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Patterns of Aortic Isthmus Doppler in Early Fetal Growth Restriction , and the Changes in Aortic Isthmus Doppler Parameters With Every Changes of Other Early Iugr Parameters Like EFW, Uterine Artery Doppler, Cerebroplacental Ratio and Ductus Venosus Doppler in Comparison With Normal Group .

27. juni 2026 opdateret af: Hanna Matta louize, Assiut University

Patterns of Aortic Isthmus Doppler in Early Fetal Growth Restriction, Cross Sectional Comparative Study

This study aims to evaluate the patterns of aortic isthmus Doppler in fetuses diagnosed with early fetal growth restriction (FGR) and to correlate these findings with the severity of FGR and other Doppler parameters.

A cross-sectional comparative observational study will be conducted on singleton pregnant women attending the fetal medicine unit at Assiut University Hospital. Participants will be divided into two groups: fetuses with FGR and normal controls.

Doppler measurements including aortic isthmus indices, uterine artery, umbilical artery, middle cerebral artery, cerebroplacental ratio, and ductus venosus will be assessed at a single time point. The study will help to clarify the clinical value of aortic isthmus Doppler in early detection and assessment of fetal compromise in FGR cases.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Detaljeret beskrivelse

Fetal growth restriction (FGR) is a major contributor to perinatal morbidity and mortality and is commonly associated with placental insufficiency. Early identification of fetal compromise remains a significant clinical challenge. Doppler assessment of fetal circulation has been widely used to monitor affected fetuses, including evaluation of the umbilical artery, middle cerebral artery, and ductus venosus.

The aortic isthmus represents a critical vascular junction reflecting the balance between cerebral and placental circulation. Changes in aortic isthmus Doppler patterns may provide early insights into fetal hemodynamic adaptation and deterioration in cases of FGR.

This cross-sectional comparative observational study will be conducted at the fetal medicine unit, Women's Health Hospital, Assiut University. The study population will include singleton pregnancies diagnosed with FGR (EFW <10th percentile) and a control group of normal fetuses.

Participants will undergo a single-time Doppler assessment including fetal biometry, uterine artery PI, umbilical artery PI, middle cerebral artery PI, cerebroplacental ratio, ductus venosus PI, and aortic isthmus Doppler indices. The aortic isthmus flow will be classified based on the isthmic flow index (IFI) into five categories, reflecting progressive hemodynamic changes.

The primary objective is to determine the correlation between aortic isthmus Doppler changes and the severity of FGR based on estimated fetal weight percentiles. Secondary objectives include correlation of aortic isthmus findings with cerebroplacental ratio and ductus venosus parameters.

This study is designed as a pilot exploratory study due to limited previous data. Results are expected to enhance understanding of fetal hemodynamics and potentially improve monitoring strategies in pregnancies complicated by FGR.

Undersøgelsestype

Observationel

Tilmelding (Anslået)

100

Kontakter og lokationer

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Studiekontakt

Deltagelseskriterier

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Berettigelseskriterier

Aldre berettiget til at studere

  • Voksen

Tager imod sunde frivillige

Ja

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

Singleton pregnant women attending the fetal medicine unit at Women's Health Hospital, Assiut University, including both fetal growth restriction cases and normal controls.

Beskrivelse

Inclusion Criteria:

  • Singleton pregnancy
  • Diagnosis of fetal growth restriction (estimated fetal weight <10th percentile for gestational age)
  • Written informed consent obtained from the patient

Exclusion Criteria:

  • Major fetal structural anomalies, especially cardiovascular anomalies
  • Multiple pregnancy (e.g., twins)
  • Suspected chromosomal abnormalities or genetic syndromes
  • Severe maternal comorbidities affecting Doppler results (e.g., uncontrolled diabetes, lupus)
  • Uncertain gestational age
  • Fetal demise before Doppler assessment

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Kohorter og interventioner

Gruppe / kohorte
FGR Group
Singleton pregnancies diagnosed with fetal growth restriction (estimated fetal weight less than the 10th percentile for gestational age), undergoing Doppler assessment including aortic isthmus and other fetal vessels.
Control Group
Singleton pregnancies with normal fetal growth (estimated fetal weight above the 10th percentile), undergoing the same Doppler assessment as the FGR group for comparison.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Aortic Isthmus Pulsatility Index
Tidsramme: Day 1
Measurement of the aortic isthmus pulsatility index (PI) and its correlation with the severity of fetal growth restriction based on estimated fetal weight percentiles.
Day 1

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Cerebroplacental Ratio
Tidsramme: Day 1
Measurement of cerebroplacental ratio (MCA PI / UA PI) and its correlation with aortic isthmus Doppler findings.
Day 1
Ductus Venosus Doppler
Tidsramme: Day 1
Assessment of ductus venosus pulsatility index and its relationship with aortic isthmus Doppler changes in fetal growth restriction.
Day 1
Uterine and Umbilical Artery Doppler
Tidsramme: Day 1
Evaluation of uterine artery and umbilical artery pulsatility indices and their association with aortic isthmus Doppler parameters.
Day 1
Isthmic Flow Index
Tidsramme: 1 day
Assessment of isthmic flow index (IFI) and its association with fetal hemodynamic changes in fetal growth restriction cases.
1 day

Samarbejdspartnere og efterforskere

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Sponsor

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

1. juli 2026

Primær færdiggørelse (Anslået)

1. juni 2028

Studieafslutning (Anslået)

1. juni 2029

Datoer for studieregistrering

Først indsendt

22. juni 2026

Først indsendt, der opfyldte QC-kriterier

27. juni 2026

Først opslået (Faktiske)

30. juni 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

30. juni 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

27. juni 2026

Sidst verificeret

1. juni 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • HannaMSc-E-iugr-2026

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