[Implementation of evidence-based technique in Cesarean section].
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Biomedical subjects
Publications and source records attributed to J Langhoff-Roos.
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OBJECTIVE: To examine the relation between breech delivery and cerebral palsy, considering the influence of intrauterine growth, low Apgar score at birth, and mode of delivery. DESIGN: Register-based, case-control study. POPULATION: A cohort of infants with cerebral palsy born between 1979 and 1986 in East Denmark, identified by linkage of the cerebral palsy register with the national birth register. Discharge letters from births of breech infants with cerebral palsy were reviewed. MAIN OUTCOME MEASURES: Presentation, mode of delivery, gestational age, birthweight, Apgar score, type of cerebral palsy, severity of handicap. RESULTS: Breech presentation at term was associated with a borderline significantly higher risk of cerebral palsy than vertex presentation (OR 1.56; 95% CI 0.9-2.4). Breech presentation infants more often had a lower Apgar score (< 7 at 5 minutes) and were smaller for gestational age (SGA < 2 SD) than were those with vertex presentation; infants with a low Apgar score, or who were small for gestational age, had a higher risk of cerebral palsy. After stratification by being small for gestational age the risk of cerebral palsy was not related to presentation. There were no differences between breech and vertex infants with cerebral palsy in terms of low Apgar score, being small for gestational age, mode of delivery, and severity of the handicap. Breech presentation infants were more often classified as diplegic (77.8% versus 42.3% in cephalic infants). CONCLUSION: The risk of cerebral palsy among term breech presentation infants does not seem to be related to mode of delivery, but is more likely linked to a higher rate of being small for gestational age in breech infants.
This registry-based cohort study aimed to describe the relationship between pregnancy complications in the first and second pregnancy, focussing on idiopathic and indicated preterm birth of singleton infants in either pregnancy. The cohort consisted of all women living in Denmark with a first singleton birth in 1982 and a second in the period 1982-1987 (13,967 women). The risk of a second preterm birth was not significantly different between women who had an idiopathic or an indicated first preterm birth (15.2 and 12.8% respectively). Adjustment by logistic regression analysis for other risk factors for preterm birth did not influence the relative risk (6.0 before 32 weeks and 4.8 between 32 and 36 weeks) of a second preterm birth subsequent to a first one. Women with idiopathic preterm delivery in their first or second pregnancies give birth to infants with lower birth weight in previous or subsequent pregnancies. Emergency cesarean section in a first term pregnancy was a risk factor for subsequent idiopathic preterm birth.
The literature was reviewed in order to find clinical-epidemiological and physiological evidence for which surgical techniques should be preferred when performing Caesarean section. We found reasonable evidence for the following procedure: spontaneous placenta detachment, uterine repair in one layer and non-closure of the peritoneum.
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OBJECTIVES: To analyse which subgroups of perinatal deaths contribute most to the perinatal mortality rate in Lithuania compared with Denmark/Sweden. DESIGN: Comparison of all perinatal deaths in Denmark/Sweden 1991 and Lithuania 1993-1994 by the common Nordic-Baltic perinatal death classification, based on information from the medical records. RESULTS: The doubled perinatal mortality in Lithuania compared with Denmark/Sweden is mainly explained by a threefold increase of intrapartum and two- to fivefold increase in neonatal deaths of nonmalformed infants. The higher rate of malformed infants is partly explained by a four times higher mortality from neural tube defects. CONCLUSIONS: The use of a common perinatal death classification has identified categories mainly responsible for the higher rate of perinatal mortality, but further investigation of potentially avoidable factors requires further study.
In 1991 the perinatal mortality rate in Denmark was 8.0/1000 deliveries compared to 6.5/1000 in Sweden. An international audit was designed to investigate whether the perinatal death rates in the two countries to some extent could reflect differences in the quality of care. Medical records of 97% of all perinatal deaths in 1991 in the two countries were analyzed. A new classification focusing on potential avoidability from a health services perspective was elaborated at a Nordic-Baltic workshop, using the variables: time of death in relation to admission and delivery, fetal malformation, gestational age, growth-retardation and Apgar score at 5 min. Rates of perinatal deaths of malformed infants (0.00195 and 0.00145) and intrapartum deaths of non-malformed infants (0.00042 and 0.00019) were significantly higher in Denmark than in Sweden. The study raised the following questions: why is the rate of perinatal death of malformed infants higher in Denmark than in Sweden and could intrapartum care in Denmark be improved?
