crackles may be heard when atelectatic alveoli pop open after a few deep breaths.The pulmonary exam includes multiple components, including inspection, palpation, percussion, and auscultation.secretions from bronchitis may cause wheezes, (or rhonchi), that clear with coughing.whether or not the sounds clear after a cough or a few deep breaths.persistence of the pattern from breath to breath, and.If adventitious sounds are heard, it is important to assess: Stridor is caused by obstruction of the upper airway, is a sign of respiratory distress and thus requires immediate attention. Stridor refers to a high-pitched harsh sound heard during inspiration. Visit EMTprep LungSoundSeries Pleural Rub Sounds If the rubbing sound continues, its a pericardial friction rub because the inflamed pericardial layers continue rubbing together with each heart beat - a pleural rub stops when breathing stops. To determine whether the sound is a pleural friction rub or a pericardial friction rub, ask the patient to hold his breath briefly. More often heard on inspiration than expiration, the pleural friction rub is easy to confuse with a pericardial friction rub. Pleural friction rubs are low-pitched, grating, or creaking sounds that occur when inflamed pleural surfaces rub together during respiration.
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