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OCTA Evaluation of Retinal Vascularization in Preterm Infants With or Without Bronchopulmonary Dysplasia (OCTA_BRO)

11. Juni 2026 aktualisiert von: Centre Hospitalier Intercommunal Creteil

Retinal vascularization in humans develops between the 16th and 36th weeks of amenorrhea, in a centrifugal pattern starting from the optic disc. In the case of premature birth, the immature peripheral retina is at risk of ischemia due to incomplete vascular development.

Prematurity is often associated with respiratory fragility. It frequently requires ventilatory support in the form of oxygen therapy, either invasive (orotracheal intubation) or non-invasive, which induces reflex arteriolar vasoconstriction, thereby worsening the existing ischemia. This raises the question of whether subclinical retinal vascular changes, detectable by OCT angiography, may explain the increased risk of amblyopia and the need for optical correction observed in these patients.

OCT angiography is rapidly expanding in the field of retinal vascular diseases: it is a simple, fast, reliable, and non-invasive examination, requiring no injection, that enables high-resolution visualization of retinal vascularization, with separate analysis of the retinal plexuses and the choriocapillaris.

Studienübersicht

Status

Noch keine Rekrutierung

Bedingungen

Intervention / Behandlung

Detaillierte Beschreibung

Retinal vascularization in humans develops between the 16th and 36th weeks of gestational age, progressing centrifugally from the optic disc. In the case of premature birth, the immature peripheral retina is at risk of ischemia due to incomplete vascular development. This lack of perfusion in the retinal periphery leads to abnormal secretion of pro-angiogenic factors, promoting the formation of abnormal neovessels, which may be complicated by vitreous hemorrhage and tractional retinal detachment, resulting in permanent visual impairment.

Conversely, it is known that premature infants have a smaller central avascular zone compared with full-term infants. This region of the retina, where 90% of cones are concentrated, must remain free of vascular structures to allow optimal vision.

Prematurity is often associated with respiratory fragility. It frequently requires ventilatory support in the form of oxygen therapy, either invasive (orotracheal intubation) or non-invasive, which induces reflex arteriolar vasoconstriction and worsens the ischemia already present in the periphery.

Clinically, after birth, ocular disorders are more frequently observed in premature children, including amblyopia, impaired contrast sensitivity, refractive errors, strabismus, and optic nerve abnormalities.

It is therefore reasonable to question whether subclinical retinal vascular changes exist, detectable by OCT angiography, and associated with these clinical differences.

Indeed, OCT-A makes it possible to detect changes in foveal and peripapillary retinal microvascularization more sensitively than dilated fundus examination (allowing detection of subclinical microvascular abnormalities), as has been demonstrated in numerous retinal diseases. It thus contributes to diagnosis, follow-up, assessment of therapeutic response, and prognosis in many retinal pathologies.

OCT angiography is rapidly expanding in the field of retinal vascular diseases: it is a simple, quick, reliable, non-invasive, dye-free examination that enables high-resolution study of retinal vasculature, with separate analysis of the retinal plexuses and the choriocapillaris.

It would also be of interest to investigate whether there is a correlation between neonatal parameters, retinal vascular changes observed on OCT-A, and clinical findings (vision and refraction). If such a correlation is demonstrated, it could enable targeted and personalized visual screening of individuals identified as being at highest risk, with stratification of ocular risk based on neonatal history and OCT-A measurements.

Finally, such a study would improve our understanding of retinal development during the neonatal period, the factors that may influence it, and the mechanisms potentially responsible for the observed disorders.

Studientyp

Interventionell

Einschreibung (Geschätzt)

56

Phase

  • Unzutreffend

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienkontakt

Studienorte

      • Créteil, Frankreich, 94000
        • Centre Hospitalier Intercommunal de Créteil
        • Kontakt:

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

  • Kind

Akzeptiert gesunde Freiwillige

Nein

Beschreibung

Inclusion Criteria:

  • Preterm group:

Any child aged 5 to 15 years born at or before 28 weeks' gestation (with or without bronchopulmonary dysplasia), followed or not at CHIC.

