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IP6 S.Path Respir L3

Lung section of respiratoy system

Describe a normal lung? Pink, spongy, collapse when open the thorax
What could cause a failure of the lungs to collapse? (5) airway obstruction, fibrosis, edema, mineralization, pneumonia, neoplasia, pleuritis, emphysema
If the lung is red it would suggest? (3) congestion, hyperemia, hemorrhage
If the lung is dark red to blue? (1) collapsed lobules=atelectasis
lung is pale pink to white? (3) anemia, fibrosis, emphysema
patchy or diffuse yellow brown lungs? chronic passive congestion
what is the gray-yellow material that can sometimes be found on pleural surface? fibrin
Texture changes: firm (2)? rubbery? gritty? firm=pneumonia, neoplasia; rubbery=edema; gritty=mineralization
_______ _______ traps air in the lung b/c of the fibrous CT in the lumen of the bronciole Bronchiolitis obliterans
bronchiolitis is often assd with what dz? COPD chronic obstructive pulmonary dz
For efficient gas exchange you need what 2things? 1.correct air:capillary blood ratio (ventilation/perfusion ratio) 2. blood must be close to air
If pulmonary tissue is not inflated ? Atelectasis
If pulmonary tissue is over inflated? Emphysema
condition where lungs fail to expand with air at time of birth. Results from 1. obstruction of airway or 2. quantity of surfactant congenital atelectasis
which cells produce surfactant? type 2 pneumocytes and clara cells
condition in which lungs collapse after inflation (due to obstruction or compressive force) acquired atelectasis
What could cause compressive acquired atelectasis? (4) abscess or neoplasm in pleural cavity, pressure from bloat, fluid in thorax, loss of negative pressure (pneumothroax)
reduction in diameter of aiways caused by edema, inflamm, or blockage of airway by mucus, exudate or foreign material Obstructive (absorption) acquired atelectasis
When obstruction of is complete air is trapped and becomes _______. often has a ___ pattern due to blockage of aiway supplying lobule reabsorbed, lobular pattern
Atelectic lungs are often depressed below surface of normally inflated lung and dark color. Distibution is _______(congenital) & ________(obstructive), diffuse if severe and compressive congenital atelectasis=multifocal; obstructive atelectasis=lobular
Created by: rccola19



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