HD453 GB Issue 08
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11.14 Allow the unit to warm to working temperature and stabilise before administration of oxygen.
11.15 Only once the unit is prepared, the alarms tested and the unit is warmed and stable at operating
temperature may the oxygen supply be connected.
Use an approved and serviced medical flow meter and pressure regulator. In-line humidifier
devices are available to increase the humidity of the oxygen before it is added to the air in the
intensive care unit. Check with your medical oxygen supplier for more details. Set the regulator
according to the instructions supplied with the flow meter.
11.16 Adjust the flow rate to 1 lpm (litre per minute) which provides approximately 40 - 45% oxygen
concentration.
Long term concentrations higher than this may cause permanent injury or death of the patient.
Lower concentrations will reduce the effectiveness of treatment.
For higher concentrations it is recommended to place a mask directly on the animal. In either case
do not exceed 1 lpm.
Monitor frequently for correct pressure and flow rate of oxygen and for correct incubation
temperature. Frequently check the vent is not obstructed.
11.17 Under normal conditions the maximum sound level in the unit is 55dBA. Note that administration of
oxygen may increase the noise level for the animal in the unit.
11.18 CO
2
concentration will not exceed 0.4% under steady state conditions.
11.19 When oxygen administration is finished switch off the flow of oxygen. Oxygen may remain in
animal hair / fur and in blankets for some time (30 minutes or more). Leave the unit running with
the animal inside for sufficient time for the oxygen to disperse.
If the alarm sounds during use disconnect the oxygen supply, disconnect power and open the
door to ventilate the care unit. Do not re-use until the fault has been investigated and rectified.
Never ignore or attempt to bypass the alarm system, this may result in a serious hazard.
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Nebuliser
12.1 The nebuliser solution holder may be connected to a nebuliser pump for administering treatments
directly to the animal chamber.
12.2 Do not use a nebuliser pump at the same time as oxygen administration. This is to prevent oxygen
flowing back into the air pump if a fault developed.