Publications by authors named "In Gyu Song"

: Infant FreeSurfer was introduced to address robust quantification and segmentation in the infant brain. The purpose of this study is to develop a new model for predicting the long-term neurodevelopmental outcomes of very low birth weight preterm infants using automated volumetry extracted from term-equivalent age (TEA) brain MRIs, diffusion tensor imaging, and clinical information. : Preterm infants hospitalized at Severance Children's Hospital, born between January 2012 and December 2019, were consecutively enrolled.

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  • Korea is facing increasing dementia rates in its super-aged society, prompting a need for effective end-of-life care strategies amidst existing legislative gaps in addressing medical and ethical challenges.* -
  • A web-based survey assessed the attitudes of 500 general population members and 200 clinicians regarding end-of-life treatment decisions, particularly focusing on nasogastric tube (NGT) use and mechanical ventilation (MV).* -
  • The study found significant differences in attitudes toward NGT withdrawal, with more general population members supporting it compared to clinicians, while both groups largely accepted withholding MV when patient intentions were clear; emphasizing the need for careful consideration of patient wishes in treatment decisions.*
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This study investigated neurodevelopment and risk factors in children surgically treated for congenital gastrointestinal anomalies (CGIA), excluding those with known high-risk factors such as low birth weight or chromosomal anomalies. Data of children born between 2008 and 2015 who underwent surgical treatment for CGIA were retrieved from the Korean National Health Insurance Database. CGIA included esophageal atresia, duodenal atresia, jejunoileal atresia, anorectal malformations, and congenital megacolon.

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Background: The vegetative state (VS) after severe acute brain injury (SABI) is associated with significant prognostic uncertainty and poor long-term functional outcomes. However, it is generally distinguished from imminent death and is exempt from the Life-Sustaining Treatment (LST) Decisions Act in Korea. Here, we aimed to examine the perspectives of the general population (GP) and clinicians regarding decisions on mechanical ventilator withdrawal in patients in a VS after SABI.

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Background: Despite medical advancements in neonatal survival rates, many children have poor neurological outcomes. Because the law in Korea restricts the withdrawal of life-sustaining treatment to only cases of imminent death, treatment discontinuation may not be an option, even in patients with poor neurological prognosis. This study investigated the opinions of the general population and clinicians regarding life-sustaining treatment withdrawal in such cases using hypothetical scenarios.

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Background: Despite the rising trend of tracheostomies in children, there is a lack of comprehensive resources for families to navigate the challenges of living with a tracheostomy, emphasising the need for evidence-based support in understanding postoperative care and long-term adjustments. This study aimed to examine the pattern of using healthcare services and nationwide medical outcomes in children who underwent a tracheotomy before the age of 2 years.

Methods: This retrospective study used the National Health Insurance System database from 2008 to 2016 and included all children codified with tracheotomy procedure codes before their second birthday.

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  • Dexamethasone is a corticosteroid used to prevent bronchopulmonary dysplasia (BPD) in preterm infants, and this study analyzes its use and effectiveness in very low birthweight infants over a period of 8 years in South Korea.
  • Of the 11,261 eligible infants, 20.5% received dexamethasone, with higher usage rates among those with lower gestational ages; however, those in the 'Dex' group had more severe cases of BPD and required increased ventilation support.
  • Factors contributing to poor response to dexamethasone included early inflammation, low birth weight, and complications such as pulmonary hypertension and treatments for ductus arteriosus.
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  • The study focused on the effects of sub-micron polyethylene and polypropylene microplastics on nitrogen cycling in a soil-soybean system.
  • Exposure to microplastics did not hinder soybean growth, but it notably boosted nitrogen uptake and increased microbial activity in the rhizosphere.
  • Despite changes in bacterial communities related to nitrogen cycling, the type and amount of microplastics did not significantly affect the overall results.
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Background: Trisomy 18 syndrome (T18) is the second most common autosomal trisomy and has a high risk of fetal loss and stillbirth. Aggressive surgical treatments for the respiratory, cardiac, or digestive systems of patients with T18 were previously futile, while the results of recent studies are controversial. Over the past decade, there have been approximately 300,000 to 400,000 births annually in the Republic of Korea; however, there have been no nationwide studies on T18.

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Background: This study aimed to evaluate whether mucous fistula refeeding (MFR) is safe and beneficial for the growth and intestinal adaptation of preterm infants with enterostomies.

Methods: This exploratory randomized controlled trial enrolled infants born before 35 weeks' gestation with enterostomy. If the stomal output was ≥ 40 mL/kg/day, infants were assigned to the high-output MFR group and received MFR.

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During the last several decades, the number of preterm infants has increased, and their survival rate has improved owing to advances in perinatal care. As more preterm infants survive, many studies examine their neurodevelopmental outcomes. This study aimed to summarize the neurodevelopmental outcomes of preterm infants according to gestational age at birth using a recently published meta-analysis.

