Related Experiment Video
Updated: Oct 3, 2026

Phase-Resolved Functional Lung MRI for Pulmonary Ventilation and Perfusion (V/Q) Assessment
Published on: August 9, 2024
Restoration of lung volume using the Flutter VRP1 or breathing exercise
Alice Jones1, Eric Tse, Leo Cheung
1Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
Abstract:
A method of chest wall restriction imposed for 30 minutes demonstrated a mean (SD) decrease of 42 (14) per cent in forced vital capacity (FVC) during restrictor application. Following the application of chest wall restriction, 30 healthy subjects then underwent a 15 minute treatment with either Flutter VRP1 (Flutter) or breathing exercise with end-inspiratory hold (BE) after chest wall restriction release. Both Flutter and BE applied for 15 minutes immediately restored FVC to pre-restriction values. Tidal breathing control subjects demonstrated a clinically small but statistically significant decrease in FVC of 3 per cent (p<0.001). Visual analogue assessment of each treatment technique showed BE to be the subject- preferred technique for lung volume restoration. This study shows that in normal subjects, Flutter and BE are equally effective in restoring FVC and superior to tidal breathing.
Related Concept Videos
Respiratory Volumes
Tidal Volume (TV) Tidal volume (TV) is the air inhaled or exhaled in a...
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...
Pulmonary Ventilation: Inhalation
Boyle's law becomes particularly pertinent when examining respiratory...
Pulmonary Cycle: Exhalation
Flail Chest-II
Assessment:
1. Clinical Evaluation:
History:
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...
