Young-Hoon Byun

Background: In February 2024, the South Korean government announced a substantial increase in medical school admissions, leading to the sudden departure of most junior doctors. This unprecedented workforce shortage significantly impacted emergency departments. Pediatric care, known to require specialized readiness, may have been disproportionately affected. Methods: We conducted a retrospective study at an emergency institution with a specialized pediatric emergency center. The study period was divided into pre-policy (March 2023–January 2024) and post-policy (March 2024–January 2025) periods. All emergency visits were analyzed, and interhospital transfers were compared between periods. Interrupted time series (ITS) analysis, multivariable logistic regression and inverse probability of treatment weighting were performed to evaluate associations between the policy-driven workforce shortage and transfer occurrence. Subgroup analyses of transferred pediatric patients examined total length of stay, transfer reasons, and accompaniment by medical staff. Results: Among 97,916 ED visits (46,165 pediatric; 51,751 adult), there were 48 and 89 pediatric transfers in the pre- and post-policy periods, respectively, and 130 and 83 adult transfers in the same periods. Notably, pediatric transfers nearly doubled (an 85% increase) despite an approximately 42% decline in pediatric ED visit volume (29,211–16,954 visits). ITS analysis showed a continuing upward trend in pediatric transfers, although this trend did not reach statistical significance. In multivariable regression, only pediatric transfers were significantly associated with the post-policy period (OR 2.49, 95% CI 1.74–3.61). Transfer reasons shifted toward the unavailability of specialized care and physician accompaniment during transfers increased significantly. Conclusions: This study evaluated and identified the potential association between pediatric transfers and the government policy announcement, as well as the subsequent workforce departure, using statistical analyses and adjustment methods. Compared to adults, departure of the workforce following the policy announcement was more potentially associated with rises in pediatric transfers. Also, periodic changes in characteristics of pediatric interhospital transfers were observed. These findings reflect the vulnerability and complexity of pediatric emergency care and emphasize the necessity of ensuring medical readiness and specialized workforce capacity during times of healthcare disruption.

Background/Objectives: The COVID-19 pandemic substantially changed emergency care utilization patterns, but nationwide evidence comparing age-specific changes in 119 EMS-transported emergency department (ED) visits between children and adults remains limited. Using nationwide data from Korea’s public EMS system, we evaluated pre-COVID-19 and post-COVID-19 changes in 119 EMS-transported ED visits using KTAS-defined emergency acuity, ED disposition, and ED length of stay (ED LOS). Methods: We conducted a nationwide retrospective observational study using the National Emergency Department Information System. We included all 119 EMS-transported ED visits from 1 January 2019 to 31 December 2020 and used 23 February 2020 as the index date. Children were aged <20 years and adults were aged ≥20 years. The primary outcome was KTAS-defined emergency acuity; secondary outcomes were ED disposition and ED LOS. Multivariable logistic regression analyses were performed separately by age group. Results: A total of 2,104,163 119 EMS-transported ED visits were included. The proportion of pediatric visits decreased from 9.3% to 6.8% after COVID-19. Among children, crude emergency acuity decreased, whereas hospital admission and ED mortality increased; after adjustment, the odds of emergency acuity and hospital admission were slightly higher in the post-COVID-19 period. Among adults, emergency acuity, hospital admission, ED mortality, and ED LOS all increased, and adjusted odds of emergency acuity and hospital admission were also higher. Conclusions: Children showed mixed changes across severity-related indicators, whereas adults demonstrated a more consistent post-COVID-19 shift toward a higher-acuity clinical profile. Because these indicators were measured after ED arrival, the findings should be interpreted cautiously. Further studies using linked prehospital and hospital data are needed to better evaluate age-specific changes in EMS use.

