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[Etiology of RDS in infants weighing more than 2500 g (author's transl)]
Insights
Infants born via induced labor before full term, even those weighing over 2500g, showed higher risks for Respiratory Distress Syndrome (RDS). This highlights a critical factor in neonatal respiratory health outcomes.
Area of Science:
- Neonatal Medicine
- Perinatal Research
- Pediatric Respiratory Health
Context:
- Examined 7005 live births between 1974-1977 at a Vienna university clinic.
- Focused on infants weighing >2500g who developed Respiratory Distress Syndrome (RDS).
- Excluded infants with malformations, jaundice, or those born to diabetic mothers.
Purpose:
- To investigate risk factors and outcomes for infants with Respiratory Distress Syndrome (RDS), particularly those with higher birth weights.
- To compare mortality rates and clinical findings in RDS infants with control groups.
- To identify specific maternal and obstetrical factors associated with RDS development.
Summary:
- The study found similar mortality rates for RDS infants regardless of birth weight (>2500g vs. <2500g).
- Significant associations with RDS in heavier infants included primiparity, abnormal obstetric histories, imminent abortion, cerclage, and EPH gestoses.
- Induced birth before the biological term was a decisive factor for RDS development in infants weighing over 2500g.
Impact:
- Findings suggest that birth induction timing is a critical factor influencing RDS development in larger infants.
- Highlights the prognostic significance of poor Apgar scores and lack of recovery at 5 minutes in RDS infants.
- Informs clinical practice regarding risk assessment and management of pregnancies nearing term, especially those with potential risk factors.
Abstract:
Between 1974 to 1977, 7005 infants were born live at the I. University Clinic of Obstetrics and Gynecology, Vienna. 55 of these infants weighed at birth more than 2500g and developed RDS (Respiratory Distress Syndrome) as a result of which 16 died. All infants showing either malformations, icterus gravis (malignant jaundice) or infants delivered by insulin dependent diabetic mothers were excluded. The remaining 48 infants were compared with two control groups selected at random. The mortality rate for infants with RDS weighing more than 2500g (29,1%) was identical with those weighing less than 2500g (28,7%). The significant finding in the RDS group was the high incidence of primiparae, mothers with abnormal obstetrical histories, imminent abortion, cerclage operations and EPH gestoses. On three women in this group extragenital surgery which was performed during pregnancy appeared noteworthy. Time of labor, prolonged delivery time or surgical interference at time of birth did however not seem to make any difference. The RDS group showed in the 1 minute as well as in the 5 minute Apgar-Value distinctly worse results, whereby the missing recuperation after 5 minutes is typical and prognostically unfavourable for RDS. Of decisive importance for the development of RDS in infants weighing more than 2500g was birth induction before the end of the biological term.