sequence intubation in the emergency department
Authors: Yeung Janice K. , Zed Peter J.
Published: July 2016

Etomidate is a sedative–hypnotic chemically unrelated to other induction agents. The pharmacological and safety profile of etomidate offers many advantages for induction during rapid sequence intubation (RSI) in the emergency department (ED). Its onset of action is within 5 to 15 seconds, and its duration of action is 5 to 15 minutes. Unlike thiopental, propofol, midazolam and, to a lesser extent, ketamine, etomidate has minimal respiratory or cardiovascular effects and can be safely used in patients with hemodynamic instability or cardiac ischemia. Etomidate is cerebroprotective, with the ability to decrease intracranial pressure and maintain cerebral perfusion, making it an ideal agent for patients with head injuries. Of the currently available induction agents, etomidate offers the most favourable safety profile and is the least likely to produce adverse effects in patients with unknown or untreated medical conditions. Etomidate may cause pain on injection, myoclonic movements on induction, hiccups, nausea and vomiting. Transient adrenal suppression has been reported, but not to a clinically significant degree, after single induction doses for ED RSI. Etomidate has been well studied in the ED and should be adopted for RSI in specific ED patient groups.
Fomepizole in the treatment of ethylene glycol poisoning
Authors: Hall Tammy L.
Published: July 2016

The management of ethylene glycol poisoning is reviewed, with a focus on the use of the new antidote fomepizole. Ethylene glycol is a widely used industrial agent that is also easily obtained commercially, usually as radiator antifreeze. Ingestion of as little as 30 to 60 mL can result in death or serious permanent disability. Traditional management of poisoning includes the use of ethanol, with or without hemodialysis. Activated charcoal is not indicated, and gastric lavage may be beneficial only in the first hour after ingestion. Cofactors such as pyridoxine and thiamine may be beneficial in patients deficient in these vitamins. A new antidote, fomepizole, has recently been approved for use in Canada. Like ethanol, it is a competitive inhibitor of alcohol dehydrogenase. Potential benefits of fomepizole include its ease of administration and lack of serious adverse effects. Fomepizole may be recommended over ethanol in situations in which avoidance of ethanol-induced side effects is imperative or when ethanol is not readily available. Further studies are required to verify its comparative efficacy and cost-effectiveness compared to ethanol.
Analysis of factors influencing length of stay in the emergency department
Authors: Yoon Philip , Steiner Ivan , Reinhardt Gilles
Published: July 2016

Objectives:

Length of stay (LOS) is a key measure of emergency department (ED) throughput and a marker of overcrowding. Time studies that assess key ED processes will help clarify the causes of patient care delays and prolonged LOS. The objectives of this study were to identify and quantify the principal ED patient care time intervals, and to measure the impact of important service processes (laboratory testing, imaging and consultation) on LOS for patients in different triage levels.

Methods:

In this retrospective review, conducted at a large urban tertiary care teaching hospital and trauma centre, investigators reviewed the records of 1047 consecutive patients treated during a continuous 7-day period in January 1999. Key data were recorded, including patient characteristics, ED process times, tests performed, consultations and overall ED LOS. Of the 1047 patient records, 153 (14.6%) were excluded from detailed analysis because of incomplete documentation. Process times were determined and stratified by triage level, using theCanadian Emergency Department Triage and Acuity Scale(CTAS). Multiple linear regression analysis was performed to determine which factors were most strongly associated with prolonged LOS.

Results:

Patients in intermediate triage Levels III and IV generally had the longest waiting times to nurse and physician assessment, and the longest ED lengths of stay. CTAS triage levels predicted laboratory and imaging utilization as well as consultation rate. The use of diagnostic imaging and laboratory tests was associated with longer LOS, varying with the specific tests ordered. Specialty consultation was also associated with prolonged LOS, and this effect was highly variable depending on the service consulted.

