Abnormal respiratory sounds mechanism

Question 1

Crackles (fine)
*Crackles may also be called rales.

Answer 1

Deflated airways and alveoli pop open. Small amt. fluid

Question 2

Crackles (coarse)

Answer 2

Small air bubbles flow through secretions or narrow airways

Question 3

Wheeze

Answer 3

Air passing through narrow airways (insp. & exp)

Question 4

Rhonchi
*May also be called low pitch wheeze, snore)

Answer 4

Air passes around or through secretions

Question 5

Pleural friction rub

Answer 5

Inflamed pleural surfaces lose their normal lubrication and rub together during breathing

Question 6

Stridor

Answer 6

Laryngeal or tracheal inflammation, spasm, obstruction