Safety and Efficacy of Fetoscopic Endoluminal Tracheal Occlusion in Congenital Diaphragmatic Hernia

August 25, 2025 updated by: Raphael Sun, Oregon Health and Science University

Infant Survival and Long-term Outcomes Following Fetoscopic Endoluminal Tracheal Occlusion in Severe Left and Right Congenital Diaphragmatic Hernia, A Phase III Trial

The purpose of this study is to evaluate the safety and efficacy of Fetoscopic Endoluminal Tracheal Occlusion (FETO) in cases of severe Congenital Diaphragmatic Hernia (CDH).

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

This is an un-blinded, non-randomized, double-arm phase III clinical trial designed to evaluate the safety and efficacy of Fetoscopic Endoluminal Tracheal Occlusion in cases of severe Congenital Diaphragmatic Hernia (CDH) and intrathoracic liver herniation. Patients in the intervention arm will undergo balloon insertion into the fetal trachea between 27 and 30 weeks of gestation. Fetoscopic removal of the balloon occlusion will be performed at 34 weeks gestation.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
80

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.
  • Name: Women's Health Research Unit Department of OB/GYN
  • Phone Number: 503-494-3666
  • Email: whru@ohsu.edu

Study Locations

  • United States
    • Oregon
      • Portland, Oregon, United States, 97239
        • Oregon Health & Science University

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Pregnant person age 18 years or older
  • Singleton pregnancy
  • Normal fetal karyotype with confirmation by culture results, Chromosomal Microarray (CMA) with non-pathological variants, Whole Exome Sequencing (WES) or Whole Genome Sequencing (WGS). Results by florescence in situ hybridization (FISH) will be acceptable if the patient is >26 weeks gestation
  • Gestational age at enrollment less than 29 weeks 6 days
  • Intrathoracic liver herniation
  • Isolated left Congenital Diaphragmatic Hernia (CDH) with Lung to Head Circumference Ratio (LHR) <30% at enrollment OR isolated right CDH with LHR <= 45% at enrollment
  • Cervical length by transvaginal ultrasound >= 20 mm within 24 hours of FETO procedure
  • Psychosocial criteria
  • Able to provide informed consent

Exclusion Criteria:

  • Patient < 18 years of age
  • Multi-fetal pregnancy
  • History of natural rubber latex allergy
  • Preterm labor, cervix shortened (<20 mm at enrollment or within 24 hours of FETO balloon insertion procedure) or uterine anomaly strongly predisposing to preterm labor or placenta previa
  • Psychosocial ineligibility precluding consent
  • Inability to reside within 30 minutes of OHSU
  • Inability to comply with the travel for the follow-up requirements of the trial
  • Lack of a support person (e.g., spouse, partner, mother) available to stay with the patient for the duration of the pregnancy at OHSU.
  • Bilateral CDH, isolated left sided CDL with LHR >= 30% or isolated right side CDH with LHR >45% as determined by ultrasound
  • No intrathoracic liver herniation
  • Additional fetal anomaly and chromosomal abnormalities, associated anomalies recognized to alter survival prognosis (i.e. congenital heart disease) or presence of an underlying genetic syndrome (i.e. Fryns) by ultrasound, MRI, or echocardiogram at the fetal treatment center
  • Maternal contraindication to fetoscopic surgery or severe maternal medical condition in pregnancy
  • History of incompetent cervix with or without cerclage
  • Placental abnormalities (previa, abruption, accreta) known at time of enrollment
  • Maternal-fetal Rh isoimmunization, Kell sensitization or neonatal alloimmune thrombocytopenia affecting the current pregnancy
  • Maternal HIV, Hepatitis-B, Hepatitis-C status positive because of the increased risk of transmission to the fetus during maternal-fetal surgery. If the patient's HIV or Hepatitis status is unknown, the patient must be tested and found to have negative results before enrollment
  • Uterine anomaly such as large or multiple fibroids or Mullerian duct abnormality
  • No safe or technically feasible fetoscopic approach to balloon placement
  • Participation in another intervention study that influences maternal and fetal morbidity and mortality or participation in this trial in a previous pregnancy.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Non-Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Fetal treatment arm
Cases that will undergo Fetoscopic Endoluminal Tracheal Occlusion (FETO) procedure.
Device: Fetoscopic Endoluminal Tracheal Occlusion (FETO) Procedure
FETO procedure involves insertion of a balloon into the fetal trachea under IV sedation with local anesthesia or combined spinal-epidural anesthesia. Balloon removal will take place up to 7 weeks after insertion.
Other Names:
  • FETO
  • GoldBAL2 Detachable Balloon
No Intervention: Expectant management arm
Cases that meet study inclusion criteria but voluntarily decline the Fetoscopic Endoluminal Tracheal Occlusion (FETO) procedure. These cases will undergo the standard of clinical care.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Outcomes of placement and removal of FETO device
Time Frame: Device placement will take place between 27 weeks 0 days and 29 weeks 6 days gestation. Removal will take place between 34 weeks 0 days and 34 weeks 6 days.
Whether placement and removal of the FETO device was successful or not
Device placement will take place between 27 weeks 0 days and 29 weeks 6 days gestation. Removal will take place between 34 weeks 0 days and 34 weeks 6 days.
Compare survival to discharge between FETO and expectant management
Time Frame: Evaluated upon discharge from the NICU (typically 6 months to 1 year after birth)
Evaluate rates of survival to discharge from the neonatal intensive care units (NICU) between fetuses treated with the FETO and those undergoing expectant management
Evaluated upon discharge from the NICU (typically 6 months to 1 year after birth)
FETO Complications
Time Frame: Information about adverse events and complications will take place from study enrollment (gestational age less than 29 weeks) to study conclusion (24 months post-birth)
Evaluate the frequency of maternal and fetal complications associated with the FETO procedure
Information about adverse events and complications will take place from study enrollment (gestational age less than 29 weeks) to study conclusion (24 months post-birth)

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Long-term mortality and morbidities
Time Frame: 6 months, 12 months, 18 months, and 24 months of age
Comparison of rates of long-term mortality and morbidities compared between FETO group and those who underwent expectant management.
6 months, 12 months, 18 months, and 24 months of age

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Oregon Health and Science University

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Raphael Sun, MD, Oregon Health and Science University
  • Principal Investigator: Andrew Chon, MD, Oregon Health and Science University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
September 1, 2025

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
April 1, 2030

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
April 1, 2030

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
March 18, 2025

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
April 20, 2025

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
April 27, 2025

Study Record Updates

Last Update Posted (Estimated)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
September 2, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
August 25, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
August 1, 2025

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • STUDY00027320

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

Yes

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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