ممرض يسمع صوتاً خشناً يشبه احتكاك الجلد عند الشهيق والزفير في جهة الألم، ويختفي عند حبس النفس. ما هذا الصوت؟

A nurse hears a coarse, leathery rubbing sound on inspiration and expiration over the painful area, which disappears when the client holds his breath. What is it?

1. A pericardial friction rub
2. Fine crackles
3. A pleural friction rub
4. Wheeze

Answer: C) A pleural friction rub. A pleural rub comes from inflamed pleural layers, heard with breathing and gone on breath-holding. A pericardial rub persists during breath-holding because it follows the heartbeat.