• Journal of Yeungnam Medical Science
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• 제11권1호
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• pp.160-166
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• 1994

1990년 1월부터 1993년 12월까지 영남대학교 의과대학 부속병원에서 출생한 적정체중아(appropriate for gestational age infants) 207명을 대상으로 중앙 상완위 및 두위를 측정하여 관찰한 결과 재태 연령의 증가에 따라 중앙 상완위(y=0.3181x-2.2069, r=0.81 p<0.001)와 중앙 상완위 대두위 비(y=0.0049x+0.1128, r=0.62, p<0.001)는 직선적인 증가를 보였으며 이를 기초로 작성된 재태 연령에 대한 표준 곡선은 향후 신생아의 발육 상태를 평가하는 참고치로서 활용될 수 있을 것으로 생각된다.

• Clinical and Experimental Pediatrics
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• 제63권8호
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• pp.284-290
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• 2020

Korea currently has the world's lowest birth rate but a rapidly inreasing number of preterm infants. The Korean Neonatal Network (KNN), launched by the Korean Society of Neonatology under the support of Korea Centers for Disease Control, has collected population-based data for very low birth weight infants (VLBWIs) born in Korea since 2013. In terms of the short-term outcomes of VLBWIs born from 2013 to 2016 registered in the KNN, the survival rate of all VLBWIs was 86%. Respiratory distress syndrome and bronchopulmonary dysplasia were observed in 78% and 30% of all VLBWIs, respectively. Necrotizing enterocolitis occurred in 7%, while 8% of the VLBWIs needed therapy for retinopathy of prematurity in the neonatal intensive care unit (NICU). Sepsis occurred in 21% during their NICU stay. Intraventricular hemorrhage (grade ≥III) was diagnosed in 10%. In terms of the long-term outcomes for VLBWIs born from 2013 to 2014 registered in the KNN, the post-discharge mortality rate was approximately 1.2%-1.5%, mainly owing to their underlying illness. Nearly half of the VLBWIs were readmitted to the hospital at least once in their first 1-2 years of life, mostly as a result of respiratory diseases. The overall prevalence of cerebral palsy was 6.2%-6.6% in Korea. Bilateral blindness was reported in 0.2%-0.3% of VLBWIs, while bilateral hearing loss was found in 0.8%-1.9%. Since its establishment, the KNN has published annual reports and papers that facilitate the improvement of VLBWI outcome and the formulation of essential healthcare policies in Korea.

• Neonatal Medicine
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• 제28권1호
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• pp.29-35
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• 2021

Purpose: Intussusception is the most common cause of bowel obstruction in children; however, it is rarely diagnosed in newborn infants. This study aimed to describe the clinical features of intussusception in newborn infants. Methods: Medical records of eight patients diagnosed with intussusception during the newborn period at Ulsan University Hospital between March 2007 and March 2020 were retrospectively reviewed. Results: Among the eight cases, two occurred in the intrauterine period and six occurred in the postnatal period. Intrauterine intussusception presented with symptoms of bowel obstruction within 1 to 2 days after birth, and ileal atresia was diagnosed simultaneously through exploratory laparotomy. All the postnatal patients were extremely low birth weight infants (median gestational age and birth weight: 25⁺⁶ weeks and 745 g, respectively). Four cases were diagnosed preoperatively using abdominal ultrasonography. One patient was diagnosed by exploratory laparotomy because the clinical symptoms were nonspecific and difficult to differentiate from those of necrotizing enterocolitis, a more prevalent complication in preterm infants. The site of intussusception in all six patients was the small bowel. Meckel's diverticulum (one case) and meconium obstruction (two cases) were found to be the lead point. Conclusion: Neonatal intussusception tends to show different clinical features according to its period of occurrence. Intussusception, especially in preterm infants, has nonspecific clinical features; therefore, clinicians should always be cautious of this disease for its early diagnosis.

• Neonatal Medicine
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• 제17권2호
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• pp.193-200
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• 2010

