Usual Duration 250 , A Tonality (= A

Usual duration 250 , a tonality (= a timbre) About 400 Hz. Damp rattles - frequency of a sound usually less than 200 The Hz also depends on diameter of bronchial tubes At auscultation of damp rattles It is necessary to define their localisation loudness, calibre, height of a sound, Duration, etc. properties. It is important to note a breath phase when arise Also rattles, changes after cough disappear and at position and pose change The patient. When rattles are revealed, it is necessary to pay attention On a timbre, borders of a zone of their revealing and the period of the certificate of breath, when the such Rattles appear. It is necessary to note changes of their force and a timbre during the periods Breath and exhalation. It is important to estimate changes of rattles in the vertical thus Position of the patient and as lying on a back and kolenno - elbow (decubitus) positions. Allocate rattles small bubbly and it is large Bubbly (and, sometimes, and bubbly). More often it is supposed that extended High-pitch tone rattles are present at sick of a bronchial asthma or COPD.