Ch. 27 Flashcards
What are other names of interstitial lung disease?
diffuse interstitial lung disease, fibrotic interstitial lung disease, and pul- monary fibrosis)
More than how many disease entities are characterized by acute, subacute, or chronic inflammatory infiltration of alveo- lar walls by cells, fluid, and connective tissue.
180
If untreated the inflammatory process can progress to what?
Pulmonary fibrosis
What do the anatomic alterations of the lungs involve?
the bronchi, alveolar walls, and adjacent alveolar spaces.
In severe cases what can the extensive inflammation lead too?
pulmonary fibrosis, granulomas, honeycombing, and cavitation.
What are the major pathologic or structural changes associated with chronic ILDs
•Destruction of the alveoli and adjacent pulmonary
capillaries
• Fibrotic thickening of the respiratory bronchioles, alveolar ducts, and alveoli
• Granulomas
• Honeycombing and cavity formation
• Fibrocalcific pleural plaques (particularly in asbestosis)
• Bronchospasm
• Excessive bronchial secretions (caused by inflammation of
airways)
What is asbestos?
Exposure to asbestos may cause asbestosis—a common form of ILD. Asbestos fibers are a mixture of fibrous minerals composed of hydrous silicates of magnesium, sodium, and iron in various proportions.
What are the 2 primary types?
Amphiboles and chrysotile
How long are asbestos fibers?
50 to 100 μm in length and are about 0.5 μm in diameter.
Which lobes are mostly affected?
Lower lobes
T or F; Pleural calcification is common and diagnostic in patients with an asbestos exposure history.
True
What is coal worker pneumonia?
The pulmonary deposition and accumulation of large amounts of coal dust
What is CWP also know as?
coal miner’s lung and black lung
How is CWP characterized?
by the presence of pinpoint nodules called coal macules (black spots)
What is focal emphysema?
The coal macules often develop around the first- and second-generation respiratory bronchioles and cause the adjacent alveoli to retract.
What is Complicated CWP or progressive massive fibrosis (PMF)?
areas of fibrotic nodules greater than 1 cm in diameter.
What are the fibrotic changes in CWP usually caused by?
Silica
What are other names for silicosis?
grinder’s disease or quartz silicosis
What is silicosis caused by?
chronic inhalation of crystalline, free silica, or silicon dioxide particles.
Silica is the main component of more than how many of the rocks on earth?
95%
How is silicosis characterized?
By small rounded modules scattered throughout the lungs.
No single nodule is greater than how many millimeters in diameter?
9 mm
T or F; Patient with a simple silicosis are usually symptom-free?
True
T or F; Complicated silicosis is characterized by nodules that coalesce and form large masses if in tissue usually in the upper lobes and perihilar regions?
True
What is beryllium?
A steel gray lightweight metal found in certain plastics, ceramics, rocket fuel, and x-ray tubes?
When beryllium is inhaled, the fumes or particles may cause what?
A toxic or allergic pneumonitis, sometimes accompanied by rhinitis, pharyngitis and tracheobronchitis
How is the more complex form of berylliosis characterized?
By the development of granulomas, and a diffuse interstitial inflammatory reaction
What is hypersensitivity pneumonitis?
A cell mediated immune response of the lungs caused by the inhalation of a variety of offending agents or antigens
What is another name for hypersensitivity pneumonitis?
Allergic alveolitis or extrinsic allergic alveolitis
What do the antigens contain in hypersensitivity pneumonitis?
Grains, silage, bird, droppings, feathers, wood, dust, cork dust, animal pelts, coffee, beans, fish, meal mushroom, compost, and molds that grow on sugarcane barley and straw
The lung inflammation, or pneumonitis develops, after repeated and prolonged exposure to the allergen. true or false?
True
Hypersensitivity pneumonitis caused by the inhalation of moldy hay is called what?
Farmers lung
What is the major organ affected by the side effects of medications and illicit drugs?
The lungs
What is the largest group of agents associated with interstitial lung disease?
Chemotherapeutics
Drug induced interstitial disease may be seen as early as how long after exposure to these agents?
One month to as late as several years
What is the precise cause of drug induced interstitial lung disease?
It is not known
What are the two phases of radiation therapy?
Acute pneumatic phase and late fibrotic phase
Acute pneumonitis is rarely seen in patients who receive a total radiation dose of less than how many rad?
3500
What is the amount of drug exposure that will cause ILD near and in the radiated areas?
6000 rad over 6 weeks