A nurse detects bilateral crackles when auscultating a client's lungs. Which statement about crackles is true?
a) They're usually heard on expiration and may clear with a cough.
b) They're usually heard on inspiration and sometimes clear with a cough.
c) They're hissing or musical and are usually heard on inspiration and expiration; if severe, they may be heard without a stethoscope.
d) They're creaking and grating and are usually heard over the problem area on both inspiration and expiration.
Answer: b) They're usually heard on inspiration and sometimes clear with a cough.
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