27
Hygea 2850VM
good practice
The need to degas:
In order to allow optimum ultrasonic activity, the gases present
in ordinary tap water need to be driven out of the cleaning solution.
The time needed to degas the liquid varies depending on the amount of gas present in
the liquid and the quantity of water in the tank. Ultrawave recommends a degas period
of at least 10 minutes.
During the degas cycle, you will see bubbles of gas forming on the inside of the bath,
and slowly rising to the surface. Degassing is complete when you can no longer see
these bubbles.
Another indication of increased “cold
-
boiling” at the liquid surface indicates that the
liquid is degassed.
Once the liquid is degassed, the bath is immediately useable and will run the cleaning
cycle.
The effect of heat:
Heating the liquid in the bath will aid the cleaning process.
Normally a temperature of between 30 to 60°C is sufficient to accelerate the process.
However, when cleaning medical instruments, the
maximum temperature should
be set to 40°C
. Setting the Max above 40°C may cause proteins to coagulate and
“bake on” to the instruments.
Ultrasonic activity itself will heat up the liquid at a rate of approximately 10-15°C per
hour if in continuous use.
Baskets and Instrument Cassettes:
Instruments should be placed in a
Hygea
2850VM
basket and/or instrument cassettes.
Detergents:
Ultrasonic baths require the presence of a cleaning detergent to work
effectively. Ultrawave recommends
Sonozyme
or
Ultraclean M2
for use with the
Hygea 2850VM
.
Cleaning time:
The
Hygea 2850VM
cycle time is preset to 10 minutes. This can be
changed by the machine administrator. Independent tests have shown that a cycle of
this length is sufficient to clean heavily contaminated instruments.
If the instruments are not clean at the end of a cycle, then repeat the cleaning cycle,
or increase the cycle time as explained on page 14 of the
Administrator Instruction
Manual
.
Rinsing:
After the instruments are removed from the
Hygea 2850VM
they should be
rinsed with clean running water prior to the next stage in the decontamination process.
Rinsing the instruments ensures that any contaminants present in the water at the end
of the cycle do not re-adhere to the instruments when the baskets are removed from
the
Hygea 2850VM
.
Portable Appliance Testing should be conducted with water in the bath.
Summary of Contents for Hygea 2850VM
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