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Unprecedented high concentrations of heavy metals have been detected in the groundwater at a zinc smelter in Seokpo, South Korea. The outflow of the contaminated groundwater into the nearby Nakdong River must be prevented by some means such as permeable reactive barrier (PRB). As a reactive material for injection-type PRB, we have tested sulfidated nanoscale zerovalent iron (S-nZVI) to assess its efficacy in remediating the groundwater from the smelter.

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Objective: To compare the effects of noninvasive neurally adjusted ventilatory assist (NIV-NAVA) to nasal continuous positive airway pressure (NCPAP) in achieving successful extubation in preterm infants.

Study Design: This prospective, single-center, randomized controlled trial enrolled preterm infants born at <30 weeks of gestation who received invasive ventilation. Participants were assigned at random to either NIV-NAVA or NCPAP after their first extubation from invasive ventilation.

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  • Research reveals a correlation between low birth weight (LBW) and increased risks of neurodevelopmental disorders like ADHD and ASD in children.
  • A study analyzed data from over 2 million children born in South Korea from 2008 to 2012, finding higher odds for ADHD and ASD in infants born under 2.5 kg.
  • The findings suggest that LBW children, especially those weighing less than 1.5 kg, require closer clinical monitoring despite a lack of data on gestational age.
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Objectives: The aim of this study was to estimate the age-specific effects of 8-hour maximum ozone levels on pneumonia in children and adolescents.

Methods: We performed quasi-Poisson regression analyses for individuals of 0-4 years, 5-9 years, 10-14 years, and 15-19 years of age using nationwide time-series data from the Korea (2011-2015). We constructed distributed lag linear models employing a generalized difference-in-differences method and controlling for other air pollutants.

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Background: School-aged children born very preterm have been suggested to have worse cognitive and behavioral outcomes than children born full-term. Executive function (EF) is a higher level of cognitive function related to academic achievement. The present study aimed to evaluate the cognitive (including EF) and behavioral outcomes of Korean children born extremely preterm (EP) and to analyze any biological or socioeconomic risk factors for poor cognitive outcomes in this population.

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  • - The study explored the viability and safety of 3D laparoscopic vaginoplasty using a rectosigmoid colon flap for vaginal reconstruction, involving 17 patients between September 2016 and February 2020.
  • - Of the 17 patients, 15 were transgender women and 2 were cisgender women with congenital deformities, with the average age being 33 years and an average surgery time of about 529 minutes.
  • - Results indicated that the procedure had a low 30-day readmission rate of 5.9% and showed promising perioperative and postoperative outcomes, suggesting it is a safe and effective option for vaginal reconstruction.
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Background: Adverse metabolic outcomes later in life have been reported among children or young adults who were born as preterm infants. This study was conducted to examine the impact of very preterm/very low birth weight (VP/VLBW) birth and subsequent growth after hospital discharge on cardiometabolic outcomes such as insulin resistance, fasting glucose, and systolic and diastolic blood pressure (BP) among children at 6-8 years of age.

Methods: This retrospective cohort study included children aged 6-8 years and compared those who were born at < 32 weeks of gestation or weighing < 1,500 g at birth (n = 60) with those born at term (n = 110).

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  • The study aimed to evaluate how effective direct swallowing training (DST) and its combination with oral sensorimotor stimulation (OSMS) were in improving oral feeding abilities in very preterm infants who were previously dependent on tube feeding.
  • Conducted as a randomized controlled trial in a South Korean neonatal intensive care unit, the trial included preterm infants born at less than 32 weeks gestation and measured the time taken for them to begin independent oral feeding (IOF).
  • Results showed that the combination of DST and OSMS significantly reduced the time to reach IOF compared to the control group, while DST alone did not show any notable benefits, indicating that combining these two interventions may enhance feeding capabilities in very preterm infants.
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Background: To investigate postnatal growth patterns and their relationship with the neurodevelopment of preterm infants born small for gestational age (SGA).

Methods: This retrospective cohort study analyzed 90 infants born SGA with a birthweight <1500 g or gestational age <32 weeks. Length, weight, and head circumference (HC) were recorded at birth, 35 weeks postmenstrual age (PMA), 40 weeks PMA, and 4, 9, and 18 months corrected age (CA).

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Background: Although the importance of palliative care in pediatric patients has been emphasized, many health care providers have difficulty determining when patients should be referred to the palliative care team. The Paediatric Palliative Screening Scale (PaPaS) was developed as a tool for screening pediatric patients for palliative care needs. The study aimed to evaluate the PaPaS as a reliable tool for primary care clinicians unfamiliar with palliative care.

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Purpose: This study presents the process of designing workbooks for advance care planning appropriate for the Korean cultural setting and describes actual case studies.

Methods: This study focused on single inductive case studies of the utilization of an advance care planning workbook and recruited individual participants.

Results: The workbook for adolescents contained six sessions and the workbook for children contained seven sessions.

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Background: The number of technology-dependent children (TDC) is increasing in South Korea, but available healthcare services after their discharge are poor. This study aimed to examine how TDC and caregivers live at home and identify their difficulties and needs regarding home care with few services to support them.

Methods: This cross-sectional study was conducted in a tertiary hospital for children in South Korea.

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