Maico MB 11 BERAphone Operation Manual page 45

The following can be sources of electrical noise:
• other electrical equipment in the test room, especially devices attached to the
baby such as other monitoring equipment.
• nearby cell phones, tablets, computers, walkie-talkies.
• MRI or other radiographic equipment located in the vicinity of the nursery, even
on the floors above or below.
• RFID tracking devices especially if attached to the baby or mother holding the baby.
If the screener notices high levels of electrical artifact during testing or an increase in
REFER rates, these sources of electrical interference should be considered and
eliminated if possible. The screener may need help from the infant's nurse or physician
to troubleshoot electrical interference issues if it involves other types of monitoring
equipment attached to the baby that are critical to the child's care.
Preparing the Patient for Testing with BERAphone
5.2.2.1 Preparing the Skin for Electrodes
Optimal ABR recording requires low skin-electrode resistance (electrode impedance).
To achieve low electrode impedance, electrode gel must be massaged into to the skin in
the areas where the electrodes will make contact. You can also prepare the skin with an
alcohol pad or with a skin preparation product such as Nuprep
Figure 22
IMPORTANT NOTE: If any lotion has been applied to the baby's skin in the area of the
electrodes then this should be removed with soap and water or other electrode skin
preparation products such as Nuprep
The "ground" electrode is positioned above the ear. The vertex electrode is placed on
the forehead at the hairline, at a distance from the ground electrode of approximately
3 fingers width. The mastoid electrode is placed below the ear lobe. Depending on the
size of the baby's head, the position of the BERAphone
adjusted by rotating the disc in which the electrode is mounted.
Place a small quantity (approx. 0.1 ml to 0.2 ml) of electrode gel on the tip of a finger
and rub back and forth approximately 10 to 15 times at each of the areas described
above (rub the gel in the direction as indicated in Figure 22.).
The baby should be in a relaxed and comfortable position to minimize any potential
muscle artifact and ensure optimum test outcome in the shortest time.
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's vertex electrode can be
23/10/2019