A creaking or grating sound that increases in intensity with deep breathing and is similar to coarse crackles, but is not affected by coughing, best describes which of the following?
a. Rhonchi
b. Friction rub
c. Rales
d. Wheezing
ANS: B
A pleural friction rub is a creaking or grating sound that occurs when the pleural surfaces become inflamed and the roughened edges rub together during breathing, as in pleurisy. It may be heard only during inhalation but often is identified during both phases of breathing.
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