An attempt was made to evaluate the possible benefit of selecting women for vaginal breech delivery at term by radiological pelvimetry. Information from medical records on 276 singleton breech deliveries were analysed. A total of 188 breech presentations were diagnosed before the onset of labour, pelvimetry was performed in 74 women, where pelvic dimensions too small for recommendation of vaginal breech delivery were found in 30 cases. The overall rate of caesarean section was 78%, among diagnosed patients it was 84% and 64% among undiagnosed breech presentations. Rates of morbidity (low Apgar score and admission to the neonatal care unit) did not differ significantly between infants delivered vaginally or by elective caesarean section. The material, however, is too small for valid conclusions regarding safety of vaginal delivery of term breech in women selected by criteria including estimate of pelvic size.
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OBJECTIVES: To analyse completeness and validity of data in the Cerebral Palsy Register in Denmark, 1979-1982. METHODS: Completeness has been assessed by comparing data from The Danish National Patient Register (DNPR) with the cases included in the Cerebral Palsy Register (CPR). Agreement between 12 variables in the CPR and obstetrical medical records has been analysed using kappa-statistics. RESULTS: Of 468 children in the DNPR, only 237 fulfilled the inclusion criteria of the CPR; and 35 (15%) of these cases had not been reported to the CPR. Data agreement was generally good, but gestational age was subject to a systematic error, and urinary infections in pregnancy (kappa = 0.43) and placental abruption (kappa = 0.52) were seriously under-reported in the CPR. CONCLUSIONS: Completeness of the Cerebral Palsy Register in Denmark, 1979-1982, has been assessed to maximal 85%, emphasizing the impact of using supplementary case ascertainment sources in the future. Validity of data varied according to definition and significance of the specific variable.
To investigate changes in cerebral palsy birth prevalence and perinatal mortality rate by different gestational age groups, 1979-86, cerebral palsy cases in eastern Denmark were identified from the Danish Cerebral Palsy Register, and information on birth and mortality rates was sought in the Danish Medical Birth Register. From 1979-82 to 1983-86, the birth prevalence of cerebral palsy increased from 2.6 to 3.0 per 1000 (P < 0.05). The rate for infants of 31 weeks' gestation or more did not change, whereas a significant increase was observed in infants below 31 weeks (85-123 per 1000, P < 0.05). In the same periods, perinatal mortality in eastern Denmark decreased significantly from 8.6 to 7.8 per 1000. The decrease in stillbirth rate was significant in all subgroups of gestational ages except in those of 28-30 weeks' gestation. The early neonatal mortality rate decreased significantly only in infants below 31 weeks (282-239 per 1000, P < 0.05). Thus, in eastern Denmark, cerebral palsy birth prevalence has increased from birth-year period 1979-82 to 1983-86 because of an increased rate in preterm infants below 31 weeks, who at the same time had a reduced risk of early neonatal death.
OBJECTIVE: To determine whether treatment with ampicillin and metronidazole in women with threatened idiopathic preterm labour will prolong the gestation and reduce maternal and neonatal infectious morbidity. DESIGN: Randomised controlled double-blind trial. SETTING: Six obstetric departments in the Copenhagen area. POPULATION: One hundred and twelve women with singleton pregnancies, with threatened idiopathic preterm labour and intact amniotic membranes at 26 to 34 weeks of gestation. METHODS: Random allocation to eight days intravenous and oral treatment with ampicillin and metronidazole, or placebo. MAIN OUTCOME MEASURES: Number of days from admission to delivery, gestational age at delivery, rates of preterm delivery, low birthweight, maternal infections and neonatal infections. RESULTS: Treatment with ampicillin and metronidazole was associated with a significant prolongation of pregnancy (admission to delivery 47.5 days versus 27 days, P < 0.05), higher gestational age at delivery (37 weeks versus 34 weeks, P < 0.05), decreased incidence of preterm birth (42% versus 65%, P < 0.05), and lower rate of admission to neonatal intensive care unit (40% versus 63%, P < 0.05), when compared with placebo treatment. Antibiotic treatment had no significant effects on infectious morbidity. CONCLUSIONS: Treatment with ampicillin and metronidazole in women with threatened idiopathic preterm labour significantly prolonged the gestation, but had no effects on maternal and neonatal infectious morbidity.