목적: 초극소 저체중 출생아는 경구수유를 진행하는데 여러가지 어려움을 겪어, 경구수유로의 이행이 늦어진다. 본 연구에 서는 초극소 저체중 출생아 중, 수유 시 산소포화도 저하가 발생하는 군과 산소포화도 저하가 없는 군 사이의 특징을 비교하고, 초극소 저체중 출생아의 경구수유 이행 및 입원기간에 미치는 영향에 대해 알아보았다. 또한 초극소 저체중 출생아에서 구강자극요법을 시행하는 경우, 수유 시 산소포화도 저하와 경구수유 능력의 발달, 입원기간에 미치는 효과를 알아보았다. 방법: 제 1상 연구에서는 2003년 10월부터 2009년 1월까지 서울아산병원 신생아 중환자실에 입원한 125명의 초극소 저체중 출생아를 대상으로 차트 분석을 통한 후향적 연구를 실시하여, 수유 시 산소포화도 저하 여부에 따른 특성, 산소포화도 저하가 경구수유 능력 발달 및 입원기간에 미치는 영향에 대해 알아보았다. 제 2상 연구에서는 2009년 3월부터 2010년 5월까지 29명의 초극소 저체중 출생아에게 구강자극요법을 시행하며 전향적으로 자료를 수집하였고, 81명의 초극소 저체중 출생아에서 후향적 코호트 연구를 통해 두 그룹을 비교 분석하였다. 결과: 초극소 저체중 출생아의 72.8%에서 수유 시 산소포화도 저하를 보였고. 그 중 37.4%에서 서맥을 동반하였다. 수유 시산소포화도 저하가 발생하는 시점은 평균 58.2일이었고, 당시 평균 175.4 mL의 수유를 하고 있었으며, 대부분 위관영양과 경구수유를 병행하고 있었지만, 36.3%에서는 위관영양만 시행하고 있었다. 수유 시 산소포화도 저하가 발생한 군은 정상군 보다 출생 시 재태연령이 낮고, 5분 아프가 점수가 낮았으며, 위식도 역류 및 상인두 부조화가 유의하게 많았다. 또한 기관지폐이형성이 있는 초극소 저체중 출생아에서 수유 시 산소포화도의 저하가 발생할 확률은 19배 증가하였다. 수유 시 산소포화도 저하가 있는 군은 경구수유로 완전히 이행하는 시기가 늦었으며, 입원기간도 길었다. 위 결과를 토대로, 초극소 저체중 출생아에서 구강자극요법을 시행하였을 때 대조군에 비해 경구수유 시작시기 및 경구수유로 완전히 이행한 시기가 빨랐으며, 입원기간이 단축되었다. 결론: 초극소 저체중 출생아에서 구강자극요법은 경구수유능력 발달에 긍정적인 효과가 있으며 입원기간을 단축하는데 도움이 된다.

• Neonatal Medicine
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• 제16권1호
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• pp.47-54
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• 2009

목적 : Urea plasma urealyticum (U. urealyticum) 집락은 조산아의 주산기 사망, 폐렴, 패혈증 및 기관지폐 형성이상과 관련이 있는 것으로 알려져 왔다. 출생 시 하부기도의 U. urealyticum 집락 여부가 조산아의 기관지폐 형성이상과 조발형 패혈증의 발생과 관련이 있는지 알아보기 위하여 본 연구를 시도하였다. 방법 : 2006년 9월부터 2008년 12월까지 분당차병원 신생아 집중치료실에 입원하여 인공 환기 치료를 받았던 35주 미만의 미숙아 176례를 대상으로 하였다. U. urealyticum 은 생후 24시간 이내의 기관흡인액을 중합 효소연쇄반응법으로 검사하였다. 기관지폐 형성이상은 Jobe와 Bancalari에 의한 분류법에 따라 정의하였고, 경증, 중등도, 중증으로 분류하였다. 결과 : 176례 중 37례에서 U. urealyticum 양성으로 21.0%의 양성률을 보였다. U. urealyticum 양성군에 재태연령($29^{+5}{\pm}2^{+5}$주 vs. $30^{+6}{\pm}2^+{-5}$, P=0.013)과 출생체중 (1.39${\pm}$0.44 kg vs. 1.59${\pm}$0.55 kg, P=0.037)이 U. urealyticum 음성군보다 낮았다. 조발형 패혈증(16.2% vs. 6.5%, P=0.045)과 기관지폐 형성이상(45.9% vs. 29.5%, P=0.04)의 발생빈도는 U. urealyticum 양성군에서 유의하게 높았으나, 기관지폐 형성이상의 중증도는 두 군 간의 차이를 보이지 않았다. 재태연령 등의 다양한 변수의 영향을 보정한 분석 결과 U. urealyticum 집락 양성과 조발형 패혈증과 기관지폐 형성이상의 발생사이의 연관성은 관찰되지 않았다. 결론 : 본 연구결과는 출생시 하부 기도의 U. urealyticum 집락이 조산아의 패혈증과 기관지폐이형성증의 발생에 직접적인 관련성은 없음을 시사한다.

