Hemodynamics Flashcards
effect of PPV on afterload?
decreases LVTM thereby decreasing afterload
how does fluid lead to increased contractility?
increase preload leads to increased calcium affinity thereby increasing contractility
threshold of PPV to predict volume responsiveness?
> 13%
limitations of PPV for volume responsiveness?
sinus rythym, no spont ventilation, no dyssynchrony, TV 8-10cc/kr
things that can cause and overdamped a line?
obstruction of tip or hypovolema
things that can cause a underdamped a line?
vasocontriction, excessive tube length
CVP prominent a wave?
PHTN, tricuspid stenosis
CVP prominent v wave?
TR
CVP prominent A/V wave?
tamponade, pericarditis
CO equation?
MAP-CVP/SVR
thermodilution calculation of CO?
AUC using temperature
Fick versus thermodiluation of the CO measurement?
Fick more accurate but you need a Vo2 measurement
CVP with an IVC <1.5cm?
0-5
CVP with an IVC <1.5-2.5 cm with >50% variation?
5-10
CVP with an IVC 1.502.5 cm with <50% variation
10-15