Publications by authors named "Hye Ju Yeo"

Background: In regions with limited donor availability, optimizing efficiency in lung transplant decision-making is crucial. Preoperative prediction of 1-year graft failure can enhance candidate selection and clinical decision-making.

Methods: We utilized data from the Korean Organ Transplantation Registry to develop and validate a deep learning-based model for predicting 1-year graft failure after lung transplantation.

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Background: Despite the potential benefits of minimally invasive cardiac surgery (MICS), cardiopulmonary bypass (CPB) during MICS can cause pulmonary complications. However, the optimal ventilation strategy for the left lung under CPB during MICS remains unclear. Thus, this study aimed to evaluate differences in postoperative pulmonary ventilation and complications according to ventilation strategy during MICS.

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Background: The utility of the QuantiFERON-Monitor (QFM, Qiagen), a tool developed to assess general immune function, remains insufficiently explored in critically ill patients with acute respiratory failure (ARF). Therefore, we used the QFM to evaluate the immune function of patients with ARF at intensive care unit (ICU) admission and monitored QFM changes based on disease severity and clinical outcome correlations.

Methods: We evaluated the immune function of 99 patients with ARF in an ICU setting.

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Optimizing lung transplant candidate selection is crucial for maximizing resource efficiency and improving patient outcomes. Using data from the International Society for Heart and Lung Transplantation (ISHLT) registry (29,364 patients), we developed a deep learning model to predict 1-year survival after lung transplantation. Initially, 25 pretransplant factors were identified, and their importance was assessed using SHapley Additive exPlanations values.

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Background: Bronchiolitis obliterans syndrome (BOS) is a major challenge after lung transplantation (LT) and hematopoietic stem cell transplantation (HSCT), sharing pathological similarities but lacking identified common genetic mutations.

Methods: We conducted a comparative analysis of whole-genome sequencing data from lung tissue samples of patients with BOS after LT and HSCT to identify shared and distinct genetic alterations. Common variants were validated using Sanger sequencing of peripheral blood samples.

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Background: The impact of steroid treatment on mortality outcomes in patients with coronavirus disease 2019 (COVID-19) has been widely demonstrated, while its effect on secondary infections, such as bloodstream infections (BSIs), is controversial. Recent studies have reported the survival benefits of using steroids for a standard duration compared to extended use, though their impact on the risk of BSIs remains debated. This study investigated whether extended steroid use is associated with the risk of BSIs and mortality in critically ill patients with COVID-19.

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Objective: A functional immune system is essential for recovery from pneumonia; hence, measuring and monitoring immune-status indicators is clinically important. This study aimed to determine whether QuantiFERON monitoring (QMF) could predict healthcare-associated infection (HCAI) according to the immune-status of patients with pneumonia.

Methods: Prospective, observational, single-center study, patients ≥19 years hospitalized for pneumonia between October 2020 and November 2021.

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Background: An ideal lung allocation system should reduce waiting list deaths, improve transplant survival, and ensure equitable organ allocation. This study aimed to develop a novel lung allocation score (LAS) system, the MaxBenefit LAS, to maximize transplant benefits.

Methods: This study retrospectively analyzed data from the Korean Network for Organ Sharing database, including 1,599 lung transplant candidates between September 2009 and December 2020.

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Background: Malnutrition exacerbates the prognosis of numerous diseases; however, its specific impact on severe coronavirus disease 2019 (COVID-19) outcomes remains insufficiently explored.

Methods: This multicenter study in Korea evaluated the nutritional status of 1,088 adults with severe COVID-19 using the Geriatric Nutritional Risk Index (GNRI) based on serum albumin levels and body weight. The patients were categorized into two groups: GNRI >98 (no-risk) and GNRI ≤98 (risk).

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Article Synopsis
  • * Researchers analyzed clinical data from 669 patients admitted to the ICU, finding that 27.8% developed new frailty at discharge, with factors like older age and certain health conditions linked to this change.
  • * The findings indicate that new frailty is relatively common in these patients and is associated with various health factors, highlighting the need for better post-hospital care.
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Acute Interstitial Pneumonia (AIP) represents a severe form of diffuse lung injury within the idiopathic interstitial pneumonia spectrum. Given the limited understanding of its molecular basis, this study aims to elucidate AIP's genomic and transcriptomic profiles to uncover its pathophysiological underpinnings and identify potential therapeutic targets. We conducted a comprehensive analysis of genomic and transcriptomic data from lung tissues of 15 AIP patients.

