So thanks for watching and I hope to see you again soon. If you want to learn how Medmastery can help you become a great clinician, make sure to watch the about mastery video. The level of high flow is directly proportional to the reduction in fraction of dead space ventilation, clearance of exhaled carbon dioxide and improvement in ventilatory efficiency. Absolutely, make sure to check out the course this video was taken from and to register for a free trial account which will give you access to select the chapters of the course. Moreover, the patient may subjectively feel less flow-hungry and demonstrate decreased work of breathing thereby reducing anxiety. So, an elevation in arterial carbon dioxide tension would only be seen when the patient can't sustain the overall level of ventilation necessary to compensate. These individuals can compensate for the increase in Dead Space by increasing the overall level of ventilation to keep pa co2 constant. However, in most disorders characterized by an increase in lung areas with high v Q hypercapnia does not occur. Conceptually, any alveolar units with v Q greater than one, but not infinity, can be described as if the units were functionally equivalent to areas of Deadspace.Īreas of high v Q or physiologic Deadspace represent regions of wasted ventilation as far as carbon dioxide elimination is concerned. The space in between the curves represents the amount of energy/work needed to. Another form of abnormal ventilation perfusion relationship can be seen as a result of alveolar units with ventilation, but no persistent perfusion. ventilation thus needs high peri-operative inflation pressures.

Dead-space ventilation