Pressure volume loops
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15 Terms
work of respiration
0AECD
work to overcome elastic resistance
0ABCD
work to overcome non-elastic resistance
AECF
work to overcome non-elastic resistance during inspiration
AECB
work to overcome non-elastic resistance during expiration
ABCF
restrictive lung disease
no change in airway resistance
lung compliance decreased, curve shifted right
obstructive lung disease
increased lung compliance
airway resistance has increased
obstructive lung disease - elastic resistance
similar work to overcome
obstructive lung disease - non-elastic resistance
more work to overcome non-elastic resistance - inspiration (ABCF)
more work to overcome non-elastic resistance - expiration (ABCF), a more positive expiratory pressure is required (DFO area increases, expiration becomes active process
obstructive lung disease - what is neesed
more negative intrapleural pressure (Pip) required to move the same amount of air (inspiratory flow rates, 0AECD area increases)
obstructive lung disease
restrictive lung disease - elastic resistance
more work to overcome elastic resistance (0ABCD)
restrictive lung disease - non-elastic resistance
no change in work to overcome non-elastic resistance (inspiration, AECB and expiration ABCF)
restrictive lung disease - what is needed
a more negative Pip requred for same amount of air (inspiratory flow rates, increased 0AECD area), increases work of breathing
restrictive lung disease