رجل عمره ٦٨ سنة عنده انسداد رئوي مزمن، يضيق نفسه عند صعود الدرج وفي الأعمال البسيطة. تشبعه ٩٢٪ في الراحة، والتنفس ٢٢ مع زفير طويل. علّمته الممرضة طريقة التنفس بالشفاه المزمومة. أي عبارة من المريض تدل أنه فهم؟

A 68-year-old man with COPD becomes breathless climbing stairs and with simple tasks. SpO2 92% at rest, RR 22 with prolonged expiration. The nurse teaches pursed-lip breathing. Which statement shows he understood?

1. “I breathe in through pursed lips and then breathe out quickly through my nose.”
2. “I breathe in through my nose and out slowly through pursed lips for twice as long.”
3. “I hold my breath for ten seconds after each breath in, then let it all out.”
4. “I blow the air out hard and fast so that my lungs empty completely.”

Answer: B) “I breathe in through my nose and out slowly through pursed lips for twice as long.”. Slow exhalation through pursed lips creates back-pressure that keeps small airways open and clears CO2, with exhalation about twice as long as inhalation. Forceful, fast exhalation collapses the airways and traps air.