Background/Objectives: Pediatric foreign body (FB) ingestion is a common clinical problem that frequently necessitates time-sensitive decisions regarding esophagogastroduodenoscopy (EGDS). Although established high-risk criteria guide the indication for EGDS, coins—despite their high prevalence—are not uniformly classified as high-risk FBs. In this study, we aimed to delineate epidemiology and endoscopic outcomes and to identify predictors of EGDS. Methods: We retrospectively reviewed cases of children younger than 15 years presenting to an urban emergency department (ED) with suspected or confirmed FB ingestion between 2014 and 2020. After applying exclusion criteria, 757 patients remained for analysis. Data abstracted included demographic characteristics, presenting symptoms, type and location of FB, ED length of stay (EDLOS), and whether EGDS was performed along with its outcomes. Multivariable logistic regression was used to identify predictors of EGDS, including age group, sex, symptom presence, established high-risk criteria, and type of FB (coin, button battery, magnet). Results: Among 757 children (median age 17.0 months; 54.0% male), 55.2% were asymptomatic. EGDS was performed in 47 of the 757 children (6.2%), with a success rate of 74.5% (35/47). Among EGDS cases, the most common foreign bodies were coins (29.8%), button batteries (27.7%), and magnets (17.0%). In multivariable models, established high-risk criteria were the dominant determinant of EGDS (adjusted OR ≈ 179.4; 95% CI, 29.9–1075.8; p < 0.001). Compared with button batteries, coin ingestion was independently associated with EGDS (adjusted OR ≈ 7.26; 95% CI, 1.07–49.31; p = 0.042). Conclusions: Established high-risk criteria were the primary determinant of EGDS, and coin ingestion showed a possible independent association with EGDS; these findings suggest that coin ingestion may warrant consideration as a potential high-risk factor when determining whether endoscopy is indicated.

Background/Objectives: Influenza poses significant risks in children, causing complications like febrile seizures and hospitalizations. Antiviral treatments include oseltamivir and peramivir, both FDA-approved neuraminidase inhibitors. This study aims to compare the effectiveness of intravenous peramivir and oral oseltamivir in pediatric patients presenting to an emergency department, with a primary focus on the revisit rate within 72 h post-treatment. Methods: A retrospective study analyzed 1327 children aged 1–15 years diagnosed with influenza A or B between 1 January 2019 and 29 February 2020, at a single urban hospital. Patients were divided into oseltamivir (n = 1243) and peramivir (n = 84) groups. Data included demographics, clinical symptoms, emergency department stays, and revisit rates. Fisher’s exact test was used for analysis, with p-values < 0.05 considered significant. Results: A total of 1327 pediatric patients were included, with 1243 receiving oseltamivir and 84 receiving peramivir. Patients in the peramivir group were older (median age 5.88 years vs. 4.54 years, p = 0.002) and had higher rates of gastrointestinal symptoms. The emergency department length of stay was significantly longer in the peramivir group (167 min vs. 63 min, p < 0.001). The revisit rate within 3 days was 5.63% for oseltamivir and 9.52% for peramivir, with no statistically significant difference (p = 0.22). Conclusions: Peramivir presents as an effective alternative treatment for influenza in children, particularly in situations where oral administration is not feasible due to gastrointestinal intolerance, highlighting the importance of an alternative route of antiviral administration.

Background/Objectives: With the advent of the field of pediatric emergency medicine, studies on the differences in treatment patterns between pediatricians and emergency medicine (EM) physicians in various pediatric conditions have been accumulating. This study aimed to compare croup (acute laryngotracheobronchitis) management patterns between pediatricians and EM physicians to enhance pediatric emergency care and inform the training of future specialists. Methods: A retrospective review of medical records was conducted for 1676 previously healthy children diagnosed with croup who visited a single pediatric emergency department (PED) of a tertiary university-affiliated hospital in South Korea, from March 2019 to February 2023. Patient characteristics, management patterns, and the impact of physician specialty on emergency care were analyzed. Results: EM physicians used injected dexamethasone monotherapy in 30.54% of the cases, more frequently than the 3.57% among pediatricians. In contrast, pediatricians used a combination of nebulized epinephrine and dexamethasone in 88.29% of the cases, compared with 67.71% for EM physicians. The appropriate use of nebulized epinephrine based on the Westley Croup Score was significantly higher in the EM physician group (77.64% vs. 57.89%, p < 0.001). Pediatricians also prescribed oral antibiotics and corticosteroids more frequently (25.13% vs. 3.13% and 81.54% vs. 22.69%, respectively; p < 0.001 for both). Despite these differences, there were no significant disparities in PED length of stay or 48 h revisit rates. Conclusions: EM physicians adhered more closely to currently accepted management algorithms for croup management. These findings underscore the need for standardized, evidence-based pediatric emergency care and provide valuable insights for training programs in this field.

