P/N 53063-50, Manual Revision: B
Automatic Operation: Cell Salvage
5-21
Volume
Accounting
Function
The Volume Accounting Function
of the CS5+ allows the operator to monitor the
approximate fluid volume processed and the approximate fluid volume returned
to the patient by the CS5+. This information is constantly displayed during each
mode, and is being constantly updated.
Note: Volumes displayed are approximate. The volumes are calculated by mL per
pump revolution.
To ensure the accuracy of the Volume Accounting Function it is important to
observe the following guidelines:
1. Do not allow the O.R. suction to be regulated too high. Vacuum settings in
excess of 200 mmHg could compromise the efficiency of the CS5+ occlusive
roller pump. This would compromise the accuracy of the Volume
Accounting Function which assumes a certain volume of fluid per pump
revolution.
2. Subsequent to RESERVOIR EMPTY displays, do not press the START key
until at least 400 ml of fluid accumulate in the reservoir. Processing smaller
volumes may cause the Volume Accounting Function to overestimate the
PROCESSED VOLUME. Because the red reservoir line contains no fluid
whenever the reservoir is drained, the air in the length of tubing from the
pump to the reservoir is pumped into the bowl before fluid may be pumped.
Frequently RESUMING for small amounts of fluid will cause a
disproportionate ratio of air to fluid. (Remember that the CS5+ can usually
process 500 ml (or 125ml for the 70 ml bowl) of fluid in approximately one
minute.
Note: The reinfusion VOLUME display will read approximately 40 ml too high
because of the 40 ml of fluid trapped in the blue line until the end of the
procedure. WHEN USING THE 70 ML BOWL, 20 ML OF FLUID WILL BE IN THE
BLUE LINE. (An example illustrating this relationship is shown in the following
paragraph.) Remember to subtract this 40 ml from the readout until the blue line
is drained at the end of the procedure and the 40 ml (OR 20 ML) are recovered.
Note: Accurate volume accounting and WASH monitor functions require that all
clamps are open and that no kinks, twists, or flat spots which prohibit fluid flow
are present in the tubing.
REINFUSION
VOLUME
Display
Actual Volume
Returned to
Reinfusion Bag
200
160
400
360
600
560
