Related Experiment Video
Updated: Aug 5, 2026

Surfactant Depletion Combined with Injurious Ventilation Results in a Reproducible Model of the Acute Respiratory Distress Syndrome (ARDS)
Published on: April 7, 2021
Acute Respiratory Distress Syndrome: Mechanical Ventilation vs. High-Frequency Percussive Ventilation
Daniel Sagan1,2, Carol Parise3, Imran Mohammed2,4
1Department of Cardiopulmonary Sciences, School of Allied Health Professions, Loma Linda University Health, Loma Linda, California, USA, lluh.org.
High-frequency percussive ventilation (HFPV) improves gas exchange in severe acute respiratory distress syndrome (ARDS) when conventional methods fail. This study shows HFPV is an effective salvage therapy for ARDS patients refractory to standard mechanical ventilation.
Area of Science:
- Critical Care Medicine
- Respiratory Physiology
- Mechanical Ventilation
Background:
- Limited recent research exists on high-frequency percussive ventilation (HFPV).
- HFPV is often used as a last resort for acute respiratory distress syndrome (ARDS) patients when conventional ventilation fails.
- Its efficacy in adult ARDS remains debated.
Purpose of the Study:
- To compare pulmonary gas exchange via arterial blood gas (ABG) values.
- To analyze outcomes in ARDS patients switched from conventional mechanical ventilation to HFPV versus those remaining on conventional ventilation.
Main Methods:
- Retrospective study (2016-2022) analyzing electronic medical records (EMRs) of ARDS patients.
- Compared ABG results before and after initiating HFPV or conventional mechanical ventilation (CMV).
- Evaluated continuous mandatory ventilation (CMV) settings pre- and post-HFPV initiation.
Main Results:
- 351 ARDS patients included (194 CMV, 157 HFPV).
- HFPV group showed improved pH and decreased PaCO2 post-initiation.
- HFPV group demonstrated a more rapid and significant improvement in PaO2 and PF ratio compared to CMV.
Conclusions:
- High-frequency percussive ventilation (HFPV) is effective for adult ARDS.
- HFPV serves as a viable salvage modality when conventional mechanical ventilation is insufficient.
- Results support HFPV use for refractory ARDS cases.
Related Concept Videos
Mechanical Ventilation II: Invasive Ventilation
Negative-Pressure Ventilators
Negative-pressure ventilators create a vacuum around the chest or body to draw air into the lungs, simulating breathing. This method does not require an...
Mechanical Ventilation I: Indication and Settings
Mechanical Ventilation III: Noninvasive Ventilation
Noninvasive Positive-Pressure Ventilation (NIPPV)
Physical Assessment of the Respiratory Tract III: Percussion
Percussion in Respiratory Assessment
Percussion evaluates underlying tissue composition with audible and tactile vibrations,...
Acute Respiratory Failure-V
Ensure that patients are monitored continuously for their response to therapy, including changes in...
Ventilatory Modes
There are three ventilatory modes: full support, partial support, and spontaneous. These are described below.
Full Support Modes
Full support modes include controlled mechanical ventilation, continuous mandatory...
