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Flashcards in M1 Review Deck (13):

Contrast the localization of wheezing or rhonchi vs. crackles.

wheezing or rhonchi are in the airway (non-alveoli)
crackles are in the lung parenchyma (alveoli)


What are wheezes and how are they created?

a polyphonic whistling sound made by the high-velocity flow of air through a narrowed bronchial tube


What are rhonchi and how are they created?

a coarse rattling sound somewhat like snoring, usually caused by secretions in the bronchial tube


What are rales and how are they created?

rales are also called crackles, a small clicking, bubbling or rattling sound in the lung believed to occur when air opens closed air spaces (can be further described as moist, dry, fine and coarse)


What are adventious breath sounds?

arising form an external source or occurring in an unusual place or manner


LIst the different parts of the cartilaginous, non cartilaginous and gas exchange portions of the lower airway.

cartilaginous airways: trachea, main, lobar, segmental bronchi
noncartilagenious airways: bronchioles and terminal bronchioles
gas exchange: respiratory bronchioles, alveolar ducts, alveolar sacs


What differential diagnosis would you consider for wheezing?

uncontrolled asthma
cystic fibrosis
(acute pulmonary edema)


What is hypersensitivity pneumonitis?

inflammation of the alveoli due to hypersensitivity to inhaled organic dust

tx. with supplemental oxygen and prednisone for (3) months with taper


At what point is there no more cartilage in the airways?

at the level of the bronchiole


What can be included in the differential diagnosis for crackles?

interstitial lung disorders: pneumonitis, sarcodosis, hypersensitivity pneumonitis, asbestosis

also with pneumonia or pulmonary edema


Which type of pneumocyte is involved in gas exchange?

type I, type II produces surfactant and is proliferative


What are factors that shift the oxygen saturation curve to the right?

acidosis, increased temperature, increased 2,3 DPG (think of an exercising muscle)


Name 3 conditions that result in decreased breath sounds (focal).

Mucous plug with atelectasis
pleural effusion