Conclusions:

Triage level, investigations and consultations are important independent variables that influence ED LOS. Future research is necessary to determine how these and other factors can be incorporated into a model for predicting LOS. Improved information systems will facilitate similar ED time studies to assess key processes, lengths of stay and clinical efficiency.
Dexamethasone prevents relapse after emergency department treatment of acute migraine: a randomized clinical trial
Authors: Innes Grant D. , Macphail Iain , Dillon Edward C. , Metcalfe Cathy , Gao Min
Published: July 2016

Objective:

To determine whether the addition of intravenous dexamethasone to standard emergency department (ED) migraine therapy would decrease the incidence of severe recurrent headache 24 to 48 hours after initial treatment.

Methods:

Patients aged 19 to 65 years whose headache was severe enough to require parenteral therapy and who met International Headache Society migraine criteria were eligible for this randomized, double-blind trial. The study was conducted in the ED of 2 community hospitals, 1 of which was a tertiary referral centre. Exclusion criteria included pregnancy, focal findings, fever, meningismus, allergy to the study drug, active peptic ulcer disease and diabetes mellitus. Demographic and clinical data, including headache severity, were recorded. After abortive therapy (antiemetics, intravenous nonsteroidal agents, dihydroergotamine or opioids), blinded nurses administered dexamethasone (24 mg intravenously) or placebo. Patients recorded headache severity on a Visual Analogue Scale (VAS) at time T = 0, T = 30 minutes and T = 60 minutes and at discharge. They were contacted 48 to 72 hours later and asked whether they had suffered a recurrence of their headache, categorized as class A (severe, provoking another physician visit), class B (severe, interfering with daily activity but not provoking a physician visit), class C (mild, requiring self-medication but not limiting activity) or class D (mild, requiring no treatment). Results: Two of 100 patients were lost to follow-up, leaving 98 in the study sample. Placebo recipients were more likely to be female; other baseline characteristics were similar between groups. Median VAS pain score was 83 mm on ED arrival, 35 mm after initial treatment and 12 mm on discharge. At follow-up, 65 of 98 patients had suffered headache recurrence. In the placebo versus dexamethasone groups, respectively, the results were 11 versus 0 in class A, 11 versus 9 in class B, 7 versus 11 in class C and 4 versus 12 in class D. Regarding the primary outcome, 9 of 49 dexamethasone patients (18%) and 22 of 49 placebo patients (45%) had severe (classes A and B) recurrent headache (odds ratio 0.28; 95% CI, 0.11 to 0.69;p= 0 .005).

Conclusions:

Migraine recurrence is common after “successful” ED treatment. Inflammation may be a critical factor in migraine genesis. Intravenous dexamethasone decreases the incidence of severe recurrent headache after ED treatment and should be offered to patients thought to be at risk of recurrent headache.
Taking time to talk to the roses
Authors: Moser Meite
Published: July 2016

I love my job. I truly enjoy going to work and being part of the controlled pandemonium. The IVDA in 12 that was given Narcan by EHS and arrived awake enough to grab his full syringe and start injecting again. The sound of swear words wafting through the department and the sights and smells of human waste products exuding through all body orifices. Sometimes it is overwhelming: the noise, the demands, and the sadness of the conditions that people end up in.
Answer
Authors: Hollohan Kirk
Published: July 2016

The most likely answer in this case is D, but the correct answer is B. Because of diagnostic uncertainty, this man underwent urgent cardiac catheterization. Angiography revealed 80% occlusion of the left main coronary artery resulting from the false lumen created by an ascending aortic dissection. An immediate transesophageal echocardiogram showed mild aortic insufficiency, a left ventricular ejection fraction of 40%, and diffuse anterior hypokinesis. The patient underwent emergency surgery to repair both aortic dissection and the aortic valve, and to perform bypass grafting to the left main coronary artery.
Development, implementation and reliability assessment of an emergency physician performance evaluation tool
Authors: Etherington Jeremy , Innes Grant , Christenson James , Berkowitz Jonathan , Chamberlain Robert , Berringer Ross , Leung Cosmas
Published: July 2016

Evaluation of physician practice is necessary, both to provide feedback for self-improvement and to guide department heads during yearly evaluations.

Objective:

To develop and implement a peer-based performance evaluation tool and to measure reliability and physician satisfaction.

