What is the normal value for CvO2?
CaO2 – CvO2 range from 13 to 74 ml l-1. The mean within-patient sd was 6.8 ml l-1 and the overall between-patient sd was 10.9 ml l-1.
What is arterial oxygen content CaO2?
CaO2 is arterial oxygen content. Unlike either PaO2 or SaO2, the value of CaO2 directly reflects the total number of oxygen molecules in arterial blood, both bound and unbound to hemoglobin. CaO2 depends on the hemoglobin content, SaO2, and the amount of dissolved oxygen.
What is normal arterial oxygen content?
Normal arterial oxygen is approximately 75 to 100 millimeters of mercury (mm Hg). Values under 60 mm Hg usually indicate the need for supplemental oxygen. Normal pulse oximeter readings usually range from 95 to 100 percent. Values under 90 percent are considered low.
What is venous oxygen content?
Venous oxygen content reflects the capacity to extract oxygen from the blood as it flows through the muscle. It is determined by the amount of blood directed to the muscle (regional flow) and capillary density. Muscle blood flow increases in proportion to the increase in work rate and thus the oxygen requirement.
What is CaO2 and CvO2?
CaO2 = arterial Oxygen Content (mL/dL) CvO2 = mixed venous Oxygen Content (mL/dL)
How do you interpret CvO2?
This represents a different way that cvO2% may be interpreted, as a measurement of the oxygen extraction ratio:
- cvO2% < 50% suggests inadequate systemic oxygenation (oxygen extraction ratio >50%)
- cvO2% >70% suggests adequate systemic oxygenation (oxygen extraction ratio < 30%)
What does a low CaO2 mean?
Arterial oxygen content (CaO2) represents the amount of oxygen delivered to the tissues. We hypothesize that low levels of CaO2 in community-acquired pneumonia (CAP) could have a systemic impact.
What does CvO2 mean?
|CvO2||central venous oxygen saturation|
|CvO2||cerebral venous oxygen content|
What is normal venous po2?
TABLE I: Arterial and venous blood gas reference range
|pCO2 (mmHg)||35 -45||41 – 51|
|PO2 (kPa)||10.6 – 13.3||4.0 -5.3|
|pO2 (mmHg)||80-100||30 -40|
What is CaO2 and cvo2?
For CaO2 = 20.1 ml/100 ml and Q = 5 l/min: The oxygen returned is given by the product of the mixed venous oxygen content (CvO2) and the cardiac output. For CvO2 = 15.2 ml/100 ml and Q = 5.0 l/min:
How do you calculate CaO2 value?
CaO 2 = Oxygen content of arterial blood (Hb x 1.34 x SaO 2) + (PaO 2 x 0.003) = Oxygen content of mixed venous blood (the line over the v for venous indicates it is mixed venous sample and should be included, unfortunately it is hard to add in with conventional fonts!)
What does SvO2 and PvO2 mean?
Mixed Venous Oxygen Content (CvO2) SvO2 is the percentage of available hemoglobin that is saturated with oxygen, this value is from a direct measurement of an venous blood gas. 0.0031 is the solubility coefficient of oxygen at body temperature. PvO2 is the mixed venous oxygen tension.
What is the difference between cvo2 and Q for oxygen uptake?
For CvO2 = 15.2 ml/100 ml and Q = 5.0 l/min: Oxygen uptake is the amount of oxygen taken up by the tissues that can be calculated from the difference between oxygen delivery and the oxygen returned to the lungs in the mixed venous blood.