NCT06950164|Active Not RecruitingDMC
Dynamic Changes of Ductus Arteriosus in < 31 Weeks Preterm Infants: an Observational Study
PDA
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PDA
Sponsor study identifier
observational
200
1 country
1
Study Start
April 1, 2025
Actual (reported)Primary Completion
April 30, 2026
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
Study Completion
April 30, 2026
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
The ductus arteriosus quickly closes itself. is an important channel connecting the maternal fetal circulation before birth. After birth, this ductus arteriosus generally no longer has a physical function, so ductus arteriosus quickly closes itself. The persistent presence of ductus arteriosus leads to significant pressure changes in the systemic and pulmonary circulation, which have adverse effects on extremely/very premature infants. Therefore, persistent patent ductus arteriosus (PDA) is a systemic disease.
Registry-reported information. Elapsed time and enrollment totals alone do not measure study progress or recruitment pace.
April 30, 2026
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
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Dates and qualifiers reported by the registry. Estimated dates do not confirm that a milestone has occurred.
April 1, 2025
Actual (reported)April 22, 2025
Actual (reported)April 30, 2025
Actual (reported)April 30, 2026
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
April 30, 2026
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
the incidence of patent ductus arteriosus(PDA)
when did the ductus arteriosus close
three months after birth
dynamic changes of ductus arteriosus in diameter, velocity and direction of blood flow
dynamic changes of ductus arteriosus in diameter, velocity and direction of blood flow were measured
after admission, 12 hour, 24 hour, 48 hour, 72 hour, 96 hour, 120 hour, 144 hour, 168 hour, 192 hour, 216 hour, 240 hour and 2 weeks or any time of ductus arteriosus closed
the incidence of bronchopulmonary dysplasia
36 weeks' gestational age
the incidence of intraventricular hemorrhage(IVH)
36 weeks' gestational age
necrotizing enterocolotis(NEC)
36 weeks' gestational age
in the group, no intervention was given, and the preterm infants were diagnosed with respiratory distress syndrome(RDS)
in the group, no intervention was given, but the preterm infants were diagnosed without respiratory distress syndrome(RDS)
in the group, no intervention was given, and the preterm infants were diagnosed with respiratory distress syndrome(RDS)
in the group, no intervention was given, but the preterm infants were diagnosed without respiratory distress syndrome(RDS)
very preterm infants and extremely preterm infants with respiratory distress syndrome (RDS) and without RDS were included.
Women and Children's hospital of Chonqing Medical University
Chongqing, Chongqing Municipality, 400147, China
First Submitted
April 22, 2025
First Posted
April 30, 2025
Study Start
April 1, 2025
Actual (reported)Primary Completion
April 30, 2026
Estimated (date passed)Effect of Umbilical Cord Milking Versus Clamping in Preterms on Cerebral Oxygenation and Ductus Arteriosus Closure
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This estimate has passed. The registry has not confirmed an actual date for this milestone.
Study Completion
April 30, 2026
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
Last Updated
April 30, 2025
Record last verified: 2025-03
after paper published
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