Biomedical subjects

Atli Dagbjartsson

Publications and source records attributed to Atli Dagbjartsson.

6 recordsLinked to original sources

PubMed2006

[Neonatal life support].

Although most newborn infants are vigorous at birth, some need to be resuscitated. Therefore, at least one person skilled in neonatal resuscitation should be present at every delivery and appropriate equipment for resuscitation should be available. Most infants who require resuscitation only need respiratory support. Chest compressions and administration of medications are infrequently needed. This article provides guidelines on neonatal resuscitation, which are mainly based on recently published International Liaison Committee on Resuscitation (ILCOR) guidelines.

Delivery Rooms↗

PubMed2005

[The efficacy of high frequency ventilation in severe neonatal respiratory failure].

OBJECTIVE: To evaluate the efficacy of high frequency ventilation (HFV) in infants failing conventional ventilator therapy at our institution. STUDY GROUP AND METHODS: Medical records of all infants managed on HFV after having failed conventional ventilator management from 1994-2004 were reviewed. Ventilatory settings, blood gases and pH just prior to starting HFV, and two and four hours after starting HFV were recorded. RESULTS: Sixty one infants met the study criteria. At two hours of HFV there was a significant improvement in oxygenation (Alveolar to arterial oxygen tension difference), ventilation and acid-base balance. These values were not significantly different between two and four hours of HFV. There was no significant difference in oxygenation between survivors (n=41) and non-survivors (n=20) prior to HFV, but after two hours of HFV the survivors had significant improvement in oxygenation. Thirty one of the survivors had improved oxygenation at two and four hours of HFV, but only eight of the nonsurvivors (p=0.03). CONCLUSIONS: HFV results in significant improvements in oxygenation, ventilation and acid-base balance in most infants failing conventional ventilatory management. The immediate response to HFV may be a predictor of survival in infants with severe hypoxic respiratory failure.

Acid-Base Equilibrium↗

PubMed2004

[Extremely Low Birthweight Infants in Iceland. Neurodevelopmental profile at five years of age.].

OBJECTIVE: This study was part of a geographically defined national study on survival, health, development, and longterm outcome of extremely low birthweight infants (ELBW; birthweight < 1000g) in Iceland focusing on development and neurodevelopmental measures in comparison to a reference group. METHODS: All 35 ELBW longtime survivors born in 1991-95 and 55 children as matched reference group were enrolled in a prospective study on longterm health and development. The children underwent medical examinations and neurodevelopmental testing at five years of age in 1996-2001, and their parents answered a questionnaire on their behavior. Comparison was made between ELBW infants and the reference group. Revised (WPPSI-R) showed significantly lower full scale IQ scores for the ELBW group compared to the reference group (p<0.001). More difference was apparent between the groups for the performance IQ than the verbal IQ. Scores on Test of Language Development (TOLD-2P) showed differences between the ELBW group and the reference group on the total language quotient (p=0.025). Significant differences were not obtained between the groups on TOLD-2P s individual subtests, languistic features nor linguistic systems. Total Scores on the Miller Assessment for Preschoolers (MAP) with emphasis on sensory motor development, were significantly lower for the ELBW group compared to the reference group (p<0.001). Additionally, significant differences were found on three of five subscales of the MAP. Evaluation of fine motor skills with the Finmotorisk utvecklingsstatus 1-7aar (FU) revealed significant differences (p<0.001), favoring the reference group. Parental answers on the Child Behavior Checklist (CBCL) showed differences between the groups on three of eight factors in favor of the reference group (p<0.001). CONCLUSIONS: Developmental testing at five years of age indicates that the performance of 25% of the ELBW children in this study, is consistent with that of same age peers. However, as a group, the ELBW children performed significantly poorer regarding cognitive development and sensory-motor skills when compared to the reference group. The most prominent neurodevelopmental difficulties of the ELBW children were within perceptual organization, coordination, and executive skills. Behavior problems were not rated as significant according to parental answers, although there were some differences between the groups. Since a large portion of ELBW children experiences developmental problems, it is important to provide early intervention during preschool years and support services and special education during school years, to reduce the longterm effects of developmental deficits.

English Abstract↗

PubMed2003

[Extremely low birthweight infants in iceland. Survival and disability.].

OBJECTIVE: In recent years advances in medical care and technology have increased newborn survival rate, both fullterm and preterm. This is reflected in a low Perinatal Mortality Rate in Iceland. Survival of extremely low birthweight infants (ELBW with BW<1000g) has also increased, especially since the availability of surfactant therapy for Respiratory Distress Syndrome of Prematurity. The purpose of this geographically defined national study was to evaluate survival and longterm outcome of ELBW children in Iceland. MATERIAL AND METHODS: Information on all births in Iceland 1982-95 was collected from the National Birth Registry and Statistics Iceland with information on ELBW infants weighing 500-999g born in two periods 1982-90 and 1991-95, before and after the use of surfactant became routine therapy. Information on disability was obtained from records at the State Social Security Institute. Comparison was made between the two groups of ELBW infants. RESULTS: In 1982-90 the proportion of ELBW infants was 0.3% of all births (116 of 38.378) and longterm survival at five years of age was 19 of 87 liveborn children or 22%. In 1991-95 ELBW infants were 0.5% of all births (102 of 22.261) and longterm survival was 35 of 67 liveborn children or 52%. Of the 19 ELBW children born in 1982-90 three are considered handicapped (16%) and 6 of 35 ELBW children born in 1991-95 (17%). CONCLUSIONS: The study shows that at the same time that proportionally more children are of extreme low birthweight, the survival of ELBW infants has increased from 22% in 1982-90 to 52% in 1991-95. The proportion of ELBW children with disability is not increased significantly between the two periods.

