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7. Maintenance > 7.5. Ultrasound protection
IEC 61161, Annex D mentions boiling as a way of making degassed water. Boiling is a feasible
method for producing small amounts of degassed water if an EasyWater Degasser is not available.
You will need the following items for making degassed water:
distilled water or water deionized by filtering
glass bottles with metallic screw caps
a kettle with a lid, large enough to hold the standing bottles
a funnel
silicon gloves
a plastic apron
safety goggles
Procedure
1.
Pour water into a kettle and boil heavily under a lid for 20 minutes. The amount of water should
be sufficient for both filling and covering the glass bottles.
2.
Protect yourself with a plastic apron, safety goggles and silicon gloves.
3.
Pour the hot water into the glass bottles through a funnel. Leave a little air in the neck of the
bottles.
4.
Bring the remaining water into boil again and place the filled bottles in it without the caps. Boil
under a lid for 15 minutes.
5.
Carefully lift the bottles from the boiling water and immediately screw the caps on.
6.
Let the bottles cool down for a few hours, then refrigerate.
7.
If an oxygen meter is available, measure the oxygen level to verify that the oxygen content is
below 4 ppm.
NOTICE
To avoid creating air bubbles, never shake the water.
Degassed ultrasound gel – water mixture
Also a mixture of degassed water and ultrasound gel can be used as a coupling medium. Prepare
the mixture by mixing ten parts of degassed water and one part of ultrasound gel. The consistency
of the mixture is correct when any air bubbles will rise to its surface.
7.5. Ultrasound protection
When you practice positioning with volunteers or animals, use an absorption pad or a large
positioning pad on top of the ultrasound window to ensure that ultrasound energy cannot reach
them.
To position the protectively used absorption pad or a positioning pad:
1.
Place the absorption pad or a large positioning pad on top of the ultrasound window membrane,
in the same way as you would place a gel pad.
2.
Place a thin positioning pad, thick towel or cloth on top of the absorption pad or the positioning
pad to prevent skin contact. The pads can become hot when exposed to ultrasound.
Instructions for Use
109745C2 / 02-2022
149 (192)
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