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Original Article
Neonatology (Perinatology)
Mortality of very low birth weight infants by neonatal intensive care unit workload and regional group status
Sung-Hoon Chung, Chae Young Kim, Yong-Sung Choi, Myung Hee Lee, Jae Woo Lim, Byong Sop Lee, Ki-Soo Kim; the Korean Neonatal Network
Clin Exp Pediatr. 2024;67(11):619-627.   Published online September 12, 2024
Question: How do structural and staffing characteristics of neonatal intensive care units (NICUs) influence the mortality rates of very low birth weight infants (VLBWIs)?
Findings: NICUs with higher staffing levels, particularly with more neonatologists, and those offering advanced care levels were associated with lower mortality rates. Additionally, regional disparities were observed, with some areas demon-strating significantly higher survival rates.
Meaning: Adequate staffing and equitable regional distribution of medical resources are crucial for improving survival outcomes in VLBWIs. Efforts to enhance NICU staffing and address regional healthcare disparities are essential for optimizing care quality and reducing mortality in this vulnerable population.
Review Article
Neonatology (Perinatology)
Neurodevelopmental outcomes of preterm infants
In Gyu Song
Clin Exp Pediatr. 2023;66(7):281-287.   Published online December 30, 2022
· Among survivors, 60.9% of infants born at 22 weeks’ gestation had moderate to severe impairments, whereas 50.3% born at 23 weeks’ and 42.2% at 24 weeks’ gestation had moderate to severe impairments.
· Moderate and late preterm infants reportedly have less severe disease than very preterm infants, but they still experience adverse neurodevelopmental outcomes.
· The careful follow-up and early detection of developmental problems in these patients are required.
Neurodevelopmental outcomes of very low birth weight infants in the Neonatal Research Network of Japan: importance of neonatal intensive care unit graduate follow-up
Yumi Kono; on behalf of the Neonatal Research Network of Japan
Clin Exp Pediatr. 2021;64(7):313-321.   Published online November 9, 2020
· Very low birth weight infants remain at high risk of developing neurodevelopmental impairments in early childhood.
· It is important to establish a network follow-up protocol and complete assessments with fewer dropouts to enable clarification of the outcomes of registered infants.
· All possible strategies should be employed to maintain good compliance after neonatal intensive care unit discharge.
Original Article
Neonatology (Perinatology)
Fluconazole prophylaxis against invasive candidiasis in very low and extremely low birth weight preterm neonates: a systematic review and meta-analysis
Mahmoud Robati Anaraki, Masoud Nouri-Vaskeh, Shahram Abdoli Oskoei
Clin Exp Pediatr. 2021;64(4):172-179.   Published online May 14, 2020
· Mortality is decreased significantly in meta-analysis of studies in different regimen of fluconazole prophylaxis.
· Significant decrease was seen in incidence of invasive candidiasis-associated mortality in extremely low birth weight infants in same schedules of prophylaxis.
· More studies required to relief the concerns.
Effect of red blood cell transfusion on short-term outcomes in very low birth weight infants
Eui Young Lee, Sung Shin Kim, Ga Young Park, Sun Hyang Lee
Clin Exp Pediatr. 2020;63(2):56-62.   Published online February 6, 2020
Question: Does RBC transfusion affect the short-term outcomes of VLBW infants?
Finding: The results showed that RBC transfusion was significantly related to the incidence of BPD (OR, 5.42; P<0.001) and NEC (OR, 3.40; P=0.009).
Meaning: Careful consideration of the patient’s clinical condition and appropriate guidelines is required before administering RBC transfusions.
Review Article
Neonatology (Perinatology)
Short- and long-term outcomes of very low birth weight infants in Korea: Korean Neonatal Network update in 2019
Jang Hoon Lee, YoungAh Youn, Yun Sil Chang; Korean Neonatal Network
Clin Exp Pediatr. 2020;63(8):284-290.   Published online February 5, 2020
The Korean Neonatal Network (KNN) has collected population-based data for very low birth weight infants (VLBWIs) born in Korea since 2013. The survival rate of all VLBWIs was 86% in Korea. The overall prevalence of cerebral palsy was 6.2%–6.6%. Bilateral blindness and hearing loss were reported in 0.2%–0.3%, 0.8%–1.9%, respectively. The KNN has published annual reports and papers for facilitating the improvement of VLBWIs outcome in Korea.
Original Article
Neonatology (Perinatology)
Synbiotics use for preventing sepsis and necrotizing enterocolitis in very low birth weight neonates: a randomized controlled trial
Ozge Serce Pehlevan, Derya Benzer, Tugba Gursoy, Guner Karatekin, Fahri Ovali
Clin Exp Pediatr. 2020;63(6):226-231.   Published online February 5, 2020
Background: Probiotics and prebiotics have strain-specific effects on the host. Synbiotics, a mixture of probiotics and prebiotics, are proposed to have more beneficial effects on the host than either agent has alone.
Purpose: We performed a randomized controlled trial to investigate the effect of Lactobacillus and Bifidobacterium together with oligosaccharides and lactoferrin on the development of necrotizing enterocolitis (NEC) or sepsis...
Developmental and Behavioral Medicine
Validity of the Korean Developmental Screening Test for very-low-birth-weight infants
Chae Young Kim, Euiseok Jung, Byong Sop Lee, Ki-Soo Kim, Ellen Ai-Rhan Kim
Clin Exp Pediatr. 2019;62(5):187-192.   Published online March 20, 2019