Methods:

Each emergency physician in an urban emergency department evaluated their peers by completing a survey consisting of 21 questions on effectiveness in 4 categories: clinical practice, interaction with coworkers and the public, nonclinical departmental responsibilities, and academic activities. A sample of emergency nurses evaluated each emergency physician on a subset of 5 of the questions. Factor analysis was used to assess the reliability of the questions and categories. Intra-class correlation coefficients were calculated to determine inter-rater reliability. After receiving their peer evaluations, each physician rated the process’s usefulness to the individual and the department.

Results:

225 surveys were completed on 16 physicians. Factor analysis did not distinguish the nonclinical and academic categories as distinct; therefore, the survey questions fell into 3 domains, rather than the 4 hypothesized. The overall intra-class correlation coefficient was 0.43 for emergency physicians, indicating moderate, but far from perfect, agreement. This suggests that variability exists between physician evaluators, and that multiple reviewers are probably required to provide a balanced physician evaluation. The intra-class correlation coefficient for emergency nurses was 0.11, suggesting poor reliability. Overall, 11 of 15 physicians reported the process valuable or mostly valuable, 3 of 15 were unsure and 1 of 15 reported that the process was definitely not valuable.

Conclusion:

Physician evaluation by a single individual is probably unreliable. A useful physician peer evaluation tool can be developed. Most physicians view a personalized, broad-based, confidential peer review as valuable.
Ruralizing the Canadian Triage and Acuity Scale
Authors: Thompson James M. , Dodd Graham
Published: July 2016

SOMMAIRE:

L’échelle canadienne de triage et de gravité (ÉTG) a été introduite dans les années 90 et est rapidement en voie de devenir la norme canadienne de triage. Mais depuis 1997, moment où l’Institut canadien d’information sur la santé a commencé à promouvoir l’ÉTG, certains médecins de campagne ont manifesté leurs préoccupations, signalant l’existence de d’autres systèmes de triage et mettant en doute l’efficacité de l’ÉTG dans les milieux ruraux.

Les médecins des milieux ruraux soulèvent divers points: une perception de la complexité de l’ÉTG, un délai de réponse apparemment court pour l’évaluation par le médecin (et les ramifications médico-légales de la définition de ces délais), et une validation inadéquate de l’ÉTG dans les milieux ruraux. Le présent article explore l’historique de cette controverse et ébauche des solutions possibles. Les auteurs concluent que l’ÉTG est un outil malléable qui peut être «adapté» aux milieux ruraux et qu’il permettra par la suite d’améliorer les soins aux patients et les conditions de travail des infirmières et des médecins de ces milieux.
Survey of pain etiology, management practices and patient satisfaction in two urban emergency departments
Authors: Todd Knox H. , Sloan Edward P. , Chen Connie , Eder Stephen , Wamstad Kyle
Published: July 2016

Objective:

The underuse of analgesics, or “oligoanalgesia,” is common in emergency departments (EDs). To improve care we must understand our patients’ pain experiences as well as our clinical practice patterns. To this end, we examined pain etiology, pain management practices and patient satisfaction in 2 urban EDs.

Methods:

We conducted a cross-sectional study using structured interviews and chart reviews for patients with pain who presented to either of 2 university-affiliated EDs. We assessed pain etiologies, patient pain experiences, pain management practices, and patient satisfaction with pain management.

Results:

The 525 study subjects reported high pain intensity levels on presentation, with a median rating of 8 on a 10-point numerical rating scale (NRS). At discharge, pain severity had decreased to a median rating of 4; however, 48% of patients were discharged from the ED in moderate to severe pain (NRS 5–10). Subjects reported spending 57% of their ED stay in moderate to severe pain. Analgesics were administered to only 50% of patients. The mean time to analgesic administration was almost 2 hours. Despite high levels of reported pain at discharge and low rates of analgesic administration, subjects reported high satisfaction with pain management.

Conclusions:

In the 2 EDs studied, we found high levels of pain severity for our patients, as well as low levels of analgesic use. When used, analgesic administration was often delayed. Despite these findings, patient satisfaction remained high. Despite recent efforts to improve pain management practice; oligoanalgesia remains a problem for our specialty.
Major injury associated with all-terrain vehicle use in Nova Scotia: a 5-year review
Authors: Sibley Aaron K. , Tallon John M.
Published: July 2016

Background:

Riding all-terrain vehicles (ATVs) is a popular recreational activity, with approximately 1.5 million users in Canada. Despite legislation aimed at reducing injury rates, ATV-related incidents remain a major cause of trauma and death. This paper reviews the epidemiology of major injury associated with ATV use in Nova Scotia.

