Haemonetics LN9000-110-EWC, Руководство по эксплуатации

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Describing the MCS+ Cabinet Components 2-7
P/N 85213-30, Manual revision: B
Pressure
monitors
The electronically controlled pressure monitors function with the correlating
filter on the disposable set to measure pressure in the disposable tubing. The pres-
sure monitors provide feedback to the system about the flow of blood compo-
nents to and from the donor (DPM) as well as the centrifuge bowl (SPM). The
MCS+ programming will automatically regulate the speed of the pumps based on
this information.
Caution: Once the DPM/SPM and the disposable set filters have been connected,
they should not be disrupted at any point to ensure proper pressure readings.
Figure 2-5, Existing variations in pressure monitor style
(without and with filter installed)
Donor Pressure Monitor (DPM)
The DPM, located on the left side of the MCS+ top deck, measures pressure in
the donor-line tubing. The information is depicted on the display screen using a
bar graph. The bar graph is visible on the screen when donor pressure is adequate
to maintain the programmed pump speed. The bar graph will not be visible if
donor-line pressure is below what is required to maintain the programmed pump
speed.
Variations will exist in the readings, depending on the operating mode. The
MCS+ software is programmed to detect a range of “normal” values. If a pressure
reading varies outside of this range, the MCS+ safety system will stop the pumps
and provide an explanatory screen message, as well as an intermittent alarm.
DRAW mode
The pressure readings will vary as blood is drawn from the donor. If a significant
pressure decrease is detected and the DPM readings drop below a programmed
value, the pump speed will automatically decrease until a sufficient pressure
increase is measured.
If the donor-line pressure is measured as insufficient, the pumps will stop, the NO
FLOW indicator lights will be visible and an explanatory screen message will
appear with an alarm. Once pressure is measured to be within normal operating
range, the pumps will resume their programmed speed.