INTRODUCTION: Although it is well known that medical students are not getting an adequate amount of sleep, there have been only few studies on the sleep patterns of medical students in Korea. Therefore, the present study aimed to investigate the life style and sleep patterns of Korean medical students and the impact they have on the students' academic performance. METHODS: A questionnaire package was administered to the 3rd year medical students at the Seoul National University to examine their sleep patterns on weekdays and weekends. It consisted of questions asking about their lifestyles as well as Pittsburgh sleep quality index (PSQI) and GPA (Grade Point Average) that are considered relevant to their sleep patterns. A total of 110 students (85 males and 25 females, mean age 24.4+/-20.6) responded to the survey and the result was analyzed using the independent t-test, the chi-square test, the paired t-test, Pearson's rank correlation and ANOVA. P-values of less than 0.05 were considered statistically significant in all analyses. RESULTS: The weekend bedtime was significantly delayed (01:24 on weekday; 03:12 on weekend; t=-5.23, p<0.01), the weekend rise time was delayed (07:36 on weekday; 10:30 on weekend; t=-24.48, p<0.01) and the total sleep time was increased on weekends (5:57 on weekday; 8:17 on weekend; t=15.94, p<0.01). They wished to sleep for 7 hours 6 minutes which was different from their actual weekday total sleep time (t=-11.41, p<0.01). The poor sleeper group had lower GPAs than the good sleeper group (t=2.05, p<0.05). The GPA of medical students were negatively correlated with age (r=-0.23, p<0.05), daily amount of smoking (r=-0.78, p<0.01), total amount of smoking (r=-0.75, p<0.01), weekday sleep latency (r=-0.23, p<0.05), weekend sleep latency (r=-0.23, p<0.05) and PSQI score (r=-0.30, p<0.01). CONCLUSION: Medical students were experiencing a lack of sleep during weekdays as they have a later bedtime and earlier rise time, and consequently had more hours of sleep on weekends. Overall, the responded students were experiencing poor sleep quality, and the GPAs of the poor sleeper group were lower than those of the good sleeper group.
Female ; Humans ; Korea ; Life Style ; Male ; Surveys and Questionnaires ; Smoke ; Smoking ; Students, Medical

A bronchial artery aneurysm (BAA) is uncommon and usually associated with chronic inflammatory lung disease or a systemic vascular condition, which is rarely the etiology of mediastinal hemorrhage. A middle-aged person presented with spontaneous hemothorax and hemomediastinum. A diagnostic evaluation identified a bronchial artery aneurysm as the source. To prevent further rupture, we performed a bronchial artery embolization. In the absence of trauma or other causes for hemothorax and mediastinal hemorrhage, the possibility of a BAA should be considered. A bronchial artery aneurysm can be managed by interventional techniques as well as surgery.
Aneurysm ; Bronchial Arteries ; Hemorrhage ; Hemothorax ; Humans ; Lung Diseases ; Mediastinum ; Rupture ; Vascular Diseases

A bronchial artery aneurysm (BAA) is uncommon and usually associated with chronic inflammatory lung disease or a systemic vascular condition, which is rarely the etiology of mediastinal hemorrhage. A middle-aged person presented with spontaneous hemothorax and hemomediastinum. A diagnostic evaluation identified a bronchial artery aneurysm as the source. To prevent further rupture, we performed a bronchial artery embolization. In the absence of trauma or other causes for hemothorax and mediastinal hemorrhage, the possibility of a BAA should be considered. A bronchial artery aneurysm can be managed by interventional techniques as well as surgery.
Aneurysm ; Bronchial Arteries ; Hemorrhage ; Hemothorax ; Humans ; Lung Diseases ; Mediastinum ; Rupture ; Vascular Diseases