English Abstract↗

PubMed2003

[Carriage of group B beta-haemolytic streptococci among pregnant women in Iceland and colonisation of their newborn infants.].

OBJECTIVE: To determine the carrier rate of group B beta-haemolytic streptococci (GBS) of pregnant women in Iceland and the colonisation of their newborns. MATERIAL AND METHODS: A prospective study was conducted from October 1994 until October 1997, where culture specimens for GBS were taken from vagina and rectum of pregnant women attending the prenatal clinics at the Department of Obstetrics and Gynecology, Landspitali University Hospital and the Reykjavik Health Centre. The samples were taken at 23 and 36 weeks gestation and at delivery. Culture samples were also taken from axilla, umbilical area and pharynx of their newborn infants immediately after birth. Included in the study were pregnant women born on every fourth day of each month. Carrier state was not treated during pregnancy, but Penicillin G was given i.v. at delivery if the last culture before delivery was positive and gestational age was <37 weeks, rupture of membranes was >12 hours before delivery or the mother had a fever >38 degrees C. RESULTS: Cultures were taken from 280 women and their children. GBS carrier rate of pregnant women in Iceland was 24.3%. Twelve newborns had GBS positive cultures. No newborn had a confirmed septicemia. Cultures from 25% of newborns, who s mothers were still GBS carriers at birth, were positive for GBS. Positive predictive value of cultures taken at 23 weeks gestation was 64% and 78% at 36 weeks. Negative predictive value was 95% and 99% respectively. CONCLUSION: One out of every four pregnant women in Iceland is a GBS carrier. Twentyfive percent of newborns become colonised with GBS if the mother is a GBS carrier at delivery. When screening for GBS carrier state is done cultures from both vagina and rectum is more sensitive than cultures from vagina only. At least five percent of all newborns in Iceland are therefore expected to have positive skin cultures at birth. If the mother does not have positive GBS cultures during pregnancy, the likelihood that she will give birth to a GBS colonised child is almost none.

English Abstract↗

PubMedDate not supplied

[Extremely Low Birthweight Infants in Iceland. Health and development.].

OBJECTIVE: Survival of extremely low birthweight infants (BW<1000g) in Iceland has increased in recent years, especially since the availability of surfactant therapy for Respiratory Distress Syndrome of Prematurity. This study was part of a geographically defined national study on survival, health, development and longterm outcome of extremely low birthweight (ELBW) infants in Iceland focusing on health, development and disabilities with reference to a control group. MATERIAL AND METHODS: Information from the National Birth Registry on births in Iceland of ELBW infants weighing 500-999g was collected in two periods 1982-90 and 1991-95, before and after surfactant therapy became available. Information on pregnancy, birth, diseases in the newborn period and later health problems was collected from hospital records. The ELBW infants born in 1991-95 and matched control children were enrolled to a prospective study on longterm health and development. The children undervent medical examinations and developmental testing at 5 years of age in 1996-2001. Comparison was made between the two groups of ELBW infants and between ELBW infants and control children born in 1991-95. RESULTS: In 1982-90 the longterm survival of ELBW infants at 5 years of age was 22% and 52% in 1991-95. In both periods 1982-90 and 1991-95 similar data was found on ELBW infants regarding mothers health, pregnancy, birth and neonatal period. Difference was found in maternal age being significantly higher (p=0.02) and significally more deliveries by cesarian section (p=0.02) in the latter period. The two groups of ELBW infants were similar regarding sex, birthweight and diseases in the newborn period. Comparison between 35 ELBW infants and 55 control children born 1991-95 showed that significantly more mothers of ELBW children smoked during pregnancy (p=0.003) and suffered from various diseases (p=0.001). More ELBW children were born by cesarian section (p=0.001) than control children and their parents reported more longterm health problems regarding astma (p=0.001), convulsions (p=0.001), difficulties in swallowing (p=0.001) and weight gaining (p=0.005). At five years of age significantly more ELBW children born in 1991-95 compared to control children had abnormal general physical examination (p</=0.001), neurological examination (p</=0.001) and motor skills (p</=0.001). Scores on developmental testing were significantly lower (p=0.002). The proportion of ELBW children with disabilities was 16% in 1982-90 and 14% in 1991-95. CONCLUSIONS: The two groups of ELBW infants born in 1982-90 and 1991-95 are similar regarding problems during pregnancy, birth and newborn period. The proportion of children with disabilities is similar in both periods although survival was significantly increased. When compared to matched control children, ELBW children born in 1991-95 suffer significantly more longterm health and developmental problems.

English Abstract↗