Ventilation Due to gravitational influence on intra plural pr lower zones better ventilated -6 -3 -1 Intra pleural pr Rt lung more ventilated than Lt lung Due to gravitational influence on intra plural pr lower zones better ventilated Ventilation Ventilation is unevenly distributed in the lungs. Pulmonary circulation – Alveolar Perfusion Q ZONE-I: Only exist if Ppa very low in hypovolemia / PA in PEEP ZONE-II: Perfusion α Ppa-PA arterial-alveolar gradient ZONE-III: Perfusion α Ppa-Ppv arterial-venous gradient ZONE-IV: Perfusion α Ppa-Pist arterial-interstitial gradient Pulmonary Perfusion Pulmonary blood flow 5l/min Total pulmonary blood volume -500ml to 1000ml These volume going to be spreaded all along the alveolar capillary membrane which has 50 to 100 m² surface areaĭistribution of Pulmonary Perfusion Due to gravitational influence the lower – dependent areas receive more blood Upper zone – nondependent areas are less per fused KEY POINTS ALVEOLAR VENTILATION–(V A) ALVEOLAR PERFUSION- PULMONARY CIRCULATION (Q) VENTILATION – PERFUSION RATIO (VA/Q) VENTILATION PERFUSION MISMATCH SHUNT DEAD SPACE
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |