Dankook University Research Articles

Factors associated with treatment outcomes of patients hospitalized with severe maxillofacial infections at a tertiary center

ObjectivesThe purpose of this retrospective study was to evaluate the variables associated with length of stay (LOS), hospital costs, intensive care unit (ICU) use, and treatment outcomes in patients hospitalized for maxillofacial infections at a tertiary medical center in South Korea.Materials and MethodsA retrospective chart review was conducted for patients admitted for treatment of maxillofacial infections at Dankook University Hospital from January 1, 2011 through September 30, 2020. A total of 390 patient charts were reviewed and included in the final statistical analyses.ResultsAverage LOS and hospital bill per patient of this study was 11.47 days, and ₩4,710,017.25 ($4,216.67), respectively. Of the 390 subjects, 97.3% were discharged routinely following complete recovery, 1.0% expired following treatment, and 0.8% were transferred to another hospital. In multivariate linear regression analyses to determine variables associated with LOS, admission year, infection side, Flynn score, deep neck infection, cardiovascular disease, admission C-reactive protein (CRP) and glucose levels, number and length of surgical interventions, tracheostomy, time elapsed from admission to first surgery, and length of ICU stay accounted for 85.8% of the variation. With regard to the total hospital bill, significantly associated variables were age, type of insurance, Flynn score, number of comorbidities, admission CRP, white blood cell, and glucose levels, admission temperature, peak temperature, surgical intervention, the length, type, and location of surgery, tracheostomy, time elapsed from admission to first surgery, and length of ICU use, which accounted for 90.4% of the variation. Age and ICU use were the only variables significantly associated with unfavorable discharge outcomes in multivariate logistic regression analysis.ConclusionFor successful and cost-effective management of maxillofacial infections, clinicians to be vigilant about the decision to admit patients with maxillofacial infections, perform appropriate surgery at an adequate time, and admit them to the ICU.

Consideration on the Process and Utility of Editing in University Writing from the Perspective of Social Constructionism : Focusing on the case of academic writing at Dank ook University

대학에서 글쓰기 과목이 필수과목으로 안정적으로 운영되면서, 학생들의 글쓰기 완성도를 높이는 방법에 대한 관심도 높아지고 있다. 이에 본 논문은 사회구성주의 학습이론을 중심으로 효율적인 첨삭의 단계적 방법과 그 효용성에 대해서 고찰하는 것을 목적으로 했다. 사회구성주의는‘학습 환경’, ‘동료’, ‘교수자’와의 교류와 상호작용을 통해 지식이 구성된다고 전제하는데, 본고에서는 첨삭을 하나의 사회적 상호작용과 담화형식의 습득과정으로 보았다. 단계별로 보면, 첫 번째는 선행 예시의 모델링을 통한 자기첨삭이다. 모방과 관찰 학습을 통한모델링은 학문공동체가 추구하는 담화형식을 학습하는 데 효과적이며, 능동적인 학습자들의 자기효능감을 높이는 효과를 가질 수 있다. 두 번째는 토론을 통한 동료첨삭이다. 또래 집단과의 토론첨삭 과정을 통해 자기표현의 효과를 가져올 수 있으며, 타인의 글쓰기 첨삭을 통해 자신의 글을성찰적으로 바라볼 수 있다. 또 동료들의 다양한 관점에 대한 경험을 통해 자기중심적 사고에서벗어날 수 있다. 세 번째는 온오프라인을 통한 교수첨삭이다. 대면, 지면첨삭 등을 통해 학습자들이 높은 수준의 첨삭을 제공받아 글의 완성도를 높일 수 있다는 것과 교수자와의 소통을 통해신뢰도를 높이는 효과를 얻을 수 있다. 본 논문은 사회구성주의 이론을 적용해 효율적인 첨삭의단계를 설정하고, 그 효용성을 살펴봤다는 데 의의가 있다고 할 수 있다.

L2 Learners' Motivation Beliefs and Writing by Self-regulatory Summarizing

This study aimed to explore how explicit summarizing practices combined with self-regulation prompts influence motivation beliefs and writing performance by L2 learners at the beginner level. As a theoretical framework, the relationship among self-regulatory learning, motivational components and language performance was discussed. Regarding six motivational scales measured by using a shortened MSLQ, the results revealed there was significant and positive change in all the motivation scales after involved in the intervention: the highest perception change in both ‘intrinsic goal orientation’ and ‘task value’, followed by ‘control of learning belief’ and ‘self-efficacy for learning and performance’, and the least increase in ‘extrinsic goal orientation’, while negative perception of ‘test anxiety’ was significantly decreased. In terms of syntactic complexity measures as objective indices for language development, the length of production including the ‘mean length of sentence’, ‘T-unit’, and ‘clause’, was most significantly increased, followed by the number of ‘clauses per T-unit’ and ‘complex nominals per clause’ for phrase-level measures. These results indicated that L2 beginner learners' motivation beliefs for learning could positively increase and their writing performance could be improved with more complex syntactic forms of longer sentence, clause and phrase levels, when involved in systematic summarizing practices with self-regulation prompts, teacher guidance and feedback. (Dankook University)

Interrelationship between climatic factors and incidence of FBD caused by Clostridioides difficile toxin B, Clostridium perfringens, Campylobacter spp., and Escherichia coli O157:H7.

Foodborne diseases (FBDs) remain a global public health concern. Climatic factors such as wind-chill temperature, rainfall, and relative humidity affect the incidence of several FBDs. This study was performed to analyze how the various factors of the climate influence the incidence and severity of FBDs. This study retrospectively analyzed the results of multiplex polymerase chain reaction (mPCR) tests for diarrhea-causing bacteria performed on 2300 fecal samples obtained from patients at Dankook University Hospital, Cheonan, from June 2010 to December 2019. The Clostridioides difficile toxin B infection rate positively correlated with the intensity of sunshine, and the content of particulate matter. The Campylobacter spp. infection rate positively correlated with wind-chill temperature and the content of particulate matter. The Escherichia coli O157:H7 infection rate positively correlated with relative humidity. These findings may explain the dynamics and risks of Clostridioides difficile toxin B, Clostridium perfringens, Campylobacter spp., and Escherichia coli O157:H7 infection. They may help predict interrelationships among climatic factors and standardize national environmental health policies. However, in-depth research with large-scale data, molecular biology, and epidemiology would be required going forward. Future research would also require objective indicators of the changes in the prevalence of FBD-causing microbial pathogens for the effective prevention and management of these bacterial infections.

Effects of climatic factors and particulate matter on Rotavirus A infections in Cheonan, Korea, in 2010-2019.

Rotavirus A is the most common cause of infectious diarrhea worldwide. This study aimed to retrospectively study and analyze 4009 stool samples that were tested for viruses causing diarrhea, using multiplex reverse transcription PCR at Dankook University Hospital between 2010 and 2019. Furthermore, we determined the correlation between these factors and various climatic factors, including wind-chill temperature, relative humidity, rate of sunshine, and particulate matter. Rotavirus A infections occurred frequently in February, March, and April on an annual basis. Furthermore, during the study, the detection rate was highest at 17.0% (n=61/359) in 2011. Based on an analysis of weather big data, patient age, and period-specific infection during the summer, when the wind-chill temperature and relative humidity were high, the Rotavirus A infection rate was very low. Relative humidity (p=0.020) and particulate matter (p=0.049) were associated with the average number of monthly cases of Rotavirus A infection. However, wind chill temperature (p=0.074) and rate of sunshine (p=0.993) were not associated with the average monthly distribution of Rotavirus A cases. These results indicate that Rotavirus A infection was correlated with relative humidity and particulate matter during the study period and further the current understanding of the distribution of Rotavirus A infections resulting from climatic factors and particulate matter. This could help establish climate-related health policies to reduce the incidence of diarrhea and guide the development of vaccines against Rotavirus A.

Duet laparoscopic repair with knotless barbed sutures for treatment of perforated peptic ulcer: reality in general surgery with lacking of manpower.

