physical exam of the chest: auscultation steve s. kraman, m.d. professor of pulmonary, critical care...
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Physical Exam of the Chest:Auscultation
Physical Exam of the Chest:Auscultation
Steve S. Kraman, M.D.
Professor of Pulmonary,Critical Care & Sleep Medicine,
University of Kentucky
Figure 16-10. p. 454.
Mechanics of Respiration
Figure 16-6. p. 451.
Anterior Location of Lungs
Figure 16-7. p. 451.
Posterior Location of Lungs
Figure 16-8. p. 452.
Right Lateral Location of Lung
Figure 16-9. p. 452.
Left Lateral Location of Lung
Brief Survey of Chest and Respiration
• Is the patient in distress?
• Observe the rate, rhythm,and depth of respiration.
• Audible sounds?• Respirations should
be easy, quiet, and regular.
Figure 16-13. p. 461.
Symmetric Chest Expansion
Tactile Examination of the ChestTactile fremitus
• Palpable vibration of the chest wall from sounds transmitted from the phonating larynx.
• “Ninety-nine.”• Compare symmetry.• Abnormality MAY be
‘ed or ‘ed.
Figure 16-14. p. 462.
Tactile Fremitus
Figure 16-22. p. 472.
Assess Tactile Fremitus
Percussion
• Systematic• Progress from apices
to base• Side to side• Intensity, duration,
and pitch• Normal = resonance• Note location of
abnormalities
PERCUSSION
• RESONANCE - NL• HYPERRESONANCE - too much air such
as emphysema or pneumothorax • DULLNESS - abnormal density due to
possible pneumonia, pleural effusion, atelectasis or tumor
• These are subtle and often equivocal findings
Figure 16-15. p. 463.
Sequence for Percussion
Figure 16-23. p. 473.
Sequence for Percussion
Figure 16-16. p. 463.
Expected Percussion Notes – Posterior Chest
Figure 16-24. p. 473.
Expected Percussion Notes
Figure 16-17. p. 464.
Diaphragmatic Excursion
Bronchophony:
• Voice sounds are increased and clearer, even though one can not understand words.
• Heard under similar circumstances as bronchial breath sounds, such as when there is consolidation of the lung but the airways leading into the consolidation are open.
Whispered pectoriloquy
• Pectoriloquy means “chest speaking.” • When a person with normal lungs whispers it is
poorly heard with a stethoscope. • With whispered pectoriloquy one can hear words
that are whispered with the stethoscope. This is usually heard under the same circumstances as bronchial breath sounds and broncophony has similar significance.
Egophony
• The word egophony means "goat sound" from the Greek root "ego" (goat).
• This term describes a high-pitched bleating sound heard through an area of parenchymal consolidation
Egophony: • When a normal (healthy) individual says "E" it
is heard under normal circumstances as an "E" with a stethoscope.
• With egophony this "E" becomes "A" when listening through a stethoscope.
• Usually heard under the same conditions as bronchial breath sounds and bronchophony and has similar meanings.
What you hear
• When listening to lung sounds, you hear:– Lung sounds– Heart sounds– Muscle sounds (respiratory muscles)– Breath sounds transmitted through the air
from the mouth
General Principals and Practice
• A word about stethoscopes– Acoustic– Electronic
• Integrity
• Practice
Generally Accepted Nomenclature
Observer Variability
• Sensitivity of the human ear
A Way to Think About Lung Sounds
• The acoustic repertoire of the respiratory system.– The thorax as a damped drum– The airways and parenchyma as
noise makers• continuous noises• impulse noises
A Way to Think About Lung Sounds
• Sounds created within the chest, or introduced from outside (e.g., percussion), are colored by the damped resonant behavior of the thorax.
• E.g., normal voice transmission.
Anatomy of the Thorax
“1-2-3”
ChestMouth
Normal Lung Sounds
• Vesicular sounds – what do they mean? – Where do they come from?– How far do they travel?
• Bronchial sounds
• Tracheal sounds
• Normal crackles?
Origin of Normal Lung Sounds
Vesicular sounds: Not from Alveoli
|--1mm-- |
SEM of Metallic Injection of Alveoli
Normal Variation
Dosani and Kraman. Chest 1983;83:628-631
Normal Lung Sounds• Normal Crackles
Abnormal Lung Sounds
• Too-faint vesicular sounds (more later)• Bronchial sounds (where abnormal)• Wheezes• Rhonchi• Crackles• Pleural sounds• Stridor• Squawks
Abnormal Lung Sounds
• Wheeze
InspirExpir
Multiple
Single
Trachea
Mouth
Wheeze v. Obstruction
Abnormal Lung Sounds
• RhonchusInspiration Expiration
Abnormal Lung Sounds
• Crackles
Murphy, RLH. Sem. Respir. Med. 1985:6:210-219
Fine
Course
Abnormal Lung Sounds• Fine Crackles; how
are they made?
Fine Crackles
• Why not always?
Ideopathic Pul. Fibrosis Sarcoidosis
(Baughman, et al, Chest 1991;100:96-101)
Crackles in Asbestosis
• Prevalence of Crackles Related to Age
0
10
20
30
40
50
60
~19 20~29 30~39 40~49 50~59
Workers
Controls
Crackles (%)
Age (Years) From Shirai et al, Br J Dis Chest1981;75:386-96
Coarse Crackles
Abnormal Lung Sounds• Pleural Rubs
Inspiration Expiration
Abnormal Lung Sounds
• Stridor and “VC Dysfunction Syndrome”
Tracheal tumor
Baby with croup
Death Rattle
The rattle, or death rattle, is a sound heard near the mouth of a patient who is too debilitated to be able to clear his own secretions. For this reason it is often associated with dying patients. When listened to with a stethoscope over the neck or chest, the rattle sounds like rhonchi or coarse crackles.
Coarse crackles heard at the mouth (death rattle)
Squawks (Squeaks)
Squawks are short, inspiratory wheezes that appear to occur principally in allergic alveolitis and interstitial fibrosis but are also heard in pneumonia. Squawks are often heard in association with fine crackles and the squawk itself may be noticed to be initiated with a crackle. It is believed that this sound is caused by the explosive opening and fluttering of the unstable airway which causes the short wheeze.
Squawk in allergic alveolitisInspiratory and expiratory crackles are also audible
http://www.mc.uky.edu/pulmonary/lungsound.pps
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