Methods:

The Nova Scotia Trauma Registry was used to identify all adults over age 15 who sustained major ATV-related trauma (Injury Severity Score [ISS] ≥12) within a 5-year period. Demographic variables, temporal statistics, alcohol use, helmet use, injury characteristics and injury outcome variables, including ISS, length of stay (LOS), Glasgow Coma Scale score and discharge status were evaluated.

Results:

Twenty-five patients met the inclusion criteria. Most (92%) were males, and 64% were between 16 and 34 years of age. Most injuries occurred between 1300 hrs and 1900 hrs, 52% occurred on the weekend, and 40% occurred in the spring. The average ISS was 22.1, and injuries to the central nervous system comprised 39% of all major injuries. Alcohol was involved in up to 56% of all incidents, and only 4 patients (16%) were known to be wearing a helmet at the time of injury. Average hospital LOS was 21.6 days.

Interpretation:

ATV-related incidents are a continuing source of major injury. This paper describes the epidemiology of ATV-related major trauma presenting to the sole tertiary care referral centre in one province. Information gained from this study should be used to influence ATV public education programs.
Hydrofluoric acid burn: a case report
Authors: Qureshi Roohi , House Ronald , Uhlig Eric , Genesove Leon , Holness D. Linn
Published: July 2016

A case of occupational hydrofluoric acid exposure is presented, accentuating the importance of eliciting an occupational history during the initial emergency department evaluation. Patients who present with major hydrofluoric acid burns are at risk for systemic complications, including potentially fatal hypocalcemia. Information regarding the accident and workplace circumstances may well allow the physician to anticipate the exposed patient’s course. These patients should be considered occupational index cases that will require follow up by government occupational health services. Identification of potential hazards, risk assessment and enforcement of recommendations for change (such as engineering controls, personal protective equipment, education) may be key to preventing similar injuries in the future.
Dr. Mom and Dr. Dad — Issues in becoming a parent during residency
Authors: Lund Adam
Published: July 2016

Most people who have been through a residency program would agree that there are times that one’s personal resources are taxed. Those who have a “significant other” undoubtedly experience a mixed blessing. Having a partner to share your life provides great emotional support and good times. However, meeting your commitment to a partner can be challenged by severely limited uncommitted time, chronic sleep deprivation and concurrent responsibility to read, prepare presentations, moonlight, etc. Many marriages fail during the residency-training period due to the inability of couples to resolve these conflicts. So, what happens when you introduce children into this situation? How does pregnancy and the subsequent parenting role affect couples when they are pursuing residency training?
Diagnostic parameters of CK–MB and myoglobin related to chest pain duration
Authors: Innes Grant , Christenson James , Weaver W. Douglas , Liu Tiepu , Hoekstra James , Every Nathan , Jackson Raymond E. , Frederick Paul , Gibler W. Brian
Published: July 2016

Objective:

Cardiac marker sensitivity depends on chest pain duration at the time of sampling. Our objective was to estimate the sensitivity, specificity, and likelihood ratios of early CK–MB and myoglobin assays in patients presenting to the emergency department (ED) with nondiagnostic ECGs, stratified by the duration of ongoing chest pain at the time of ED assessment.

Methods:

This was a prospective observational study carried out in 10 US and 2 Canadian EDs. Patients >25 years of age with ongoing chest pain and nondiagnostic ECGs were stratified by pain duration (0–4 h, 4–8 h, 8–12 h, >12 h). CK–MB and myoglobin assays were drawn at T = 0 (ED assessment) and T = 1 hr. Patients were followed for 7–14 days to identify all cases of acute myocardial infarction (AMI). ED test results were correlated with patient outcomes.

Results:

Of 5005 eligible patients, 565 had AMI. Pain duration was 0–4 h in 3014 patients, 4–8 h in 961, 8–12 h in 487, and >12 h in 543. Marker sensitivity increased with pain duration, ranging from 28%–77% for CK–MB and 39%–73% for myoglobin. The maximal sensitivity achieved by a T = 0 assay was 73%, and this was in patients with 8–12 or >12 h of ongoing pain. No combination of tests achieved 90% sensitivity in any pain duration strata.