• Journal of Yeungnam Medical Science
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• 제16권1호
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• pp.52-59
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• 1999

미숙아의 여러 가지 합병증 중에서도 선생아 호흡 곤란 증후군은 가장 빈도가 높고 사망률도 높은 질병이다. 이제까지 많은 저자들이 자궁내 성장기 동안에 폐 표면 활성제 생성을 증가시킴으로써 신생아 호흡 곤란 증후군을 예방할 수 있는 약제로 corticosteroid에 대한 연구를 하였으나, 산모와 태아 감염에 중요한 위협 요인이 되어 이 약의 사용이 제한적이다. 따라서 steroid의 부작용 때문에 태아의 폐를 성숙시킬 수 있는 ambroxol에 관심을 가지게 되었으며 이에 저자들은 출생 전 산모에게 투여한 ambroxol이 신생아 호흡 곤란 증후군의 발생 빈도에 어떤 영향을 미치는지와 그 부작용에 대해 알아보고자 하였다. 1996년 1월부터 1997년 12월까지 영남대학교 의과대학 부속 병원 산부인과에 입원하였던 36주 이전의 조산이 예견된 산모에게 ambroxol(Mucosolvan$^{(R)}$, Boehringer Ingelheim) 1,000mg을 5% glucose 용액에 녹여 2시간 이상 정주하며 3일에서 5일간 투여하였다. 또한 대조군에서는 생리 식염수를 정주하였다. 조기 분만의 원인이나 대상 환아 평균 재태 연령, 남녀비, 출생 체중과 1, 5분 Apgar 점수가 7점 미만인 미숙아의 수에는 양 군간의 의미있는 차이는 없었다. 그러나 대조군에서는 21명 중 13명에서 신생아 호흡 곤란 증후군이 발생하였고 ambroxol 사용군에서는 21명 중 6명에서 신생아 호흡 곤란 증후군이 발생하여 두 군간에 의미있는 차이가 있었다(p<0.05). 출생 후 산소 치료와 인공 환기를 필요로 했던 경우는 대조군에서는 각각 18, 12명이었고 ambroxol 사용군에서는 각각 9, 8명이었다. 산소치료를 요구된 시간은 ambroxol 군에서 낮았으나 인공 환기가 필요하였던 시간은 ambroxol 군에서 더 길었다. 그 외 미숙아에게 나타난 주산기 합병증의 빈도는 ambroxol 사용군과 대조군을 비교해 보면 두 군이 같거나 ambroxol 군이 더 적었다. Ambroxol 투여 전과 후의 산모의 혈액학적, 생화학적 검사에 의미있는 변화는 없었다. 그리고 ambroxol 사용군에서 산모가 호소하는 부작용으로는 경미한 오심이 3례 있었으나 구토, 두통이나 현기증, 알레르기 반응 등은 나타나지 않았다. 그러므로 본 연구에서는 미숙아 출생 전 산모에게 투여한 ambroxol은 신생아 호흡 곤란 증후군의 발생 빈도를 감소시킨다고 생각되며 이를 위해 산모에게 안전하게 사용할 수 있는 약제로 생각된다.

• Journal of Preventive Medicine and Public Health
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• 제34권4호
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• pp.354-362
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• 2001

Objectives : The aim of this study was to estimate the burden of disease through an analysis of Years of Life Lost due to premature deaths, one component of the Disability-Adjusted Life years (DALY). In addition, the cause of death statistics were adjusted to improve validity, and the results were compared with those of the Global Burden of Disease (GBD). Methods : In closely fellowing the approach taken in the original GBD study, most of the explicit assumptions and the value judgments were not changed. However, the statistics for some problematic concerns such as deaths of infants or those due to senility, were adjusted. Deaths, standard expected years of life lost (SEYLL), and potential years of life lost (PYLL) were computed using vital registration data compiled by the National Statistical Office. Results : The burden for males is 1.8 and 2.3 times higher than that for females, according to SEYLL and PYLL, respectively. The proportions of deaths due to Group I, II, and III causes are 5.4%, 80.4%, and 14.3%, respectively, for PYLL, but in a major shift from Group II to III they are 6.3%, 66.2%, and 27.5%, respectively, for SEYLL. The proportion of Group III causes in Korea, 27.5%, is extremely high when compared to 10.1% for the world, 7.6% for developed countries, and 10.7% for developing countries. Conclusions : Estimation results showed that the total burden due to premature deaths is smaller than that for the entire world but larger than that for developed countries. The disease structure of Korea has changed to resemble that of developed countries. Also, an overly large portion of the total burden in Korea stems from injuries arising from car accidents.

