Pulmonary System Pathology Flashcards
What happens in an obstructive lugng disorder? What are the major examples of obstructive diseases?
expiratory airflow limitation:
asthma COPD chronic bronchitis bronchiectasis bronchiolitis
What happens in a restrictive lung disorder? What are the major examples of restrictive diseases
reduced total lung capcity/reduced ventilatory elasticity
diffuse parenchymal or interstitial lung disease like idiopathic pulmonary fibrosis and occupational lung diseases
chest wall/pleural diseases, massive obesity, neuromuscular diseases
What volumes/capacities will be low in obstructive and what will be low in restrictive?
obstructive = forced expiratory volume low
restrictive - total lung capacity low
What should you think of with sudden respiratory distress and unlateral leg swelling?
DVT/PE
What is a normal pulse ox?
equal or over 95%
WHen you do chest imaging, what can CXR tell you?
Use to look for pulmonary or pleural disease, cardiac enlargement and mediastinal pathology
note - larger airway disease and pulmonary vascular disease are usually NORMAL on CSR
When you do chest imaging, what can CT scan do for you?
It gives much better detail for chest contents like mass lesions, larger airways, lymph nodes, aorta pathology, esophagus issues and mediastinal masses/cysts
What is atelectasis?
collapse or loss of lung volume
What are the general classifications of secondary atelectasis?
- obstructive - resorption of alveolar gas distal to bronchial obstruction by mucus
- resorptive - alveolar collapse due to pneumonia or poor lung ventilation and POST GENERAL ANESTHESIA!
- Compression - pulmonary collapse due to mass effect
- conntraction - pulmonary shrinkage due to pleural fibrosis
What are the symptoms of asthma?
episodic wheezing, dyspnea, cough with or without tenadious mucus/sputum
kids may have cough-predominant symptoms
What does a diagnosis of pneumonia require?
pulmonary infiltrate on CXR or CT - lobar or whole lung ingiltrates or cavitation with or without effusion
What’s the basis for pulmonary edema?
In general, what’s the most common cause?
it’s movement of fluid into the alveolar spaces due to hemodynamically increased alveolar capillary pressure (cardiogenic) or alveolar microvascular injury (non-cardiogenic)
CHF is the most common cause
What’s the most common cause of cardiogenic pulmonary edema
left ventricular failure due to coronary disease (MI)
but also chronic HTN, cardiomyuopathy, aortic valve disease, new-onset arrhythmias and mitral stenosis
What lab findings will tell you if a pulmonary edema is from heart failure?
serum-B-natriuretic peptide
What imaging is best for assessing LV systolic/diastolic function, cardiac pressures, valvular disease or pericardial effusion/tamponade?
echocardiography
What is the major non-cardiogenic cause of acute pulmonary edema/
acute respiratory distress syndrome
or acute lung injury
slide 248 - How do the hypersensitivity pneumonidites present clinically?
acute attacks 4-6 hours post exposure to the inhaled antigen with fever, dyspnea, cough and leukocytosis
chronically with signs of restrictive lung disease
slide 275 - WHat are three highly important causes of acquired hypercoaculability resulting in predisposition to PE?
immobilization
post-surgery
cancer
