Table of Contents
What is a normal stroke volume variation?
The normal range of SVV under controlled ventilation is less than 10-13%.
What is SV and SVV?
Variations in stroke volume (SV) and pulse pressure (PP) occur as a result of interactions between the cardiovascular and respiratory systems. An alternative to SV optimisation is to minimise the variation in either SV or PP across the respiratory cycle.
What is a Vigileo monitor?
The Vigileo monitor measures continuous cardiac output when used with the FloTrac sensor. Stroke volume and stroke volume variation are also measured and displayed on the monitor. Continuous SVR is calculated and displayed when interfaced with the patient’s bedside monitor.
What is normal RA pressure?
The RA pressure is the “filling pressure” of the right heart. It reflects venous return to the RA and RV end-diastolic pressure. Normal RA pressure is 3–7 mmHg (Table 2).
What is PPV in arterial line?
Pulse pressure variation (PPV), which quantifies the changes in arterial pulse pressure during mechanical ventilation, is one of the dynamic variables that can predict fluid responsiveness.
What is PPV cardiac?
Pulse pressure variation (PPV) is a marker of the position on the Frank–Starling curve, not an indicator of blood volume or a marker of cardiac preload. Increasing preload induces a decrease in PPV (from. to. ). PPV is mimimal when the heart is operating on the plateau of the Frank–Starling curve (
How do you zero Vigileo?
Rotate the navigation knob on the Vigileo monitor to Zero and press the knob. Select Return to exit screen.
What causes SVR to increase?
Peripheral vascular resistance (systemic vascular resistance, SVR) is the resistance in the circulatory system that is used to create blood pressure, the flow of blood and is also a component of cardiac function. When blood vessels constrict (vasoconstriction) this leads to an increase in SVR.
What is RA and RV?
LV, left ventricle; RA, right atrium; RV, right ventricle.
What is mildly elevated RA pressure?
Step 2: Estimating the RA Pressure Mildly increased size (2.0 to 2.5 cm) or decreased respiratory variation signifies mildly elevated right atrial pressure (10 to 15 mm Hg). A dilated inferior vena cava (>2.5 cm) and decreased respiratory variation signify elevated right atrial pressure (>15 mm Hg).
What is PPV pulse pressure variation?
Pulse pressure variation (PPV) is a marker of the position on the Frank–Starling curve, not an indicator of blood volume or a marker of cardiac preload. Increasing preload induces a decrease in PPV (from to ). PPV is mimimal when the heart is operating on the plateau of the Frank–Starling curve ( and ).