Edwards HemoSphere

200
HemoSphere Advanced Monitor C Equations for Calculated Patient Parameters
O
2
ER Oxygen Extraction Ratio
O
2
ER = (Ca-vO
2
/ CaO
2
) x 100 (%)
where:
CaO
2
– Arterial Oxygen Content, mL/dL
Ca-vO
2
– Arteriovenous Oxygen Content Difference, mL/dL
%
PVR Pulmonary Vascular Resistance
PVR = {(MPAP - PAWP) x 80} /CO
PVR = {(MPAP
SI
- PAWP
SI
) x 60} /CO
where:
MPAP – Mean Pulmonary Artery Pressure, mmHg
MPAP
SI
– Mean Pulmonary Artery Pressure, kPa
PAWP – Pulmonary Artery Wedge Pressure, mmHg
PAWP
SI
– Pulmonary Artery Wedge Pressure, kPa
CO – Cardiac Output, l/min
dyne-s/cm
5
kPa-s/L
PVRI Pulmonary Vascular Resistance Index
PVRI = {(MPAP – PAWP) x 80} /CI
PVRI = {(MPAP
SI
– PAWP
SI
) x 60} /CI
where:
MPAP – Mean Pulmonary Artery Pressure, mmHg
MPAP
SI
– Mean Pulmonary Artery Pressure, kPa
PAWP – Pulmonary Artery Wedge Pressure, mmHg
PAWP
SI
– Pulmonary Artery Wedge Pressure, kPa
CO – Cardiac Index, L/min/m
2
dyne-s-m
2
/cm
5
kPa-s-m
2
/L
RVSWI Right Ventricular Stroke Work Index
RVSWI = SVI x (MPAP – CVP) x 0.0136
RVSWI = SVI x (MPAP
SI – CVP
SI
) x 0.0136 x 7.5
where:
SVI – Stroke Volume Index, ml/beat/m2
MPAP – Mean Pulmonary Artery Pressure, mmHg
MPAP
SI
– Mean Pulmonary Artery Pressure, kPa
CVP – Central Venous Pressure, mmHg
CVP
SI
– Central Venous Pressure, kPa
g-m/m
2
/beat
SV Stroke Volume
SV = (CO/PR) x 1000
where:
CO – Cardiac Output, L/min
PR – Pulse rate, beats/min
mL/beat
SVI Stroke Volume Index
SVI = (CI/PR) x 1000
where:
CI – Cardiac Index, L/min/m
2
PR – Pulse rate, beats/min
mL/beat/m
2
Table C-1 Cardiac and oxygenation profile equations (continued)
Parameter Description and formula Units
Status = Released Printed Date: 2018-01-16 Released Date: 2017-09-14