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 .
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.
연구 개요
상태
상태
정황
정황
상세 설명
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.
연구 유형
연구 유형
등록 (추정된)
등록
연락처 및 위치
연구 연락처
연구 연락처
- 이름: Hanna Matt Louize, Specialist
- 전화번호: +201287618565
- 이메일: hanna.matta0155@med.aun.edu.eg
참여기준
자격 기준
자격 기준
공부할 수 있는 나이
- 성인
건강한 자원 봉사자를 받아들입니다
샘플링 방법
연구 인구
설명
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
공부 계획
연구는 어떻게 설계됩니까?
디자인 세부사항
그룹/코호트 수
코호트 및 개입
그룹/코호트그룹/코호트 |
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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.
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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.
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연구는 무엇을 측정합니까?
주요 결과 측정
주요 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
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Aortic Isthmus Pulsatility Index
기간: Day 1
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Measurement of the aortic isthmus pulsatility index (PI) and its correlation with the severity of fetal growth restriction based on estimated fetal weight percentiles.
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Day 1
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2차 결과 측정
2차 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
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Cerebroplacental Ratio
기간: Day 1
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Measurement of cerebroplacental ratio (MCA PI / UA PI) and its correlation with aortic isthmus Doppler findings.
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Day 1
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Ductus Venosus Doppler
기간: Day 1
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Assessment of ductus venosus pulsatility index and its relationship with aortic isthmus Doppler changes in fetal growth restriction.
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Day 1
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Uterine and Umbilical Artery Doppler
기간: Day 1
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Evaluation of uterine artery and umbilical artery pulsatility indices and their association with aortic isthmus Doppler parameters.
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Day 1
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Isthmic Flow Index
기간: 1 day
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Assessment of isthmic flow index (IFI) and its association with fetal hemodynamic changes in fetal growth restriction cases.
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1 day
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공동 작업자 및 조사자
연구 기록 날짜
연구 주요 날짜
연구 시작 (추정된)
연구 시작
기본 완료 (추정된)
기본 완료
연구 완료 (추정된)
연구 완료
연구 등록 날짜
최초 제출
최초 제출
QC 기준을 충족하는 최초 제출
QC 기준을 충족하는 최초 제출
처음 게시됨 (실제)
처음 게시됨
연구 기록 업데이트
마지막 업데이트 게시됨 (실제)
마지막 업데이트 게시됨
QC 기준을 충족하는 마지막 업데이트 제출
QC 기준을 충족하는 마지막 업데이트 제출
마지막으로 확인됨
마지막으로 확인됨
추가 정보
이 연구와 관련된 용어
추가 관련 MeSH 약관
기타 연구 ID 번호
기타 연구 ID 번호
- HannaMSc-E-iugr-2026
개별 참가자 데이터(IPD) 계획
개별 참가자 데이터(IPD)를 공유할 계획입니까?
약물 및 장치 정보, 연구 문서
미국 FDA 규제 의약품 연구
미국 FDA 규제 기기 제품 연구
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