Nancy Ewen Wang

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OBJECTIVES In the emergency department (ED), a significant amount of radiation exposure is due to computed tomography (CT) scans performed for the diagnosis of appendicitis. Children are at increased risk of developing cancer from low-dose radiation and it is therefore desirable to utilize CT only when appropriate. Ultrasonography (US) eliminates radiation(More)
PURPOSE To evaluate the effectiveness of a staged ultrasonography (US) and computed tomography (CT) imaging protocol for the accurate diagnosis of suspected appendicitis in children and the opportunity for reducing the number of CT examinations and associated radiation exposure. MATERIALS AND METHODS This retrospective study was compliant with HIPAA, and(More)
OBJECTIVE To assess whether physicians can identify very low likelihood of survival and very low likelihood of favorable functional outcome in adult nontrauma patients before admission to the intensive care unit (ICU) from the emergency department (ED). DESIGN Prospective survey. SETTING University hospital ED and ICU. PARTICIPANTS AND PATIENTS(More)
The Affordable Care Act (ACA) extended eligibility for health insurance for young adults ages 19-25. This extension may have affected how young adults use emergency department (ED) care and other health services. To test the impact of the ACA on how young adults used ED services, we used 2009-11 state administrative records from California, Florida, and New(More)
STUDY OBJECTIVE We describe the availability of preventive health services in US emergency departments (EDs), as well as ED directors' preferred service and perceptions of barriers to offering preventive services. METHODS Using the 2007 National Emergency Department Inventory (NEDI)-USA, we randomly sampled 350 (7%) of 4,874 EDs. We surveyed directors of(More)
The incidence of cerebral venous thrombosis (CVT) is three to four cases per one million in adults and seven cases per one million among children. We discuss a case of CVT in a 19-year-old woman with a history of migraine headaches. A CVT most commonly presents acutely, with a wide variety of signs and symptoms in young adults and children. The most common(More)
Dithionite is often used to deoxygenate aqueous solutions because it reacts readily with oxygen. However, milder reducing agents, that do not ordinarily react readily with oxygen, may do so in the presence of an appropriate redox catalyst. We show that dithiothreitol reacts rapidly with oxygen in concentrated hemoglobin solutions to produce a mixture of(More)
STUDY OBJECTIVE We determine the minimum mortality reduction that helicopter emergency medical services (EMS) should provide relative to ground EMS for the scene transport of trauma victims to offset higher costs, inherent transport risks, and inevitable overtriage of patients with minor injury. METHODS We developed a decision-analytic model to compare(More)
OBJECTIVES Patient transfers between hospitals are becoming more common in the United States. Disease-specific studies have reported varying outcomes associated with transfer status. However, even as national quality improvement efforts and regulations are being actively adopted, forcing hospitals to become financially accountable for the quality of care(More)