1.The Effects of Semi-Occluded Vocal Tract Exercises on Presbyphonia in Elderly Women: Two Case Reports
HyeJin LIM ; Dong Won LEE ; Jeong Kyu KIM ; Seong-Hee CHOI
Journal of the Korean Society of Laryngology Phoniatrics and Logopedics 2025;36(1):32-38
This case report investigates the effects of semi-occluded vocal tract exercises (SOVTEs) on voice improvement in elderly female patients with presbyphonia. Elderly female patients with presbyphonia commonly present with symptoms such as hoarseness, decreased vocal intensity, and phonatory difficulties. These symptoms are often associated with age-related vocal fold atrophy, leading to compensatory muscle tension and inefficient phonation, which necessitate targeted therapeutic interventions. In this study, two elderly female patients, aged 73 years and 71 years, participated in a voice therapy program centered on SOVTEs designed to promote vocal fold vibration efficiency and reduce compensatory tension. Case 1 underwent five therapy sessions, while Case 2 completed sixteen sessions. Pre- and post-treatment voice assessments revealed notable improvements in vocal quality, suggesting that SOVTEs may be an effective therapeutic approach for managing presbyphonia in elderly women.
2.The Effects of Semi-Occluded Vocal Tract Exercises on Presbyphonia in Elderly Women: Two Case Reports
HyeJin LIM ; Dong Won LEE ; Jeong Kyu KIM ; Seong-Hee CHOI
Journal of the Korean Society of Laryngology Phoniatrics and Logopedics 2025;36(1):32-38
This case report investigates the effects of semi-occluded vocal tract exercises (SOVTEs) on voice improvement in elderly female patients with presbyphonia. Elderly female patients with presbyphonia commonly present with symptoms such as hoarseness, decreased vocal intensity, and phonatory difficulties. These symptoms are often associated with age-related vocal fold atrophy, leading to compensatory muscle tension and inefficient phonation, which necessitate targeted therapeutic interventions. In this study, two elderly female patients, aged 73 years and 71 years, participated in a voice therapy program centered on SOVTEs designed to promote vocal fold vibration efficiency and reduce compensatory tension. Case 1 underwent five therapy sessions, while Case 2 completed sixteen sessions. Pre- and post-treatment voice assessments revealed notable improvements in vocal quality, suggesting that SOVTEs may be an effective therapeutic approach for managing presbyphonia in elderly women.
3.Variability in the Length of Stay and Daily Medical Expenses in Inpatient Care in Korea, 2010–2019:Hypertension and Pneumonia
Haejong LEE ; Jin-Won NOH ; Sanghee LEE ; Jung-Kyu CHOI ; Jin Yong LEE ; Hyejin LEE ; Jung-Hoe KIM
Journal of Korean Medical Science 2025;40(13):e120-
This study examined the variability in the length of stay (LOS) and daily medical expenses (DME) for hypertension and pneumonia inpatient care. Using 10 years of National Health Insurance Service data (2010–2019), a multilevel analysis assessed variability at the patient and institutional levels. During the study period, the mean LOS decreased, whereas the DME increased for both hypertension and pneumonia. Institutional level variability in the LOS increased during the study period, demonstrating greater variability than that for pneumonia. For both conditions, institutional-level variability was more marked in smaller institutions (hospitals and clinics) than in larger institutions (general and tertiary hospitals).These findings indicate a need for standardized healthcare service protocols to promote consistent and efficient patient care.
4.Variability in the Length of Stay and Daily Medical Expenses in Inpatient Care in Korea, 2010–2019:Hypertension and Pneumonia
Haejong LEE ; Jin-Won NOH ; Sanghee LEE ; Jung-Kyu CHOI ; Jin Yong LEE ; Hyejin LEE ; Jung-Hoe KIM
Journal of Korean Medical Science 2025;40(13):e120-
This study examined the variability in the length of stay (LOS) and daily medical expenses (DME) for hypertension and pneumonia inpatient care. Using 10 years of National Health Insurance Service data (2010–2019), a multilevel analysis assessed variability at the patient and institutional levels. During the study period, the mean LOS decreased, whereas the DME increased for both hypertension and pneumonia. Institutional level variability in the LOS increased during the study period, demonstrating greater variability than that for pneumonia. For both conditions, institutional-level variability was more marked in smaller institutions (hospitals and clinics) than in larger institutions (general and tertiary hospitals).These findings indicate a need for standardized healthcare service protocols to promote consistent and efficient patient care.
