• Neonatal Medicine
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• 제16권1호
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• pp.36-46
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• 2009

목적 : 본 저자들은 국내 57개 병원을 대상으로 2007년 한 해 동안 원내출생아의 특성과 분포 및 신생아 중환자실 입원 환자의 특성과 분포, 그리고 사망률을 조사하였다. 방법 : 2008년 3월 신샹아 중환자실을 갖춘 곳 중 전국 57개 개 병원으로부터 2007년 한해 동안 발생하였던 신생아 출생 및 사망에 관한 설문을 보내고 회신을 받아 그 결과를 분석하였다. 그 내용에는 1) 원내 총 출생아의 재태기간별, 출생체중별 분포, 2) 신생아중환자실 입원 환자의 재태기간별, 출생체중별 분포 및 사망률이 포함되어 있었으며, 이 결과를 1996년 및 2002년에 조사되었던 한국의 결과와 비교하였다. 결과 : 총 40,433의 신생아 원내출생이 57개 병원으로부터 조사되었으며, 미숙아, 만삭아, 과숙아는 각각 24.2%, 75.6%, 0.2%의 출생빈도를 차지하였다. 또한, 저체중 출생아, 정상체중아, 과체중아는 각각 22.0%, 74.6%, 3.4%로 조사되었는데, 특히 국소 저체중출생아와 초극소 저체중출생아는 각각 4.6%와 1.7%이었다. 2007년 한 해 동안 전국 57개 병원의 신생아 중환자실에서 입원치료를 받은 환자의 분포를 보면, 재태기간에 따라 조사된 총 인원수는 21,957명, 출생체중에 따라 조사된 총 인원수는 21,356명으로 조사되었다. 이들의 사망률은 미숙아, 만삭아, 과숙아에서 가각 4.5%, 0.7%, 3.7%이었고, 특히 재태기간 32주 미만에서는 11.3%, 보다 작은 재태기간 28주 미만에서는 26%의 높은 사망률을 보이고 있었다. 1996년과 2002년의 국내 자료와 비교하여 보면, 미숙아, 저체중출생아, 초극소 저체중출생아의 출생수는 현저히 증가하고 있었으며, 이들의 사망률은 감소하는 양상을 확인할 수 있었다. 결론 : 본 저자들은 과거 1996년과 2002년의 국내 조사 결과와 2007년의 본 연구 결괄ㄹ 비교해 보았을 때 미숙아, 저체중출생아와 초극소 저체중츨생아의 빈도가 증가하고 있으며, 이들의 사망률은 현저히 감소하고 있음을 확인하였다. 비록 한국 미숙아 진료의 결과가 개선되고 있는 것으로 조사되었으나, 아직도 초미숙아의 사망률은 높기 때문에 이들의 치료에 보다 많은 노력을 기울여야 할 것으로 생각된다.

• 한국인구학
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• 제15권2호
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• pp.15-59
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• 1992

