·
In
the obstructed lung vital capacity is ¯ by an ever residual volume.
·
¯IRV
·
¯ TV
·
¯ ERV
·
¯ VC
·
¯ RV=¯ TLC
·
¯ FEV1
·
¯ Compliance
·
Restrictive
lung disease
·
¯ compliance
·
recoil
·
patent
airways
·
¯ RV
·
¯ ERV
·
¯ IRV
·
¯TV
·
¯ TLC
·
FEV1/FVC
·
Both
conditions have a ¯ ventilation
Dead
Space
·
Is
equal to the conducting zone
·
Air
in the lungs that is not used for respiration
·
Measures
150ml.
·
Includes
the trachea, bronchi, and terminal bronchiolesà anatomical dead space—the air in CPR comes from air
·
No
more than 150ml should be in the dead space at one time
·
Respiratory
zone starts from the respiratory bronchiole to the alveoli.à If the blood to the area is restricted or
reduced (embolism) due to:
·
Resduced
CO
·
Massive
vasoconstrcition
·
Embolism
·
In
the case above and w/ the absence of perfusion, than there is an alveolar dead
space which is not normal.
·
Anatomical
dead space + alveolar dead space = physiological dead space.
·
In
health anatomical dead space = physiological dead space, which = 150ml.
·
In
disease the physiological dead space