Fetoscopic Endoluminal Tracheal Occlusion (FETO) for Severe Left Diaphragmatic Hernia (CDH)

Congenital Diaphragmatic Hernia Clinical Trial

— FETO  

Official title:

Study of Fetoscopic Endoluminal Tracheal Occlusion (FETO) in Fetuses With Severe Left Congenital Diaphragmatic Hernia (CDH)

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT02710968
• Other study ID #: IRB00054901
• Status: Recruiting
• Phase: N/A
• Start date: August 2015
• Est. completion date: March 2025

Study information

• Verified date: October 2023
• Source: Johns Hopkins University
• Contact: Ahmet A Baschat, MD
• Phone: 443 287 9549
• Email: abascha1[@]JHMI.edu
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Despite advances in prenatal diagnosis and postnatal therapies, including extracorporeal membrane oxygenation (ECMO), inhaled nitric oxide therapy, and ventilator strategies that minimize ventilator-induced lung injury, morbidity and mortality rates for babies with congenital diaphragmatic hernia (CDH) remain high. The survival relates to the degree of prenatal lung compression and the subsequent impairment of pulmonary function following delivery. Prenatal assessment by ultrasound or magnetic resonance imaging allows to estimate the severity by relating the circumference of the lung contralateral to the hernia to the fetal head circumference lung to head ratio (LHR) and by noting the degree of upward herniation of the liver. Based on the observed to expected lung to head ratio (O/E LHR), prenatally diagnosed congenital diaphragmatic hernia can be prognostically assessed. While overall survival of congenital diaphragmatic hernia is approximately 60%, an O/E LHR <25% is associated with survival between 11-24%.

The rationale for fetal therapy in severe congenital diaphragmatic hernia is to restore adequate lung growth for neonatal survival. Prenatal tracheal occlusion obstructs the normal egress of lung fluid during pulmonary development leading to increased lung tissue stretch, increased cell proliferation, and accelerated lung growth. European colleagues have developed intrauterine endoscopic techniques (fetoscopy) to position and remove endoluminal tracheal balloons in utero (fetoscopic endotracheal occlusion = FETO). Recently, the Belgium group published summary results of FETO showing an improved survival in 175 patients with isolated left CDH from 24% to 49%. We hypothesize that FETO can be performed and may increase survival and decrease morbidity when compared to standard prenatal care for the treatment of severe CDH in the most severe group of fetuses with left CDH (O/E LHR < 30%). FETO therapy will be considered in two subgroups: those with and O/E LHR <25% (severe group) and those with an O/E between 25 to <30% (less severe group).

Description:

Comprehensive fetal evaluations will be completed at the Johns Hopkins Center for Fetal Therapy to confirm eligibility. This includes an ultrasound, magnetic resonance imaging, a fetal echocardiogram and fetal genetic studies to identify cases with isolated CDH. Participant must be willing to remain under supervision of the Center for Fetal Therapy at the Johns Hopkins Hospital while the fetal airway is occluded.

Participants will undergo FETO with standardized preoperative, intraoperative, post-operative care, and delivery. The FETO will be timed between 27+0 to 29+6 weeks gestation for fetuses with an O/E LHR <25% and between 30+0 to 31+6 weeks gestation for fetuses with an O/E LHR between 25% to <30%. Fetal analgesia and immobilization will consist of fentanyl, atropine and vecuronium. A 10 Fr cannula, 1.3 mm fetoscope within a 3.3 mm sheath (Karl Storz, Tuttlingen, Germany), and a detachable balloon occlusion (BALTACCI-BDPE, Balt, Montmorency, France) system will be used.

Serial ultrasound measurements of lung volume and LHR will begin within 24-48 hours following surgery and continue weekly. Amniotic fluid level and membrane status will also be monitored at weekly intervals. Ultrasonography for fetal growth will be performed every 4 weeks.

All discharged participants and their support person need to remain within 30 minutes of the surgery center until delivery to permit standardized postoperative management. The social worker at the Center for Fetal Therapy will serve as the participant advocate and assist families in identifying subsidized appropriate accommodation as required. Participants will be on modified bed rest for the first 2 weeks post discharge, but subsequently allowed to graduate to moderate activity if the uterus is quiescent.

At 34+0 weeks to 34 + 6 weeks, participants will undergo removal of the tracheal balloon. Balloon retrieval can be either by in utero puncture by ultrasound-guided percutaneous needling or fetoscopic retrieval. In the event there is a need for emergent balloon removal prior to 34 weeks due to the development of preterm labor, shortening of the cervix, preterm rupture of membranes, abnormally vigorous lung response, or development of fetal hydrops, delivery by EXIT or cesarean section will be performed. If percutaneous puncture of balloon is unsuccessful prior to delivery, immediate bronchoscopy and establishment of airway will be performed. Maternal corticosteroids (betamethasone 12 mg intramuscularly and repeated once at 24 hours) will be administered 48 hours prior to fetoscopic balloon removal (due to risks of preterm delivery associated with instrumentation) or for impending preterm delivery.

Timing for induction of labor at 37 weeks to 39 weeks will depend upon favorable status of the cervix. Cesarean section will be based upon standard obstetrical indications. In regards to postnatal care, a resuscitation team from neonatology and pediatric surgery will be present at delivery. A standardized protocol will be utilized for postnatal care, using lung protection strategy.

