Belmont FMS2000 - Automatic Air Purging; Bolus Infusion; Recirculation Mode

3. Operation & System Set-up
3-31
• Automatic Air Purging
After every 500 ml of fluid infused, the diversion valve will momentary switch into
the recirculate position for a short duration to automatically remove air from the
main system fluid circuit into the reservoir chamber. Air in the reservoir chamber
may be vented out the hydrophobic filter or back into the fluid bag if bag spikes
attached to fluid bags are opened. The RATE status line displays REMOVING
AIR during this process. The volume readout (VOL) remains unchanged during
automatic air purging and resumes counting when infusion resumes. This
process is automatic and requires no operator action.
The recirculate rate is temporarily set to 500 ml/min, if the flow rate is set
at #500 ml/min. The recirculation rate is set at the actual flow rate, if flow
rate is > 500 ml/min, during automatic air purging. When infusion
resumes, the system returns to the previously set rate.
BOLUS INFUSION, INFUSE A FIXED VOLUME
• Press BOLUS to deliver the fixed volume indicated on the key at a rate of 200
ml/min. The bolus volume is set at the factory to 200 ml. This can be changed in
the Calibration/Set-Up screen (see Chapter V) or by pressing and holding the
BOLUS key in the Infuse screen: The new bolus volume will appear in the VOL
(volume) status line with the prefix of BOL (bolus). Releasing the Bolus key will
start the infusion. To change the flow rate during the bolus infusion, press the
RATE ▲, RATE ▼, or 500 ml/min keys. At the end of the bolus volume, the
system beeps and returns to the previously selected flow rate if the previous rate
was 50 ml/min or lower. If the previous rate was higher than 50 ml/min, the flow
rate will be set to 50 ml/min.
RECIRCULATION MODE
• The RECIRC key sets the system into the Recirculation mode. The diversion
valve shuts off the infusion line to the patient and recirculates the fluid through
the system at a preset rate of 200 ml/min. The infusate in the reservoir chamber
and the main system will be warmed and air in the line swept into the reservoir
chamber. The system will automatically beep and return to the Stop mode after
5 minutes of recirculation if the operator does not terminate recirculation.
WARNING!
Excessive or prol
onged recirculation may damage red blood cells by
exposing them repeatedly to the rollers inside the pump head. Limit the
time the blood is allowed to recirculate.