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Dong-Yul Ko

Yonsei University · 医学

研究室紹介

Professor Dong-Yul Ko's research lab specializes in emergency medicine and critical care, with a focus on improving outcomes in acute medical conditions through innovative diagnostic tools and therapeutic interventions. The lab investigates trauma-related injuries—particularly craniofacial trauma from e-scooter accidents—and explores the role of oral and maxillofacial surgeons in emergency care. It also examines the use of advanced respiratory support like high-flow nasal cannula in heart failure patients and evaluates novel biomarkers such as the delta neutrophil index for early severity prediction in acute cholangitis. Additionally, the lab contributes to public health policy research, including the impact of regulatory interventions like the paraquat ban on poisoning mortality.

emergency medicineacute cholangitishigh-flow oxygen therapycraniofacial traumabiomarker prognosis

Research Overview

Papers
54
Total Citations
286
Papers (5y)
8
Primary Field
医学

Research Output Trend

Figures are computed from collected data and may differ slightly.

Publications per year (5y)
8total
2022
2023
2024
2025
2026
Citations per year (5y)
13total
20222023202420252026

Selected Papers

15
1
Article|58 citations·2017
Effects of Paraquat Ban on Herbicide Poisoning-Related Mortality
Dong Ryul Ko, Sung Phil Chung, Je Sung You, Soohyung Cho, Yong Jin Park, Byeongjo Chun, Jeong Mi Moon, Hyun Kim, Yong Hwan Kim, Hyun Jin Kim, Kyung-Woo Lee, SangChun Choi
SJR Q2Yonsei Medical JournalOA

This study suggests that the paraquat ban decreased intentional herbicide ingestion and contributed to lowering herbicide poisoning-associated mortality. The change point analysis suggests a certain timeframe was required for the manifestation of regulatory measures outcomes.

SurgeryMedicine
2
Article|37 citations·2012
Use of Bedside Sonography for Diagnosing Acute Epiglottitis in the Emergency Department
Dong Ryul Ko, Yong Eun Chung, Incheol Park, Hye‐Jeong Lee, Jong Woo Park, Je Sung You, Tae Nyoung Chung, Yoo Seok Park, Sung Phil Chung, Seungho Kim
SJR Q2Journal of Ultrasound in Medicine

The anteroposterior diameter of the epiglottis was significantly different between the patients with epiglottitis and the healthy volunteers. Because of this significant difference in the anteroposterior diameter of the epiglottis, sonography can be used as a rapid, noninvasive, and effective diagnostic tool for identifying cases of epiglottitis in the emergency department.

Infectious DiseasesMedicine
3
Article|35 citations·2020
Craniofacial and dental injuries associated with stand‐up electric scooters
Minsik Kim, Soyeon Lee, Dong Ryul Ko, Dae‐Hoon Kim, Jong‐Ki Huh, Jae‐Young Kim
SJR Q1Dental TraumatologyOA

BACKGROUND/AIM: With the recent increased share of stand-up electric scooters (e-scooters), it is common to see people riding e-scooters on the roads in Korea. The aim of this study was to investigate traumatic injuries to the craniofacial region related to e-scooter accidents and to determine the role of dentists (especially oral and maxillofacial surgeons) in the evaluation of patients with trauma at the emergency department due to an e-scooter accident. MATERIALS AND METHODS: This retrospecti

TransportationSocial Sciences
4
Article|31 citations·2020
Benefits of High-Flow Nasal Cannula Therapy for Acute Pulmonary Edema in Patients with Heart Failure in the Emergency Department: A Prospective Multi-Center Randomized Controlled Trial
Dong Ryul Ko, Jin Ho Beom, Hye Sun Lee, Je Sung You, Hyun Soo Chung, Sung Phil Chung
SJR Q1Journal of Clinical MedicineOA

Heart failure patients with pulmonary edema presenting to the emergency department (ED) require an effective approach to deliver sufficient oxygen and reduce the rate of intubation and mechanical ventilation in the ED; conventional oxygen therapy has proven ineffective in delivering enough oxygen to the tissues. We aimed to identify whether high-flow nasal cannula (HFNC) therapy over time improved the respiratory rate (RR), lactate clearance, and certain arterial blood gas (ABG) parameters, in c