BACKGROUND: The goal of this study was to evaluate whether a modified fluoroscopic technique for positioning a hook plate affected the clinical results of treating Neer type II distal clavicle fractures and Rockwood type V acromioclavicular (AC) joint separations with this device. METHODS: The study was a retrospective consecutive case series with data analysis. Sixty-four patients with a Neer type II distal clavicle fracture or a Rockwood type V AC joint injury treated between March 2009 and June 2013 were divided into 2 groups: traditional fluoroscopic technique (traditional view, 31 patients) or modified fluoroscopic technique ('hook' view, 33 patients). A visual analogue scale (VAS) score, the modified University of California-Los Angeles (UCLA) shoulder scale score, and radiographic osteolysis were the main outcome measures. RESULTS: The traditional group included a significantly larger number of patients with acromial osteolysis than the hook view group: 23 patients (74.2%) vs. 11 patients (33.3%), respectively (p=0.01). Before plate removal, the hook group reported less pain and higher UCLA shoulder scale scores than the traditional group: average VAS score, 1.55 vs. 2.26, respectively; average UCLA score, 30.88 vs. 27.06, respectively. However, there was no significant difference after plate removal. CONCLUSIONS: The hook view allows more accurate bending of the hook plate around the contour of the acromion, resulting in decreased osteolysis, decreased pain, and better function with the plate in situ.
Acromioclavicular Joint ; Acromion ; Clavicle* ; Dislocations ; Humans ; Joints ; Osteolysis ; Outcome Assessment (Health Care) ; Retrospective Studies ; Shoulder ; Statistics as Topic

Eosinophilic panniculitis is characterized by a prominent infiltration of numerous eosinophils in subcutaneous fat, and has been identified in patients with a variety of associated clinical conditions. A case of eosinophilic panniculitis in a 20-year-old woman with a history of atopic dermatitis is reported. She later developed superior sagittal sinus thrombosis, and we stress the importance of systemic evaluations in patients with eosinophilic panniculitis.
Dermatitis, Atopic ; Eosinophils* ; Female ; Humans ; Panniculitis* ; Subcutaneous Fat ; Superior Sagittal Sinus* ; Thrombosis* ; Young Adult

In a conventional two-dimensional (2D) culture method, cells are attached to the bottom of the culture dish and grow into a monolayer. These 2D culture methods are easy to handle, cost-effective, reproducible, and adaptable to growing many different types of cells. However, monolayer 2D cell culture conditions are far from those of natural tissue, indicating the need for a threedimensional (3D) culture system. Various methods, such as hanging drop, scaffolds, hydrogels, microfluid systems, and bioreactor systems, have been utilized for 3D cell culture. Recently, external physical stimulation-based 3D cell culture platforms, such as acoustic and magnetic forces, were introduced. Acoustic waves can establish acoustic radiation force, which can induce suspended objects to gather in the pressure node region and aggregate to form clusters. Magnetic targeting consists of two components, a magnetically responsive carrier and a magnetic field gradient source. In a magnetic-based 3D cell culture platform, cells are aggregated by changing the magnetic force. Magnetic fields can manipulate cells through two different methods: positive magnetophoresis and negative magnetophoresis. Positive magnetophoresis is a way of imparting magnetic properties to cells by labeling them with magnetic nanoparticles. Negative magnetophoresis is a label-free principle-based method. 3D cell structures, such as spheroids, 3D network structures, and cell sheets, have been successfully fabricated using this acoustic and magnetic stimuli-based 3D cell culture platform. Additionally, fabricated 3D cell structures showed enhanced cell behavior, such as differentiation potential and tissue regeneration. Therefore, physical stimuli-based 3D cell culture platforms could be promising tools for tissue engineering.

PURPOSE: This study was performed to investigate the epidemiology of enterovirus (EV) infections in children at a secondary hospital during recent 5 years. METHODS: We collected the cerebrospinal fluid, stool and throat swab samples from the pediatric patients with suspected EV infections in KEPCO Medical Center, Seoul, Korea from July 2006 to September 2010. EV detection and genotype identification were performed by RT-PCR at Korea Centers for Disease Control and Prevention. RESULTS: A total of 386 samples were collected from 277 patients during study period. Ninety-eight patients (35.4%) were diagnosed with EV infections. The RT-PCR positive rate was the highest in throat swab samples (48.3%). The median age of patient was 4.7 years (range, 0.1-12.5 years). Aseptic meningitis (50, 51.0%) was the most common clinical manifestation; herpangina (22, 22.4%) and hand-foot-mouth disease (18, 18.4%). One hundred EVs were isolated from 98 patients and 20 genotypes of EV were identified; Echovirus 30 (28 cases, 28%), Enterovirus 71 (12 cases, 12%), Echovirus 25 (10 cases, 10%), Echovirus 9 (9 cases, 9%) and Coxsackievirus A6 (8 cases, 8%). Aseptic meningitis caused by Echovirus 30 was the most common manifestation in 2008. There was no complicated case caused by Enterovirus 71. CONCLUSION: This study showed the epidemiology of confirmed EV infection in children from 2006 to 2010. There is a need for continuous surveillance of EV infections and its clinical manifestations.
Centers for Disease Control and Prevention (U.S.) ; Child ; Echovirus 9 ; Enterovirus ; Enterovirus B, Human ; Enterovirus Infections ; Genotype ; Herpangina ; Humans ; Korea ; Meningitis, Aseptic ; Pharynx