BACKGROUND: Preterm infants are at 8 times higher risk than term infants for pre- and perinatal brain damage, resulting in cerebral palsy. In this paper we have analysed the influence of prenatal and birth-related risk factors on cerebral palsy in preterm infants. METHODS: In a register-based study, 175 preterm singleton infants with cerebral palsy, born in 1982-86, were compared with 687 controls matched by gestational age and year of birth. RESULTS: Statistically significant higher rates in cases were found in parity > or = 3 (22% vs. 16%, p < 0.05), Cesarean section (67% vs. 56%, p < 0.01), and low Apgar scores at 1 minute (45% vs. 36%, p < 0.05). By multivariate analyses, two variables remained statistically significant: parity > or = 3 (adjusted OR = 1.53 (95% CI 1.00-2.34), p < 0.05) and Cesarean section (adjusted OR = 1.57 (95% CI 1.07-2.32), p < 0.05). CONCLUSIONS: Pregnancy complications preceding preterm birth did not imply a higher risk of cerebral palsy. Delivery by Cesarean section was a prognostic factor for developing cerebral palsy, and the predictive value of Apgar scores was highly limited.
BACKGROUND: In 1991 the rate of intrapartum death of non-malformed fetuses was higher in Denmark than in Sweden (4.2 vs. 1.9 per 10,000, OR 2.24). However, it is not clear whether this difference reflects potentially avoidable cases and/or suboptimal care. MATERIAL AND METHODS: Short descriptions were made from medical records of all 50 intrapartum deaths in Denmark and Sweden in 1991. Ten obstetricians, two from each of the Nordic countries, reviewed the cases to determine whether (1) intra-uterine death might have occurred before admission, (2) surveillance and intervention were insufficient, (3) fetal death was potentially avoidable by improved obstetric care; and, if so, to suggest ways of improved health care. RESULTS: There was a statistically higher rate of insufficient care (surveillance and intervention) (high or less degree) in the Danish cases (66% vs. 55%). The proportion of potentially avoidable fetal deaths was also higher in Denmark (59% vs. 52%) although the difference was not statistically significant. CONCLUSION: The significantly higher rate of intrapartum death of non-malformed infants in 1991 in Denmark compared to Sweden might be reduced by improved intrapartum surveillance and interventions.
BACKGROUND: The monitoring of fetal growth during pregnancy is usually justified because of the increased perinatal risk of these babies. METHODS: In 1552 infants from the Scandinavian Small for Gestational Age Study the need for obstetric interventions, risk of fetal asphyxia and immediate neonatal outcome at term have been studied in relation to different types of fetal growth retardation, including sub-groups with low ponderal index or low amount of subcutaneous fat. RESULTS: The need for obstetric intervention indicated by suspected fetal asphyxia before or during labor was increased 3-fold (6-8%) for growth retarded infants both in SGA infants in general and infants with asymmetric body proportions. The immediate perinatal outcome, however, was favorable with Apgar below 8 at 5 min in only 2% irrespective of the type of growth retardation, in spite of the fact that less than 25% of the SGA pregnancies and 10% of those with asymmetric fetal growth had been eligible for close antenatal fetal monitoring. CONCLUSION: With a moderate increase in interventions at delivery, perinatal outcome was highly favorable for term infants with a weight for gestational age, weight for length or skinfold for weight below the 10th percentile in this population of Scandinavian parous mothers.
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All 30 Danish obstetric departments have answered a questionnaire focusing on local guidelines for delivery of singleton foetuses in breech presentation at term. Two departments recommended caesarean section to all parturients and ten departments to all primiparae. The criteria for recommendation of vaginal delivery varied, one department used pelvimetry, one did not attempt external version, ten did not permit induction of labour. All departments except two always had a specialist in obstetrics present at the delivery, 24 (of 28 departments) an anaesthetist and 20 a paediatrician. The complexity in criteria and organisation reported is not surprising considering different recommendations in the literature, which means that the guidelines are primarily based on traditions and personal experience.