What is the normal oxygen extraction percentage corresponding to a ScvO2 greater than 65%?

A ScvO2 greater than 65% typically indicates that there is a sufficient level of oxygen delivery to the tissues, and it reflects the balance between oxygen delivery and oxygen consumption. At this level of ScvO2, the body is extracting a moderate amount of oxygen from the blood.

The normal oxygen extraction percentage for tissues, corresponding with an ScvO2 above 65%, generally falls in the range of 25-30%. This reflects the physiological norms in which the body effectively utilizes available oxygen. Oxygen extraction is an important metric since it shows how well tissues are using the oxygen delivered. If the extraction is too low, it could indicate that tissues are not utilizing the oxygen efficiently, potentially due to some pathological process, whereas too high of an extraction percentage could signify that tissues are in a state of increased demand or reduced delivery.

This context helps to understand why the range of 25-30% is appropriate when ScvO2 levels exceed 65%, representing a healthy balance and adequate tissue oxygenation under normal physiological conditions.