The Lung Flute - An Acoustic Device for Airway Clearance
Introduction[edit | edit source]
It is a handheld device that uses sound waves to mobilize and clear secretions. It is tubular with a plastic mouthpiece at one end and a Mylar reed attached to it, that flutters during use.[1]
Mechanism of Action[edit | edit source]
The Mylar reed is flared on the other end to increase the air mass within the device. This provides acoustic impedance. When the device is being used, the Mylar reed will oscillate at a frequency that matches the resonance frequency of pulmonary secretions (16-25Hz). Thus, the viscosity of these secretions is reduced by mechanical vibrations resulting from the sound waves. Additionally, these vibrations will also facilitate the action of the mucociliary escalator system, which will mobilize the loose and thin mucus, to ensure optimal bronchial hygiene by easier and more effective expectoration.[1]
Method of Use[edit | edit source]
First, perform a deep inhalation. Then, place lips around the mouthpiece. Exhale forcefully through the Lung Flute® as if trying to blow out a candle. After that, remove the mouthpiece and quickly inhale again. Now, put the mouthpiece back in the mouth, and blow gently through the Lung Flute.
Remove the mouthpiece again and wait 5 seconds, taking several normal breaths.
For best results, blow into the Lung Flute® for up to 20 sets of two blows per set. (Begin slowly and build up the number of repetitions over time.)
Approximately 5 minutes after the session has ended, mucus will have collected at the back of the throat and vigorous coughing may occur. Thinned mucus may collect at the back of the throat for several hours after the session, which is normal. A drink of water will wash away the mucus and prevent minor throat irritation.
Indications[edit | edit source]
The Lung Flute® is indicated for the following conditions:
- COPD
- Asthma
- Emphysema
- Chronic Bronchitis
- Bronchietctasis
- Cystic Fibrosis
- Primary Ciliary Dyskinesia
- Respiratory infections and Pneumonia
- Seasonal respiratory influenza
Evidence[edit | edit source]
The Lung Flute® is equivalent to Acapella in therapeutic efficacy.