Purpose: The importance of the neurodevelopmental outcomes of very-low-birth-weight (VLBW) infants has been emphasized as their mortality rate has markedly improved. This study aimed to assess the validity of the Korean Developmental Screening Test (K-DST), a developmental screening tool approved by the Korean Society of Pediatrics, for the timely diagnosis of neurodevelopmental delay in VLBW infants. Methods: Subjects included VLBW infants...
Neonatology (Perinatology)
Association between vitamin D level at birth and respiratory morbidities in very-low-birth-weight infants
Ian Kim, Sung Shin Kim, Jee In Song, Seock Hwa Yoon, Ga Young Park, Yong-Wha Lee
Clin Exp Pediatr. 2019;62(5):166-172.   Published online October 24, 2018

Purpose: This study aimed to evaluate vitamin D status at birth in very-low-birth-weight infants (VLBWIs: <1,500 g) and to determine the association between vitamin D level and respiratory morbidity. Methods: A retrospective study was conducted at Soonchunhyang University Bucheon Hospital between November 2013 and November 2017. We collected blood samples and data on respiratory morbidity from 230 VLBWIs on the first...
The impact of a quality improvement effort in reducing admission hypothermia in preterm infants following delivery
Han Saem Choi, Soon Min Lee, Hoseon Eun, Minsoo Park, Kook-In Park, Ran Namgung
Clin Exp Pediatr. 2018;61(8):239-244.   Published online August 15, 2018

Purpose: Hypothermia at admission is associated with increased mortality and morbidity in preterm infants. We performed a quality improvement (QI) effort to determine the impact of a decrease in admission hypothermia in preterm infants. Methods: The study enrolled very low birth weight (VLBW) infants born at Gangnam Severance Hospital between January 2013 and December 2016. This multidisciplinary QI effort included the...
Postdischarge growth assessment in very low birth weight infants
Joon-Sik Park, Jungho Han, Jeong Eun Shin, Soon Min Lee, Ho Seon Eun, Min-Soo Park, Kook-In Park, Ran Namgung
Clin Exp Pediatr. 2017;60(3):64-69.   Published online March 27, 2017
Purpose

The goal of nutritional support for very-low-birth-weight (VLBW) infants from birth to term is to match the in utero growth rates; however, this is rarely achieved.

Methods

We evaluated postdischarge growth patterns and growth failure in 81 Korean VLBW infants through a retrospective study. Weight and height were measured and calculated based on age percentile distribution every 3 months until age 24...

Modification of nutrition strategy for improvement of postnatal growth in very low birth weight infants
Ah Young Choi, Yong Wook Lee, Mea-young Chang
Clin Exp Pediatr. 2016;59(4):165-173.   Published online April 30, 2016
Purpose

To identify the effects of modified parenteral nutrition (PN) and enteral nutrition (EN) regimens on the growth of very low birth weight (VLBW) infants.

Methods

The study included VLBW infants weighing <1,500 g, admitted to Chungnam National University Hospital between October 2010 and April 2014, who were alive at the time of discharge. Subjects were divided according to 3 periods: period 1...