• Advances in pediatric surgery
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• 제16권2호
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• pp.101-107
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• 2010

Herniorrhaphy of Indirect inguinal hernia (IIH) is one of the most frequently performed surgical procedures in children. The overall incidence of inguinal hernias in childhood ranges from 0.8 to 4.4 %. The incidence is up to 10 times higher in boys than girls, especially much higher in premature infants. IIHs in children are basically an arrest of embryologic development rather than an acquired weakness, which explains the increased incidence in premature infants. In normal development, the processus vaginalis closes, obliterating the peritoneal opening of the internal ring between 36th and 40th week of gestation. This process is often incomplete, leaving a small patent processus in many newborns. However, closure continues postnatally, and the rate of patency is inversely proportional to age of the child. The presence of a patent processus vaginalis is a necessary but not sufficient variable in developing a congenital IIH. In other words, all congenital IIHs are preceded by a patent processus vaginalis, but not all patent processus vaginalis go on to become IIHs. The overall incidence of IIH in population is approximately 1 to 2 % and the incidence of a processus vaginalis is approximately 12 to 14%, clinically appreciable IIH should develop in approximately 8 to 12 % of patients with a patent processus vaginalis. Although the classic open inguinal hernia repair remains the gold standard for most pediatric surgeons, laparoscopic repair is being performed in many centers. Like open technique, laparoscopic technique is fundamentally a high ligation of the indirect hernia sac with or without internal ring ligation. The advantages of laparoscopic approach include the ease of examining the contralateral internal ring, the avoidance of access damage to vas and vessels during mobilization of cord, decreased operative time, and an ability to identify unsuspected direct or femoral hernias. Almost all groin hernias in children are IIHs and occur as a result of incomplete closure of processus vaginalis. The treatment is repair by high ligation of hernia sac, which can be done by an open or laparoscopic technique. The contralateral side can be explored by laparoscopy or left alone, open exploration is no longer indicated due to potential risk of infertility.

• Journal of Nutrition and Health
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• 제27권3호
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• pp.215-227
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• 1994

Changes in total lipid content, total cholesterol content and fatty acid composition of preterm milk were investigated during early lactation. Milk samples were collected from Korean mothers of 16 premature(34 to 36 weeks gestation age) infants on day 2 to 5(colostrum) and at 6 weeks(mature) postpartum. We estimated the lipid nutrition of preterm milk by comparing with the lipids of term milk. The total lipid content of preterm colostrum was significantly lower than the lipid content of preterm mature milk(p<0.001). Lipid content, determined gravimetrically in colostrum and matured milk, was 1.50g/이 and 3.2g/dl, respectively. Also the total cholesterol content(mg/dl) in preterm milk tends to increase from 14.16mg/dl to 15.20mg/dl, while the total cholesterol(mg/g lipid) concentration higher significantly in colostrum(12.36mg/g) than in mature(5.73mg/g)(p<0.001). The total unsaturated fatty acid contents in preterm milk were higher in colostrum than in mature milk and the total saturated fatty acids were higher in mature milk. The average DHA contents of colostrum and matured milk was 0.64%, 0.53% and the P/M/S ratio of preterm milk were 0.63 : 1.05 : 1.00, 0.47 : 0.79 : 1.00, respectively. Also, $\omega$6/$\omega$3 ratio of preterm milk were 2.35 in colostrum and 5.81 in mature. Therefore, colostrum in preterm milk contained higher amounts of $\omega$3 PUFA than mature milk. The levels of total lipid in preterm milk were higher than term milk. Also, preterm milk is richer in cholesterol, and long chain polyunsaturated fatty acid than term. It appears that the milk secreted by mothers who delivered prematurely differs from milk in several important respect. These components may serve as precursors for membrane, myelin development in the preterm infants. Therefore, it would be necessary to study further into the machanism of how the gestation age might affect to the lipid composition in human milk. These data may provide a basis for better construction of infant formaulas to provide more adequately for the lipid requirements of the Korean premature infant.

• Clinical and Experimental Pediatrics
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• 제54권2호
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• pp.69-78
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• 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 period from March 2003 to and May 2008. Based on the infants' nucleated red blood cells (nRBC) counts at birth, on the third day after birth, on the seventh day after birth, in the second week after birth, and in the fourth week after birth in the medical records, the correlation between nRBC or absolute nRBC counts with birth weight, gestational age, and other perinatal outcomes were retrospectively investigated. Results: In VLBWIs, their mean nRBC and absolute nRBC counts were showing a gradual decrease after birth, and they were consisteantly kept at low values since one week after and inversely proportional to the birth weights. The mean nRBC counts based on the stage after birth showed a significant correlation with perinatal death, necrotizing enterocolitis, and severe intraventricular hemorrhage. Conclusion: The increase in the nRBC count showed a significant correlation with having a severe intraventricular hemorrhage, necrotizing enterocolitis, and perinatal death in VLBWIs. If an increase or no decrease in the nRBC count after birth is observed, newborninfant care precautions should be required.