After world war II Japanese life expectancy has been improved remarkably, and reached the highest level in the world around late 1970's. The life expectancy of Korean has also shown tremendous improvement in recent years with about 20 year's gap from the Japanese. The reason of rapid improvement of life expectancy can be explained by changes in the structure of cause of death due to health system, living standard, social welfare, health behavior of individuals and so on. Korean in Japan is placed under different situations from both Korean in Korea and Japanese in these regards, and expected to show different picture of cause of death pattern. The objective of this study is the comparision of changing patterns of cause of death of three population groups, Korean in Japan, Korean in Korea and Japanese, and to investigate the reasons which effect to the structural difference of mortality cause with special emphasis on health ecological aspects. One of the major limitations of the Korean causes of death statistics is the under-registration which ranges about 10% of the total events, and inaccuracy of the exact cause of death. Some 20% of registered deaths were unable to classify by ICD. However, it is concluded that the Korean data are evaluated as sufficient to stand for over-viewing of trends of cause of death pattern. The evaluation is done by comparing data from registration and field survey over the same population sample. Population data of Korean in Japan differ between two sources of data; census and foreigner's registration. Correction is done by life table method under the assumption that age-specific mortality pattern would accord with that of the Japanese. The crude death rate was lowest among Korean in Japan, 5.7 deaths per 1,000 population in 1965. The crude death rates of Korean in Japan and Japanese are increasing recently influenced by age structure while Korean in Korea still shows decreasing tendency. The adjusted death rate is lowest among Japanese, followed by Korean in Japan, and Korean in Korea. The leading causes of death of Korean in Korea until 1960's was infectious diseases including pneumonia and tuberculosis. The causes of death structure changed gradually to accidents, neoplasm, hypertensive disease, cerebro-vascular disease in order. The main difference in cause of death between Korean and Japanese if high rate of liver diseases and diabetes for both Korean in Japan and Korea. A special feature of cause of death among Korean in Korea is remakably high rate of hypertensive disease, which is assumed to be caused by physicians tendency in choosing diagnostic categories. The low ischemic heart disease and high vasculo-cerebral disease are the distinctive characteristic of the three population groups compared to western countries. Specific causes of death were selected for detailed sex, age and ethnic group comparisons based on their high death rates. Cancer is the cause of death which showed most dramatical increase in all three population groups. In Korea 20.1% of all death were caused by cancer in 1990 compared with 10.5% in 1981. Cancer of the liver is the leading cause of cancer death among Korean in Japan for both sexes, followed by cancer of the lung and cancer of the stomach, while that of Korean in Korea is cancer of the stomach, followed by cancer of the liver and cancer of the lung for male. Causes of infant mortality were examined among the three population groups since 1980 on yearly bases. For both Japanese and Korean in Japan, leading cause of death ranks as conditions originating in the perinatal period, congenital anomalies, accidents and other violent causes. Trends since 1980 for these two population groups in the leading cause of infant mortality showed no changes. On the contrary, significant changes in leading cause of death structure in Korea were observed : the ranking of leading cause of death in 1981 were congenital asnomalies, pneumonia bronchitis, infectious disease, heart disease, conditions originating in the perinatal period, accident and other violent causes ; in 1990 the ranking shifted to congenital anomalies, accident, pneumonia bronchities, conditions originating in the perinatal period, infectious disease. The mortality rate by congenital anomalies in Korea continuously grew than any other causes. Larger increase ocurred during the 1990's

• Clinical and Experimental Pediatrics
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• 제58권8호
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• pp.288-293
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• 2015

Purpose: In this study, we aimed to review the clinical presentation of preterm infants with gastrointestinal perforations and compare the clinical features of gastric perforation with other intestinal perforations. Methods: The medical records of preterm neonates with pneumoperitoneum, admitted to the neonatal intensive care unit (NICU) between January 1994 and December 2013, were retrospectively reviewed. Results: Twenty-one preterm infants underwent exploratory laparotomy to investigate the cause of the pneumoperitoneum. The sample consisted of five patients (23.8%) with gastric perforation and 16 patients (76.2%) with intestinal perforation. No statistical differences were found in the birth history and other perinatal factors between the two groups. Underlying necrotizing enterocolitis, bilious vomiting, and paralytic ileus preceding the perforation were statistically more common in the intestinal perforation group. All preterm infants with gastric perforation survived to discharge; however, six preterm infants with intestinal perforation expired during treatment in the NICU. In the gastric perforation group, sudden pneumoperitoneum was the most common finding, and the mean age at diagnosis was $4.4{\pm}1.7days$ of life. The location and size of the perforations varied, and simple closure or partial gastrectomy was performed. Conclusion: Patients with gastric perforation did not have a common clinical finding preceding the perforation diagnosis. Although mortality in previous studies was high, all patients survived to discharge in the present study. When a preterm infant aged less than one week presents with sudden abdominal distension and pneumoperitoneum, gastric perforation should first be excluded. Prompt exploratory laparotomy will increase the survival rates of these infants.

• Neonatal Medicine
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• 제16권2호
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• pp.121-130
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• 2009

Over the past 20 years, neonatal mortality rates for preterm infants, particularly those born extremely preterm and with a very low birth weight, have decreased steadily. As more very immature preterm infants survive, provision of enteral feeding has become a major focus of concern. According to many experts on neonatal nutrition, the goal for the nutrition of preterm infants should be to achieve a postnatal growth rate approximating that of a normal fetus of the same gestational age. Total parenteral nutrition for maintaining nutritional integrity is mandatory before successful transition to enteral feeding. Early initiation of trophic enteral feeding is vital for postnatal adaptation. Recently published randomized controlled trials provide no evidence to support the practice of postponing enteral feeding to reduce the incidence of necrotizing enterocolitis. Early trophic feeding yields demonstrable benefits and there is currently no evidence of any adverse effects following early feeding. Preterm milk from the infant's own mother is the milk of choice, which can always be supplemented with a human milk fortifier. Here we review over 50 randomized controlled trials and over seven systematic reviews published on neonatal parenteral and enteral feeding of preterm infants. Neonatologists must make use of the evidence from these studies as a reference for feeding protocols for preterm infants in their NICUs are to be based.