Pulmonary and Respiratory MedicineMedicine
5
Article|29 citations·2018
Flipped-classroom training in advanced cardiopulmonary life support
Jin Ho Beom, Ji Hoon Kim, Hyun Soo Chung, Su Mi Kim, Dong Ryul Ko, Junho Cho
SJR Q1PLoS ONEOA

Competency assessment after simulation-based training in ACLS undergone by senior medical students randomly assigned to flipped and traditional classrooms showed no statistical difference in competency between the two groups.

EducationSocial Sciences
6
Article|26 citations·2016
Usefulness of the Delta Neutrophil Index as a Promising Prognostic Marker of Acute Cholangitis in Emergency Departments
Hyunchul Kim, Taeyoung Kong, Sung Phil Chung, Jung Hwa Hong, Jong Wook Lee, Youngseon Joo, Dong Ryul Ko, Je Sung You, Incheol Park
SJR Q1ShockOA

PURPOSE: Recent technological advances have led to analyses of the delta neutrophil index (DNI), which reflects the fraction of circulating immature granulocytes, using specific automated blood cell analyzers. We evaluated the significance of the DNI as a prognostic marker for early severity in patients with acute cholangitis. METHODS: We retrospectively analyzed patients initially diagnosed with acute cholangitis at emergency department admission, followed by diagnostic confirmation, during a s

EpidemiologyMedicine
7
Article|9 citations·2021
Causative Substance and Time of Mortality Presented to Emergency Department Following Acute Poisoning: 2014-2018 National Emergency Department Information System (NEDIS)
Hyeonjae Lee, Minhong Choa, Eunah Han, Dong Ryul Ko, Jaiwoog Ko, Taeyoung Kong, Junho Cho, Sung Phil Chung
Journal of the Korean society of clinical toxicologyOA

Purpose: The purpose of this study was to investigate the cause of acute fatal poisoning and the time of death by analyzing the National Emergency Department Information System (NEDIS) of South Korea. Methods: The NEDIS data from 2014 to 2018 excluding non-medical visits were used for this study. The patients with acute poisoning were extracted using diagnostic codes. The toxic substances were classified into pharmaceuticals, pesticides, gases, artificial poisonous substances, and natural toxic

Emergency MedicineMedicine
8
Article|9 citations·2016
A bibliometric analysis of research productivity of emergency medicine researchers in South Korea
Jiun Choi, Je Sung You, Young Seon Joo, Taeyoung Kong, Dong Ryul Ko, Sung Phil Chung
SJR Q1Clinical and Experimental Emergency MedicineOA

OBJECTIVE: During the past 20 years, over 1,400 doctors have been certified as emergency physicians in Korea. The number of scientific publications in the field of emergency medicine has also increased. This study aims to evaluate the research productivity of academic emergency physicians in South Korea. METHODS: Articles published from 1996 to 2015 by authors affiliated with Korean emergency departments were retrieved using Pubmed, Embase, and Web of Science. Research productivity was analyzed

Public Health, Environmental and Occupational HealthMedicine
9
Article|6 citations·2017
Usefulness of the delta neutrophil index as an ancillary test in the emergency department for the early diagnosis of suspected acute promyelocytic leukemia
Dong Ryul Ko, Ji Eun Jang, Sung Phil Chung, Jong Wook Lee, Hye Sun Lee, Jung Hwa Hong, Taeyoung Kong, Je Sung You, Incheol Park
SJR Q2Leukemia & lymphoma/Leukemia and lymphomaOA

The delta neutrophil index (DNI) reflects the fraction of circulating immature granulocytes. We evaluated the usefulness of DNI values in patients with acute myeloid leukemia (AML) to distinguish the acute stage of acute promyelocytic leukemia (APL). We analyzed patients retrospectively who were first diagnosed with AML upon admission to the emergency department (ED). Thirty of the 134 patients (22.4%) were diagnosed with APL on ED admission. The univariate analysis and multivariate logistic reg