Case Report
Neonatology (Perinatology)
Successfully treated infective endocarditis caused by methicillin-resistant Staphylococcus Aureus in extremely low birth weight infant
Sehwa Jung, Kyung Uk Jeong, Jang Hoon Lee, Jo Won Jung, Moon Sung Park
Clin Exp Pediatr. 2016;59(2):96-99.   Published online February 29, 2016

Survival rates of preterm infants have improved in the past few decades, and central venous catheters play an important role in the intensive medical treatment of these neonates. Unfortunately, these indwelling catheters increase the risk of intracardiac thrombosis, and they provide a nidus for microorganisms during the course of septicemia. Herein, we report a case of persistent bacteremia due to...

Original Article
Thyroid dysfunction in very low birth weight preterm infants
Ji Hoon Lee, Sung Woo Kim, Ga Won Jeon, Jong Beom Sin
Clin Exp Pediatr. 2015;58(6):224-229.   Published online June 22, 2015
Purpose

Thyroid dysfunction is common in preterm infants. Congenital hypothyroidism causes neurodevelopmental impairment, which is preventable if properly treated. This study was conducted to describe the characteristics of thyroid dysfunction in very low birth weight infants (VLBWIs), evaluate risk factors of hypothyroidism, and suggest the reassessment of thyroid function with an initially normal thyroid-stimulating hormone (TSH) as part of a newborn...

Postnatal weight gain in the first two weeks as a predicting factor of severe retinopathy of prematurity requiring treatment
Jongmoon Kim, Jang Yong Jin, Sung Shin Kim
Clin Exp Pediatr. 2015;58(2):52-59.   Published online February 28, 2015
Purpose

This study aimed to investigate the relative weight gain at 2-week intervals up to 6 weeks after birth to predict retinopathy of prematurity (ROP) requiring treatment among very low birth weight infants.

Methods

A total of 211 preterm infants with birth weights <1,500 g and gestational age <32 weeks were retrospectively reviewed. The main outcome was the development of ROP requiring treatment....

Analysis of the association between necrotizing enterocolitis and transfusion of red blood cell in very low birth weight preterm infants
Seon-Yeong Bak, Sihyoung Lee, Jae-Hong Park, Kyu-Hee Park, Ji-Hyun Jeon
Clin Exp Pediatr. 2013;56(3):112-115.   Published online March 18, 2013
Purpose

To investigate the association between necrotizing enterocolitis (NEC) and red blood cell transfusions in very low birth weight (VLBW) preterm infants.

Methods

We studied were 180 VLBW preterm infants who were admitted to the neonatal intensive care unit of CHA Gangnam Hospital from January of 2006 to December of 2009. The subjects were divided into 2 groups: an NEC group (greater than...

The control of invasive Candida infection in very low birth weight infants by reduction in the use of 3rd generation cephalosporin
Yu Jin Chang, Il Rak Choi, Won Sub Shin, Jang Hoon Lee, Yun Kyung Kim, Moon Sung Park
Clin Exp Pediatr. 2013;56(2):68-74.   Published online February 25, 2013
Purpose

To evaluate the effectiveness of new management policies on the incidence of invasive Candida infections

Methods

This observational study involved a retrospective analysis of the patients' medical records. In total, 99 very low birth weight infants, who were admitted to the neonatal intensive care unit at Ajou University Hospital from January 2010 to December 2011, were enrolled for the study. Period I,...

Effect of early postnatal neutropenia in very low birth weight infants born to mothers with pregnancy-induced hypertension
Yang Hee Park, Gyung Min Lee, Jung Min Yoon, Enn Jung Cheon, Kyung Ok Ko, Yung Hyuk Lee, Jae Woo Lim
Clin Exp Pediatr. 2012;55(12):462-469.   Published online December 20, 2012
Purpose

In this study, we aimed to investigate the perinatal clinical conditions of very low birth weight (VLBW) infants born to mothers with pregnancy-induced hypertension (PIH) focusing on the effects of early postnatal neutropenia.

Methods

We reviewed the medical records of 191 VLBW infants who were born at Konyang University Hospital, between March 2003 and May 2011. We retrospectively analyzed the clinical characteristics...

