Acute compartment syndrome (ACS) is a limb-threatening condition often first diagnosed by emergency physicians. Little is known about the rapidity with which permanent damage may occur. Our objective was to estimate the time to muscle necrosis in patients with ACS.

This historical cohort analysis of all patients who had a fasciotomy for ACS was conducted in 4 large teaching hospitals. Diagnosis was confirmed clinically or by needle measurement of compartment pressure. Muscle necrosis was determined using pathology reports and surgeons’ operative protocols. We used descriptive statistics and estimated tissue survival probability using the Vertex exchange method for interval-censored data.

Between 1989 and 1997 there were 76 cases of ACS. Most cases occurred in young men (median age 32) as a result of a traumatic incident (82%). Forty-nine percent (37/76) of all patients suffered some level of muscle necrosis, and 30% (11/37) of those with necrosis lost more than 25% of the muscle belly. Necrosis occurred in 2 of 4 cases in which the patient had been operated on within 3 hours of the injury, and our exploratory survival analysis estimates that 37% (95% confidence interval, 13%-51%) of all cases of ACS may develop muscle necrosis within 3 hours of the injury.

This is the largest cohort of ACS and the first clinical estimation of time to muscle necrosis ever published. Ischemia from ACS can cause muscle necrosis before the 3-hour period post-trauma that is traditionally considered safe. Further research to identify risk factors associated with the development of early necrosis is necessary.

Self-inflicted injury is commonly seen in emergency departments (EDs). It may be a precursor to death by suicide. The objective of this study was to examine the epidemiology of self-inflicted injury presentations to EDs in the province of Alberta.

Self-inflicted injury records for the 3 fiscal years 1998/99 to 2000/01 were accessed from the Ambulatory Care Classification System, a database that captures all ED encounters in the province of Alberta. Available data for each case included demographic details, location and time of visit, diagnoses and procedures.

There were 22 396 self-inflicted injury presentations to Alberta EDs during the study period. Self-inflicted injury rates were higher in females, younger patients, those on social services and those with Aboriginal treaty status. There were higher rates of return visits in the year following the self-inflicted injury than in other patient groups. Data showed regional variation. Trends could be seen in the timing of self-inflicted injury presentations by hour of day, day of week, and month of year.

Self-inflicted injury is common, with particularly high rates demonstrated among marginalized populations. This study provides comprehensive data on those who present with self-inflicted injuries, and can be used to guide further treatment, research and evaluation for this population.

Despite evidence-based clinical practice guidelines for the emergency management of asthma, substantial treatment variation exists. Our objective was to assess compliance with the Canadian Association of Emergency Physicians (CAEP) / Canadian Thoracic Society (CTS) Asthma Advisory Committee’s “Guidelines for the emergency management of asthma in adults” in the emergency department (ED) of a university-affiliated tertiary care teaching hospital.

This retrospective study was conducted in a Canadian inner city adult ED. Investigators reviewed all ED records for the period from Jan. 1, 2001, to Dec. 31, 2001, and identified adult patients (i.e., >18 years of age) with a primary ED diagnosis of asthma. Hospital records were then reviewed to document compliance with the CAEP/CTS asthma guidelines. Descriptive statistics, including means, standard deviations and frequencies were used to summarize information.

Overall compliance with the guidelines was 69.6%, (95% confidence interval, 64.7%–74.5%), but compliance ranged from 41.4% for severe asthma, 67.1% for moderate asthma, and 88.6% for mild asthma. Interobserver reliability for compliance assessment was excellent.

Despite publication and dissemination of evidence-based guidelines for the management of acute asthma in adults, guideline compliance at a university-affiliated, inner city, tertiary care teaching hospital ED is suboptimal.

Paroxysmal atrial fibrillation (PAF) is the rhythm disturbance most commonly encountered by emergency physicians, yet the role played by emergency physicians in the management of this condition has not been well described. The purpose of this study was to describe the management of uncomplicated PAF by Canadian emergency physicians.

All members of the Canadian Association of Emergency Physicians with a Canadian address (n = 1255) were mailed a 15-point questionnaire regarding training/certification, hospital demographics and practice patterns regarding the management of uncomplicated PAF. Chisquared analysis and Fisher’s Exact test were performed to identify significant differences in reported practice patterns in relation to demographic variables. Significant associations were tested for interaction using the Mantel–Haenszel test.

We received 663 responses, representing a 52.8% response rate. Six hundred and twenty-two (95%), 514 (78%) and 242 (38%) respondents reported routine performance of rate control, chemical cardioversion and electrical cardioversion respectively. Physicians working in high-volume emergency departments (>50 000 visits/yr) were significantly more likely to self-manage rate control and chemical/electrical cardioversion than those working in lower volume emergency departments. Residency training was associated with higher performance of electrical (44% v. 31%, p < 0.01) but not chemical cardioversion or rate control, although, amongst residency trained physicians, those with FRCP-level training were significantly more likely to perform both chemical (86% v. 76%, p < 0.05) and electrical (57% v. 37%, p < 0.01) cardioversion.

