Lung Sounds Lungs Diagram of a Smoker after Smoking Cancer Anatomy And Heart Drawing Images AFter Smoking Wee of a Weed Smoker

Lung Sounds Biography

(Source google.com)

Lung sounds can be classified into two categories, either NORMAL or ABNORMAL (adventitious).  Breath sounds originate in the large airways where air velocity and turbulence induce vibrations in the airway walls.  These vibrations are then transmitted through the lung tissue and thoracic wall to the surface where they of pulmonary consolidation in that area. This is because sound travels differently may be heard readily with the aid of a stethescope.  Normal breath sound production is directly related to air flow velocity and airway lumen architecture.  Air flow velocity is primarily determined by pulmonary ventilation (­minute volume velocity) and TOTAL cross sectional airway area  at any given level in the lungs.  It is a common misconception that air moving through terminal bronchioles and alveoli also contribute to breath sounds.  This is incorrect as the air velocity at this level volume   and TOTAL cross sectional airway area at any given level in the lungs.  It is a common misconception that air moving through terminal bronchioles (airways with a diameter <2 mm) and alveoli also contribute to breath sounds.  This is incorrect as the air velocity at this level is too slow (very large total cross sectional area) to produce significant turbulence and sound waves.  However, terminal airway and alveolar disease does modify the breath sounds heard at the surface by either increasing or decreasing the sound transmission through the diseased tissue.  Thus, the sounds that are heard at the periphery of the lung are produced in more central (hilar) regions and are altered in intensity and tonal quality as they pass through pulmonary tissue to the periphery.
Vesicular - heard over most of the lungs. Often described as similar to a soft rustle (of leaves). The inspiratory sounds are faster and louder and longer than expiratory sounds. The expiratory intensity is soft and the pitch is low die away after the first is too slow (very large total cross sectional area) to produce significant turbulence and sound waves.  However, terminal airway and alveolar disease does modify the breath sounds heard at the surface by either increasing or decreasing the sound transmission through the diseased tissue.  Thus, the sounds that are heard at the periphery of the lung are produced in more central (hilar) regions and are altered in intensity and tonal quality as they pass through pulmonary tissue to the periphery. Vesicular - heard over most of the lungs. Often described as similar to a soft rustle (of leaves). The inspiratory sounds are faster and louder and longer than expiratory sounds. The expiratory intensity is soft and the pitch is low die away after the first third of the expiratory phase. Bronchovesicular - heard over the 1st and 2nd intercostal spaces and the interscapular area. The inspiratory and expiratory phases are roughly equal in length. Bronchial - may be normally heard over the manubrium. Expiratory phase is greater than inspiratory. The expiratory pitch is high and intensity is loud. Tracheal - heard directly over the trachea. Inspiratory phase equals the expiratory phase. The sound is very loud and the pitch very high. Pectoriloquy, egophony and bronchophony are a tests of auscultation. For example, in whispered pectoriloquy the patient is asked to whisper - typically a two syllable number as the clinician listens over the lung fields. The whisper is not normally heard over the lungs, but if heard may be indicative of pulmonary consolidation in that area. This is because sound travels differently through denser (fluid or solid) media than the air that should normally be predominant in lung tissue.

Lung Sounds Lungs Diagram of a Smoker after Smoking Cancer Anatomy And Heart Drawing Images AFter Smoking Wee of a Weed Smoker

Lung Sounds Lungs Diagram of a Smoker after Smoking Cancer Anatomy And Heart Drawing Images AFter Smoking Wee of a Weed Smoker

Lung Sounds Lungs Diagram of a Smoker after Smoking Cancer Anatomy And Heart Drawing Images AFter Smoking Wee of a Weed Smoker

Lung Sounds Lungs Diagram of a Smoker after Smoking Cancer Anatomy And Heart Drawing Images AFter Smoking Wee of a Weed Smoker

Lung Sounds Lungs Diagram of a Smoker after Smoking Cancer Anatomy And Heart Drawing Images AFter Smoking Wee of a Weed Smoker

Lung Sounds Lungs Diagram of a Smoker after Smoking Cancer Anatomy And Heart Drawing Images AFter Smoking Wee of a Weed Smoker

Lung Sounds Lungs Diagram of a Smoker after Smoking Cancer Anatomy And Heart Drawing Images AFter Smoking Wee of a Weed Smoker

Lung Sounds Lungs Diagram of a Smoker after Smoking Cancer Anatomy And Heart Drawing Images AFter Smoking Wee of a Weed Smoker

Lung Sounds Lungs Diagram of a Smoker after Smoking Cancer Anatomy And Heart Drawing Images AFter Smoking Wee of a Weed Smoker

Lung Sounds Lungs Diagram of a Smoker after Smoking Cancer Anatomy And Heart Drawing Images AFter Smoking Wee of a Weed Smoker

Lung Sounds Lungs Diagram of a Smoker after Smoking Cancer Anatomy And Heart Drawing Images AFter Smoking Wee of a Weed Smoker

Lung Sounds Lungs Diagram of a Smoker after Smoking Cancer Anatomy And Heart Drawing Images AFter Smoking Wee of a Weed Smoker

Lung Sounds Lungs Diagram of a Smoker after Smoking Cancer Anatomy And Heart Drawing Images AFter Smoking Wee of a Weed Smoker

Lung Sounds Lungs Diagram of a Smoker after Smoking Cancer Anatomy And Heart Drawing Images AFter Smoking Wee of a Weed Smoker

Lung Sounds Lungs Diagram of a Smoker after Smoking Cancer Anatomy And Heart Drawing Images AFter Smoking Wee of a Weed Smoker