Molecular BiologyBiochemistry, Genetics and Molecular Biology
10
Article|6 citations·2022
Usefulness of contrast-enhanced multi-detector computed tomography in identifying upper gastrointestinal bleeding: A retrospective study of patients admitted to the emergency department
Dong‐Ju Kim, Ji Hoon Kim, Dong Ryul Ko, In Kyung Min, Arom Choi, Jin Ho Beom
SJR Q1PLoS ONEOA

Upper gastrointestinal bleeding (UGIB) is a major cause of clinical deterioration worldwide. A large number of patients with UGIB cannot be diagnosed through endoscopy, which is normally the diagnostic method of choice. Therefore, this study aimed to investigate the diagnostic value of multi-detector computed tomography (MDCT) for patients with suspected UGIB. In this retrospective observational study of 386 patients, we compared contrast-enhanced abdominopelvic MDCT to endoscopy to analyze the

GastroenterologyMedicine
11
Article|5 citations·2019
Usefulness of the Thrombotic Microangiopathy Score as a Promising Prognostic Marker of Septic Shock for Patients in the Emergency Department
Dong Ryul Ko, Taeyoung Kong, Hye Sun Lee, Sinae Kim, Jong Wook Lee, Hyun Soo Chung, Sung Phil Chung, Je Sung You, Jong Woo Park
SJR Q1Journal of Clinical MedicineOA

The thrombotic microangiopathy (TMA) score based on the development and morphological characteristics of schistocytes is a rapid, simple biomarker that is easily obtained from the complete blood cell count by an automated blood cell analyzer. We aimed to determine whether the TMA score is associated with 30-day mortality of patients with early-stage septic shock. This observational cohort study was retrospectively conducted based on a prospective emergency department (ED) registry (June 2015–Dec

EpidemiologyMedicine
12
Article|5 citations·2024
Hematoma expansion prediction in patients with intracerebral hemorrhage using a deep learning approach
Dong Ryul Ko, Hoon Na, Soozy Jung, Seung-Min Lee, Jeongmin Jeon, Sung Jun Ahn
SJR Q3Journal of Medical Artificial IntelligenceOA

Background: Intracerebral hemorrhage (ICH) constitutes a life-threatening medical emergency characterized by a high mortality rate. The precise prediction of hematoma expansion (HE) in individuals with ICH is crucial for guiding clinical decision-making. However, we lack a standardized automated system that harnesses artificial intelligence for the timely and accurate prediction of HE in ICH cases, particularly when non-contrast computed tomography (NCCT) imaging is employed in emergency setting

NeurologyMedicine
13
Review|5 citations·2018
The effect of time target on overcrowding and clinical quality in the ED: a systematic review and meta-analysis
Sung Phil Chung, Byoung Seok Yoon, Minhong Choa, Taeyoung Kong, Youngseon Joo, Ko Dong Ryul, Yoon Jung Hwang, Incheol Park, Hye Sun Lee
Journal of the Korean society of emergency medicine
Emergency MedicineMedicine
14
Article|3 citations·2018
Simulated internal jugular vein cannulation using a needle-guiding device
Ji Hoon Kim, Jin Ha Park, Junho Cho, Taeyoung Kong, Ji Hwan Lee, Jin Ho Beom, Young Seon Joo, Dong Ryul Ko, Hyun Soo Chung
SJR Q1The American Journal of Emergency MedicineOA
Emergency Medical ServicesHealth Professions
15
Article|3 citations·2019
Lactate/albumin ratio for the prediction of the development of sepsis-induced acute kidney injury in the emergency department
Jeong Woo Lee, Je Sung You, Sung Phil Chung, Minhong Choa, Taeyoung Kong, Dong Ryul Ko, Yoon Jung Hwang, Yong Hee Lee, Eun‐Cheol Park, Sinae Kim
Journal of the Korean society of emergency medicine
EpidemiologyMedicine

Research Areas

Emergency MedicineEpidemiologyPulmonary and Respiratory MedicinePharmacologyAerospace EngineeringSurgery

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