Review Article
The changing trends in live birth statistics in Korea, 1970 to 2010
Jae Woo Lim
Clin Exp Pediatr. 2011;54(11):429-435.   Published online November 30, 2011

Although Korean population has been growing steadily during the past four decades, the nation is rapidly becoming an aging society because of its declining birth rate combined with an increasing life expectancy. In addition, Korea has one of the lowest fertility rates in the world due to fewer married couples, advanced maternal age, and falling birth rate. The prevalence of...

Original Article
Outcomes of small for gestational age micropremies depending on how young or how small they are
Hee Joon Yu, Eun Sun Kim, Jin Kyu Kim, Hye Soo Yoo, So Yoon Ahn, Yun Sil Chang, Won Soon Park
Clin Exp Pediatr. 2011;54(6):246-252.   Published online June 30, 2011
Purpose

The outcomes of small for gestational age (SGA) infants especially in extremely low birth weight infants (ELBWIs) are controversial. This study evaluated the mortality and morbidity of ELBWIs, focusing on whether or not they were also SGA.

Methods

The medical records of 415 ELBWIs (birth weight <1,000 g), who were inborn and admitted to the Samsung Medical Center neonatal intensive care unit...

A study on the measurement of the nucleated red blood cell (nRBC) count based on birth weight and its correlation with perinatal prognosis in infants with very low birth weights
Tae Hwan Kil, Ji Yeon Han, Jun Bum Kim, Gyeong Ok Ko, Young Hyeok Lee, Kil Young Kim, Jae Woo Lim
Clin Exp Pediatr. 2011;54(2):69-78.   Published online February 28, 2011
Purpose

The aim of this study was conducted to investigate the mean nRBC count in very low births weight infants (VLBWIs) and to determine the usefulness of the nRBC as an independent prognostic factors of perinatal complications in VLBWIs.

Methods

This study was conducted on 112 VLBWIs who were hospitalized in the neonatal intensive care unit (NICU) of the author's hospital within the...

Case Report
Testicular torsion in the inguinal region in an extremely low birth weight infant
Yu Jin Jung, Jae Min Chung
Clin Exp Pediatr. 2010;53(9):852-854.   Published online September 13, 2010

Testicular torsion is rare in newborn infants. However, its frequency has increased, most of which are reported in full-term infants. We diagnosed and treated testicular torsion in an extremely low birth weight infant (ELBWI). A 2×2 cm red mass was palpable in the left groin of a 24-week-old, 745 g, male newborn at 23 days of age. Left testicular torsion...

Original Article
Effect of severe neonatal morbidities on long term outcome in extremely low birthweight infants
Kyo Yeon Koo, Jeong Eun Kim, Soon Min Lee, Ran Namgung, Min Soo Park, Kook In Park, Chul Lee
Clin Exp Pediatr. 2010;53(6):694-700.   Published online June 23, 2010
Purpose

To assess the validity of individual and combined prognostic effects of severe bronchopulmonary dysplasia (BPD), brain injury, retinopathy of prematurity (ROP), and parenteral nutrition associated cholestasis (PNAC).

Methods

We retrospectively analyzed the medical records of 80 extremely low birthweight (ELBW) infants admitted to the neonatal intensive care unit (NICU) of the Severance Children's Hospital, and who survived to a postmenstrual age of...

