Functional Evaluation of the Fetal Lung by Functional Magnetic Resonance Imaging - Blood Oxygenation Level Dependent (MRI-BOLD), in Congenital Diaphragmatic and Parietal Malformations

Congenital Diaphragmatic Hernia Clinical Trial

— BOLD FETUS  

Official title:

Functional Magnetic Resonance Imaging - Blood Oxygenation Level Dependent (MRI-BOLD) of the Feta Lung in Congenital Diaphragmatic and Parietal Malformations

Clinical Trial Details — Status: Withdrawn

Administrative data

• NCT number: NCT04186039
• Other study ID #: APHP191058
• Secondary ID: 2019-A02623-54
• Status: Withdrawn
• Phase: N/A
• Start date: May 2020
• Est. completion date: May 2022

Study information

• Verified date: November 2022
• Source: Assistance Publique - Hôpitaux de Paris
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The objective is to evaluate the quality of the response to the Blood Oxygen Level Dependent effect in fetuses with diaphragmatic hernias and abdominal wall malformations and to correlate with postnatal respiratory outcome. Pulmonary involvement is a constant in diaphragmatic hernias, it is classic in omphaloceles and especially hepatomphaloceles, and exceptional in laparoschisis. As this is an original exploratory study, no preliminary data are available.

If a correlation is found, the Blood Oxygen Level Dependent effect of the fetal lung may be considered as an early functional marker of postnatal lung function. It can be used in addition to lung-to-head-ratio during prenatal counseling.

The final goal is to be able to detect early in the fetus pulmonary insufficiency to help prenatal counseling and perinatal care.

Description:

During the fetal period, there is in the lungs a permanent flow and pressure variations between the "inhaled" amniotic fluid and alveolar secretions, which are essential for pulmonary development. A disruption of this physiological mechanism can induce disorders of the respiratory function, which go from simple delay of maturation to hypoplasia. Respiratory function involves the thoracic muscles (diaphragmatic and intercostal) but also the abdominal muscles, that explains why breathing difficulties are found at birth in neonates with diaphragmatic hernia but also abdominal wall malformations.

This pulmonary involvement highly contributes to the morbidity observed at birth, for which strong prenatal predictive criteria are lacking.

Pulmonary volume measurement by the lung-to-head-ratio is widely used for diaphragmatic hernia has been extended to other congenital malformations, because no other available criteria. The lung-to-head-ratio is a parameter well correlated with survival but insufficiently with morbidity and sequelae.

New functional imaging techniques are in development. Among them, the Blood Oxygen Level Dependent uses hemoglobin as an endogenous contrast agent. It is based on the comparison of a basic status in ambient air with status after oxygenation. It gives a functional evaluation of the organs. But this technique has never been evaluated in the fetal lung yet.

The objective of the study is to evaluate the quality of the response to the Blood Oxygen Level Dependent effect in fetuses with diaphragmatic hernias and abdominal wall malformations and to correlate with postnatal respiratory outcome. It is an original exploratory study and no preliminary data are thus available.

If a correlation is found, the Blood Oxygen Level Dependent effect of the fetal lung may be considered as an early functional marker of postnatal lung function. It could then be used in addition to lung-to-head-ratio during prenatal counseling. The final goal is to be able to detect early in the fetus pulmonary insufficiency to help prenatal counseling and perinatal care.

Recruitment information / eligibility

• Status: Withdrawn
• Enrollment: 0
• Est. completion date: May 2022
• Est. primary completion date: May 2022
• Accepts healthy volunteers: No
• Gender: Female
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Major patient,

• patient with a simple pregnancy,

• patient between 28 and 33 weeks of amenorrhea,

• patient undergoing fetal MRI as part of their usual care, for fetal / placental indications : diaphragmatic hernia, omphalocele and laparoschisis,

• informed consent signed by the patient and the investigator,

• patient affiliated to a social security scheme (beneficiary or beneficiary).

Exclusion Criteria:

• Patient with one of the usual contraindications for MRI,

• claustrophobic patient,

• patient with an abdominal perimeter> 125 cm,

• patient with multiple-birth pregnancy,

• patient with a pregnancy at the end of a long course of medical assisted procreation,

• patient with chronic respiratory disease.

Related Conditions & MeSH terms

• Congenital Diaphragmatic Hernia
• Gastroschisis
• Hernia
• Hernia, Diaphragmatic
• Hernia, Umbilical
• Hernias, Diaphragmatic, Congenital
• Omphalocele

Intervention

Diagnostic Test:
• Functional magnetic resonance imaging - Blood Oxygenation Level Dependent
First Functional magnetic resonance imaging - Blood Oxygenation Level Dependent sequence under ambient air. Oxygenation of 5 minutes at a rate of 12 l / min. Second Functional magnetic resonance imaging - Blood Oxygenation Level Dependent sequence.

Locations

Country	Name	City	State
France	Hôpital Necker-Enfants Malades	Paris

Sponsors (2)

Lead Sponsor	Collaborator
Assistance Publique - Hôpitaux de Paris	Filière des Maladies Rares Abdomino-THOraciques : FIMATHO

Country where clinical trial is conducted

France, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Value of the Blood Oxygenation Level Dependent of the fetal lung	Regions of interest (ROI) were manually identified on MRI images, with the largest possible homogenous 2D area. For the lungs, the ROIs were delineated at the maximal chest circumference, delineating the right lung, the left lung.; Changes in haemoglobin concentration will be evaluated by the variation in transverse R2* signal induced by oxygenation in the delimited ROI.; The BOLD response will be calculated for each case as the difference between normoxic and hyperoxic period (?R2*) normalized by normoxic value: ?R2* = [R2*(norm)-R2*(hyper)] / R2*(norm).	30 months
Primary	Postnatal respiratory evolution	Duration of mechanical ventilation	30 months
Secondary	Postnatal survival	Survival rate at 30 days after birth	30 months
Secondary	Duration of oxygen dependence	Total days of oxygen requiring	30 months
Secondary	Length of hospitalization	Total days of the neonatal hospitalization before discharge	30 months