Conclusions:

Regardless of chest pain duration, single assays and early serial markers (0+1 hr) do not rule out AMI; therefore, serial assays over longer observation periods are required. Likelihood ratios derived in this study will help physicians who use Bayesian analysis to determine post-test AMI likelihood in patients with chest pain.
Diagnostic test utilization in the emergency department for alert headache patients with possible subarachnoid hemorrhage
Authors: Perry Jeffrey J. , Stiell Ian , Wells George , Spacek Alena
Published: July 2016

Objectives:

This study evaluated the incidence of subarachnoid hemorrhage (SAH) and the use of computed tomography (CT) and lumbar puncture (LP) in a cohort of emergency department (ED) patients with acute headache.

Methods:

Health records from a tertiary care ED were used to identify all patients over 15 years of age who presented with headache over a 10-month period. Patients were excluded if they had been referred with confirmed SAH or if they had recurrent headache, head trauma, decreased level of consciousness or new neurologic deficits. Outcome measures included ED diagnosis, use of CT or LP, and ED length of stay. Analysis included descriptive statistics, 95% confidence intervals (CIs) and analysis of variance for length of stay.

Results:

The mean age of the 891 patients was 41.9 years. Ten (1.1%) of the patients had SAH, 313 (35.1%) underwent CT, and 85 (9.5%) underwent LP. Only 9 (2.9%) of the CT scans and 2 (2.4%) of the LPs were positive for SAH. Of the 296 patients with normal CT results, 232 (78.4%) did not undergo subsequent LP. The mean length of stay was 4.0 hours (95% CI, 3.8–4.1) if no diagnostic testing was performed, 5.0 hours (95% CI, 4.7–5.4) if CT was performed and 7.1 hours (95% CI, 6.3–7.9) if LP was performed (p = 0.001).

Conclusions:

Diagnostic testing was associated with substantially prolonged lengths of stay. CT and LP had low diagnostic yields, which suggests the need for a clinical decision rule to rule out SAH in ED patients with acute headache.
Pulse oximetry in discharge decision-making: a survey of emergency physicians
Authors: Brown Lance , Dannenberg Bernard
Published: July 2016

Objectives:

Our primary objective was to describe the pulse oximetry discharge thresholds used by general and pediatric emergency physicians for well-appearing children with bronchiolitis and pneumonia, and to assess the related practice variability.

Methods:

This mail-in survey was conducted in August and September 2001 and included the 281 active members of the Pediatric Emergency Medicine Section of the American College of Emergency Physicians. The survey consisted of 2 case scenarios of previously healthy, well-appearing children: a 2-year-old with pneumonia and a 10-month-old with bronchiolitis. Respondents were asked about their years of experience, teaching load, percentage of children in their practice, whether they currently have a written departmental guideline at their institution, and the lowest pulse oximetry reading that they would accept and still discharge the patient directly home.

Results:

One hundred and eighty-two (65%) physicians answered the survey and met the inclusion criteria. The respondents’ median oximetry value and interquartile range (IQR) for the pneumonia and bronchiolitis cases were 93% (92%–94%) and 94% (92%–94%) respectively. With the exception of the 3 physicians practising >1000 metres above sea level, the responses by subgroups were similar.

Conclusions:

There does not yet exist a safe, clinically validated pulse oximetry discharge threshold. Emergency physicians from this study sample have a modest degree of practice variability in a self-reported pulse oximetry discharge threshold. Emergency physicians may use this data to compare their own practice with that reported by this group.
Understanding the causes of overcrowding in emergency departments in the Capital Health Region in Alberta: a focus group study
Authors: Estey Angela , Ness Kathleen , Saunders L. Duncan , Alibhai Arif , Bear Robert A.
Published: July 2016

Objectives:

To determine the perceptions of health care professionals and service providers with regard to emergency department (ED) overcrowding, including definitions of overcrowding, characteristics of an overcrowded ED, and causes of overcrowding, and secondarily to solicit potential solutions to the problem.

