The cardiac output is not high enough to meet tissue oxygen needs. The Hb is too low. The SaO2 is too low. Oxygen consumption has increased without an increase in oxgyen delivery.

What does decreased SvO2 mean?

The normal SvO2 ranges between 60-80%. If SvO2decreases, it indicates that the tissues are extracting a higher percentage of oxygen from the blood than normal. In otherwords, a decreased SvO2 indicates that the cardiac output is not high enough to meet tissue oxygen needs.

What happens to SvO2 in sepsis?

This is referred to as the critical extraction ratio (ERO2crit). impaired, ERO2crit increases and the minimal “safe” SvO2 rises. This has led to the commonly recommended SvO2 target of 70% or greater in patients with septic shock. Mixed venous blood can be sampled only from the right ventricle or pulmonary artery.