• International Journal of Reliability and Applications
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• 제3권1호
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• pp.1-16
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• 2002

In reliability engineering, the bathtub-shaped hazard rates play an important role in survival analysis and many other applications as well. For the bathtub-shaped, initially the hazard rate decreases from a relatively high value due to manufacturing defects or infant mortality to a relatively stable middle useful life value and then slowly increases with the onset of old age or wear out. In this paper, we present a new two-parameter lifetime distribution function, called the Loglog distribution, with Vtub-shaped hazard rate function. We illustrate the usefulness of the new Vtub-shaped hazard rate function by evaluating the reliability of several helicopter parts based on the data obtained in the maintenance malfunction information reporting system database collected from October 1995 to September 1999. We develop the S-Plus add-in software tool, called Reliability and Safety Assessment (RSA), to calculate reliability measures include mean time to failure, mean residual function, and confidence Intervals of the two helicopter critical parts. We use the mean squared error to compare relative goodness of fit test of the distribution models include normal, lognormal, and Weibull within the two data sets. This research indicates that the result of the new Vtub-shaped hazard rate function is worth the extra function-complexity for a better relative fit. More application in broader validation of this conclusion is needed using other data sets for reliability modeling in a general industrial setting.

• 대한기관식도과학회지
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• 제13권1호
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• pp.29-32
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• 2007

Background and Objectives: Improvements in the fields of neonatology and surgical subspecialities make tracheotomy possible to the younger population. But complication rates for infantile tracheotomy are significantly higher than that for the other pediatric tracheotomy. This study was designed to present our 9-year experiences of infantile tracheotomy and to evaluate the effect of several factors of complications. Materials and Methods: From 1996 through 2004, 60 tracheotomies were performed. Charts were reviewed with respect to indications for tracheotomy, underlying diseases, success rate in decannulation and length of support time until decannulation, complication and mortality rate. Results: There were 41 male patients and 19 female patients. Ventilatory support for neurological impairment(38.3%) was the leading indication for tracheotomy, followed by subglottic stenosis(36.7%), laryngomalacia(13.3%). Decannulation was accomplished in 60.0% of infants with an average of 56.5momths with tracheotomy. Complications occurred in 43.3%. There was one tracheotomy-related mortality in case of tracheal atresia. Most common complication was subglottic stenosis. Conclusion: Infantile tracheotomy had significant morbidities and its outcomes are thought to be usually related to the underlying disease and age. To prevent complication, early decannulation is advisable, and for long-term tracheotomy patients, regulation of reflux and infection may be necessary.

• Pediatric Infection and Vaccine
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• 제15권1호
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• pp.30-35
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• 2008

목 적 : 소아에서 치명적인 뇌농양의 선행요인 및 사망률 등 임상 양상에 대하여 알아보고자 하였다. 방 법 : 1997년부터 2006년까지 세브란스병원에서 뇌농양으로 진단된 만 18세 미만의 소아 및 청소년을 대상으로 임상 소견, 검사 결과 및 치료 경과 등을 후향적으로 조사하였다. 결 과 : 최근 10년간 뇌농양으로 진단된 환아는 총 27명이었으며, 이 중 6명(22%)이 치료 중 사망하였고 생존자 중 8명(38%)은 신경학적 후유증이 남았다. 전체 뇌농양 환아 중 1세 미만의 영아가 총 8명(30%)이었으며 영아의 사망률은 38%였다. 뇌농양의 발생부위는 다발성 7례(26%), 전두엽과 두정엽이 각각 6례, 측두엽 5례 순이었으며, 원인균이 분리된 15례 중 사슬알균 5례(33%), 포두알균 4례, 그람음성 장내간균 3례, 진균 2례, 결핵균 1례 등이 포함되었다. 선행요인에는 신경외과술 8례(30%), 선천성 심질환 4례, 중이염과 부비동염 각각 1례, 면역억제치료 1례 등이 있었다. 증상으로는 발열(74%), 두통(37%), 오심/구토, 의식저하 순이었으며 발열, 두통 및 국소적 신경증상의 주요 3증상을 보이는 환아는 2례(7%)에 불과하였다. 전체 뇌농양 환아 중 1세미만의 영아에서 다발성 발생(63%, P=0.011) 및 신경학적 후유증이나 사망의 비율(88%, P=0.033)이 더 높았다. 결 론 : 비교적 증상이 뚜렷하지 않은 영아에서 뇌농양에 의한 신경학적 후유증과 사망률이 더 높으며 따라서 영아에 대한 보다 적극적인 진단과 조기치료가 필요할 것으로 사료된다.

