Pursed-Lip Breathing for Emphysema: Technique, Mechanisms, and Benefits

Pursed-lip breathing (PLB) is a simple, evidence-based technique to reduce dyspnea in emphysema and COPD.

How to Perform PLB

1. Relax neck/shoulders.
2. Inhale slowly through nose for 2 counts.
3. Purse lips as if whistling.
4. Exhale gently through pursed lips for 4–6 counts (2:1 or 3:1 ratio).
5. Repeat 4–5 times, several times daily and during dyspnea episodes.

Physiological Mechanisms

• Positive expiratory pressure: Splints open collapsing airways during exhalation.
• Reduced respiratory rate: Prolonged expiration → ↓ dynamic hyperinflation.
• Improved diaphragmatic efficiency: Less air trapping → diaphragm operates on favorable length-tension curve.
• Enhanced gas exchange: Better V/Q matching from slower, deeper breaths.

Benefits

• Decreased dyspnea and work of breathing.
• Improved exercise tolerance and oxygen saturation.
• Reduced anxiety/panic during breathlessness.
• No equipment needed; usable anywhere.

PLB is a cornerstone of pulmonary rehabilitation. Patients should practice until automatic during exertion.