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Qp is calculated using the PA sat (72%) and the PV sat (96%) Qp=4.2. Total systemic flow is calculated using the Ao sat (88%) and the Mv sat (72%) But this number includes the R L shunt. If we don’t account for the shunt and use the LA sat of 96%, we can calculate the flow of oxygenated blood to the body (Qeff) 72% 96%.
10 Σεπ 2024 · Venous oxygen saturation (SvO2) measures the blood's oxygen content returning to the right side of the heart after perfusing the entire body. When the oxygen supply is insufficient to meet the metabolic demands of the tissues, an abnormal SvO2 ensues and reflects an inadequacy in systemic oxygenation.
Central venous oxygen saturation (ScvO2) surrogate for SvO2 thus provides a surrogate measure of oxygen flux, reflecting the balance between oxygen delivery (DO2) and consumption (VO2).
systemic vascular resistance, mixed venous oxygen saturation and core body temperature. Indications and uses: Monitoring of pulmonary artery pressures and pulmonary artery wedge pressures. Administration of fluids and medication through a central line. Cardiac output determination via the thermodilution technique.
15 Δεκ 2023 · mixed venous PO2 (PvO2): low value -> intracellular hypoxia, high value -> doesn’t exclude histiotoxic hypoxia or tissue shunting. mixed venous oxygen saturation (SvO2): normal = 0.7-0.8, hypoxia + lactate acidosis = 0.3-0.5, > 0.8 = high flow states (sepsis, hyperthyroidism, severe liver disease)
Pressure measurements along its length allows for direct measurement of CVP, pulmo-nary artery pressure, pulmonary capillary occlusion (wedge) pressure, and CO. PACs also allow for indirect measurement of systemic vascular resistance, stroke volume, and oxygen delivery among others.
Correct clinical interpretation of S v − O2, or its properly measured Scv O2 surrogate, can be used to (1) estimate cardiac output using the Fick equation, (2) better understand whether a patient's oxygen delivery is adequate to meet their oxygen demands, (3) help guide clinical practice, particularly when resuscitating patients using validated ...
