Pulmonary Diseases Flashcards
What keeps distal air sacs open?
Elastic tension in alveolar walls.
How does malnutrition impact breathing ability?
Breakdown muscles which are used in breathing- like diaphragm and intercostal muscles.
What is gas exchange proportional to?
Directly proportional to area and indirectly proportional too thickness.
What are some respiratory functions beyond just breathing (6)?
Filter/warm/humidify air, immune response, dude thesis of surfactant (prevents alveolar collapse and helps immunity), regulated acid-base balance, synthesis of arachidonic acid, conversion of angiotensin 1->2
Define exacerbation.
Worsening of symptoms.
Define oxygen saturation/desaturation.
Amount of oxygen dissolved in the blood (% of Hb bound with o2)
Define hypercapnia.
Excessive accumulation of CO2 in the blood.
Define dyspnea.
Laboured breathing or SOB.
Define DOE
Dyspnea on exertion.
Define pulmonary Cachexia.
Malnutrition associated with advanced lung disease.
What is respiratory failure?
Acute or chronic condition where pulmonary function is markedly impaired. Often requires a ventilator.
What is pulmonary hypertension?
Pulmonary arteries that carry blood from the heart to the lungs become narrowed and raises blood pressure. Strain on the right ventricle of the heart, expands in size.
What is cor pulmonale?
Right ventricular enlargement secondary to a lung disorder that produces pulmonary artery hypertension. Right ventricular failure (heart failure).
What is pulmonary edema and what is it usually caused by?
Fluid accumulation in the lungs. Most often due to heart failure or direct lung injury.
What nutrition related status contributes to pulmonary edema?
Low visceral protein status decreased colloid osmotic pressure, allowing fluid to move into interstitial spaces.
What are some symptoms of pulmonary edema?
Difficulty breathing, coughing up blood, excessive sweating, anxiety, pale skin, pink frothy sputum.
What is the cycle of malnourishment seen in respiratory diseases?
Decreased lung function-> increased symptoms -> lower food intake -> malnourishment -> decreased lung function
What are 5 effects of malnutrition on the pulmonary system?
Effects lung structure, increases infection risk, diminished oxygen carrying capacity (protein + Fe), hypoproteinemia edema effect, less surfactant (collapse alveoli)
What non nutritional aspects contribute to muscle atrophy in pulmonary disease?
Very inactive usually, and have increased protein breakdown pathways because of the inflammation + catabolic meds used.
What determines the acidity of your blood?
How much oxygen and CO2 is in your blood.
What does the CO2 blood test really measure?
The blood bicarbonate level.
What is normal blood pH?
7.35-7.45
What is normal oxygen saturation?
96-100%
When you have an excess of CO2 what happens to the pH?
Acidosis.
What does the body compensate for blood acidosis?
Kidney increases net excretion of H+ and retains HCO3 with either NA or K.
What is one cause of respiratory alkalosis?
Hyperventilation.