Neurally Adjusted Ventilatory Assist for Neonates With Congenital Diaphragmatic Hernias

NCT ID: NCT05839340

Last Updated: 2023-06-01

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

UNKNOWN

Clinical Phase

NA

Total Enrollment

18 participants

Study Classification

INTERVENTIONAL

Study Start Date

2023-05-26

Study Completion Date

2024-06-01

Brief Summary

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Congenital Diaphragmatic Hernias (CDH) are typically repaired surgically in the first few days of a neonate's life. Following surgical repair, infants usually require ventilatory support to ensure adequate oxygenation. Traditionally assist control ventilation (ACV) has been used to support neonates with CDH. Due to delivering a fixed pressure of oxygen, ACV has been associated with barotrauma and long-term lung damage. A more recent approach to ventilation is non-invasive neurally adjusted ventilatory assist (NIV-NAVA). NIV-NAVA uses electrical signals of the diaphragm to deliver a proportional pressure of oxygen. Our dual-centre randomised cross-over trial aims to investigate the efficacy of NIV-NAVA compared to ACV for supporting neonates with CDH.

Detailed Description

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Background:

Congenital Diaphragmatic Hernias (CDH) are typically repaired surgically in the first few days of a neonate's life. Following surgical repair, infants usually require ventilatory support to ensure adequate oxygenation. Traditionally assist control ventilation (ACV) has been used to support neonates with CDH. Due to delivering a fixed pressure of oxygen, ACV has been associated with barotrauma and long-term lung damage. A more recent approach to ventilation is non-invasive neurally adjusted ventilatory assist (NIV-NAVA). NIV-NAVA uses electrical signals of the diaphragm to deliver a proportional pressure of oxygen. Evidence suggests that NAVA may reduce physiological parameters associated with lung pressure and hence reduce the risk of iatrogenic lung injury.

Aims:

Our aim is to compare the oxygenation index (OI) of neonates with CDH, ventilated with ACV and NIV-NAVA. The OI is calculated as the fractured of inspired oxygen x mean airway pressure x partial pressure of oxygen/100. The oxygenation index is used as a marker of hypoxic respiratory failure in infants with CDH and forms the basis of the criteria to administer nitric oxide.

Methods:

Our investigation is a dual-centre randomised cross-over trial. Infants will be identified and parents counselled in the first few days following delivery. Neonates that meet inclusion criteria will be randomised to receive either NIV-NAVA or ACV first, followed by the other method of ventilation. Infants will be stabilised on ACV one-hour prior to entering the trial. On entry into the trial, they will receive 4-hours of each ventilatory method with a 20-minute stabilisation break in between.

Conditions

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Congenital Diaphragmatic Hernia

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

CROSSOVER

Dual Centre Randomised Cross-Over Trial. Infants that meet inclusion criteria will be randomised to be ventilated with either NIV-NAVA or ACV for four hours, followed by the second mode of ventilation. There will be a 20-minute stabilisation period between ventilatory methods.
Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Due to practical limitations, the trial will be open label.

Study Groups

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Neurally Adjusted Ventilatory Assist

Infants will first be ventilated with NAVA for four hours. Following this, they will undergo a 20-minute stabilisation period prior to ventilating with assist control ventilation (ACV).

Group Type EXPERIMENTAL

Neurally Adjusted Ventilatory Assist

Intervention Type DEVICE

NAVA uses electrical signals of the diaphragm to deliver a proportional pressure of oxygen, to which proportion is set by the clinician as the NAVA level.

Assist Control Ventilation

Intervention Type DEVICE

ACV delivers fixed oxygen pressure set by the clinician at the start of each inspiratory breath.

Assist Control Ventilation (ACV)

Infants will first be ventilated with ACV for four hours. Following this, they will undergo a 20-minute stabilisation period prior to ventilating with non-invasive neurally adjusted ventilatory assist.

Group Type EXPERIMENTAL

Neurally Adjusted Ventilatory Assist

Intervention Type DEVICE

NAVA uses electrical signals of the diaphragm to deliver a proportional pressure of oxygen, to which proportion is set by the clinician as the NAVA level.

Assist Control Ventilation

Intervention Type DEVICE

ACV delivers fixed oxygen pressure set by the clinician at the start of each inspiratory breath.

Interventions

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Neurally Adjusted Ventilatory Assist

NAVA uses electrical signals of the diaphragm to deliver a proportional pressure of oxygen, to which proportion is set by the clinician as the NAVA level.

Intervention Type DEVICE

Assist Control Ventilation

ACV delivers fixed oxygen pressure set by the clinician at the start of each inspiratory breath.

Intervention Type DEVICE

Other Intervention Names

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Assist Control Ventilation

Eligibility Criteria

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Inclusion Criteria

* Infants born with congenital diaphragmatic hernia more than 34-weeks gestation

Exclusion Criteria

* Receiving Nitric Oxide
* Requiring an FIO2 more than 80% to maintain SpO2: 85-95%.
* Severe chromosomal abnormality
* Severe cardiac anomalies requiring corrective surgery
* Renal anomalies
* Skeletal deformities suspected to impede thoracic or lung development
* Severe central nervous system anomalies suspected to impede diaphragmatic signalling
* Use of neuromuscular blocking agents
* Contraindication to nasogastric tube insertion
Minimum Eligible Age

1 Minute

Maximum Eligible Age

28 Days

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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St George's, University of London

OTHER

Sponsor Role collaborator

King's College Hospital NHS Trust

OTHER

Sponsor Role lead

Responsible Party

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Anne Greenough

Professor of Neonatology and Clinical Respiratory Physiology

Responsibility Role PRINCIPAL_INVESTIGATOR

Locations

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Kings College Hospital

London, , United Kingdom

Site Status

St. George's University Hospital

London, , United Kingdom

Site Status

Countries

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United Kingdom

References

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Poole G, Harris C, Shetty S, Dassios T, Jenkinson A, Greenough A. Study protocol for a randomised cross-over trial of Neurally adjusted ventilatory Assist for Neonates with Congenital diaphragmatic hernias: the NAN-C study. Trials. 2024 Jan 20;25(1):72. doi: 10.1186/s13063-023-07874-0.

Reference Type DERIVED
PMID: 38245741 (View on PubMed)

Other Identifiers

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319769

Identifier Type: -

Identifier Source: org_study_id

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