ContextVentilation-perfusion (/) lung scanning and computed tomographic pulmonary
angiography (CTPA) are widely used imaging procedures for the evaluation of patients with …

Background Several diagnostic strategies using ultrasound imaging, measurement of D-dimer,
and assessment of clinical probability of disease have proved safe in patients with …

Background: The limitations of the current diagnostic standard, ventilation-perfusion lung
scanning, complicate the management of patients with suspected pulmonary embolism. We …

Background: To date, the benefit of prehospital advanced life-support programs on trauma-related
mortality and morbidity has not been established Methods: The Ontario Prehospital …

ContextHigh levels of variation and inefficiency exist in current clinical practice regarding
use of cervical spine (C-spine) radiography in alert and stable trauma patients.ObjectiveTo …

Objectives : The purpose of this study was to assess the effectiveness of contemporary
automatic external defibrillator (AED) use. Background : In the PAD (Public Access Defibrillation) …

Background The Canadian C-Spine (cervical-spine) Rule (CCR) and the National Emergency
X-Radiography Utilization Study (NEXUS) Low-Risk Criteria (NLC) are decision rules to …

ContextCurrent use of cranial computed tomography (CT) for minor head injury is increasing
rapidly, highly variable, and inefficient. The Canadian CT Head Rule (CCHR) and New …

Background In this randomized, double-blind, placebo-controlled trial, we studied the
effectiveness of prednisone in reducing the risk of relapse after outpatient exacerbations of chronic …

Background Survival rates for cardiac arrest patients, both in and out of hospital, are poor.
Results of a previous study suggest better outcomes for patients treated with vasopressin than …