Continued follow-up of children until age 2 is planned as the current standard of care. These follow-ups may include bronchoscopy, brain imaging, audiology exam, pulmonary function testing, chest radiograph and developmental assessment.

The study duration per mother and child will be up to 877 days, with up to 82 days screening, up to 55 days in the intervention phase, and 744 days in delivery and follow-up.

Follow-up will be conducted from birth to 24 months of age at which time the study will conclude.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 35
• Est. completion date: March 2025
• Est. primary completion date: March 2025
• Accepts healthy volunteers: No
• Gender: Female
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Pregnant women age 18 years and older, who are able to consent.

• Singleton pregnancy.

• Anatomically and chromosomally normal fetus.

• Left sided diaphragmatic hernia with liver up.

• SEVERE pulmonary hypoplasia with O/E LHR < 30%.

• In patients with O/E LHR 25% to <30%, enrollment prior to gestational age 30 weeks+0 days to 31 weeks+6 days.

• In patients with O/E LHR <25%, enrollment prior to gestational age 27 weeks+0 days to 29 weeks+6 days.

Exclusion Criteria:

• Pregnant women < 18 years.

• Maternal contraindication to fetoscopic surgery or severe maternal medical condition in pregnancy.

• Technical limitations precluding fetoscopic surgery.

• Women with history of natural rubber latex allergy.

• Preterm labor, cervix shortened <15 mm within 24 hours prior to the FETO balloon insertion or uterine anomaly strongly predisposing to preterm labor, placenta previa.

• Diaphragmatic hernia: right-sided or bilateral, major associated anomalies, isolated left-sided with the O/E LHR = 30%.

Related Conditions & MeSH terms

• Congenital Diaphragmatic Hernia
• Hernia
• Hernia, Diaphragmatic
• Hernias, Diaphragmatic, Congenital

Intervention

Device:
• 11540KE and Balt Goldbal 2 balloon
Fetoscopic tracheal occlusion will be performed using above devices and reversed after 4-5 weeks.

Locations

Country	Name	City	State
United States	Johns Hopkins Center for Fetal Therapy	Baltimore	Maryland

Sponsors (1)

Lead Sponsor	Collaborator
Johns Hopkins University

Country where clinical trial is conducted

United States, 

References & Publications (44)

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Deprest J, Nicolaides K, Done' E, Lewi P, Barki G, Largen E, DeKoninck P, Sandaite I, Ville Y, Benachi A, Jani J, Amat-Roldan I, Gratacos E. Technical aspects of fetal endoscopic tracheal occlusion for congenital diaphragmatic hernia. J Pediatr Surg. 2011 Jan;46(1):22-32. doi: 10.1016/j.jpedsurg.2010.10.008. — View Citation

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Gallot D, Boda C, Ughetto S, Perthus I, Robert-Gnansia E, Francannet C, Laurichesse-Delmas H, Jani J, Coste K, Deprest J, Labbe A, Sapin V, Lemery D. Prenatal detection and outcome of congenital diaphragmatic hernia: a French registry-based study. Ultraso — View Citation

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Hedrick HL, Kaban JM, Pacheco BA, Losty PD, Doody DP, Ryan DP, Manganaro TF, Donahoe PK, Schnitzer JJ. Prenatal glucocorticoids improve pulmonary morphometrics in fetal sheep with congenital diaphragmatic hernia. J Pediatr Surg. 1997 Feb;32(2):217-21; discussion 221-2. doi: 10.1016/s0022-3468(97)90182-2. — View Citation

Hedrick MH, Estes JM, Sullivan KM, Bealer JF, Kitterman JA, Flake AW, Adzick NS, Harrison MR. Plug the lung until it grows (PLUG): a new method to treat congenital diaphragmatic hernia in utero. J Pediatr Surg. 1994 May;29(5):612-7. doi: 10.1016/0022-3468 — View Citation

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Jani JC, Nicolaides KH, Gratacos E, Vandecruys H, Deprest JA; FETO Task Group. Fetal lung-to-head ratio in the prediction of survival in severe left-sided diaphragmatic hernia treated by fetal endoscopic tracheal occlusion (FETO). Am J Obstet Gynecol. 200 — View Citation

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Quinn TM, Sylvester KG, Kitano Y, Kitano Y, Liechty KW, Jarrett BP, Adzick NS, Flake AW. TGF-beta2 is increased after fetal tracheal occlusion. J Pediatr Surg. 1999 May;34(5):701-4; discussion 704-5. doi: 10.1016/s0022-3468(99)90359-7. — View Citation

Schnitzer JJ, Hedrick HL, Pacheco BA, Losty PD, Ryan DP, Doody DP, Donahoe PK. Prenatal glucocorticoid therapy reverses pulmonary immaturity in congenital diaphragmatic hernia in fetal sheep. Ann Surg. 1996 Oct;224(4):430-7; discussion 437-9. doi: 10.1097/00000658-199610000-00002. — View Citation

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* Note: There are 44 references in all — Click here to view all references

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Successful balloon insertion and removal	The feasibility of performing the procedure, managing the pregnancy during the period of tracheal occlusion, and removal of the device prior to delivery at Johns Hopkins Hospital.	4 to 7 weeks
Secondary	Survival	The neonatal survival of participants receiving FETO expressed as a percentage of the total number of participants undergoing the procedure.	28 days after delivery
Secondary	Percentage of lung growth	The percentage of size increase in the contralateral fetal lung as related to the pre-procedure lung size	4 to 7 weeks