5.Variability in the Length of Stay and Daily Medical Expenses in Inpatient Care in Korea, 2010–2019:Hypertension and Pneumonia
Haejong LEE ; Jin-Won NOH ; Sanghee LEE ; Jung-Kyu CHOI ; Jin Yong LEE ; Hyejin LEE ; Jung-Hoe KIM
Journal of Korean Medical Science 2025;40(13):e120-
This study examined the variability in the length of stay (LOS) and daily medical expenses (DME) for hypertension and pneumonia inpatient care. Using 10 years of National Health Insurance Service data (2010–2019), a multilevel analysis assessed variability at the patient and institutional levels. During the study period, the mean LOS decreased, whereas the DME increased for both hypertension and pneumonia. Institutional level variability in the LOS increased during the study period, demonstrating greater variability than that for pneumonia. For both conditions, institutional-level variability was more marked in smaller institutions (hospitals and clinics) than in larger institutions (general and tertiary hospitals).These findings indicate a need for standardized healthcare service protocols to promote consistent and efficient patient care.
6.Variability in the Length of Stay and Daily Medical Expenses in Inpatient Care in Korea, 2010–2019:Hypertension and Pneumonia
Haejong LEE ; Jin-Won NOH ; Sanghee LEE ; Jung-Kyu CHOI ; Jin Yong LEE ; Hyejin LEE ; Jung-Hoe KIM
Journal of Korean Medical Science 2025;40(13):e120-
This study examined the variability in the length of stay (LOS) and daily medical expenses (DME) for hypertension and pneumonia inpatient care. Using 10 years of National Health Insurance Service data (2010–2019), a multilevel analysis assessed variability at the patient and institutional levels. During the study period, the mean LOS decreased, whereas the DME increased for both hypertension and pneumonia. Institutional level variability in the LOS increased during the study period, demonstrating greater variability than that for pneumonia. For both conditions, institutional-level variability was more marked in smaller institutions (hospitals and clinics) than in larger institutions (general and tertiary hospitals).These findings indicate a need for standardized healthcare service protocols to promote consistent and efficient patient care.
7.The Effects of Semi-Occluded Vocal Tract Exercises on Presbyphonia in Elderly Women: Two Case Reports
HyeJin LIM ; Dong Won LEE ; Jeong Kyu KIM ; Seong-Hee CHOI
Journal of the Korean Society of Laryngology Phoniatrics and Logopedics 2025;36(1):32-38
This case report investigates the effects of semi-occluded vocal tract exercises (SOVTEs) on voice improvement in elderly female patients with presbyphonia. Elderly female patients with presbyphonia commonly present with symptoms such as hoarseness, decreased vocal intensity, and phonatory difficulties. These symptoms are often associated with age-related vocal fold atrophy, leading to compensatory muscle tension and inefficient phonation, which necessitate targeted therapeutic interventions. In this study, two elderly female patients, aged 73 years and 71 years, participated in a voice therapy program centered on SOVTEs designed to promote vocal fold vibration efficiency and reduce compensatory tension. Case 1 underwent five therapy sessions, while Case 2 completed sixteen sessions. Pre- and post-treatment voice assessments revealed notable improvements in vocal quality, suggesting that SOVTEs may be an effective therapeutic approach for managing presbyphonia in elderly women.
8.An Artificial Intelligence-Based Automated Echocardiographic Analysis: Enhancing Efficiency and Prognostic Evaluation in Patients With Revascularized STEMI
Yeonggul JANG ; Hyejung CHOI ; Yeonyee E. YOON ; Jaeik JEON ; Hyejin KIM ; Jiyeon KIM ; Dawun JEONG ; Seongmin HA ; Youngtaek HONG ; Seung-Ah LEE ; Jiesuck PARK ; Wonsuk CHOI ; Hong-Mi CHOI ; In-Chang HWANG ; Goo-Yeong CHO ; Hyuk-Jae CHANG
Korean Circulation Journal 2024;54(11):743-756
Background and Objectives:
Although various cardiac parameters on echocardiography have clinical importance, their measurement by conventional manual methods is time-consuming and subject to variability. We evaluated the feasibility, accuracy, and predictive value of an artificial intelligence (AI)-based automated system for echocardiographic analysis in patients with ST-segment elevation myocardial infarction (STEMI).
Methods:
The AI-based system was developed using a nationwide echocardiographic dataset from five tertiary hospitals, and automatically identified views, then segmented and tracked the left ventricle (LV) and left atrium (LA) to produce volume and strain values. Both conventional manual measurements and AI-based fully automated measurements of the LV ejection fraction and global longitudinal strain, and LA volume index and reservoir strain were performed in 632 patients with STEMI.
