6. Asthma Flashcards
asthma is reversibility of airflow obstruction with symptoms worse at night or in the early morning with prolonged expirations and diffuse wheezes on PE. There is a limitation of?
airflow on pulmonary function testing or positive methacholine challenge (broncho-provocation)
CLinical symptoms of asthma include, cough, wheeing, chest tightness, prolonged exhalation and ?
shortness of breath
Asthma causes airway walls to become inflamed and thickened and well as what of the smooth muscles?
tightening and proliferation
**exposure to allergens can trigger astham - Mast cells play large role
Prolonged status asthmaticus is characterized by charcot leyden crystals (found in sputum/lavage, composed of eosinophil break down products galectin10) and is also characterized by what, which are characteristic in sputum- extrusion of mucus plugs from sub-epithelial mucous gland ducts or bronchioles?
Curschmann sprials
What is a characteristic finding of chronic asthma, associated with thickening of airway wall, fibrosis, inc vascularity, inc submucosal glands, usually contributing to chronic irreversible airway obstruction?
Airway remodeling
The strongest predisposing factory to asthma is atopy -exposure to inhaled allergens, as well as nonspecific precipitants such as URI, sinusitis, aspiration and?
exercise
In differentiating between COPD and bronchial asthma FEV1 and FEV1/FVC ratio never returns to normal with drug therapy however in asthma what occurs?
FEV and the ratio most likely returns to normal!
volume curves of COPD look like a chair while volume curves for asthma (scooped) have pre broncodilator concavity like COPD but then?
improves post bronchodilator (COPD does not)
What type of dysfunction occurs in tall thin young women, usually runners which on volume curves can see a truncated inspiratory loop?
Vocal cord dysfunction (VCD)
*flat bottom of graph
What is characteristic of restrictive lung disease on volume curves?
Decreased total volume
What is the most common medication for quick relief of asthma?
B2 agonists - SABA- ALBUTERAL (or levalbuterol)
What anticholinergic may be used for the first 24 hours of an acute attack along with albuterol?
ipratropium
Long term control asthma medications include ICS and leukotriene modifiers, ICS include beclomethasone, budesonide and?
fluticasone (Dr Newman likes this)
Leukotriene modifiers which are released by mast cells include montelukast and zafirlukasts -LT receptor antagonists and zileuton which is a 5-lipoxygenase inhibtor are great for managing?
allergies too
The following characteristics are common of what respiratory distress?
breathlessness at rest, is silent, drowsy/confused, RR >30 per min, no wheezing, bradycardia, FEV1 <25% predicted, etc
Respiratory arrest imminent