User's Manual

Calculations
25-11
Hemodynamic Calculations require several specific pressure values, including
CVP, MAP, and PCWP. CVP and MAP are monitored continuously; PCWP is an
episodic value. A data substitution may occur if any of these pressure values are
not available when you touch NEW ENTRY. When a substitution occurs, one of
the error messages listed here displays on the message line.
• Warning...RAP has been substituted for CVP.
A continuous RAP value is used instead of the continuous CVP value if CVP
is not available.
• Warning...NIBP has been substituted for MAP.
An episodic mean NIBP value which is less than 15-minutes old is used
instead of MAP if the continuous MAP value is not available.
• Warning...LAP has been substituted for PCWP.
A continuous LAP value is used instead of the episodic PCWP value if the
PCWP value is not available or is more than 15-minutes old.
Table 3: Hemodynamic Output
Label Name Units
CI Cardiac Index L/min
2
SV Stroke Volume ml/beat
SVI Stroke Volume Index ml/beat/m
2
SVR Systemic Vascular Resistance dynes x sec/cm
5
SVRI Systemic Vascular Resistance Index (dynes x sec/cm
5
) x m
2
PVR Pulmonary Vascular Resistance dynes x sec/cm
5
PVRI Pulmonary Vascular Resistance Index (dynes x sec/cm
5
) x m
2
LVSW Left Ventricular Stroke Work g x min/beat
RVSW Right Ventricular Stroke Work g x min/beat
LVSWI Left Ventricular Stroke Work Index g x min/beat/m
2
RVSWI Right Ventricular Stroke Work Index g x min/beat/m
2
Table 4: Hemodynamic Equations
BSA = Ht
0.725
x Wt
0.425
x 0.007184
CI = CO/BSA
SV = (CO/HR) x 1000
SVI = SV/BSA
SVR = 79.9 x [(MAP-CVP)/C
O]
SVRI
= 79.9 x [(MAP-CVP)/CI]
= 79.9 x [(MAP-CVP)]/[CO/BSA]
= 79.9 x [(MAP-CVP)]/[CO x 1/BSA]
= 79.9 x [(MAP-CVP)/CO] x BSA
= SVR x BSA