• Clinical and Experimental Pediatrics
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• 제54권6호
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• pp.260-266
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• 2011

Purpose: Infantile hepatic hemangioendothelioma (IHHE) is the most common type of hepatic vascular tumor in infancy. We conducted this study to review our clinical experience of patients with IHHE and to suggest management strategies. Methods: We retrospectively analyzed the medical records of 23 IHHE patients (10 males, 13 females) treated at the Asan Medical Center between 1996 and 2009. Results: Median age at diagnosis was 38 days (range, 1 to 381 days). Seven patients (30%) were diagnosed with IHHE based on sonographically detected fetal liver masses, 5 (22%) were diagnosed incidentally in the absence of symptoms, 5 (22%) had congestive heart failure, 3 (13%) had skin hemangiomas, 2 (9%) had abnormal liver function tests, and 1 (4%) had hepatomegaly. All diagnoses were based on imaging results, and were confirmed in three patients by histopathology analysis. Six patients were observed without receiving any treatment, whereas 12 received corticosteroids and/or interferonalpha. One patient with congestive heart failure and a resectable unilobar tumor underwent surgical resection. Three patients with congestive heart failure and unresectable tumors were managed by hepatic artery embolization with/without medical treatment. At a median follow-up of 29 months (range, 1 to 156 months), 21 (91%) patients showed complete tumor disappearance or >50% decrease in tumor size. One patient died due to tumor-related causes. Conclusion: IHHE generally has a benign clinical course with low morbidity and mortality rates. Clinical course and treatment outcome did not differ significantly between medically treated and non-treated groups. Surgically unresectable patients with significant symptoms may be treated medically or with hepatic artery embolization.

• Clinical and Experimental Pediatrics
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• 제52권3호
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• pp.295-302
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• 2009

목 적 : 단일 기관에서 경험한 소화기계의 수술적 치료를 받은 극소 저체중 출생아들의 임상적 특성을 연구하였다. 방 법 : 1994년 11월부터 2007년 2월까지 삼성서울병원 신생아 집중 치료실에 입원하였던 극소 저체중 출생아 총 1,117명에 대해 서혜부 탈장을 제외한 소화기계의 수술적 치료를 받은 군(37명)과 소화기계 수술을 받지 않은 군(1,080명)으로 나누어 이들에 대해 의무기록을 통해 후향적으로 조사 분석하였다. 결 과 : 극소 저체중 출생아 37명(3.3%)이 소화기계 수술적 치료를 받았으며. 이들은 소화기 수술을 받지 않은 군(n=1,080)에 비해 재태 연령($27^{+6}2^{+3}$ vs. $28^{+5}{\pm}$2^{+6}$)과 출생 체중(979${\pm}$241 g vs. 1071${\pm}$271 g)이 더 작았다. 사망률은 소화기계 수술을 받은 군에서 유의하게 높았다(28% vs. 15%, P<0.001). 또한 생존한 환자 분석에서 담즙 정체증, 미숙아 망막증, 뇌백질 연화증는 소화기계 수술을 받은 VLBWI에서 유의하게 높았으나 기관지폐이형성증에서 유의한 차이는 없었다. 수술 적응증으로는 국소성 장천공이 가장 많았고 괴사성 장염에 비해 좋은 예후를 보였다. Period I (1994-2000)과 Period II (2001-2007. 2) 두 기간 동안 ELBWI의 소화기 수술이 크게 증가하였고 생존율이 향상되었다. 결 론 : 극소 저체중 출생아에서 소화기계 수술적 치료는 사망률과 이환율 증가와 관계된 중요한 인자이다. 미숙아 치료의 질적 향상을 위하여 소화기계 수술적 치료의 사망률과 이환율을 줄이기 위한 노력은 필수적이며 따라서 이들에 대한 좀 더 체계적 연구가 필요하다.

