No abstract available.
Humans ; Hyalin* ; Hyaline Membrane Disease* ; Infant, Newborn

No abstract available.
Humans ; Infant, Newborn* ; Phototherapy* ; Riboflavin*

The fetal hemoglobin, which is structurally different from adult hemoglobin, has higher affinity for oxygen and higher resistance to denaturation with alkali than adult hemoglobin. Intrauterine growth retarded neonates have higher mortality and morbidity than normal neonates. In this article, to determine the changes of fetal hemoglobin by gestational age in infants appropriate in weight for gestational age (AGA)and to explain the mechanism underlying the increased fetal hemoglobin synthesis in intrauterine growth retarded newborn infants, the proportion of fetal hemoglobin and adult hemoglobin at birth and 1 month of age was checked in 25term infants small for gestational age(TSGA). The results were compared with 50 preterm infants appropriate in weight for gestational age (paga) and 40 term infants appropriate in weight for gestational age (TAGA). The results were as forllows. 1)The decrease of fetal hemoglobin by gestational age in infants of AGA at birth was statistically significant (p<0.01). 2) The fetal hemoglobin at birth was 74.47+/-2.4%n the TSGA group, 78.01+/-5.05% in the PAGA group and 68.32+/-4.84% in the TAGA group. The differnce between each group was statistically significant (p<0.01). 3) The fetal hemoglobin at one month of age was 55.68+/-3.76% in the TSGA group, 35.74 (13.33%in the PAGA group and 59.96+/-5.53% in the TAGA group. The difference between TSGA and TAGA infants was not significant (p>0.05). 4) The decrese rate of fetal hemoglobin between first day and one month of postantal age was 54.2% in the PAGA infants, 25.2% in the TSGA infants and 12.2% in the TAGA infants. 5) The fetal hemoglobin at forty weeks of postconceptional age was 13.20+/-5.09%in the transfused PAGA group, 62.34+/-3.01% in the nontransfused PAGA group, 64.08+/-2.08% in the TSGA group and 68.32+/-4.12% in the TAGA infants. The difference between transfused PAGA group and other groups was statistically significant (p<0.05).
Adult ; Alkalies ; Fetal Hemoglobin* ; Gestational Age* ; Humans ; Infant ; Infant, Newborn* ; Infant, Premature ; Mortality ; Oxygen ; Parturition

Erythropoietin is the major hormonal regulator of erythropoiesis. It is controlled by many factors inducing hypoxia in tissue. The serum erythropoietin levels of neonates have shown gradual dccrease until 1 month of age, which they are reactivated in the period of physiologic anemia. This change is exaggerated if the meonates are born prematurely, and the levels of erythropoietin respond to lower hemoglobin are lower than those of term neonates and adults. The purpose of this study was to assess the values of erythropoietin levels to compare hemoglobin on the preterm and term neonates until 1 month of age. The results were as follows: 1) At birth mean erythropoietin values of preterm and term neonates were 16.5+/-1.4mU/ml, 16.5+/-1.7mU/ml respectively, there was no significant difference. Also erythropoietin values in preterm and term neonates were 23.6+/-13.3mU/ml, 10.9+/-1.5mU/ml respectively. Resticulocyte counts in preterm and term neonates were 10.7+/-3.3%, 5.7+/-2.9% respectively, so they were significantly higher in preterm than in term neonates. 2) The changes of mean hemoglobin, reticulocyte counts and erythropoietin according to postnatal ages were that those of reticulocyte counts and erythropoietin were significantly increased about 1 month of age. 3) At the 1 month of age, mean erythropoietin values in preterm neonates were lower than those of term neonates and adults, despite of the lowest hemoblobin. This results showed that erythropoietin values in preterm neonates during the physilolgic anemia were lower values than those of term neonates and adults in spite of the lowest hemoglobin.
Adult ; Anemia ; Anoxia ; Erythropoiesis ; Erythropoietin* ; Humans ; Infant, Newborn* ; Parturition ; Reticulocyte Count

PURPOSE: Retinopathy of prematurity (ROP) is a disorder of developing retinal blood vessels in extremely premature infants. In the 1950's, the relationship of ROP and prolonged administraion of oxygen was demonstrated by many randomized clinical trials. After than, Oxygen use was severely restricted and the incidence of ROP was decreased. However, with the development of modern intensive care, ventilator, artificial surfactant, and other technology, the survival of extremely premature infants and incidence of ROP are increasing So we studied the time of development and risk factors of ROP. We also studied to decide the optimal time of mass screening in the preterm infants. METHODS: We studied 436 infants who was admitted in NICU of Ewha Womans Uninvesity Hospital for the treatment of RDS, prematurity or other reasons. They were examined by indirect opthalmoscope to schedule. RESULTS: 1) Among 436 infants, 49 infants (11.2%) were diagnosed as a retinopathy of prematurity. 2) The indicence of ROP increased with small gestational ages and low birth weights and the mean gestational age in the group of ROP was 30.9+/-4.0weeks and mean birth weight was 1450+/-352gms. 3) Mean age of first diagnosing time was 5.6 weeks after birth and the range of distribution was very wide. But mean age of first diagnosing time in gestational age was 36.3 weeks and it's range was narrow 4) The risk factors of ROP were prolonged use of oxygen, high concentration of oxygen with ventilator, frequent apnea, sepsis, hyaline membrane disease, bronchopulmonary dysplasia, the use of xanthine derivatives, phototherapy over than 1 week, surfactant treatment, perinatal asphyxia. CONCLUSION: Retinopathy of prematurity has a relationship with small gestational period, low birth weights, long duration of high oxygen, and other risk factors. The optimal period of mass screening in preterm infants for ROP is from 33 weeks to 36 weeks gestational age rather than chronological age after birth.
Apnea ; Appointments and Schedules ; Asphyxia ; Birth Weight ; Bronchopulmonary Dysplasia ; Female ; Gestational Age ; Humans ; Hyaline Membrane Disease ; Incidence ; Infant ; Infant, Extremely Premature ; Infant, Low Birth Weight ; Infant, Newborn ; Infant, Premature ; Critical Care ; Mass Screening ; Oxygen ; Parturition ; Phototherapy ; Retinal Vessels ; Retinopathy of Prematurity* ; Risk Factors* ; Sepsis ; Ventilators, Mechanical ; Xanthine

No abstract available.
Humans ; Infant, Newborn*

No abstract available.
Humans ; Infant, Newborn*

No abstract available.
Candidiasis* ; Humans ; Infant, Newborn ; Infant, Premature

No abstract available.
Rheumatoid Nodule* ; Scalp*

Sixteen strains of LT-producing enterotoxigenic E. coli 0128 which were isolated from diarrheal patient's stool in Pusan University Hospital, were serotyped and analyzed for plasmid DNA profile, MRHA of human blood cells, and also tested for possession of LT, ST, aggA, EAST1 genes by the PCR method and analyzed the RAPD pattern. Screening sensitivity for ETEC by salting out test was 87.5%. These data suggest that hydrophobicity test using salting out is rapid, inexpensive, and simple screening test for ETEC. CFAs were identified in 87.5% of strains; 43.75% the strains harbored CFA/I, 43.75% CFA/II, and 12.5% expressed none of these CFAs. For plasmid profiles, 12 strains had 60 MDa plasmid and several smaller plasmids. The strains showed 5 types of plasmid profiles. By PCR, LT gene but not ST gene was detected from all of the 16 strains EAST1 gene was detected from 14 strains. Ten strains could be differentiated to 3 patterns by chromosomal DNA fingerprint. The chromosomal DNA fingerprinting is considered very useful for the epidemiological study.
Blood Cells ; Busan ; DNA ; DNA Fingerprinting ; Enterotoxigenic Escherichia coli* ; Humans ; Hydrophobic and Hydrophilic Interactions ; Mass Screening ; Plasmids ; Polymerase Chain Reaction ; Virulence Factors* ; Virulence*