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Article Synopsis
  • The study investigates the "obesity paradox," revealing that obese patients with sepsis have better one-year survival rates compared to non-obese patients.
  • Obese patients showed a lower mortality rate (52%) than their non-obese counterparts (64.8%) after sepsis, and body mass index (BMI) was found to significantly affect these outcomes.
  • Additionally, the research highlights the importance of muscle mass over fat mass in improving survival rates after sepsis, suggesting the need for targeted nutritional and conditioning programs for these patients.
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COVID-19 pandemic was accompanied by many healthcare-related issues. Concrete national data regarding the care performance of critical ill cases of COVID-19 does not exist in Korea. The current study aimed to describe the treatment outcome and healthcare resource utilization of critically ill COVID-19 patients.

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Article Synopsis
  • The study examines the potential of serum periostin levels as indicators for predicting bronchiolitis obliterans syndrome (BOS) in lung transplant patients, a topic that hasn't been widely researched.
  • Researchers compared gene expression between lung tissues from transplant patients and those with BOS and assessed periostin levels in 97 patients one year post-transplant and at BOS onset.
  • It was found that periostin levels were significantly higher in patients with BOS compared to stable patients, and higher levels at BOS onset correlated positively with a decline in forced expiratory volume (FEV1), suggesting periostin could be a useful biomarker for lung function decline after transplantation.
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  • A study looked at how to predict frailty (weakness) in patients after they recover from sepsis (a serious infection).
  • Researchers used data from a large number of patients in Korea to create a machine learning model that could help with this prediction.
  • The best model, called Extreme Gradient Boosting, did a great job in predicting frailty, both with the original patient data and data from COVID-19 patients.
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Article Synopsis
  • The study analyzed data from the Korean Network for Organ Sharing from March 2010 to August 2023, focusing on lung transplantation outcomes in elderly patients (over 65 years).
  • Out of 2574 patients on the waitlist, only 188 elderly patients received transplants, while 184 passed away waiting; idiopathic pulmonary fibrosis was the most common condition among these patients.
  • The findings indicated that elderly patients had a lower 1-year survival rate compared to younger patients, and being highly urgent at listing significantly increased the risk of post-transplant mortality.
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  • The study highlights the high mortality rate of patients on the lung transplant waitlist in Korea, necessitating fair allocation policies due to a shortage of donors.
  • Researchers simulated the Eurotransplant lung allocation score (ET-LAS) using data from the Korean Organ Transplantation Registry (KOTRY) to evaluate the current urgency-based system.
  • Findings suggest that the existing allocation criteria may not effectively prioritize patients based on urgency, particularly for those not in the highest urgency status, indicating a need for policy revision.
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Article Synopsis
  • - The study examines the usefulness of age-adjusted endothelial activation and stress index (age-EASIX) in predicting ICU mortality for critically ill COVID-19 patients in South Korea, based on data from 22 hospitals from January 2020 to August 2021.
  • - It involved 908 patients, averaging 67.4 years old, with non-survivors showing a significantly higher log2 age-EASIX compared to survivors, indicating that age-EASIX correlates with ICU mortality risk.
  • - The findings suggest that age-EASIX not only is significantly linked to ICU mortality but also outperforms the sequential organ failure assessment (SOFA) score in predicting outcomes for patients in ICU.
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Sepsis poses a significant threat to human health due to its high morbidity and mortality rates worldwide. Traditional diagnostic methods for identifying sepsis or its causative organisms are time-consuming and contribute to a high mortality rate. Biomarkers have been developed to overcome these limitations and are currently used for sepsis diagnosis, prognosis prediction, and treatment response assessment.

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  • Older age, particularly those over 80, is linked to worse outcomes in COVID-19 patients needing mechanical ventilation, with higher rates of organ dysfunction.
  • A study collected data from 434 patients across 22 medical centers, revealing that geriatric patients had higher mortality rates and less aggressive treatment than those aged 65-79.
  • Key factors influencing mortality included high creatinine levels and the use of specific life-sustaining treatments, emphasizing the need for tailored approaches to care for critically ill older patients.
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Background: The coronavirus disease (COVID-19) pandemic has significantly strained global healthcare, particularly in the management of patients requiring mechanical ventilation (MV) and continuous renal replacement therapy (CRRT). This study investigated the characteristics and prognoses of these patients.

Methods: This multicenter retrospective cohort study gathered data from patients with COVID-19 across 26 medical centers.

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Synopsis of recent research by authors named "Hye Ju Yeo"

  • - Hye Ju Yeo's recent research primarily focuses on critical areas in lung transplantation, sepsis, and chronic respiratory conditions, aiming to improve patient outcomes through innovative methodologies such as machine learning and biomarker identification.
  • - Findings include significant insights on predicting bronchiolitis obliterans syndrome using periostin levels, the implications of age-adjusted endothelial activation in COVID-19 mortality, and the performance of lung allocation systems in Korea, which highlight inequities in donor lung procurement.
  • - Yeo's studies also extend to understanding frailty post-sepsis, the role of the lung microbiome in chronic lung allograft dysfunction, and the effects of obesity in severe COVID-19 cases, underscoring the complexity of physiological responses in diverse patient populations.