User's Manual

Cardiac Output
19-9
Displaying Calculations Table
You can view hemodynamic calculations after storing or averaging data. The table
includes only those calculations that have been stored or averaged.
Table 1 shows an example of the hemodynamic calculations table displayed when
you touch the CALCS key. Each horizontal row is one complete set of data. Each
new value appears at the bottom of the table. The system defaults to VR INDEX
OFF and SW INDEX OFF.
The system automatically calculates and enters CO and CI values in the table.
Values in the columns SV, SVI, SVR, PVR, LVSW, and RVSW are automatically
calculated from the vital sign values entered in the columns HR, MAP, CVP, MPA,
and PCWP.
The values under the columns HR, MAP, CVP, MPA, and PCWP are parameter
values obtained from other channels in the bedside monitor at the time a CO
value is calculated or those values you have entered manually. To enter values in
these columns refer to Editing Vital Sign Values on page 19-10.
If you do not enter height and weight values prior to generating CO curves, the
monitor displays any value that uses BSA (e.g. CI, SVI, LVSWI and RVSWI)
as ?.?. If a calculated value is out of the displayable range, the monitor displays
the value as ++++. If any of the vital signs in the hemodynamics table are
negative, the system uses the value 0 (zero) in the calculations.
The equations used for the hemodynamics table are defined in the table to the
left.
Table 1: Sample Calculations
DAY/TIME CO CI SV SVI SVR PVR LVSW RVSW HR MAP CVP MPA PCWP
26/02:25p
5.1 2.9 70.8 40.4 1629 235 54.9 10.4 72 110 6 25 10
27/09:30p
4.9 2.8 65.3 37.8 1712 211 51.4 9.2 75 112 7 25 12
28/10:15p
4.5 2.5 56.2 32.1 1917 213 44.5 7.8 80 115 7 25 13
29/07:30a
4.0 2.2 47.0 26.8 2237 219 38.2 6.5 85 120 8 26 15
30/08:30a
4.0 2.2 47.0 26.8 2237 219 38.2 6.5 85 120 8 26 15
!
• The vital sign values shown in Table 1 are typical if your
monitor's UNITS OF MEASURE key is set to mmHg. Consult
your system administrator if your display is different from that
shown here.
To display the calculations table:
1 Touch CO.
2 Touch CALCS.
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)/CO]
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
PVR
= 79.9 x [(MPA-
PCWP)/CO]
PVRI
= 79.9 x [(MPA-
PCWP)/CI]
= 79.9 x [(MPA-
PCWP)]/[CO/BSA]
= 79.9 x [(MPA-
PCWP)]/[CO x 1/BSA]
= 79.9 x [(MPA-
PCWP)/CO] x BSA
= PVR x BSA