BackgroundPerforated peptic ulcer (PPU) is a fatal complication of peptic ulcer disease, which requires emergency surgery. Laparoscopic repair is the widely accepted and effective method for the treatment of PPU. The aim of this study was to evaluate the safety and efficacy of duet laparoscopic repair of PPU with knotless barbed sutures.MethodsFrom January 2013 to May 2019, 40 patients with PPU underwent laparoscopic primary repair and omentopexy at the Dankook University Hospital. The operative outcomes and complications of patients undergoing surgery using continuous suturing with absorbable knotless barbed sutures (group A, n=15) were compared with those undergoing surgery with conventional interrupted sutures (group B, n=25).ResultsThe mean operative time was significantly shorter in group A than group B (84.4±39.8 vs. 104.2±49.4 min, P<0.001). There were no differences in other operative outcomes or postoperative complications (group A vs. group B, 20.0% vs. 24.0%, respectively; P=0.249) between the two groups. The mean operation time spent for laparoscopic sutures and omentopexy was 22.7 minutes.ConclusionsThe findings of the current study, albeit performed retrospectively at a single institution, suggested that duet laparoscopic repair of PPU with knotless barbed sutures might be considered as an alternative option, especially in hospitals lacking manpower.

Treatment options for advanced gastric cancer with peritoneal metastasis: experience from a single institution in Korea.

PurposeThis study aimed to compare treatment options and outcomes based on peritoneal cancer index (PCI) among patients with peritoneal metastasis (PM) of advanced gastric cancer (AGC).MethodsBetween January 2016 and July 2019, clinicopathological data of patients with AGC diagnosed with PM were reviewed. Different treatment methods were performed according to the PCI score: (1) group A (PCI ≤ 13) received cytoreductive surgery (CRS) and hyperthermic intraperitoneal chemotherapy (HIPEC) with postoperative intraperitoneal (IP) and systemic chemotherapy (n = 29), while (2) group B (PCI > 13) received IP chemotherapy with systemic chemotherapy (n = 22).ResultsClinical outcomes of 51 patients at the Dankook University Hospital were reviewed. Group A had a significantly lower mean PCI score (9.8 ± 6.9 vs. 32.6 ± 7.1, P < 0.01) than group B, with 25 patients (86.2%) achieving complete cytoreduction. Complications occurred in 16 patients (31.4%), none of who suffered mortality (group A: 11 patients, 37.9% vs. group B: 5 patients, 22.7%; P = 0.25). Among the morbidity, 5 cases (17.2%) and 2 cases (9.1%) exhibited a Clavien-Dindo grade greater than III in groups A and B, respectively (P = 0.04). Groups A and B had an overall median survival time of 34.0 and 16.0 months, respectively (P = 0.03).ConclusionPatients with PM of AGC received different treatments according to their PCI score. When accompanied with careful patient selection, our approach may be considered an acceptable option for the treatment of PM of AGC.

Molecular epidemiologic trends of norovirus and rotavirus infection and relation with climate factors: Cheonan, Korea, 2010-2019

Background: Viral infection outbreaks are emerging public health concerns. They often exhibit seasonal patterns that could be predicted by the application of big data and bioinformatic analyses. Purpose: The purpose of this study was to identify trends in diarrhea-causing viruses such as rotavirus (Gr.A), norovirus G-I, and norovirus G-II in Cheonan, Korea. The identified related factors of diarrhea-causing viruses may be used to predict their trend and prevent their infections. Method: A retrospective analysis of 4,009 fecal samples from June 2010 to December 2019 was carried out at Dankook University Hospital in Cheonan. Reverse transcription-PCR (RT-PCR) was employed to identify virus strains. Information about seasonal patterns of infection was extracted and compared with local weather data. Results: Out of the 4,009 fecal samples tested using multiplex RT-PCR (mRT-PCR), 985 were positive for infection with Gr.A, G-I, and G-II. Out of these 985 cases, 95.3% (n = 939) were under 10 years of age. Gr.A, G-I, and G-II showed high infection rates in patients under 10 years of age. Student's t-test showed a significant correlation between the detection rate of Gr.A and the relative humidity. The detection rate of G-II significantly correlated with wind-chill temperature. Conclusion: Climate factors differentially modulate rotavirus and norovirus infection patterns. These observations provide novel insights into the seasonal impact on the pathogenesis of Gr.A, G-I, and G-II.

Correction to: Multilevel-Modeling Interpretation of Trailing-Edge Noise Models for Wind Turbines with NACA 0012 Airfoil

Due to an unfortunate oversight the acknowledgment section has been omitted. It should be read: The present research was supported by the research fund of Dankook university in 2021

Effects of climatic factors on human parainfluenza 1, 2, and 3 infections in Cheonan, Republic of Korea.

