The American journal of emergency medicine
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The Bayesian approach to disease diagnosis in the emergency department is facilitated by the use of likelihood ratios (LRs) to evaluate diagnostic tests. The use of dichotomous, interval, and joint LRs for single and multiple tests is reviewed, and comparison is made to regression modeling. The clinical motivation for a single statistic to describe the average change in the odds of disease associated with the use of a particular test or series of tests is described. ⋯ Application of both tests together to patients with wide QRS complex tachycardia changes the odds of ventricular tachycardia, on average, by a factor of 3.5 (95% confidence interval, 2.4-6.2). Challenges are described, and methods are provided to estimate the 95% confidence interval of the LR and AALR using bootstrapping techniques. The AALR is a test statistic that may be helpful for clinicians and researchers in evaluating and comparing diagnostic testing approaches.
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Multicenter Study
Predictors of patient length of stay in 9 emergency departments.
Prolonged emergency department (ED) length of stay (LOS) is linked to adverse outcomes, decreased patient satisfaction, and ED crowding. This multicenter study identified factors associated with increased LOS. ⋯ Length of stay was increased on days with higher percentage daily admissions, higher elopements, higher periods of ambulance diversion, and during weekdays, whereas LOS was decreased on days with higher numbers of discharges and weekends. This is the first study to demonstrate this association across a broad group of hospitals.
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Myelography has been of great use as a diagnostic modality, especially when other modalities were not conclusive. However, considering the invasive nature of myelography, it should receive the attention of medical personnel for them to be aware of its possible complications, especially when newer agents are applied as the contrast media. ⋯ These complications include lower-extremity myoclonic spasms, tonic seizure leading to status epilepticus, rhabdomyolysis, disseminated intravascular coagulation and anaphylactic shock. Having the knowledge of possible complications and available solutions, particularly fatal ones, could prepare medical staff beforehand for primary and secondary preventions.
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Case Reports
Carotid artery dissection presenting with isolated headache and Horner syndrome after minor head injury.
A woman aged 31 years presented to the emergency department after a minor head injury. She reported mild headache and a metallic taste in her mouth. Full neurologic examination was remarkable only for left-sided Horner syndrome. ⋯ She was treated with aspirin. Symptoms and signs persisted 3 months later, but there was no additional neurologic deficit. We stress the importance of early detection of Horner syndrome to minimize the risk of disabling stroke.
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Noninvasive technology may assist the emergency department (ED) physician in determining the hemodynamic status in critically ill patients. The objective of our study was to show that ED physicians can accurately measure cardiac index (CI) by performing a bedside focused cardiac ultrasound examination. ⋯ Emergency department ED physicians can accurately measure CI using standard bedside ultrasound. A focused ultrasound cardiac examination to derive CI has potential use in the management of critical ill patients in the ED.