Methods:

Focus groups were conducted with front-line staff, physicians and managers from 7 EDs within an integrated health region. Participants received questions before the sessions, and an experienced moderator conducted the sessions and prepared transcripts from audio tapes. Analyses included identification of key themes and the interrelationships between those themes.

Results:

Focus group participants defined service pressures that result in overcrowding as “anything that impedes the flow of patients through the ED, affects the quality of care delivered or results in patient frustration and stress to staff.” Overcrowding, which can occur at any time of the day, was perceived to have many causes, including some seasonal factors. Two key problems were identified as causing many spin-off pressures: inefficient access to ED beds (stretchers) because of slow throughput of patients and staff shortages. Other perceived causes included the changing role and use of EDs and limited access to services such as home care, diagnostic imaging, laboratory services, social services and specialist care. Participants generally believed that the characteristics and causes of overcrowding could not be viewed independently; rather, in the search for remedies, they should be considered as interrelated variables.

Conclusion:

Qualitative studies of this complex issue can identify and describe complex interactions in real-world settings. The findings of such studies can lead to quantitative studies involving objective measurement.
Canadian Emergency Department Triage and Acuity Scale (CTAS): Rural Implementation Statement
Authors:   Society of Rural Physicians of Canada Emergency committee (SRPC-ER) Working Group
Published: July 2016

BACKGROUND

The Canadian Emergency Department Triage and Acuity Scale (CTAS) has been recognized as a significant improvement in standardizing triage in Canadian emergency departments (EDs), both urban and rural. Since its publication an increasing number of Canadian EDs have implemented the CTAS. It was intended to improve patient care through more appropriate triaging of patients, but a number of adverse effects from its implementation have been encountered in rural EDs.
Ethical challenges of informed consent in prehospital research
Authors: Thompson James
Published: July 2016

Informed consent to participation in research is an important protector of potential subjects’ rights and autonomy. Ethical research involving critically ill people is challenging because their medical condition often makes obtaining informed consent impossible. This is especially true in the prehospital setting, where additional barriers to obtaining informed consent exist. A recently published Canadian policy (Tri-Council Policy Statement: Ethical Conduct for Research Involving Humans) specifies circumstances under which an exception to the requirement for informed consent may be granted so that vulnerable individuals are not denied the potential benefits of participating in research. This article reviews the rationale for theTri-Council Policy Statementand illustrates some problems with its application in the context of a Canadian prehospital study on continuous positive airway pressure. A new risk analysis model and a national research ethics board are discussed as possible ways to facilitate interpretation and application of the current exception of informed consent policy.
Mental nerve neuropathy: case report and review
Authors: Turner-Iannacci Amy , Mozaffari Eisa , Stoopler Eric T.
Published: July 2016

Mental nerve neuropathy (MNN) or “numb chin syndrome” is a rare neurologic symptom most often associated with malignancy. Patients typically develop paresthesia or numbness localized to the chin and lower lip and will often seek care at their local emergency department. Pain and expansion of the lower jaw may also be present. We report a case of MNN associated with a metastatic lesion in the mandible. The purpose of this article is to highlight the importance of recognizing MNN, a potentially life-threatening symptom of metastatic carcinoma, and enable clinicians to properly diagnose MNN, which may mimic other conditions that affect the mandible.
What is the risk of bacterial meningitis in infants who present to the emergency department with fever and pyuria?
Authors: Goldman Ran D. , Matlow Anne , Linett Lauren , Scolnik Dennis
Published: July 2016

Objectives:

To determine the rate of bacterial meningitis among febrile infants in the emergency department (ED) who have pyuria detected in an initial catheterized urine specimen.

Methods:

This retrospective chart review, conducted at the Hospital for Sick Children, Toronto, Ont., involved all children aged 0 to 3 months who presented to the ED with fever and pyuria (≥10 white blood cells/mm3) over a 3-year period. Cerebrospinal fluid (CSF) was evaluated using standard methods, and the rate of meningitis in children with pyuria was determined.