Background/Objectives: This study aimed to compare croup management patterns between pediatricians and emergency medicine (EM) physicians to enhance pediatric emergency care and inform the training of future specialists. Methods: A retrospective review of medical records was conducted for 1,676 children diagnosed with croup who visited a single pediatric emergency department (PED) from March 2019 to February 2023. Patient characteristics, management patterns, and the impact of physician specialty on emergency care were analyzed. Results: EM physicians used injected dexamethasone monotherapy more frequently, whereas pediatricians favored combined use of nebulized epinephrine and dexamethasone. Pediatricians also prescribed oral antibiotics and corticosteroids at discharge more often. The appropriate use of nebulized epinephrine based on the Westley Croup Score was significantly higher in the EM physician group. Despite these differences, there were no significant disparities in PED length of stay or revisit rates within 48 hours. Conclusions: EM physicians adhered more closely to clinical guidelines for croup management. These findings underscore the need for standardized, evidence-based pediatric emergency care and provide valuable insights for training programs in this field.

(1) Background: Respiratory virus infections, including Coronavirus disease 2019 (COVID-19), seasonal influenza (FLU), and respiratory syncytial virus (RSV) as prominent examples, can severely affect both children and adults. This study aimed to investigate the clinical characteristics of respiratory viral infections in pediatric and adult populations and to identify determinants influencing patient hospitalization. (2) Methods: This retrospective study analyzed the electronic medical records of patients admitted to a regional hospital’s emergency department from 1 January 2015 to 31 December 2022, to investigate the clinical characteristics and hospitalization risk factors associated with these three viruses. (3) Results: Infants aged 1 to 11 months were most affected by COVID-19 and RSV, whereas FLU more commonly infected children aged 3 to 5 years. Key factors influencing hospitalization included age and abnormal chest X-ray findings, with higher risks observed in younger children and adults over 65. Notably, the presence of abnormal chest x-ray findings significantly increased the hospitalization risk by 1.9 times [1.5–2.4] in children and 21.4 times [2.4–189.0] in adults. (4) Conclusions: This analysis underscores the impact of COVID-19, FLU, and RSV on hospitalization risk, offering insights for managing these respiratory viral infections (RVIs). Age-related risk differences highlight the necessity for tailored strategies, improving understanding of and treatment development for RVIs.

