Heard most often on inspiration, result of air moving through fluid, commonly heard with CHF, sounds like rolling several strands of hair next to your ear.
Rales or Crackles
Heard more on expiration but can on inspiration, result of thick secretions partially obstructing larger airways, may clear with coughing, commonly heard with emphysema & acute bronchitis.
Rhonchi or Gurgles
Heard most commonly during expiration but can on inspiration, result of air being forced through narrowed airways, common causes of narrowed airways include asthma, allergic reaction & partial airway obstruction, continuous high-pitched musical squeak
Wheezes
Caused by laryngeal or tracheal obstruction, obstruction can be caused by foreign body airway obstruction, croup & tumors constricting the larynx, loud musical sound differentiating from wheezes because of intensity.
Stridor
Harsh, inspiratory sound caused by a partially blocked airway, heard with sleeping, head trauma or brain injuries.
BIOL3326 Forms