Results:
The AI-based system accurately identified necessary views (overall accuracy, 98.5%) and successfully measured LV and LA volumes and strains in all cases in which conventional methods were applicable. Inter-method analysis showed strong correlations between measurement methods, with Pearson coefficients ranging 0.81–0.92 and intraclass correlation coefficients ranging 0.74–0.90. For the prediction of clinical outcomes (composite of all-cause death, re-hospitalization due to heart failure, ventricular arrhythmia, and recurrent myocardial infarction), AI-derived measurements showed predictive value independent of clinical risk factors, comparable to those from conventional manual measurements.
Conclusions
Our fully automated AI-based approach for LV and LA analysis on echocardiography is feasible and provides accurate measurements, comparable to conventional methods, in patients with STEMI, offering a promising solution for comprehensive echocardiographic analysis, reduced workloads, and improved patient care.
9.Comparison of remimazolam and midazolam for preventing intraoperative nausea and vomiting during cesarean section under spinal anesthesia: a randomized controlled trial
Kyuho LEE ; Seung Ho CHOI ; Sangil KIM ; Hae Dong KIM ; Hyejin OH ; Seung Hyun KIM
Korean Journal of Anesthesiology 2024;77(6):587-595
Background:
Preventing intraoperative nausea and vomiting (IONV) is crucial for maternal safety during cesarean section under spinal anesthesia. While midazolam is known to prevent IONV, we hypothesized that remimazolam would be superior due to its minimal hemodynamic effects. We compared the effects of the two drugs on IONV.
Methods:
Parturients scheduled for cesarean section were randomly assigned to receive either midazolam or remimazolam. They received midazolam 2 mg or remimazolam 5 mg, with additional doses administered upon request. The primary outcome measure was the incidence of newly developed IONV during sedation. Other outcomes included overall IONV, rescue antiemetic use, shivering, hemodynamic variables, sedation scale scores, and satisfaction scores.
Results:
Data from 80 participants were analyzed. Deeper sedation was induced in the remimazolam group (PGroup × Time < 0.001) despite comparable hemodynamic trends between the groups. The incidence of overall IONV was comparable between the two groups (27.5% in the midazolam group vs. 17.5% in the remimazolam group, absolute risk reduction [ARR]: 0.100, 95% CI [−0.082, 0.282], P = 0.284); however, newly developed IONV during sedation was significantly reduced in the remimazolam group (20.0% vs. 5.0%, ARR: 0.150, 95% CI [0.009, 0.291], P = 0.043). The need for rescue antiemetics was also lower in the remimazolam group (15.0% vs. 2.5%, ARR: 0.125, 95% CI [0.004, 0.246], P = 0.048).
Conclusion
Remimazolam significantly reduced the incidence and severity of newly developed IONV compared with midazolam, with minimal impact on hemodynamics, making it a useful sedative option for cesarean section.
10.Mortality and Disparities of Acute Myocardial Infarction and Stroke in Korea, 2008–2019
Ji-Sook CHOI ; Soomin KIM ; Choon-Seon PARK ; Hyejin LEE ; Jin Yong LEE ; Sun Min KIM
Yonsei Medical Journal 2024;65(9):534-543
Purpose:
Acute myocardial infarction (AMI) and stroke are leading global causes of death and can be used to assess acute care quality. We examined the 30-day mortality trends after emergency department admission for AMI and stroke in Korea from 2008 to 2019, focusing on regional and income disparities.
Materials and Methods:
The AMI and stroke patients admitted to hospitals in Korea were collected from the claims data. We analyzed age and sex-standardized 30-day mortality for AMI, as well as hemorrhagic and ischemic strokes. Disparities in mortality were analyzed using absolute differences and relative ratios between the Organization for Economic Cooperation Development (OECD) and Korea, and among income levels and regions in Korea. A 12-year joinpoint regression was used to determine the annual percent change and the average annual percent change.
Results:
The trends in the 30-day AMI mortality of Korea were not significantly changed from 2008 to 2019; the gap remained at 1.2 between the OECD and Korea. Korea maintained lower mortality rates for hemorrhagic and ischemic stroke than the mean of OECD. In Korea, the 30-day hemorrhagic stroke mortality showed a constant decreasing trend for the higher-income group living in urban areas; it led to a widened gap based on income levels in urban areas. The 30-day mortality for ischemic stroke tended to decrease in the higher-income group and urban areas.
Conclusion
National-level intervention is needed to manage regional and income-based disparities in AMI and stroke 30-day mortality. It is important to understand the variance in mortality rate by different geographical regions and income levels to establish an appropriate public health strategy.

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