Ventilation Flashcards
quiet ventilation
sedentary /@ rest
(low metabolic demands)
total lung capacity
5.5 L of air
Vital Capacity
4.5 max volume exhaled after inhalation
tidal volume
.5 @ rest
air moved in/out during each ventilation
Boyels Law
Volume is inversely proportional to pressure
What keeps the rib cage from collapsing with inspiration
intercostals
quiet inspiration - what happens to volume and pressure
expand ribs/lungs = increased volume and decreased pressure
- increase intrathoracic volume
Quiet Expiration
relies on elastic recoil of lungs thorax and connective tissue
- decreases intrathoracic volume
- passive
Dome of diaphragm drops ___ in quiet expiration
1.5
Forced inspiration
increased volume
increased pressure = air in
how much does the dome of the diaphragm flatten during forced inspiration
6-10cm
Forced Expiration Direct & Indirect effects
Direct: flex thorax, depress ribs and sternum
Indirect: increase intrabdominal pressure and compress viscera
- pushes diaphragm up during expiration
Upper 6 Ribs
pump handle
dispaced 25-35 degrees horizontally
Lower 6 Ribs
bucket handle
displaced 35-45 degrees
Costovertebral
costocorporeal & costotransverse
