Chang Hwan Sohn

Learn More
BACKGROUND In South Korea, there is currently no syndromic surveillance system using internet search data, including Google Flu Trends. The purpose of this study was to investigate the correlation between national influenza surveillance data and Google Trends in South Korea. METHODS Our study was based on a publicly available search engine database,(More)
Anaphylaxis is a severe, potentially fatal, systemic allergic reaction that suddenly occurs after contact with an allergy-causing substance. The aims of this study were to evaluate the clinical characteristics and outcomes of patients who were diagnosed with anaphylaxis to fluorescein. The medical records of patients with anaphylaxis to intravenous(More)
The aims of this study were to evaluate the clinical characteristics and outcomes of patients with grayanotoxin poisoning due to mad honey brought from Nepal. Medical records of patients with mad honey poisoning admitted to the emergency department between 1 January 2004 and 31 May 2012 were retrospectively reviewed. A total of 15 patients were included in(More)
Extraadrenal paragangliomas involving the spine is less common and usually takes the form of intradural compression of the cauda equina. The authors report three cases of spinal paragangliomas resulting in extradural spinal cord compression and their MR findings. The MR imaging revealed a well-demarcated extradural mass with low to intermediate signal(More)
BACKGROUND Although the incidence of anaphylaxis is rapidly increasing, the clinical characteristics and associated factors of a biphasic reaction are unclear. OBJECTIVE To determine the incidence and clinical characteristics of biphasic reactions in patients with anaphylaxis treated with corticosteroids. METHODS A total of 655 patients with anaphylaxis(More)
OBJECTIVE We tried to evaluate the accuracy of the heel drop test in patients with suspected appendicitis and tried to develop a new clinical score, which incorporates the heel drop test and other parameters, for the diagnosis of this condition. METHODS We performed a prospective observational study on adult patients with suspected appendicitis at two(More)
The aim of this study was to determine whether initial shock index (SI) was independently associated with the requirement for massive transfusion (MT) in emergency department (ED) patients with primary postpartum hemorrhage (PPH). A retrospective cohort study of ED patients with primary PPH was performed at a university-affiliated, tertiary referral center(More)
OBJECTIVE To evaluate the utilization trends of advanced radiology, i.e. computed tomography (CT) and magnetic resonance imaging (MRI), examination in an emergency department (ED) of an academic medical center from 2001 to 2010. PATIENTS AND METHODS We assessed the overall CT and MRI utilization, and the ED patient encounters. Each examination was(More)
OBJECTIVES Many comatose patients following cardiac arrest have ischemic brain injury. Diffusion-weighted imaging is a sensitive tool to identify hypoxic-ischemic brain injury. The accurate prediction of the prognosis for comatose cardiac arrest survivors has been challenging, and thus, a multimodal approach, combining diffusion-weighted image findings,(More)
BACKGROUND Tension viscerothorax is herniation of abdominal viscera into the thorax. Tension viscerothorax can simulate tension pneumothorax. Immediate decompression with a nasogastric tube is required for hemodynamic stabilization. OBJECTIVE A case of tension viscerothorax is reported along with a review of the literature to highlight this rare(More)