COPD and Restrictive lung disease Flashcards
What are sections and sub sections of the respiratory system?
Trachea, Carina, R & L main stem, lobar bronchi, segmental bronchi, subsegmental bronchi, terminal bronchioles, respiratory bronchioles, alveolar ducts, alveolar sacs
What are the normal lung units?
Alveoli sacs for gas exchange: elastic in nature, exchange CO2 and O2 for ATP production, 300 million clusters in adult lung
What is COPD?
Disease that affects both mechanical function and gas exchange of respiratory system.
Trouble getting air out: long expiratory time (1:4+)
What is epidemiology-COPD risk factors and physical symptoms?
Smoking (>85%), air pollution, family history, occupational dusts
Dyspnea on exertion, fatigue, chronic cough, wheezing &/or rhonchi, expectoration of mucus
What is COPD pathophysiology?
Loss of normal elastic recoil and bronchial tubes collapse (air trapping promotes hyperinflation)
Changes in PFT: decreased ERV, increased RV
Decreased bronchial lumen
Respiratory muscles must work harder
Changes in CXR and PFTs
What happens when there is decreased bronchial lumen and respiratory muscles must work harder?
Lumen: increased mucus production, inflammation of mucosal lining (thickening), spasm (constriction) of bronchial smooth muscle
Muscles: enlarged thorax is already inflated, must overcome resistance to airflow obstruction, alveolar ventilation is decreased
What are COPD signs and symptoms?
Hypoxemia: pulmonary artery hypertension
Polycythemia: increased RBC count, viscosity (increases resistance)
Cor pulmonale
Cor pulmonale AND respiratory failure
What is COPD treatment?
Remove the irritant
Inhaled medications: B agonists, anticholinergics, corticosteroids, antibiotics
Exercise training
What is pathophysiology of emphysema?
Alveolar/parenchymal disease: enlargement of air spaces distal to terminal bronchioles, loss of elastic fibers, and destruction of alveolar septal walls
Lung function altered: elastic recoil, collapse of airways with exhalation and chronic air flow obstruction
Abnormal PFTs and CXR: hyperinflation with flattened diaphragm on x ray
What are the 2 types of emphysema?
Centriacinar (centrilobular): affects respiratory bronchioles, worse in upper lobes
Panacinar (panlobular): lower lobes more affected, observed in people with alpha-1-antitrypsin deficiency (protein deficiency)
What parts of the respiratory system are affected in emphysema?
Respiratory bronchioles
Alveolar ducts
Alveolar sacs
What are the clinical features of empysema?
Severe dyspnea Dry nonproductive cough "skin and bones" All energy is used to breath Absent (very decreased) breath sounds heard during auscultation of chest Expiratory phase increased
What is pathophysiology of chronic bronchitis?
Chronic productive cough for 3 months or year for >2 consecutive years
Proliferation of submucosal glands and goblet cells
Insidious: smokers cough, morning cough, continual cough (recurrent “pneumonia”)
What do the lungs do in response to irritants?
Contraction of bronchial smooth muscle
Denuded cilia
Increased secretions
Swelling of mucosa
What are clinical features of CB?
Chronic, productive cough: generally clear mucous unless infection
Overweight
Blue-ish color to lips and nails: peripheral edema in LE’s d/t right side heart failure)
Rhonchi and wheezes heard during auscultation
Expiratory phase increased
Abnormal PFT and CXR
What parts of the respiratory system is involved with CB?
Lobar bronchi, segmental bronchi, subsegmental bronchi
What is asthma?
Inflammatory disease causing SOA and DOE, wheezing, coughing
Bronchospasm and inflammation caused by hypersensitivity to extrinsic and intrinsic stimuli (pollen, grass, cold air, exercise, stress, etc)
Structural changes of airway with vast amount of thickening of airways
What happens to lung function with asthma and how do you treat it?
Results in air trapping increasing RV, increasing CO2, and decreasing O2.
Reduction of FEV1 and peak flow
Treatment: trigger awareness, inhaled agents (bronchodilators, anti-inflammatories, prophylactic agents)
What is EIB?
Caused by increased air flow and drying of airways.
Can experience without history of diagnosed asthma
Up to 30% of Olympic athletes have it.
Prevent with proper warm up and pharmacological therapy
What is cor pulmonale?
Right ventricular hypertrophy secondary to abnormalities of lung structure and function-
Developing pulmonary disease results in increasing hypoxemia.
Vasoconstriction causes pulmonary hypertension (makes right heart work harder which leads to peripheral edema)
What is CF?
Inherited chronic disease that affects lungs and digestive system.
Defective gene and its protein product cause body to produce unusually thick, sticky mucus that: clogs lungs and leads to infections, obstructs pancreas and stops natural enzymes from helping body break down and absorb food