Final Exam: Week 4 Pulmonary Flashcards
Pulmonary disease prevalence
- Third highest cause of mortality in the U.S
- 15% of U.S adults have chronic lung disease such as asthma or COPD
- 10% report mild symptoms
- > 33% report persistent moderate to severe symptoms that impact quality of life
Bronchitis and emphysema
- Chronic airflow limitation
- Most commonly associated with a history of smoking
How is asthma characterized?
Hyper-excitability of bronchial smooth muscle
- May occur on its own or as a component of chronic airflow limitation
Restrictive lung disease
Common in older age groups as a result of prolonged exposure to pulmonary irritants over the life span
Factors that affect pulmonary health in elders
Impaired oxygen transport (physical inactivity, sarcopenia, cardiovascular abnormalities) and lifestyle factors
COPD lung diseases
Emphysema and chronic bronchitis
Is COPD preventable?
Yes, but it is also progressive
Risk factors for COPD
- Smoking
- Environmental pollutants
- History of asthma
Characterization of COPD
-Airflow obstruction impacting gas exchange causing dyspnea - Limited reserve lung capacity with greater risk of hypoxemia
CO2 retention
Patients struggle to exhale enough CO2 when they breathe out, excess carbon dioxide builds up in patient’s blood which can cause serious symptoms making it difficult to breathe
- Trapped CO2 takes up space that is needed to hold oxygen rich air when breathing in
Alveoli damage with COPD
Damage to alveoli and lung tissue prevents patients from pushing all of the CO2 out of their lungs → airway narrowing, blockage, and other changes in the lungs
CO2 build up in the blood
- Fewer healthy alveoli making it difficult to get enough oxygen into the blood
- Imbalance between blood oxygen and carbon dioxide levels, leads to oxygen deprivation
- CO2 gets reabsorbed back into the blood, leaving fewer healthy red blood cells to pick up oxygen
Ventilation-perfusion mismatch
When the body gets confused about which parts of the lungs to prioritize, reducing the efficiency of gas exchange in the lungs
Hypercapnia
Blood CO2 gets too high→leads to serious breathing problems and dangerously low levels of oxygen in your blood
Clavicular breathing
Too shallow to be effective, diaphragmatic breathing should be practiced