We report a case of subcutaneous phaeohyphomycosis caused by Exophiala(E,) jeanselmei in a 66-year-old female, who showed a mild tender, 4.5x3.5cm sized, erythematous cystic mass with satellite lesions on the left forearm for 4 months. Histopathologically, suppurative granulomatous inflammation, brownish conidia in a chain and hyphae were observed. Fungal culture grew out the typical black-gray velvety colonies of E. jeanselmei after 2 weeks. The isolate grow well at 25 C, but very poorly at 37 C. No growth could be observed at 40 C. Sporulation adequate for evaluation was present on the malt extract agar. We confirmed E. jeanselmei by colony and microscopic morphology, temperature tolerance and sugar assimilation tests. The patient had been treated with itraconazole for 6 momths. Complete remission was observed.
Agar ; Aged ; Exophiala* ; Female ; Forearm ; Humans ; Hyphae ; Inflammation ; Itraconazole ; Phaeohyphomycosis* ; Spores, Fungal

PURPOSE: To reassess the diagnostic value of plain radiographs, compared with computed tomography, in thediagnosis of acute traumatic spinal fracture. MATERIALS AND METHODS: Forty-six patients (total 64 cases) withacute traumatic spinal fracture were studied using plain radiographs and computed tomography. Fracture site andtype (according to the three-column theory), classification as major or minor injury, stability of fracture, andthe presence of associated soft tissue change were evaluated on plain radiographs and CT. The results of the twoimaging techniques were compared. RESULTS: Excluding eight cases of C1 and C2 fractures, 41 cases involvedfractures of the vertebral body, and 15 involved only the posterior column. Plain radiographs and CT showed,respectively, 27 and 25 cases of simple compression fracture, 13 and 16 of bursting fracture. One case ofcompression fracture was not detected on plain radiographs. The results of classification as major (43/56) orminor (13/56) injury were equivalent on plain and CT films. For the evalvation of unstable fracture, plainradiographs were superior to CT(stable fracture, 46/64; unstable fracture, 18/64), while for the evaluation ofsoft tissue change, CT was better than plain radiographs. CONCLUSION: If correct procedures are meticulouslyadhered to, plain radiographs of acute traumatic spinal injury provide good information for the diagnosis oftraumatic fracture.
Classification ; Diagnosis ; Fractures, Compression ; Humans ; Spinal Fractures* ; Spinal Injuries

The purpose of this study was to identify the consciousness of biomedical ethics and attitudes toward human tissue donation and transplantation among participants and non-participants in the anatomy camp program. Data collection is made from one hundred and eighty-two students who were enrolled in one university nursing department, in B metropolitan city. Ninety-six students participated in the anatomy camp program, while eighty-six students did not participate in the anatomy camp program. The total mean scores of consciousness of biomedical ethics between participants (2.03/4) and non-participants (1.96/4) were significantly different (t=2.217, p≤.028). And the total mean scores of attitudes toward human tissue donation and transplantation between participants (3.49/5) and non-participants (3.31/5) were significantly different (t=4.579, p≤.000). There were statistically significant differences between two groups in sub-categories of consciousness of biomedical ethics: organ transplantation, artificial insemination.
Bioethics* ; Consciousness* ; Data Collection ; Humans ; Humans* ; Insemination, Artificial ; Nursing* ; Organ Transplantation ; Students, Nursing* ; Tissue and Organ Procurement* ; Transplants