Results:

The study sample included 211 infants with fever and pyuria — 79 of these under 1 month of age. Eighty-one percent (171/211) had positive urine cultures, and 143 underwent lumbar puncture to rule out meningitis. Of these, 140 CSF samples were culture negative and 3 grew coagulase negativeStaphylococcus— 2 because of contamination and 1 because of a ventriculo-peritoneal shunt infection. Both children with CSF contamination grewEscherichia coliin the urine. The rate of bacterial meningitis in the study sample was 0% (95% confidence interval, 0%–2.6%).

Conclusions:

In this study of febrile children under 90 days of age with fever and pyuria, the incidence of concurrent meningitis was 0%. This suggests that recommendations for mandatory lumbar puncture in such children should be reconsidered. However, until larger prospective studies define a patient subset that does not require CSF analysis, it is prudent to rule out meningitis, administer parenteral antibiotics for urinary tract infection, and admit for close observation.
Systematic reviews in emergency medicine: Part II. Critical appraisal of review quality, data synthesis and result interpretation
Authors: Zed Peter J. , Rowe Brian H. , Loewen Peter S. , Abu-Laban Riyad B.
Published: July 2016

Reviews of the medical literature have always been an important resource for physicians. Increasingly, qualitative and quantitative systematic reviews (SRs) have replaced the traditional “narrative review” as a means of capturing and summarizing current evidence on a topic or, when possible, answering a specific clinical question. This paper is Part II of a 2-part series designed to provide emergency physicians with the background necessary to locate, critically evaluate and interpret SRs. The paper expands on the critical appraisal principles discussed in Part I by focusing on quality assessment, data synthesis and interpretation of results. To illustrate key points and facilitate readability, examples from the emergency medicine literature have been included and technical details have been kept to a minimum. The references, however, are comprehensive and provide a resource for readers seeking further information.
Early clinical predictors of severe acute respiratory syndrome in the emergency department
Authors: Wong W.N. , Sek Antonio C.H. , Lau Rick F.L. , Li K.M. , Leung Joe K.S. , Tse M.L. , Ng Andy H.W. , Stenstrom Robert J.
Published: July 2016

Objectives:

To assess the association of diagnostic predictors available in the emergency department (ED) with the outcome diagnosis of severe acute respiratory syndrome (SARS).

Methods:

This retrospective cohort study describes all patients from the Amoy Garden complex who presented to an ED SARS screening clinic during a 2-month outbreak. Clinical and diagnostic predictors were recorded, along with ED diagnoses. Final diagnoses were established independently based on diagnostic tests performed after the ED visit. Associations of key predictors with the final diagnosis of SARS were described.

Results:

Of 821 patients, 205 had confirmed SARS, 35 undetermined SARS and 581 non-SARS. Multivariable logistic regression showed that the strongest predictors of SARS were abnormal chest x-ray (odds ratio [OR] = 17.4), subjective fever (OR = 9.7), temperature >38°C (OR = 6.4), myalgias (OR = 5.5), chills and rigors (OR = 4.0) and contact exposure (OR = 2.6). In a subset of 176 patients who had a complete blood cell count performed, the strongest predictors were temperature ≥38ºC (OR = 15.5), lymphocyte count <1000 (OR = 9.3) and abnormal chest x-ray (OR = 5.7). Diarrhea was a powerful negative predictor (OR = 0.03) of SARS.

Conclusions:

Two components of the World Health Organization case definition — fever and contact exposure — are helpful for ED decision-making, but respiratory symptoms do not discriminate well between SARS and non-SARS. Emergency physicians should consider the presence of diarrhea, chest x-ray findings, the absolute lymphocyte count and the platelet count as significant modifiers of disease likelihood. Prospective validation of these findings in other clinical settings is desirable.
Proportion of injured alcohol-impaired drivers subsequently convicted of an impaired driving criminal code offence in British Columbia
Authors: Purssell Roy A. , Yarema Mark , Wilson Jean , Fang Ming , Simons Richard , Kasic Sharon , Abu-Laban Riyad B. , Brubacher Jeffrey , Lupu Ioana
Published: July 2016

Background:

Alcohol is a frequent contributing factor to motor vehicle collision injuries. Our objective was to determine the proportion of intoxicated drivers hospitalized following motor vehicle crashes who were subsequently convicted of an impaired driving criminal code offence.