Studying relationships between meteorological conditions and respiratory virus infections may help interpret the causality of disease outbreaks and provide a better understanding of the seasonal distribution of viruses. Therefore, in this study, we analyzed the correlations between meteorological data and the trends of infection by human parainfluenza virus-1 (HPIV-1; also known as human respirovirus 1), human parainfluenza virus-2 (human orthorubulavirus 2), and human parainfluenza virus-3 (human respirovirus 3) using 9010 viral samples collected at Dankook University Hospital from January 1, 2012, to December 31, 2018. Infection frequency data were used to detect the seasonal patterns of HPIV-1, HPIV-2, and HPIV-3 infections, and these patterns were compared with local weather data over the same period. We performed descriptive statistical analysis, frequency analysis, t test, and binomial logistic regression analysis to examine the relationships of weather and particulate matter conditions with the incidence of HPIV-1, HPIV-2, and HPIV-3 infections. The highest average infection rate with one of these three viruses (88.17%) was found in children aged 1-9 years. Specifically, the infection rate of HPIV-1 was 91.9% in children aged 1-9 years, whereas that of HPIV-2 and HPIV-3 was 86.3%. HPIV infection exhibited a meaningful relationship with climatic factors, such as temperature, wind-chill temperature, and atmospheric pressure. Our results suggest that climate changes might affect the rate of infection by HPIV. These findings may help in predicting the effectiveness of preventive strategies of HPIV infection.

Teaching Brazilian Literarure: A study of Clarice Lispector in Brazilian Portuguese as an additional language class

This article aims to discuss teaching and learning process of Portuguese as an additional language, taught through project-based learning for Korean students in higher education. For this article I propose the presentation and discussion of project learning about Brazilian Literature developed for the Conversation Portuguese Advanced I class, which were targeted at an audience of students at the intermediate, upper intermediate and advanced levels in the Portuguese-Brazilian Studies Department, College of Foreign Languages, at Dankook University in 2020. The teaching and learning experience reported in this article was carried out from teaching projects which were organized in didactic units with the main objective of promoting the study of Brazilian Literature in Portuguese as an additional language class having as departing point the short story O Mistério do Coelho Pensante (1967) – (The Mystery of the Thinking Rabbit) by Clarice Lispector writer. This research was carried out in three stages: first, a bibliographic review on the teaching of Brazilian Literature in the context of teaching Portuguese as an Additional Language was carried out; secondly, the study of critical fortune on children

Climate and Human coronaviruses 229E and Human coronaviruses OC43 Infections: Respiratory Viral Infections Prevalence in Hospitalized Children in Cheonan, Korea.

The study of climate and respiratory viral infections using big data may enable the recognition and interpretation of relationships between disease occurrence and climatic variables. In this study, realtime reverse transcription quantitative PCR (qPCR) methods were used to identify Human respiratory coronaviruses (HCoV). infections in patients below 10 years of age with respiratory infections who visited Dankook University Hospital in Cheonan, South Korea, from January 1, 2012, to December 31, 2018. Out of the 9010 patients who underwent respiratory virus real-time reverse transcription qPCR test, 364 tested positive for HCoV infections. Among these 364 patients, 72.8% (n = 265) were below 10 years of age. Data regarding the frequency of infections was used to uncover the seasonal pattern of the two viral strains, which was then compared with local meteorological data for the same time period. HCoV-229E and HCoV-OC43 showed high infection rates in patients below 10 years of age. There was a negative relationship between HCoV-229E and HCoV-OC43 infections with air temperature and wind-chill temperatures. Both HCoV-229E and HCoV-OC43 rates of infection were positively related to atmospheric pressure, while HCoV-229E was also positively associated with particulate matter concentrations. Our results suggest that climatic variables affect the rate in which children below 10 years of age are infected with HCoV. These findings may help to predict when prevention strategies may be most effective.