Canadian emergency physicians surveyed in this study actively manage uncomplicated PAF. We found significant variations in practice, especially related to the use of electrical cardioversion. This may reflect different practice environments, levels of training, and lack of evidence to guide best practice. Further research is required to determine the optimal care of PAF in the emergency department setting.

The aim of this study was to determine the inter-rater agreement between physicians and nurses regarding eligibility for application of the Canadian C-Spine Rule (CCR) and assessment of the criteria of the CCR.

In this observational study, nurses and physicians independently assessed the CCR criteria in a convenience sample of patients with potential C-spine injury. Data were entered onto separate data sheets. The outcomes of interest were the inter-rater agreement between nurse and physician regarding eligibility for application of the rule, for assessment of each component of the rule and for interpretation of the rule overall, assessed by kappa analysis.

In total, 88 cases were eligible for analysis. Physicians and nurses agreed on which patients were eligible for CCR application in 96.6% of cases. Inter-rater agreement for most CCR criteria was good (κ > 0.61), with the exception of midline tenderness (κ = 0.58) and range of motion, which most nurses did not test.

This study shows that nurses have the potential to reliably apply the Canadian C-Spine Rule but require further training in the assessment of midline tenderness and range of motion.

The objective of this study was to evaluate the utility of circumferential casting in the emergency department (ED), orthopedic follow-up visits, and radiographic follow-up in the management of children with wrist buckle fractures.

We performed a retrospective medical record review of all children < 18 years of age who presented to our tertiary care children’s hospital between July 1, 2000, and June 30, 2001, and were diagnosed with a fracture of the wrist, radius or ulna. Based on the radiology reports, we identified buckle fractures of the distal radius, the distal ulna, or both bones. We excluded children who had other types of fractures.

We identified 840 children with fractures of the wrist, radius, or ulna. Of these, 309 met our inclusion criteria. The median age of our study cohort was 9.2 years. Emergency physicians immobilized 269 of these fractures in circumferential casts; of these, 30 (11%) had cast complications. Of the 276 subjects who had orthopedic follow-up visits and radiographs, 184 (67%) had multiple visits and 127 (46%) had multiple radiographs performed. No subjects had fracture displacement identified on follow-up.

Orthopedic follow-up visits and radiographic follow-up may have minimal utility in the treatment of pediatric wrist buckle fractures. ED casting may pose more risk than benefit for these children. Splinting in the ED with primary care follow-up appears to be a reasonable management strategy for these fractures. A prospective study comparing ED splinting and casting for pediatric wrist buckle fractures is needed.

Magnesium deficiency may play a role in the pathogenesis of migraines and other headaches. Studies in outpatient clinics have found that magnesium administered intravenously (IV) reduces headache pain. We investigated the effectiveness of IV magnesium in patients with acute benign headache who presented to the emergency department (ED).

This randomized double-blind placebo-controlled trial compared 2 g of IV magnesium versus placebo for the treatment of patients with acute benign headache who presented to the EDs of two teaching hospitals. Pre- and post-treatment pain scores were measured on a 100-mm visual analog pain scale.

Forty-two patients were randomized, 21 in each treatment group. Treatment groups had similar baseline characteristics. After treatment, placebo recipients reported an 8-mm median improvement in pain, and magnesium recipients had a 3-mm improvement (p = 0.63). We found no statistically significant difference between groups for any secondary outcomes; however, the patients who received magnesium had significantly (p = 0.03) more side effects than did those in the placebo group.

We found no benefit to using IV magnesium to treat patients with acute benign headache who present to the ED.

Our objective was to determine the practice patterns of Canadian emergency physicians with respect to the management of traumatic corneal abrasions.

After developing our instrument and pilot testing it on a sample of emergency residents, we randomly surveyed 470 members of the Canadian Association of Emergency Physicians, using a modified Dillman technique. We distributed a pre-notification letter, an 18-item survey, and appropriate follow-up surveys to non-responders. Those members with an email address (n = 400) received a Web-based survey, and those without (n = 70) received a survey by post. The survey focused on the indications and utilization of analgesics (oral and topical), cycloplegics, eye patches and topical antibiotics.

Our response rate was 64% (301/470), and the median age of respondents was 38 years. Most (77.7%) were male, 71.8% were full-time emergency physicians, 76.5% were emergency medicine certified, and 64.4% practised in teaching hospitals. Pain management preferences (offered usually or always) included oral analgesics (82.1%), cycloplegics (65.1%) and topical nonsteroidal anti-inflammatory drugs (NSAIDs) (52.8%). Only 21.6% of respondents performed patching, and most (71.2%) prescribed topical antibiotics, particularly for contact lens wearers and patients with ocular foreign bodies. Two-thirds of the respondents provided tetanus toxoid if a foreign body was present, and 46.2% did so even if a foreign body was not present. Most respondents (88.0%) routinely arranged follow-up.

This national survey of emergency physicians demonstrates a lack of consensus on the management of traumatic corneal abrasions. Further study is indicated to determine the optimal treatment, particularly regarding the use of topical NSAIDs.