Methods:

We reviewed British Columbia Trauma Registry records from Jan. 1, 1992, to Mar. 31, 2000, and identified drivers of motor vehicles who were hospitalized for treatment of crash-related injuries. Patient identifiers were then used to link with the Insurance Corporation of British Columbia’s (ICBC) contraventions database and the ICBC Traffic Accident System collisions database.

Results:

Of 6067 patients identified in the Trauma Registry, 4042 had not been administered a blood ethanol test, 209 had no driver’s licence match in the relevant databases and 119 died, leaving 1697 eligible patients. Mean age was 34 years, and 79.6% were male. The average Injury Severity Score was 20, the average hospital stay was 14 days and, among ethanol-positive patients, the mean ethanol level was 34.0 mmol/L (156.4 mg/dL). In patients with levels >17.3 mmol/L, the police had listed ethanol as a contributing factor in 70.6% of cases. Despite this, only 11.0% were convicted of impaired driving and 8.4% of another criminal offence; 10.7% received a 24-hour roadside prohibition, 3.9% received a 90-day administrative driving prohibition and 25.0% were convicted of a contravention of the Motor Vehicle Act. Forty-one percent were not convicted of any offence at all.

Conclusions:

Intoxicated drivers in British Columbia requiring hospitalization as a result of alcohol-related motor vehicle crashes are seldom convicted of impaired driving or other criminal code offences.
Cardiac concussion (commotio cordis)
Authors: Valani Rahim , Mikrogianakis Angelo , Goldman Ran D.
Published: July 2016

Blunt chest trauma in pediatric patients can result in various injuries to the myocardium. Cardiac concussion (commotio cordis) is seen in patients in whom the precordium has been struck with relatively little force at a vulnerable period of the cardiac cycle. These patients have no predisposing cardiac problems, and autopsy reveals no evidence of heart damage. The usual clinical presentation is that of immediate collapse secondary to a lethal arrhythmia. Prevention is the cornerstone of potentially decreasing the incidence with the aid of safety equipment and, possibly, immediate defibrillation.
Pyloric stenosis
Authors: Colletti James E.
Published: July 2016

In 1717, Blair first described pyloric stenosis based on autopsy findings. It was not until 1887 that Hirschsprung described the clinical picture and pathology of pyloric stenosis. Ninety years later, Teele and Smith described the use of ultrasonography to diagnosis pyloric stenosis. Traditionally, this diagnosis has been based on the clinical findings of projectile nonbilious vomiting, the palpation of a pyloric tumour (or “olive”), and the presence of classic metabolic disturbances. Currently, ultrasonography is regarded as the diagnostic test of choice for an infant presenting with nonbilious emesis in which an “olive” is not palpated.
Investigation of afebrile neonates with a history of fever
Authors: Brown Lance , Shaw Tania , Moynihan James A. , Denmark T. Kent , Mody Ameer , Wittlake William A.
Published: July 2016

Objective:

Our objective was to describe clinically significant infections in a cohort of afebrile neonates who underwent an emergency department (ED) septic workup because of the history of a measured fever at home.

Methods:

Retrospective medical record review of all infants ≤28 days of age who presented to our tertiary care pediatric ED between Jan. 1, 1999, and Aug. 22, 2002, underwent lumbar puncture in the ED, had a reported temperature at home of ≥38°C, and an ED triage temperature of <38°C. Laboratory and radiographic results were tabulated.

Results:

During the study period, 206 neonates underwent lumbar puncture in our ED. Of these, 108 were excluded because their home temperature was not documented, and 71 were excluded because they were still febrile on presentation to the ED. The study group consisted of the remaining 27 subjects, 4 of whom had received acetaminophen prior to ED arrival. Infections were confirmed in 10 (37%) subjects (3 urinary tract infections, 2 aseptic meningitis, 1 enterovirus meningitis, 1 respiratory syncytial virus bronchiolitis, 1 rotavirus enteritis and 2 pneumonias).

Conclusions:

Clinically important infections are not uncommon among afebrile neonates undergoing ED septic workup because of a measured fever at home. Some diagnostic testing is warranted in this group, although the clinical utility and indications for specific test modalities remain unclear.