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Fetal Endotracheal Occlusion (FETO) in Severe and Extremely Severe Congenital Diaphragmatic Hernia (FETO)

This study is currently recruiting participants. (see Contacts and Locations)
Verified July 2016 by Baylor College of Medicine
Baylor College of Medicine
Texas Children's Hospital
Information provided by (Responsible Party):
Michael Belfort, Baylor College of Medicine Identifier:
First received: April 13, 2009
Last updated: July 19, 2016
Last verified: July 2016

Congenital diaphragmatic hernia (CDH) occurs when the diaphragm fails to fully fuse and leaves a portal through which abdominal structures can migrate into the thorax. In the more severe cases, the abdominal structures remain in the thoracic cavity and compromise the development of the lungs. Infants born with this defect have a decreased capacity for gas exchange; mortality rates after birth have been reported between 40-60%. Now that CDH can be accurately diagnosed by mid-gestation, a number of strategies have been developed to repair the hernia and promote lung tissue development.

Fetal tracheal occlusion is one technique that temporarily closes the herniated area with the Goldvalve balloon to allow the lungs to develop and increase survival at birth. This is a pilot study of a cohort of fetuses affected by severe CDH that will undergo FETO to demonstrate the feasibility of performing the procedure, managing the pregnancy during the period of tracheal occlusion, and removal of the device prior to delivery at BCM/Texas Children's Hospital (TCH). It is anticipated that fetal tracheal occlusion plug-unplug procedure will improve mortality and morbidity outcomes as compared with current management, but this is not a primary endpoint of the feasibility study. We will perform 20 FETO procedures on fetuses diagnosed prenatally with severe and extremely severe CDH.

Condition Intervention
Congenital Diaphragmatic Hernia
Device: Goldballoon Detachable Balloon and delivery microcatheter

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: Open Label
Official Title: A Prospective Study of the Effectiveness of Fetal Endotracheal Occlusion (FETO) in the Management of Severe and Extremely Severe Congenital Diaphragmatic Hernia

Resource links provided by NLM:

Further study details as provided by Baylor College of Medicine:

Primary Outcome Measures:
  • Feasibility [ Time Frame: Study Duration ]

Estimated Enrollment: 15
Study Start Date: March 2010
Estimated Study Completion Date: December 2021
Estimated Primary Completion Date: December 2016 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Fetal Endotracheal Occlusion
Placement of the Goldballoon tracheal balloon using the plug/unplug method.
Device: Goldballoon Detachable Balloon and delivery microcatheter
Between 27+0/7 - 29+ 6/7 weeks gestation for severe CDH and can be as early as 22+0/7 weeks gestational age for those deemed as "extremely severe" cases of CDH, placement of the Goldvalve detachable balloon. Balloon retrieval will be planned for between 32+0/7 and 34+6/7 weeks or no longer than 10 weeks after balloon placement at the discretion of the FETO center.
Other Names:
  • GOLDBAL4 Goldballoon
  • BALTACCIBDPE100 delivery microcatheter

Detailed Description:


Women carrying fetuses with severe or extremely severe CDH and a normal karyotype will undergo routine clinical evaluation. The fetuses will be 27+0/7 to 29+6/7 weeks of gestational age for severe CDH and can be as early as 22+0/7 weeks gestational age for those deemed as "extremely severe" cases of CDH. They will have ultrasound and/or MRI evaluation to rule out other anomalies, calculation of the LHR from ultrasound measurements, echocardiography, and detailed obstetric/perinatal consultation. Patients who meet the eligibility criteria will be extensively counseled, and those who wish to participate will provide written, informed consent for the study.


The procedure will be performed under spinal anesthesia or local anesthesia with intravenous sedation. The technique of fetal endoscopic tracheal occlusion has been described. Using standard technique, a cannula loaded with a pyramidal trocar will be inserted into the amniotic cavity and a fetoscope or flexible operating endoscope will be passed through the cannula into the amniotic fluid. The scope will be guided into the fetal larynx either through a nostril and then via the nasal passage or through the fetal mouth, and then through the fetal vocal cords with the aid of both direct vision through the scope and cross-sectional ultrasonographic visualization. A detachable latex balloon will be placed in the fetal trachea midway between the carina and the vocal cords. The balloon will be inflated with isosmotic contrast material so that it fills the fetal trachea.


