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ClinicalTrials.gov Identifier: NCT01580956
Recruitment Status : Completed
First Posted : April 19, 2012
Last Update Posted : May 29, 2013
Information provided by (Responsible Party):

Study Description
Brief Summary:
Variable PSV is a new ventilatory mode which delivered a pressure support "variable" from 0 to 100% variation of the set PSV level.This study aimed to compare the ventilatory behavior, sleep quality and gas exchange between VARIABLE (or Noisy)-PSV and "standard" (or fixed)-PSV during the weaning phase of critically ill patients who required mechanical ventilation.

Condition or disease Intervention/treatment Phase
Acute Respiratory Failure Critical Illness Ventilation Weaning Other: VARIABLE-PSV ventilatory mode Other: STANDARD-PSV ventilatory mode Phase 3

Detailed Description:
Twenty patients will be enrolled. They will be ventilated withVARIABLE-PSV and STANDARD-PSV: for 24 h each in a randomized crossover order. The ventilatory parameters, ventilator/patient asynchrony, gas exchange effects, sleep quality and ventilatory comfort produced by the two ventilation modes will be compared. Before randomisation, a sequence of VARIABLE-PSV will be performed with different level of variation setting to better define the future behavior of the patient under this mode during the 24 h of Variable-PSV.

Study Design

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 20 participants
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Single (Participant)
Primary Purpose: Treatment
Official Title: Evaluation a New Ventilatory Modes: VARIABLE-PSV: a Randomized Controlled Cross-over Study: the " VARIABLE-PSV" Study
Study Start Date : April 2012
Primary Completion Date : August 2012
Study Completion Date : August 2012

Arms and Interventions

Arm Intervention/treatment
VARIABLE-PSV ventilatory mode Other: VARIABLE-PSV ventilatory mode
The two ventilatory modes will be studied during 24h in intubated patients in random order.
STANDARD-PSV ventilatory mode Other: STANDARD-PSV ventilatory mode
The two ventilatory modes will be studied during 24h in intubated patients in random order.

Outcome Measures

Primary Outcome Measures :
  1. Oxygenation in each ventilatory mode [ Time Frame: after 24h of mechanical ventilation in each mode ]
    We will performed arterial blood gases and oxygenation wil be evaluated by the PaO2/FiO2 ration.

Secondary Outcome Measures :
  1. Ventilatory comfort [ Time Frame: during 24h in each mode ]
    Comfort zone is defined as previously reported in some papers as considered adequate ventilation : 6 < tidal volume < 10 ml/kg, ETCO2 < 55 mmHg and < 65 mmHg for COPD patients and 12 < Respiratory rate < 35 cycles/min.

  2. Feasibility [ Time Frame: during the 24 hours ]
    Evaluation of time spent in each mode during the 24 hours of ventilation without any side effects and switch for another ventilatory mode.

  3. Patient/ventilator asynchronism [ Time Frame: during the 24 hours ]
    Evaluation of number of asynchrony evaluated by an Asynchrony Index (AI) in each mode during the 24 hours of mechanical ventilation

  4. Ventilatory effects [ Time Frame: during the 24 hours ]
    Evaluation of machine ventilatory behaviors in each mode during the 24 hours of mechanical ventilation.

  5. Sleep quality [ Time Frame: after the 24 hours ]
    Evaluation of quality of sleep in each mode after the 24h of mechanical ventilation

Eligibility Criteria

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Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • ventilation planned for more than 48 h
  • patient alert and calm corresponding to a Richmond Agitation-Sedation Scale (RASS) between -2 and 0
  • Age > or equal 18
  • Surrogate decision maker's consent

Exclusion Criteria:

  • Clinical instability for any reason.
  • Life support withdrawal code
  • Patient under tutelage
  • Pregnancy
  • No French health insurance
Contacts and Locations

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01580956

Department of Anesthesiology & Critical Care, St Eloi University Hospital
Montpellier, France, 34000
Sponsors and Collaborators
University Hospital, Montpellier
More Information

Responsible Party: University Hospital, Montpellier
ClinicalTrials.gov Identifier: NCT01580956     History of Changes
Other Study ID Numbers: UF 8897
First Posted: April 19, 2012    Key Record Dates
Last Update Posted: May 29, 2013
Last Verified: April 2012

Keywords provided by University Hospital, Montpellier:
Acute respiratory failure
Critical illness
Mechanical ventilation
Ventilation weaning
Intensive Care Unit
Variable (NOISY) PSV

Additional relevant MeSH terms:
Respiratory Insufficiency
Critical Illness
Respiratory Distress Syndrome, Adult
Respiration Disorders
Respiratory Tract Diseases
Disease Attributes
Pathologic Processes
Lung Diseases