-Control group: Any child aged 5 to 15 years born at or after 38 weeks' gestation, attending ophthalmology consultations at CHIC.

  • Agreement to participate in the study protocol
  • Child living near CHI Créteil
  • Enrolled in a social security scheme

Exclusion Criteria:

  • Neurobehavioral disorders or psychomotor delay preventing the examination from being performed
  • Presence of ROP (retinopathy of prematurity) involving zone I or having received intravitreal injections (IVT) of anti-VEGF (as this may directly alter OCT-A parameters)
  • Pre-existing retinal disease: macular scar of any cause, retinal vascular abnormalities such as sickle cell disease or diabetes
  • Pre-existing optic nerve diseases: glaucoma, coloboma, tumors
  • Chronic respiratory diseases other than BPD (bronchopulmonary dysplasia) (i.e., not associated with prematurity): cystic fibrosis, bronchiectasis, etc.
  • General condition unrelated to prematurity that may have a retinal impact: for example respiratory diseases other than BPD
  • Participation in an interventional ophthalmology study
  • History of febrile seizures in infancy or epilepsy contraindicating the use of eye drops

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Verhütung
  • Zuteilung: Nicht randomisiert
  • Interventionsmodell: Parallele Zuordnung
  • Maskierung: Keine (Offenes Etikett)

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
Sonstiges: former preterm children born
14 former preterm children born at ≤28 weeks of gestational age, without bronchopulmonary dysplasia (BPD), followed or not at CHIC 14 preterm children born at ≤28 weeks of gestational age, with BPD, followed or not at CHIC
OCTA evaluation of retinal vascularization in preterm infants with or without bronchopulmonary dysplasia.
Sonstiges: 28 childrens in the control group
28 childrens in the control group (no prematurity, no BPD), selected during a routine ophthalmology consultation scheduled at CHIC, born at ≥38 weeks of gestational age
OCTA evaluation of retinal vascularization in preterm infants with or without bronchopulmonary dysplasia.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Highlight a difference in vascular density on OCT-A (%), between preterm infants (born ≤ 28 weeks of gestational age) and control infants (born > 38 weeks of gestational age)
Zeitfenster: Day 1
Macular and peripapillary vascular densities "percent" based on OCT-A images of the superficial and deep capillary plexuses in the control group of children and the preterm infant group
Day 1

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Foveal avascular zone area
Zeitfenster: Day 1
Area of the foveal avascular zone measured on OCT-A images, expressed in mm².
Day 1
Fractal dimension on OCT-A images
Zeitfenster: Day1
Fractal dimension calculated from OCT-A retinal vascular images.
Day1
Best-corrected visual acuity
Zeitfenster: Day1
Best-corrected visual acuity assessed using the Snellen scale.
Day1
Visual acuity (Snellen scale) with correction Spherical equivalent (SE)
Zeitfenster: Day1
Spherical equivalent calculated as: SE = S + ½ C
Day1
Evaluation of retinal vascular density using OCT-A in preterm and term-born children
Zeitfenster: Day 1
percent of retinal vascular density measured on OCT-A images in preterm and term-born children.
Day 1

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Ermittler

  • Hauptermittler: Samia SERAY, Dr, Centre Hospitalier Intercommunal de Créteil

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Geschätzt)

1. Juni 2026

Primärer Abschluss (Geschätzt)

1. Mai 2028

Studienabschluss (Geschätzt)

1. Mai 2028

Studienanmeldedaten

Zuerst eingereicht

17. April 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

7. Mai 2026

Zuerst gepostet (Tatsächlich)

14. Mai 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

15. Juni 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

11. Juni 2026

Zuletzt verifiziert

1. Juni 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Andere Studien-ID-Nummern

  • OCTA_BRO

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Nein

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

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