Name
Breath Sounds
|Name |Sounds like |Why named |Mechanism |Volume |Freq |I:E duration|I:E pause |Location |
|Wheeze |always in expiration, |a musical quality; flow of air thorugh narrowed |high |use as a marker of asthma is plagued by problems: | | |may clear or | |
| |during inspiration and|tube causes narrowing of the walls (Bernoulli |(>400Hz) |silent asthmatics are actually worse, and conversely, | | |change with | |
| |expiration if severe, |principle) and the fluttering of walls produces | |normal subjects may generate enough expiratory flow to| | |deep breath or | |
| |and never only in |the sound (therefore severe asthmatics may not | |produce a wheeze, therby misdiagnosing asthma in | | |coughing | |
| |inspiration |wheeze because they can’t generate enough | |normal subjects; finallly, not all the wheezes is | | | | |
| | |flow!); model is not organ pipes, where pitch | |asthma – sounds from the larynx may masquerade as | | | | |
| | |could be used to asses size of airway, but | |wheezing (stridor – exclusively inspiratory, while | | | | |
| | |rather the reeds of a harmonica; only way to | |wheezes are either inspiratory and expiratory, or | | | | |
| | |assess severity of asthma is by the length of | |expiratory alone; vocal cord dysfunction listen if | | | | |
| | |the wheeze, not presence or absence -- if only | |louder over the neck than chest) and cardiac asthma | | | | |
| | |on exhalation then milder than if both I and E | |(RAD triggered by LV failure), as well as many other | | | | |
| | | | |causes of wheezing | | | | |
|Squeak (aka squawk) |end of inspiration |“the chirp of a little bird”RTHL |usually occur with late inspiratory crackles, and are | |
| | | |thought to share their mechanism: the reopening of a | |
| | | |partially collapsed bronchiolar lumen | |
|Egophony |ego(G) = goat; RTHL said “it is|normal voice sounds are generated by the vocal cords, and |see E to A changes below. . . the test for egophony is |ALL TESTS OF TRANSMITTED VOICE |
| |quavering and jerky like the |then transmitted upwards to the mouth and downwards to the |the test for E to A changes nobody listens to just hear|SOUNDS CHECKS FOR THE SAME |
| |bleating of a goat” |chest, air in the alveoli muffle the high pitch components, |the bleating of a goat anymore |UNDERLYING PROCESS: |
| | |eliminating vowel sounds and leaving a soft and | | |
| | |unintelligible mumble; solids and fluids, however, transmit | |1) Is there blood/ pus/ water / |
| | |sounds better than air (ear on the train track) and make | |alveolar collapse replacing the |
| | |voice sounds louder, clearer, and often intelligible | |normal air-filled alveoli? |
| | | | |2) Are the bronchi open enough to |
| | | | |allow me to hear the voice sounds |
| | | | |transmitted to the chest? |
| | | | | |
| | | | |(egophony is probablly the most |
| | | | |useful test, followed by whispered|
| | | | |pectoriloquy) |
|E to A changes |British missionary named |the unique character of the “E” sound is made up of sounds |1. Instruct the pt to say “bee” or “eee” as you | |
| |Shibley was working as a |both in the 2000-3,500 Hz range, and the 100-400 Hz range; |auscultate | |
| |physician in China in the |the unique character of the “A” sound is made up of sounds in|2. If you find an area that sounds like “A”, remove | |
| |1920’s, and asked his patients |the 300-600 range; consolidated lung amplifies the 300-600 Hz|your earpieces to be sure that the patient is saying | |
| |to say 1,2,3 (“i,er,san”); he |“A” sound, making the sounds characteristically “A” (in fact,|“eee” | |
| |noticed that the “i” sound |all vowels sound like “A” through consolidated lung |(think of a trumpet played with a wah-wah mute) | |
| |changed consistently to “A” in | | | |
| |cases of consolidation of | | | |
| |pleural effusion | | | |
|Pectoriloquy |“voice of the chest” in Latin, |whispered sounds consist almost entirely of high-frequency |1. Have the patient say “Sixty-six whiskeys, please” | |
| |and indicative of intelligible |components, therefore they are not transmitted by the aerated|2. Listen over the trachea | |
| |words heard over the chest when|lung, they become audible only when the consolidation allows |3. Now listen in the periphery to see if you can hear | |
| |a patient is whispering |their transmission |anything that sounds like what you heard in the trachea| |
| |(whispered pectoriloquy) or | |4. Test your conclusion by asking the pt to whisper or | |
| |speaking (spoken pectoriloquy) | |say his/her SSN and see if you can identify it | |
|Bronchophony |“sound of the bonchi” in Greek;|same as tubular breath sounds |While examining a normal lung, listen over the larynx | |
| |indicates voice sounds are as | |as the patient speaks., and then listen over the | |
| |loud and clear as heard over | |periphery of the lungs: the voice sounds in the | |
| |the larynx, but elsewhere in | |periphery are muffled; then try it in a patient where | |
| |the chest; the words still | |consolidation is suspected; if you hear loud and clear | |
| |remain unintelligible, but the | |sounds (not intelliglibe speech. . .that would be | |
| |sound is loud and clear | |spoken pectoriloquy) you have bronchophony | |
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