• Journal of Preventive Medicine and Public Health
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• 제5권1호
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• pp.57-95
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• 1972

This study was conducted to assess the effectiveness of service by maternity aids concerning maternal and child health in improving simultaneously infant mortality, contraception and vital registration among expectant mothers in rural Korea, where there is less apportunity for maternal and child health care. It is unrealistic to expect to solve this problem in rural Korea through professional persons considering the situation of medical facilities and the socioeconomic condition of residents. So, we intended to adopt a system of services by maternity aids who were educated formally among indigenous women. After the women were trained in maternal and child health, contraception, and registration for a short period, they were assigned as a maternity aids to each village to help with various activities concerning maternal and child health, for example, registration of pregnant women, home visiting to check for complications, supplying of delivery kits, attendance at delivery, persuasion of contraception, and invitation for registration and so on. Mean-while, four researchers called on the maternity aids to collect materials concerning vital events, maternal child health, contraception and registration, and to give further instruction and supervision as the program proceeded. A. Changes of women's attitude by services of maternity aid. Now, we examined to what extent' such a service system to expectant mothers affected a change in attitude of women residing in the study area as compared to women of the control area. 1) In the birth and death places, there were no changes between last and present infants, in study or control area. 2) In regard to attendants at delivery, there were no changes except for a small percentage of attendance (8%) by maternity aid in study area. But, I expect that more maternity sids could be used as attendants at delivery if they would be trained further and if there was more explanation to the residents about such a service. 3) Considering the rate of utilization of sterilized delivery kit, I am sure that more than 90 percent would be used if the delivery kit were supplied in the proper time. There were significant differences in rates between the study and the control areas. 4) Taking into consideration the utilization rate of the clinic for prenatal care and well baby care, if suck facilities were installed, it would probably be well utilized. 5) In the contraception, the rate of approval was as high as 89 percent in study area as compared to 82 percent in the control area. 6) Considering the rate of pre-and post-partum acceptance on contraception were as much as 70 percent or more, if motivation to use contraception was given to them adequately, the government could reach the goals for family planning as planned. 7) In the vital registration, the rate of birth registration in the study area was some what improved compared to that of the control area, while the rate of death registration was not changed at all. Taking into account the fact that the rate of confirmation of vital events by maternity aids was remarkably high, if the registration system changed to a 'notification' system instead of formal registration ststem, it would be improved significantly compared to present system. B. Effect of the project Thus, with changes in the residents' attitude, was there a reduction in the infant death rate? 1) It is very difficult problem to compare the mortality of infants between last and present infants, because many women don't want to answer accurately about their dead children especially the infants that died within a few days after birth. In this study the data of present death comes from the maternity aides who followed up every pregnancy they had recorded to see what had happened. They seem to have very reliable information on what happened in first few weeks with follow up visitits to check out later changes. From these calculaton, when we compared the rate of infant death between last and present infant, there was remarkable reduction of death rate for present infant compare to that of last children, namely, the former was 30, while the latter 42. The figure is the lowest rate that I have ever heard. As the quality of data we could assess by comparing the causes of death. In the current death rate by communicable disease was much lower compare to the last child especially, tetanus cases and pneumonia. 2) Next, how many respondents used contraception after birth because of frequent contact with the maternity aid. In the registered cases, the respondents showed a tendency to practice contraception at an earlier age and with a small number of children. In a comparison of the rate of contraception between the study and the control area, the rate in the former was significantly higher than that of the latter. What is more, the proportion favoring smaller numbers of children and younger women rose in the study area as compared to the control area. 3) Regarding vital registration, though the rate of registration was gradually improved by efforts of maternity aid, it would be better to change the registration system. 4) In the crude birth rate, the rate in the study area was 22.2 while in the control area was 26.5. Natural increase rate showed 15.4 in the study area, while control area was 19.1. 5) In assessment of the efficiency of the maternity aids judging by the cost-effect viewpoint, the workers in the Medium area seemed to be more efficiency than those of other areas.