Aeration_Function

Aeration Function Aeration Function Respiration: The mov’t of gases to provide E (O2) & eliminate waste products (CO2). 4 Stages of Ventilation: 1. Ventilation – mov’t of O2 in & CO2 out of the alveoli. 2. Ex∆ of gases across the alv – cap membrane (O2 to pul cap & CO2 t o alv). 3. Transport of gases in the blood. 4. Ex∆ of gases at the tissue level. Alv are considered gas ex∆ areas & everything above the alv are ventilated only. Pul artery carried de O2 blood back to the cap which encloses the alv & hbg becomes O2, the pul vein carries O2 Hgb to the L.A. & then pumps it out to the rest of the body. Lymph sys is imp with ARDS B/c it cleans up excess debris & fluid in the interstitial spaces. CHF there is a back up of blood & fluid into the pul vein ↑P in the pulvein so fluid travels into interstitial spaces, usually the lymph system carries it away, but it becomes too much, seeping into alv causing pul edema. Tidal Volume: VT =amt of air exhaled after a N inhal N= 7-9 cc/kg Ie. 70 kg man (7-9 cc/kg ) = 490-630 cc This calc increase, o2, lung, vol, decrease, alv, wob, vent, resistance, pul, comp, air, out, airway, vt, co2, ve, pt, inhal, gases, cap, breathing, surface, space, layer, increased, flow, diffusion, b/c, tissue, tension, slow, process, muscles