Purpose: To evaluate the efficiency of the pediatric emergency ward (PEW) through the outcomes of children hospitalized to the ward by the department of pediatric emergency medicine (PEM).Methods: A chart review was completed for children (< 15 years) who were hospitalized to the PEW via the pediatric emergency center from March through May 2021. We compared the general characteristics and details regarding the outcomes depending on the departments they were hospitalized to, namely PEM, pediatrics (PED), and others.Results: We analyzed a total of 606 hospitalized children: PEM, 91; PED, 456; and others, 59. In the order listed above, their median ages were 2 years (interquartile range, 1-6), 1 year (0-4), and 9 years (7-14) (P < 0.001). The numbers of children with Korean Triage and Acuity Scale of 1-3 were 71 (78.0%), 400 (87.7%), and 33 (55.9%) (P < 0.001). Median length of stay (LOS) in the emergency department (ED) and hospital tended to be shorter in PEM (ED LOS: PEM, 4.3 hours vs. PED and others, 4.0-6.3 hours; hospital LOS: PEM, 19.0 hours vs. PED and others, 58.5-63.8 hours; all Ps < 0.001). The differences in the LOS were prominent between others and PEM (ED LOS, 1.538 [95% confidence interval, 1.353-1.749]; hospital LOS, 3.375 [2.741-4.157]). Transfers to other departments occurred only in PEM (4.4%) and PED (3.9%) whereas intensive care was performed only in others (27.1%). Return visits showed no difference among the 3 departments. Top 5 chief complaints and primary diagnoses of the children hospitalized to PEM were vomiting, fever, abdominal pain, head injury, and poisoning, and gastroenteritis, concussion, syncope, poisoning, and upper respiratory infection, respectively.Conclusion: Hospitalization to PEWs for short-term treatment or observation may relieve overcrowding in EDs or in hospitals, with comparable frequency of return visits.

This study aims to identify age-related suicide-related factors and changes in suicide rate before and after the onset of the COVID-19 pandemic. Methods: From 2018 to 2020, the patients who presented to the ED of a university hospital with a suicide attempt were classified into adolescents (≤18 years), adults (19–65 years), and elderly (>65 years), and the visits were grouped into before and after COVID-19. Results: There were 853 visits before and 388 visits after COVID-19, and the results showed that the number of adolescent and adult suicide patients increased immediately after the pandemic, but the overall trend did not show a significant difference from before the pandemic. In the adolescents, the ratio of male patients increased, interpersonal and school-related motivations decreased, the poisoning and cutting methods of suicide were more common, and hospitalization admissions increased. Among the elderly, the ratio of female patients increased, the number of single patients and patients without previous psychiatric problems increased, the motives for physical illness and death of people around increased, the falling and hanging methods of suicide were more common, and hospitalization admissions and deaths increased. Conclusion: The impact of COVID-19 on suicide rates and suicide-related factors varies by age group. This finding requires different approaches and methods to suicide prevention based on age.

Purpose: The authors aimed to investigate the utility of blood culture (BC) for children with simple febrile seizure (SFS) in the emergency department (ED) in the post-10/13-valent pneumococcal conjugate vaccine (PCV) era. Methods: This study was performed at the ED of a tertiary care university-affiliated women and children’s hospital, and involved 3,237 previously healthy children aged 6-60 months who visited the ED with SFS from January 2013 through December 2017. The SFS was defined according to the International Classification of Diseases, 11th Revision codes related to seizure. The children were divided into 2 groups according to the vaccination rates of the period of their visit: the 70-PCV (70%, 2013-2014) and 97-PCV (97%, 2015-2017) groups. The primary outcome was the yield, defined as a true positivity of BC. In addition, we collected information on baseline characteristics, ED length of stay, inflammatory biomarkers, and ED outcomes. Results: Of the 1,578 children with SFS who underwent BC, 1,357 belonged to the 97-PCV group. The median age of the study population was 22 months (interquartile range, 16.0-30.0), and 935 children (59.3%) were boys. Of the 41 children (2.6%) with positive BC results, 3 had the yield (0.2%): Staphylococcus aureus in 2 children and Streptococcus pneumoniae in the other. All 3 children belonged to the 97-PCV group. There were 38 contaminated BCs (2.4%; 95% confidence interval, 1.6%-3.2%). The 97-PCV group showed a shorter median ED length of stay (166.0 minutes [108.0-279.5] vs. 143.0 [109.5-209.5]; P = 0.010) and a lower rate of hospitalization (39.4% vs. 12.8%; P < 0.001). No differences between the 2 groups were found in the baseline characteristics and biomarkers.Conclusion: This study suggests a low utility of BC in previously healthy children with SFS in emergency settings in the post-10/13-valent PCV era.