18
USER MANUAL
RETEVET™ PORTABLE ERG
T +49 7461 96 580 0 | F +49 7461 96 580 90 | [email protected] | www.eickemeyer.com
5. PERFORMING AN ERG TEST
1. Remove the RETevet™ device from the docking station.
2.
Confi rm the protocol is the one desired by looking at the protocol title at the bottom of the screen. If not, select Protocol
on the device and change it to the desired protocol. See manual section
Choosing a protocol
on page 8.
3. Select
New Test
on the device.
4.
Enter patient information as prompted by the device (name or identifi er and date of birth). Pressing the barcode symbol
enables patient information to be scanned from an external display such as a PC monitor. Scanning is automatic and
does not require the joystick to be pressed. Look in the downloads section of
https://www.lkc.com/products/RETevet
™ to
download the free data entry software. If the RETevet™ device has trouble scanning the barcode, ensure the eyecup is on
or very close to the display, the display brightness is set to maximum, and the cursor is not superimposed on the barcode.
5.
Confi rm that the protocol and patient information are correct.
6. Make sure animal has dilated pupils and anesthetized corneas.
7. Place electrodes for the right eye.
A Proper placement for un-anesthetized pets and larger, anesthetized experimental animals is shown in fi gure A: active
ERG-Jet electrode on the cornea, reference electrode 1 – 2 cm from the tested lateral canthus in veterinary clinic or at
the base of the ear in research or pharmaceutical testing, and ground electrode on the top of the head or between the
shoulder blades. Place the electrodes in the following order: ground, reference, active electrode. If the ERG-Jet electrode
is used fi ll half of it just before positioning it on the cornea. An eye retractor (speculum) can be used or the eye must be
kept open by the operator. For dark-adapted tests, collect the ERGs from the right eye while the left eye is covered.
Remember
: the reference electrode must be placed on the tested side: 1 – 2 cm from the right lateral canthus or at the base
of the right ear when the right eye is tested and 1 – 2 cm from the left lateral canthus or at the base of the left ear when the
left eye is tested. Other places such as cheek or mouth can be used to place the reference electrode.
Keep it consistent
throughout all your tests.
Consider using the Mounting Arm instead of holding RETevet™ with anesthetized animal.
B Proper placement of the electrodes for small, anesthetized, experimental animals is shown in fi gure B: active jet (loop
or DTL) electrode on the cornea, reference electrode at the base of the ear on the tested side, or in the mouth and
ground electrode in the tail.
If the electrical connection is noisy, the RETevet™ device will warn you of the poor connection so that it can be
improved before proceeding. Make sure the Jet electrode is adhering to the cornea, add goniosol solution (or similar),
replace the electrode(s) or see the
Troubleshooting
section of this manual for suggestions on how to resolve the issue.
A
