extrinsic bronchial asthma

Question 1

definition

Answer 1

• known as atopic or allergic type of asthma

Question 2

etiology

Answer 2

• hypersensitivity of airway to various allergens.
• exposure to home dust with various fungal spores, bacteria
• contact with domestic animals- fur and feaces
• specific food intake- fish, egg, milk, wheat
• specific drugs- aspirin
• exposure to occupational dusts and chemicals
• pollen grains
• pseudoallergic variant

Question 3

clinical picture

Answer 3

• attack occurs immediately after exposure to allergen
• edematic face
• Forced posture of body with hands on the edge of bed and shoulders are fixed.

Question 4

investigation

Answer 4

1. Blood test- eosinophilia, lymphocytosis
2. serological test- increase level of Ig E
3. X-ray of chest- normal transparency with signs of hyperinflation and signs of pneumothorax
4. sputum analysis- eosinophils, chancat Leydon crystals, and Churshman spirals
5. spirogram- alteration of PEFR, FEV, VC of respiration
6. Arterial blood gases analysis- decrease in PO2 and PCO2
7. skin allergy test- positive result
8. ECG- cor pulmonale