조선후기 이후 갖옷에 관한 연구-단국대학교 석주선기념박물관&gt; 소장 유물을 중심으로 -

조선후기 이후 갖옷에 관한 연구-단국대학교 석주선기념박물관&gt; 소장 유물을 중심으로 -

Three-dimensional Evaluation of Maxillary Sinus Volume in Different Sex Groups Using Cone-beam Computed Tomography

Background/Objectives: Determining the sex of corpses is the first step of identification in a forensic analysis. Accurate anatomical knowledge for the maxillary-sinus serves as an important mediator of forensic sex determination.Method/Statistical Analysis: This study included 57 patients (27 males and 30 females) of Dan-kook university dental hospital. Cone-beam computed tomography data images were imported and reconstructed into Three-dimensional models by an interactive medical image control system, Mimics 17.0 software. This study was analyze at 95% significance level using SPSS Version 20.0. The independent t-test was performed to compare the measured values among the two experimental groups.Findings: The volume of the maxillary sinus measured with traditional radiography may differ from its actual size. The maxillary sinus can be more accurately measured using a 3D model restructured using the CBCT data as the 2D base compared to simple linear measurement in 2D model. In the present study, sex-specific volumes of the maxillary sinus were measured using a 3D model, and there were no significant differences in the volumes between the left and right for both men and women. However, between sexes, the mean left sinus volume was significantly greater among men (23.25) than women (17.59) (p<0.05). The mean right sinus volume was also significantly greater among men (22.46) than women (17.35) (p<0.05).Improvements/Applications: This study obtained more accurate sex-specific anatomical data for the maxillary sinus using a 3D model. The volume of the maxillary sinus is valuable in researching sex determination.

Clinical Outcomes of Arteriovenous Graft in End-Stage Renal Disease Patients with an Unsuitable Cephalic Vein for Hemodialysis Access.

BackgroundAs the population of patients with end-stage renal disease has grown older, the proportion of patients with poorly preserved vasculature has concomitantly increased. Thus, arteriovenous grafts (AVG) have been used more frequently to access blood vessels for hemodialysis. Despite this increasing demand, studies of AVG are limited. In this study, we examined the surgical outcomes of upper-limb AVG creation.MethodsAmong the arteriovenous fistula formation procedures performed between January 2014 and March 2019 at Dankook University Hospital, 42 cases involved AVG creation. We compared patients in whom the axillary vein was used (group A; brachioaxillary AVG [B-Ax AVG]; n=20) with those in whom upper limb veins were used (group B; brachiobasilic AVG or brachioantecubital AVG; n=22).ResultsThe 1-year primary patency rate was higher in group A than in group B (57.9% vs. 41.7%; p=0.262). The incidence of postoperative complications was not significantly different between groups.ConclusionAVG using the axillary vein showed no major differences in safety or functionality compared to AVG using other veins. Therefore, accounting for age, underlying disease, and expected patient lifespan, B-Ax AVG can be considered an acceptable surgical method.

Clinical characteristics and treatment outcomes of patients with pneumonia caused by Raoultella planticola.

BackgroundRaoultella planticola, considered to be an environmental organism, is a rare cause of human infections. Although in recent years the frequency of R. planticola infections reported in the literature has increased, few cases of pneumonia caused by R. planticola have been described. Here, we investigate the clinical characteristics, management, and clinical outcomes of pneumonia caused by R. planticola.MethodsConsecutive patients with pneumonia caused by R. planticola were included. The medical records of patients with R. planticola pneumonia treated at Dankook University Hospital from January 2011 to December 2017 were collected.ResultsA total of 11 adult patients with R. planticola pneumonia were diagnosed and treated [10 males and 1 female; median age, 70 years (range: 51–79 years)]; 5 patients had underlying malignant conditions (45.5%). Antibacterial susceptibility testing showed that all isolates of R. planticola were susceptible to cephalosporins, carbapenems, fluoroquinolones, aminoglycosides, and beta-lactams/beta-lactamase inhibitors. Chest imaging revealed consolidation (8/11, 72.7%), ground-glass opacity (5/11, 45.5%), pleural effusion (5/11, 45.5%), and micronodules (3/11, 27.3%). Four patients (36.4%) required mechanical ventilation; three survived but one died of multiple organ dysfunction syndrome (principally pneumonia and septic shock).ConclusionsR. planticola pneumonia occurred mainly in patients with underlying risk factors such as malignant disease, cerebral infarction or hemorrhage, and chronic obstructive pulmonary disease. The organism was sensitive to most antibiotics, and the clinical outcomes were favorable after empirical antibiotic therapy.

