ventilation Flashcards
what is an obstructive respiratory disease
– Airway narrowing
– Increased airway resistance
– Reduced flow during expiration
what are examples of a restrictive respiratory diseases
Scar tissue formation
Fibrosis
why is alveolar ventlation less than pulmonary ventilation
due to anatomic dead
space that is useless for exchange
what is Pulmonary Minute Ventilation
Total volume of air entering and leaving respiratory system each minute
what are examples of obstructive respiratpry diseases
emphysema, chronic bronchitis, asthma
what are the two classifications of respiratory diseases
obstructive and restrictive
how to calculate alveolar ventilation
(tidal volume – dead space) x
respiratory rate
what is alveolar ventilation
Volume of air exchanged between the atmosphere and
the alveoli per minute
how do you calculate minute ventilation
tidal volume x Respiration rate
what are causes of a restrictive respiratory disease
Asbestos fibre breathing
Inflammation
Scar tissue formation
what is treatment for obstructive respiratory diseases
bronchodilators, anti-inflammatory
what is the normal alveolar ventilation
(500-150 mL/br) x 12 br/min =
4200ml/min
what is the normal repsiration rate
12 breaths per minute
what causes obstructive respiratory diseases
o Allergens, dusts
o Smoking, smog & airborne pollutants
o Changes in air temperature, humidity, pressure
o Exercise
o Emotional stress, anxiety
what is a restrictive respiratory disease
- Reduced elasticity
- Reduced compliance of lung and chest wall
- Increased work of breathing
what is noraml tidal volume
500ml
what is normal minute ventilation
500 mL x 12 breaths/min = 6000 mL/min
