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Patient-ventilator Asynchrony During Mechanical Invasive Assisted-ventilation in Pediatric Patients (NavPed-Inv)

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified August 2010 by University Hospital, Geneva.
Recruitment status was:  Recruiting
Information provided by:
University Hospital, Geneva Identifier:
First received: August 31, 2010
Last updated: NA
Last verified: August 2010
History: No changes posted

The purpose of this study is to document the prevalence and type of asynchronies incidence during invasive mechanical ventilation in pediatric patients breathing under pressure support.

And to observe the impact of adjusting the expiratory trigger setting on asynchronies, and compare these incidences with asynchronies measured in pediatric patient breathing under NAVA system (Neurally Adjusted Ventilatory Assist).

Condition Intervention
Respiration, Artificial
Other: Pressure Support
Device: NAVA

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Open Label
Primary Purpose: Basic Science
Official Title: Patient-ventilator Asynchrony During Mechanical Invasive Assisted-ventilation in Pediatric Patients

Further study details as provided by University Hospital, Geneva:

Primary Outcome Measures:
  • asynchronies [ Time Frame: 12 months ]

    Asynchronies during mechanical ventilation are the following: Auto triggering, double triggering, late cycling, premature cycling and ineffective effort.

    all ventilatory parameters are recorded under Pressure support (3 phases: 3 levels of expiratory trigger setting, initial, +10% and -10%, 15 min, 5 min and 5 min respectively) and NAVA (1 phase, 20 min).

    Asynchronies will be determined by measuring each ventilatory cycle of all recordings.

Estimated Enrollment: 40
Study Start Date: June 2010
Estimated Study Completion Date: June 2011
Estimated Primary Completion Date: June 2011 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Pressure support

in this arm, pressure support will be recorded under 3 conditions:

  • with the initial Expiratory Trigger Setting (ETS)
  • with ETS +10%
  • with ETS -10%
Other: Pressure Support
Ventilation under pressure support
Experimental: NAVA
Neurally Adjusted ventilatory Assist is a ventilation mode where the ventilator is piloted by the electrical activity of the diaphragm Ventilation is triggered and cycled off by the electrical activity of the diaphragm, the pressure delivered being proportional to this activity.
Device: NAVA
Ventilation under NAVA

Detailed Description:

Two sessions will be recorded, one in PSV, one with NAVA, delivered in a random order after being sure the infant is calm and comfortable, according to his parents and/or the nurse in charge.

Criteria for initiating invasive ventilation and to start PSV will follow the usual practice guidelines of the unit.

Ventilation parameters in PS will be adjusted by the clinician in charge of the patient, as usual based on clinical observation. Investigators will not interfere with ventilator settings. Ventilation will be applied via an endotracheal tube, uncuffed for the majority (if infant < 5 years), according to commonly applied guidelines in this unit.

One 15 minutes session will be recorded, after being sure the infant is calm and comfortable according to the parents and/or the nurse in charge. Then the clinician in charge of the patient will modify the ETS, first decreasing it of 10% below the initial set value, and will be recorded the following 5 minutes after stabilization and secondly increasing it of 10% above the initial set value, and will be recorded the following 5 minutes after stabilization.

NAVA will be set to deliver initially the same peak pressure (comparable level of assist) than during the initial PS period. Same PEEP will be delivered in both modes. This is possible with a pre-visualization window, allowing adjustments before switching to the NAVA mode. Nava ventilation will be recorded during 20 minutes.

The 2 sessions, Pressure support and Nava, will be recorded consecutively.


Ages Eligible for Study:   up to 12 Years   (Child)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • all consecutive patients from 4 weeks to 12 years (post natal interm infants) admitted to the pediatric intensive care unit (PICU) and receiving mechanical ventilation in pressure support ventilation

Exclusion Criteria:

  • Non treated pneumothorax
  • Hemodynamic instability
  • At least 2 hours following the admission in the PICU in post cardiac surgery
  • FiO2 > 0.6
  • Poor short term prognosis (defined as a high risk of death in the next seven days)
  • contraindication for gastric tube or obtention of a reliable EMGdi signal
  • Known esophageal problem (hiatal hernia, esophageal varicosities)
  • Active upper gastro-intestinal bleeding or any other contraindication to the insertion of a naso-gastric tube
  • Neuromuscular disease
  • Patients with a pacemaker
  Contacts and Locations
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Please refer to this study by its identifier: NCT01193023

Contact: Laurence Vignaux 0041223727448
Contact: Peter Rimensberger Tél: + 41-22 37 24 730

University hospital of Geneva Recruiting
Geneva, Switzerland, 1211
Contact: Laurence Vignaux    0041223727448   
Contact: Peter Rimenberger    00412237 24 730   
Principal Investigator: Peter Rimensberger, MD         
Sub-Investigator: Laurence Vignaux         
Sub-Investigator: Thomas Jaecklin, MD         
Sub-Investigator: Serge Grazioli, MD         
Sub-Investigator: Lise Piquilloud         
Sub-Investigator: Philippe Jolliet, Pr         
Sub-Investigator: Didier Tassaux, MD         
Sponsors and Collaborators
University Hospital, Geneva
Principal Investigator: Peter Rimensberger, MD Ûniversity hospital of Geneva
  More Information

Responsible Party: Dr Peter Rimensberger, neonatology and intensive care units, university hospital of Geneva Identifier: NCT01193023     History of Changes
Other Study ID Numbers: HUG-matped 09-253
Study First Received: August 31, 2010
Last Updated: August 31, 2010

Keywords provided by University Hospital, Geneva:
Prospective Studies
Humans, pediatric
Positive-Pressure Respiration/methods*
Respiration, Artificial/methods*
Intensive Care
Intensive Care Units/statistics & numerical data*
Respiration, Artificial/statistics & numerical data*
Patients/statistics & numerical data*
Respiratory Muscles/innervation processed this record on May 22, 2017