What is the oxygen content equation?

The constant, 1.36, is the amount of oxygen (ml at 1 atmosphere) bound per gram of hemoglobin. The exact value of this constant varies from 1.34 to 1.39, depending on the reference and the way it is derived….Oxygen Content.

CaO2 = 1.36 * Hgb * SaO2 + 0.0031 * PaO2

What is the oxygen content of blood?

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.

How is arterial oxygen measured?

Oxygen saturation can be measured using a pulse oximetry device, which is a non-invasive method to measure arterial oxygen saturation level. See Figure 4.1 for a pulse oximeter. In critically ill clients, a more invasive and continuous monitoring system is used to measure arterial blood gases through an arterial line.

How do you calculate arterial oxygen pressure?

The alveolar gas equation is of great help in calculating and closely estimating the partial pressure of oxygen inside the alveoli. The alveolar gas equation is used to calculate alveolar oxygen partial pressure: PAO2 = (Patm – PH2O) FiO2 – PACO2 / RQ.

How do you calculate arterial oxygen content?

Oxygen content — The arterial oxygen content (CaO2) is the amount of oxygen bound to hemoglobin plus the amount of oxygen dissolved in arterial blood: CaO2 (mL O2/dL) = (1.34 x hemoglobin concentration x SaO2) + (0.0031 x PaO2) where SaO2 is the arterial oxyhemoglobin saturation and PaO2 is the arterial oxygen tension.

What is the formula for total oxygen content?

The oxygen content is essentially dependant of the oxygen carried by hemoglobin and oxygen dissolved in plasma does not make a significant contribution to CaO2 and CvO2. Thus, it is usually acceptable to use the abbreviated formula for oxygen content: CaO2 = Hb x 1.39 x SaO2.

What is the normal oxygen content of blood?

Oxygen saturation level in healthy patients is considered normal between 97 percent and 99 percent. Patients who have normal hemoglobin levels can have a saturation level of 95.

What is the equation for oxygen content?

The arterial oxygen content equation: CaO2 = (1.34 * Hb * SaO2) + (0.0031 * PaO2). The normal oxygen combining capacity is 1.39 mls/gram, however due to abnormal forms of hemoglobin such as carboxyhemoglobin and methemoglobin this value is reduced to 1.34 mls/gram.