August 2026

Using an Acapella Device to Clear Your Lungs

By Your Health Magazine Health Information Team

You can feel mucus rattling in your chest, but repeated coughing leaves you tired without bringing much up. For people with certain long-term lung conditions, an Acapella device may make airway clearance more manageable. The key is using the right resistance, breathing technique, and follow-up cough rather than simply blowing into the mouthpiece as hard as possible.

What Does an Acapella Device Do?

An Acapella is a handheld oscillating positive expiratory pressure device, often shortened to OPEP. As you breathe out through it, the device creates gentle resistance and rapid pressure changes. The resistance helps prevent smaller airways from closing too early during exhalation, while the oscillations help loosen mucus from airway walls. The mucus can then move toward larger airways, where it may be removed with a controlled huff or cough.

A healthcare professional may recommend an Acapella for someone who regularly has difficulty clearing sputum because of bronchiectasis, cystic fibrosis, chronic bronchitis, COPD, or another mucus-producing respiratory condition. It is not intended for every cough or uncomplicated cold. If COPD is part of your diagnosis, reviewing reliable information about COPD symptoms and management can help you understand how airway clearance fits into broader care.

The device does not cure the underlying condition or replace prescribed medication, exercise, pulmonary rehabilitation, or other airway-clearance treatments. Research suggests OPEP therapy can help some people move sputum and manage respiratory symptoms, although results vary by diagnosis and the overall evidence for long-term outcomes remains limited.

Acapella Device: How to Use It Step by Step

Your pulmonologist, respiratory therapist, or physical therapist should select the device, set its resistance, and demonstrate the technique. Different Acapella models have different flow requirements and cleaning directions. The following is a general sequence, not a replacement for your personal treatment plan or the manufacturer’s instructions.

Wash and dry your hands. Check that the device is clean, dry, correctly assembled, and free of cracks or other damage.
Confirm that the resistance dial remains at the setting chosen by your healthcare professional. Do not make routine adjustments on your own.
Sit upright with your neck and shoulders relaxed. If you have been taught a specific postural-drainage position, use that position instead.
Take a slow breath that is slightly deeper than an ordinary breath, without filling your lungs to the point of discomfort.
Hold the breath for approximately two to three seconds if this is comfortable and part of the technique you were taught.
Place the mouthpiece between your teeth and close your lips around it to create a firm seal.
Breathe out steadily through the device. The exhalation should be active but not forceful, usually lasting longer than the breath in.
Keep your cheeks firm and relatively still. You should feel or hear the device oscillating, and you may notice vibrations in your chest.
Stop exhaling before your lungs feel completely empty. Pause and take a few relaxed breaths if you become tired.
Repeat the breathing cycle for the number of breaths prescribed by your clinician, commonly followed by huffing and a controlled cough.

Many treatment plans use several sets of approximately 8 to 12 Acapella breaths, with relaxed breathing between sets. Session length and frequency should be individualized according to your condition, symptoms, energy level, and amount of sputum. More treatment is not automatically better, particularly if it causes wheezing, exhaustion, pain, or prolonged shortness of breath.

How to Huff After Using the Device

Huffing helps move loosened mucus without the strain of repeated hard coughing. Remove the mouthpiece and take a moderate breath in. Keep your throat open, tighten your abdominal muscles, and breathe out quickly while making a quiet “ha” sound, as though you were fogging a mirror. One or two huffs may be followed by a controlled cough when you feel mucus reaching the larger airways.

A huff should move air effectively without causing a coughing fit. If you become lightheaded, return to normal breathing and rest. Ask your respiratory therapist to watch your technique if mucus continues to feel trapped or every session ends in prolonged coughing.

Common Problems That Reduce Effectiveness

Blowing too hard is one of the most frequent mistakes. A forceful exhalation can cause airway irritation or early airway closure and may prevent the device from producing its most useful oscillations. Puffing the cheeks absorbs some of the vibration, while a loose lip seal allows air to escape.

Other problems include changing the resistance without guidance, rushing through breaths, completely emptying the lungs, and coughing after every exhalation instead of completing a set. Skipping the huff-and-cough phase can also leave loosened mucus in the airways.

If you cannot feel vibration, inspect the assembly and confirm that the dial has not moved. Do not continue using a device that is clogged, cracked, or malfunctioning. A respiratory professional can check whether your breathing flow, resistance setting, and device model are appropriate. For additional background, read about the potential lung-health benefits of the Acapella device.

Medication Timing and Daily Routines

Some people are instructed to use a prescribed bronchodilator before airway clearance so the airways are more open. Certain inhaled medicines may instead be scheduled after mucus has been cleared. The correct order depends on your diagnosis and prescriptions, so do not change medication timing based on general instructions online.

Try to perform treatment when you have enough time to use controlled breaths rather than rushing. Keep tissues or a sputum container nearby and wash your hands afterward. Recording changes in sputum amount, color, thickness, or odor may provide useful information for your healthcare team, especially during a respiratory infection.

Cleaning and Caring for the Device

Because the mouthpiece and internal parts are exposed to saliva and respiratory secretions, regular cleaning is essential. Follow the instructions supplied with your exact model. Many models are taken apart, washed with warm water and mild dish detergent, rinsed thoroughly, and left to air-dry completely on a clean surface. Reassemble the device only after every component is dry.

Disinfection methods differ among models. Boiling, dishwashers, alcohol, peroxide, bleach, and steam may be acceptable for some versions but may damage others. Use only the method stated in the current manufacturer instructions or recommended by your clinician. Never share an Acapella device, and replace it if parts become worn, damaged, discolored, or difficult to clean.

When to Seek Care

Stop using the device and contact your healthcare professional if treatment causes new chest pain, persistent wheezing, unusual or prolonged breathlessness, faintness, or blood in your sputum. Seek emergency care for severe breathing difficulty, blue or gray lips, confusion, fainting, crushing chest pain, or more than a small amount of coughed-up blood.

Ask for medical guidance before using OPEP therapy if you have an untreated collapsed lung, active significant bleeding from the airways, recent facial or sinus surgery, frequent nosebleeds, or a major change in your heart or lung condition. A pulmonologist can determine whether the therapy is appropriate, while a respiratory therapist or pulmonary physical therapist can set the resistance and correct your technique.

Used properly, an Acapella device can be a practical part of a broader airway-clearance plan. A comfortable, steady exhalation, firm cheeks, an effective huff, and careful cleaning are more important than blowing harder or extending sessions without guidance.