Effect of SynagisⓇ (palivizumab) prophylaxis on readmission due to respiratory syncytial virus in very low birth weight infants
Soo Kyoung Park, Yu Jin Jung, Hye Soo Yoo, So Yoon Ahn, Hyun Joo Seo, Seo Heui Choi, Myo Jing Kim, Ga Won Jeon, Soo Hyun Koo, Kyung-Hoon Lee, Yun Sil Chang, Won Soon Park
Clin Exp Pediatr. 2010;53(3):358-363.   Published online March 15, 2010
Purpose : The aim of this study was to determine the efficacy of SynagisⓇ (palivizumab) in reducing the respiratory syncytial virus (RSV) readmission rate in very low birth weight infants (VLBWI ) and the subgroup that showed the most effective vaccination. Methods : We enrolled 350 VLBWI who had been discharged alive from the neonatal intensive care unit of Samsung Medical...
Case Report
High-dose caspofungin salvage in a very-low-birth-weight infant with refractory candidemia
Eun Sun Seo, Geun Hwa Park, Sung Mi Kim, Hye An Jung, Byoung Kuk Kim
Clin Exp Pediatr. 2010;53(2):239-243.   Published online February 15, 2010
Candidiasis is one of the most common causes of late-onset infection among very-low-birth-weight infants (VLBW) in most neonatal intensive care units and is associated with significant morbidity and mortality. Standard therapy consists of the administration of amphotericin B, amphotericin B complex, and fluconazole. In many cases, candidiasis is not easily eradicated, despite the administration of these drugs. We report our...
Original Article
Analysis of prognostic factors of laparotomy for necrotizing enterocolitis in extremely low birth weight infants
Jin Kyu Kim, Yi Sun Kim, Hye Soo Yoo, So Yoon Ahn, Hyun ju Seo, Seo Heui Choi, Soo Kyung Park, Yu Jin Jung, Myo Jing Kim, Ga Won Jeon, Soo Hyun Koo, Kyung-Hoon Lee, Yun Sil Chang, Won Soon Park
Clin Exp Pediatr. 2010;53(2):167-172.   Published online February 15, 2010
Purpose : With improved survival of extremely low birth weight infants (ELBWI), there is an increase in the incidence of necrotizing enterocolitis (NEC) requiring laparotomy, and the risk of morbidity and mortality in these ELBWI is increased. Thus, we determined the prognostic factors in ELBWI who underwent laparotomy for NEC. Methods : We retrospectively reviewed the medical records of 35 ELBWI...
Magnetic resonance imagining findings of the white matter abnormalities in the brain of very-low-birth-weight infants
Jae Hyuk Choi, Young Pyo Chang
Clin Exp Pediatr. 2009;52(10):1127-1135.   Published online October 15, 2009
Purpose : To observe the abnormal white matter findings on the magnetic resonance imaging (MRI) scans of very-low- birth-weight (VLBW) infant brains at term-equivalent age and to determine the clinical risk factors for the development of periventricular leukomalacia (PVL). Methods : In all, MRI was performed in 98 VLBW infants and the white matter abnormalities were observed. Clinical risk factors...
Case Report
Postnatal cytomegalovirus infection in an extremely premature infant transmitted via breast milk: A case report
Ji Hye Kim, Eun-Jin Chung, Hyun Kyung Park, Soo Ji Moon, Su-Mi Choi, Sung Hee Oh
Clin Exp Pediatr. 2009;52(9):1053-1058.   Published online September 15, 2009
Cytomegalovirus (CMV) is one of the most commonly encountered viral pathogens in newborn infants and is found in 0.3-2.4% of all live births. It has been demonstrated that 40-96% of seropositive mothers shed the virus via their breast milk. Breast milk containing CMV can cause almost one-third of CMV infections occurring in infants. A case of postnatal CMV infection in...
Original Article
Changes in the outcomes of neonatal intensive care unit at a single center over 12 years
Hyun-Hee Lee, Tae-Yeon Kim, Seon-Hee Shin, Tae-Jung Sung
Clin Exp Pediatr. 2009;52(8):881-887.   Published online August 15, 2009

Purpose:The survival rate of very low birth weight infant (VLBWI) had increased as a result of advances in neonatal intensive care. We evaluated the changes in outcomes of VLBWI who admitted to the neonatal care unit of Hallym University Kangnam Sacred Heart Hospital. Methods:Retrospective review of 339 VLBWI who were born from 1st January 1997 to 31th December 2008 were performed. Outcomes including survival...
Clinical course and prognosis of hemodynamically significant congenital heart defects in very low birth weight infants
Hye Soo Yoo, Ji Eun Kim, Soo Kyoung Park, Hyun Ju Seo, Yoo Jin Jeong, Seo Heui Chio, Soo In Jeong, Sung Hoon Kim, Ji Hyuk Yang, June Huh, Yun Sil Chang, Tae Gook Jun, I Seok Kang, Won Soon Park, Pyo Won Park, Heung Jae Lee
Clin Exp Pediatr. 2009;52(4):481-487.   Published online April 15, 2009
Purpose : This study investigated the clinical course and prognostic factor of very low birth weight infants (VLBWI) with hemodynamically significant congenital heart defects (CHDs). Methods : Medical records of 1,098 VLBWI with birth weight <1,500 g who had been admitted to the neonatal intensive care unit of Samsung Medical Center from October 1994 to December 2007 were reviewed retrospectively. The...
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