RIGEL MEDICAL Multi-Flo Infusion Pump Analyzer User Guide
- June 12, 2024
- RIGEL MEDICAL
Table of Contents
Multi-Flo
PERFORMANCE AND
MAINTENANCE GUIDE
rigelmedical.com
Introduction
The Multi-Flo is a precision instrument that must be properly maintained in
order to achieve optimum measurement performance. The measurement principle
uses a precise volumetric measurement over a known time period to calculate
flow rates. Foreign material or air bubbles trapped within the measurement
device will influence the volumetric measurement and consequently the flow
rate measurement performance.
The volumetric measuring device must be able to rotate freely in order to
operate correctly. Using inappropriate test fluids may leave a residue in the
fluid path and impede the movement of the measurement device or ultimately
cause total seizure.
Please note that damage resulting from the use of unauthorised test fluids is
not covered by the warranty.
Test fluids
The following readily available test fluids are acceptable for use with the Multi-Flo:
- De-ionised water
- Distilled water
- De-ionised/distiller water with approximately 0.1 % Micro-90 cleaning solution
A 0.1 % Micro-90 solution is the preferred test fluid as this will prevent
growth of organic material within the fluid path and also act as a wetting
agent. This will reduce the likelihood of small air bubbles being trapped in
the fluid path which could influence the measurement accuracy. The unit
should not be drained post testing. Keeping the channels wet will prolong the
life of the instrument.
Note: Do not use saline or dextrose solution as a test fluid. IV
administration sets which may have been used with saline or dextrose solution
should not be used with the MultiFlo unless thoroughly cleaned beforehand. If
saline or dextrose solution is accidently used with the Multi-Flo, the unit
should be cleaned immediately using the process described in section 5.
Priming
The Multi-Flo must be primed to fill the internal fluid path with test fluid
and remove all air in order to provide accurate measurements. Optimum priming
can be achieved using the supplied 3 port valve supplied with the Multi-Flo
and a 60 ml syringe.
Follow the steps below to prime the Multi-Flo:
a. Ensure that the 3-port valve is in the prime position as shown in figure 1
then connect it to a Multi-Flo channel inlet.
b. Switch on the Multi-Flo.
c. Fill a clean 60 ml syringe with test fluid.
d. Ensure that all air is removed from the syringe.
e. Connect the syringe to the 3-port valve as shown in figure 1.
f. Slowly discharge the syringe into the Multi-Flo until no air bubbles appear
in the Multi-Flo drain.
g. If air bubbles are still appearing in the Multi-Flo drain when the syringe
has been fully discharged repeat steps c to f.
h. When no air bubbles are present in the Multi-Flo drain the system is ready
to make measurements.
i. Turn the 3-port valve to the position shown in figure 2.
Note: The Multi-Flo measurement device will rotate as the priming fluid is injected
Making measurements
Always use a new disposable syringe when testing a syringe pump. It is
advisable to lubricate the syringe by drawing on the plunger a few times
before loading the syringe with test fluid and installing it in the pump.
Note: Administration sets which may have been used with saline or
dextrose solution should not be used with the Multi-Flo unless thoroughly
cleaned beforehand.
After priming the Multi-Flo, as described in section 3, connect an
administration set between the device under test and the 3-port valve as shown
in figure 2.
Prime the device under test, administration set and 3-port valve with test
fluid according to the manufacturer’s instructions for the device under
test.
When there is no air in the device under test and administration set the
system is fully primed and ready to make measurements.
Turn the 3-port valve to the position shown in figure 3 to direct the flow
from the device under test to the Multi-Flo inlet. 
Note: The Multi-Flo channels should be kept primed between tests. After use, set the 3port valve to the OFF position. Before placing into storage the unit should not be drained, as keeping the channels wet will prolong the life of the instrument. The Multi-Flo inputs/outputs must also be sealed using the caps provided.
Cleaning
If the Multi-Flo is used with distilled or deionized water without Micro-90 additive, some contamination of the fluid path may occur over time. In order to maintain optimum measurement performance, the following procedure should be used to clean the Multifold:
- After prolonged storage
- After 3 months of normal use
- Immediately after accidental contamination with unauthorised test fluids
Each Multi-Flo channel should be cleaned as follows:
a. Prepare a 1% solution of Micro-90 using deionized or distilled water.
b. Fill a disposable 60 ml syringe with the cleaning solution and connect the
syringe to the Multi-Flo inlet.
c. Connect a suitable container to the Multi-Flo drain.
d. Switch on the Multi-Flo.
e. Inject the cleaning solution into the Multi-Flo channel to be cleaned.
f. Leave for approximately 10 minutes.
g. Flush the Multi-Flo channel with 100 ml of deionized or distilled water at
a rate of 200ml/hr.
h. Repeat steps 1 to 6 for each Multi-Flo channel.
Maintenance spares
Replacement priming kit: Part number 385A951
MICRO-90 Concentrated Cleaning Solution (1 litre): Part number 385A952