Liberal Education, 그 오래된 미래를 향하여 - 교양교육 혁신을 위한 단국대학교의 도전

Liberal Education, 그 오래된 미래를 향하여 - 교양교육 혁신을 위한 단국대학교의 도전

시대적 요구에 따른 디자인 대학 패션디자인 학과의 전공 교육과정 개편과 교육환경 구성안 - 단국대학교 예술디자인대학 패션산업디자인과를 중심으로 -

시대적 요구에 따른 디자인 대학 패션디자인 학과의 전공 교육과정 개편과 교육환경 구성안 - 단국대학교 예술디자인대학 패션산업디자인과를 중심으로 -

Perception and attitudes of medical students on clinical clerkship in the era of the Coronavirus Disease 2019 pandemic

ABSTRACT Background The Coronavirus Disease 2019 (COVID-19) has been placing severe strain on global healthcare systems and medical education programs, leading to growing demands for medical students to assume the role of preliminary healthcare providers. Objectives To assess the perception and attitudes of medical students about clinical clerkship training during the COVID-19 pandemic. Design A cross-sectional survey with web-based 3-fields/14-items questionnaire was conducted, from April 7 to 14, 2020, to evaluate their self-assessed perception and attitudes on clerkship training of hospital practice under the COVID-19 outbreak and spread among 161 (78 on pre-clerkship course, 83 on clinical clerkship course) medical students at Dankook University College of Medicine, Cheonan, Republic of Korea. Results Of the 151 medical students who completed the survey, 81 students (53.7%) considered themselves familiar with COVID-19. Although the students were concerned about the spread of the virus during clinical clerkship training, 118 (78.1%) students preferred the clerkship training in a hospital practice. The students in the clinical clerkship program preferred this over those in the pre-clerkship program (85.7% vs. 70.2%, P = 0.03), primarily because a clinical clerkship could not be replaced by an online class during the COVID-19 pandemic. In addition, their responses indicated, in order of significance, fear of not completing the clerkship course on time, willingness to participate as a preliminary healthcare provider in pandemic, the potential waste of tuition, and belief that a hospital is rather safe. The change in the academic calendar had not a positive impact on the lifestyles of many students. Conclusions In circumstances such as the COVID-19 pandemic, educational strategies to clinical clerkship training for medical students should be developed to provide them with the opportunity to be actively involved in hospital practice under strict safety guidance focused on preventing virus infection and transmission.

Trends in Bacteria Causing Diarrheal Infection from 2010 to 2018 in Cheonan, Korea: Aeromonas spp., Campylobacter spp., and Clostridioides spp.

Diarrhea is one of the most common infectious diseases known worldwide. However, few studies have examined anaerobic diarrhea-causing bacteria (DB), which are difficult to culture. Recent advances in molecular biology have facilitated the detection and analysis of anaerobic DB. In this study, long-term trends in anaerobic DB were evaluated in Korea. From 2010 to 2018, symptoms of diarrhea reported were analyzed among patients hospitalized at the Dankook University Hospital in Korea. Results of multiplex polymerase chain reaction based on seasonality, age, overlapping infection, and other factors in patients were evaluated. DB were detected in 38.2% of 1716 stool specimens in the duration of the study. Of the pathogens detected using this method, 49.8% (n = 405/813) were anaerobic bacteria, including Clostridioides perfringens, Campylobacter spp., Clostridioides difficile toxin B, and Aeromonas spp. Among the four anaerobic bacteria, Clostridioides perfringens was the most commonly occurring (15.5%; n = 126/813). Detection rates of Clostridioides perfringens, Clostridioides difficile toxin B, and Aeromonas spp. were 34.1% (n = 22/ 55), 34.9% (n = 43/126), and 40.0% (n = 38/109), respectively. The detection rate of Campylobacter spp. (32.7%; n = 37/115) was the highest in patients between 10 and 20 years of age. The detection rate of anaerobic DB showed an increase in 2018 as compared with that in 2010, and the number of events of diarrhea caused by anaerobic DB also increased in this duration. Further studies are required to devise methods that might prevent the proliferation of anaerobic DB.