The mothers will be discharged once stable. Serial measurements of sonographic lung volume and LHR will begin within 24-48 hours following surgery and continue weekly by targeted ultrasound evaluation. Amniotic fluid level and membrane status will also be monitored at weekly intervals. Comprehensive ultrasonography for fetal growth will be performed every four weeks. All discharged patients will stay within 30 minutes of TCH to permit standardized postoperative management and emergent retrieval of the balloon in the event of preterm labor or premature rupture of membranes prior to the scheduled removal.

Balloon retrieval will be planned at between 32+0/7 and 34+6/7 weeks at the discretion of the FETO center. The patient will need to commit to remaining in 30 minutes of Texas Children's Hospital Pavilion for Women until the balloon is retrieved.

After removal of the balloon, patients will have the choice of delivering at Texas Children's Hospital- Women's Pavilion with the CDH managed and repaired at TCH, or returning to their obstetrician for delivery with subsequent repair of the CDH by the pediatric surgeons at their referring facility. Given the severity of the CDH, the baby will need to be delivered in a facility that has the capability of immediate pediatric surgery services.


Ages Eligible for Study:   18 Years to 45 Years   (Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   No


  • Patient is a pregnant woman between 18 and 45 years of age
  • Singleton pregnancy
  • Confirmed diagnosis of severe or extremely severe left, right or bilateral CDH of the fetus

Severe CDH: -Fetal liver herniated into the left hemithorax -Lung-head ratio (LHR) is equal to or greater than 0.71 to < 1.0 calculated between 27+0/7 and 29+6/7 weeks' gestation

Extremely Severe CDH: -At least 1/3rd of the liver parenchyma herniated into the thoracic cavity -Lung-head ratio (LHR) is < 0.71 calculated between 22+0/7 and 29+6/7 weeks' gestation

  • Normal fetal echocardiogram or echocardiogram with a minor anomaly (such a small VSD) that in the opinion of the pediatric cardiologist will not affect postnatal outcome
  • Normal fetal karyotype
  • The mother must be healthy enough to have surgery
  • Patient provides signed informed consent that details the maternal and fetal risks involved with the procedure
  • Patient willing to remain in Houston for the duration following the balloon placement until delivery
  • Signed informed consent


  • Contraindication to abdominal surgery, fetoscopic surgery, or general anesthesia
  • Allergy to latex
  • Allergy or previous adverse reaction to a study medication specified in this protocol
  • Preterm labor, preeclampsia, or uterine anomaly (e.g., large fibroid tumor)
  • Fetal aneuploidy, known structural genomic variants, other major fetal anomalies, or known syndromic mutation
  • Suspicion of major recognized syndrome (e.g. Fryns syndrome) on ultrasound or MRI
  • Maternal BMI >35
  • High risk for fetal hemophilia
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00881660

Contact: Michael Belfort, MD PhD 832 826-7375
Contact: Alicia Brown, MPH 713-798-8949

United States, Texas
Baylor College of Medicine/Texas Children's Hospital Recruiting
Houston, Texas, United States, 77030
Contact: Michael A. Belfort, MD PhD    832-826-7375   
Contact: Anne McCombs    713-798-7888   
Principal Investigator: Michael A. Belfort, MD PhD         
Sub-Investigator: Rodrigo Ruano, MD, Ph         
Sub-Investigator: Oluyinka Olutoye, MB, ChB, PhD         
Sub-Investigator: Olutoyin Olutoye, MB, ChB         
Sub-Investigator: Darrell Cass, MD         
Sub-Investigator: Stephen Welty, MD         
Sub-Investigator: Christopher Cassady, MD         
Sub-Investigator: Timothy Lee, MD         
Sub-Investigator: Alireza Abdollah Shamshirsaz, MD         
Sub-Investigator: Wesley Lee, MD         
Sponsors and Collaborators
Michael Belfort
Baylor College of Medicine
Texas Children's Hospital
Principal Investigator: Michael Belfort, MD, PhD Baylor College of Medicine/Texas Children's Hospital
  More Information


Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Michael Belfort, Chairman and Professor, Baylor College of Medicine Identifier: NCT00881660     History of Changes
Other Study ID Numbers: H-28021 
Study First Received: April 13, 2009
Last Updated: July 19, 2016

Keywords provided by Baylor College of Medicine:
Fetal Tracheal Occlusion
congenital diaphragmatic hernia
FETO plug-unplug
Goldvalve balloon
Severe Congenital Diaphragmatic Hernia
Extremely Severe Congenital Diaphragmatic Hernia

Additional relevant MeSH terms:
Hernia, Diaphragmatic
Hernias, Diaphragmatic, Congenital
Pathological Conditions, Anatomical
Congenital Abnormalities processed this record on February 20, 2017