Comparison Study of High Frequency Percussive Ventilation With Conventional Ventilation

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00308022
Recruitment Status : Unknown
Verified March 2006 by University of Texas Southwestern Medical Center.
Recruitment status was:  Recruiting
First Posted : March 28, 2006
Last Update Posted : September 11, 2006
Information provided by:
University of Texas Southwestern Medical Center

March 24, 2006
March 28, 2006
September 11, 2006
January 2006
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Ventilator Associated Pneumonia
Same as current
Complete list of historical versions of study NCT00308022 on Archive Site
  • Cytokine profiles
  • Length of stay
  • Ventilator Days
Same as current
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Comparison Study of High Frequency Percussive Ventilation With Conventional Ventilation
A Prospective Randomized Controlled Trial Comparing High Frequency Percussive Ventilation With Conventional Mechanical Ventilation Utilizing Protective Lung Strategies in Patients With Acute Lung Injury/Acute Respiratory Distress Syndrome
This study is designed to exam the effects of early management with high frequency percussive ventilation (HFPV) on patients with lung injury. Patients at risk for Acute Respiratory Distress Syndrome (ARDS) will be enrolled and randomized to one of two groups. One group will be managed with HFPV. The second group will be managed with conventional ventilation utilizing lung protective techniques. The primary endpoint of the study is rate of ventilator associated pneumonia. We hypothesized that use of HFPV in patients at risk for the development of ARDS will decrease the rate of ventilator associated pneumonia when compared to patients managed with conventional ventilation.

Specific Aim 1: This prospective randomized trial will enroll 180 patients with ALI/ARDS over a forty-eight month period. One cohort will receive conventional mechanical ventilation adhering to our well defined protocol of protective lung strategies. A second cohort will have these same strategies applied utilizing the VDR/HFPV. Out come measures will include; ICU/Hospital length of stay, pulmonary infectious complications, airway pressure related complications, PaO2/PaCO2 levels, hemodynamic profiles, and ventilators days.

We hypothesize that patients with Acute Lung Injury (ALI )and/or Acute Respiratory Distress Syndrome (ARDS) managed primarily with HFPV will have fewer ventilators days, fewer infectious complications, and shorter ICU/hospital lengths of stay than patients managed with conventional mechanical ventilation techniques, while maintaining similar oxygenation (PaO2), ventilation (PaCO2), metabolic (pH), and hemodynamic (cardiac output) parameters.

ARDS and ALI have been shown to cause elevations in circulating inflammatory mediators as well as local (alveolar) mediators. The presence of increased amounts of both circulating and alveolar cytokines (inflammatory mediators) has been associated with increased mortality in patients with ARDS/ALI. The pulmonary capillary bed is a rich source of these inflammatory cytokines and the effects of ventilator strategies on circulating and compartmentalized (alveolar) cytokine levels may affect outcome.

Specific Aim 2: Circulating and alveolar inflammatory mediators (IL-6, IL-1-beta, IL-10, and TNF-alpha) will be measured, and activation of other markers of increased synthesis of inflammatory mediators (NF-kappa B and p38 map kinase) will be determined in isolated peripheral blood and alveolar leukocytes.

We hypothesize that patients with ALI/ARDS managed with HFPV will have lower levels of circulating and alveolar pro-inflammatory cytokines (IL-6, IL-1-beta and TNF-alpha) as well as less activation of NF-kappa B and p38 MAP kinase from peripheral blood and alveolar leukocytes..

Phase 2
Phase 3
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
  • Respiratory Distress Syndrome, Adult
  • Pneumonia
  • Mechanical Ventilation
Device: High Frequency Percussive Ventilation
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*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Unknown status
Same as current
December 2009
Not Provided

Inclusion Criteria:

  • PaO2/FiO2 < 300 for less than 24 hours (Ratio of Partial pressure of oxygen to Fraction of inspired oxygen)

Exclusion Criteria:

  • Documented Pneumonia,
  • Documented Congestive Heart Failure,
  • Immunosuppression,
  • Enrolled in other interventional trial,
Sexes Eligible for Study: All
18 Years to 65 Years   (Adult)
Contact information is only displayed when the study is recruiting subjects
United States
UTSW IRB 022005-052
Not Provided
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University of Texas Southwestern Medical Center
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Principal Investigator: Randall Friese, MD University of Texas Southwestern Medical Center
University of Texas Southwestern Medical Center
March 2006

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP