Lung Examination: Abnormal презентация

Lung Examination: Abnormal Arcot J. Chandrasekhar, M.D.

Illustrative Pathological problems Consolidation Atelectasis Pleural effusion Pneumothorax Mass Diffuse lung disease

Steps General Examination Mediastinal position Chest expansion Lung resonance Breath sounds Adventitious sounds Voice transmission

General Examination Respiratory rate Pattern of breathing Cyanosis Clubbing Weight Cough Hospital setting Effort of ventilation Shape of thorax

Respiratory Rate Bradypnea: rate less than 8 per minute Tachypnea: rate greater than 25 per minute

Pattern of Breathing Kussmals Sleep apnea Cheyne strokes Pursed lip breathing Orthopnoea: Short of breath in supine position, gets some relief by sitting or standing up.

Central Cyanosis Results from pulmonary dysfunction, the mucous membrane of conjunctiva and tongue are bluish. If there was chronic hypoxemia and secondary erythrocytosis, you can detect the conjunctival and scleral vessels to be full, tortuous and bluish.

Clubbing In clubbing, there is widening of the AP and lateral diameter of terminal portion of fingers and toes giving the appearance of clubbing. The angle between the nail and skin is greater than 180. The periungual skin is stretched and shiny. There is fluctuation of the nail bed. One can feel the posterior edge of the nail.

Significance: Clubbing Observed In: Intrathoracic malignancy: Primary or secondary (lung, pleural, mediastinal) Suppurative lung disease: (lung abscess, bronchiectasis, empyema) Diffuse interstitial fibrosis: Alveolar capillary block syndrome In association with other systemic disorders

Weight Emaciation cachectic Malignancy Tuberculosis

Weight Obese: Sleep apnea syndrome

Cough Productive Dry Whooping Bovine

Hospital Setting Isolation room Oxygen set up

Effort of Ventilation Person appears uncomfortable. Breathing seems voluntary. Accessory muscles are in use, expiratory muscles are active and expiration is not passive any more. The degree of negative pleural pressure is high. The respiratory rate is increased.

Resting Size and Shape of Thorax Barrel chest Kyphosis Scoliosis Pectus excavatum Gibbus

Barrel Chest

Tracheal Position: Mediastinum Any deviation of the mediastinum is abnormal Lateral shift: The mediastinum can be either pulled or pushed away from the lesion Pull: Loss of lung volume (Atelectasis, fibrosis, agenesis, surgical resection, pleural fibrosis) Push: Space occupying lesions (pleural effusion, pneumothorax, large mass lesions) Mediastinal masses and thyroid tumors

Chest Expansion Asymmetrical chest expansion is abnormal The abnormal side expands less and lags behind the normal side Any form of unilateral lung or pleural disease can cause asymmetry of chest expansion Global expansion decrease

Percussion: Decreased or Increased Resonance is Abnormal Dullness Decreased resonance is noted with pleural effusion and all other lung diseases The dullness is flat and the finger is painful to percussion with pleural effusion Hyper resonance: Increased resonance can be noted either due to lung distention as seen in asthma, emphysema, bullous disease or due to Pneumothorax Traube's space

Breath Sounds: Diminished or Absent Intensity of breath sounds, in general, is a good index of ventilation of the underlying lung. Breath sounds are markedly decreased in emphysema. Symmetry: If there is asymmetry in intensity, the side where there is decreased intensity is abnormal. Any form of pleural or pulmonary disease can give rise to decreased intensity. Harsh or increased: If the intensity increases there is more ventilation and vice versa.

Bronchial Bronchial breathing anywhere other than over the trachea, right clavicle or right inter-scapular space is abnormal. In consolidation, the bronchial breathing is low pitched and sticky and is termed tubular type of bronchial breathing. In cavitary disease, it is high pitched and hollow and is called cavernous breathing. You can simulate this sound by blowing over an empty coke bottle.

Bronchial breathing

Rhonchi Rhonchi are long continuous adventitious sounds, generated by obstruction to airways. When detected, note whether it is generalized or localized, during inspiration or expiration, and the pitch. Diffused rhonchi would suggest a disease with generalized airway obstruction like asthma or COPD.

Rhonchi

Rhonchi Localized rhonchi suggests obstruction of any etiology e.g., tumor, foreign body or mucous. Mucous secretions will disappear with coughing, so would the rhonchus. Expiratory rhonchi implies obstruction to intrathoracic airways. Asthmatics can also have inspiratory rhonchi while it is uncommon in COPD.

Pleural Rub Normal parietal and visceral pleura glide smoothly during respiration. If the pleura is roughened due to any reason, a scratching, grating sound, related to respiration is heard. You can hear the sound by compressing harder with the stethoscope and making the patient take deep breaths. It is localized and can be palpable.

Pleural rub

Stridor Loud audible inspiratory rhonchi is called a stridor. Inspiratory rhonchi in general, implies large airway obstruction.

Crackles Interrupted adventitious sounds are called crackles. Make a notation about timing, intensity, effect with respiration, position, coughing and character. Timing and Intensity Crackles heard only at the end of inspiration are called fine crackles. When the surfactant is depleted, the alveoli collapse. Air enters the alveoli at the end of inspiration. This sound is generated as the alveoli pop open from it's collapsed state.

Crackles When the crackles are heard at the end of inspiration and the beginning of expiration the fluid or secretions are probably in respiratory bronchioles: medium crackles. If the crackles are heard throughout it implies the secretions are in bronchi: coarse crackles.

Voice Transmission (tactile fremitus, vocal resonance) Asymmetrical voice transmission points to disease on one side. Increased: Any situation where bronchial breathing is heard the sounds become loud, sharp and distinct: Bronchophony. In extreme situations, the whispered words come clearly and distinctly: Whispering pectoriloquy.

Voice Transmission (tactile fremitus, vocal resonance) Decreased: A quantitative decrease in voice transmission could be due to any other form of lung or pleural disease. Qualitative alteration: A qualitative alteration of voice transmission is noted over consolidation and along the upper margin of pleural effusion: Egophony The sound is like a nasal twang or goat bleating.