Rx Only
4 of 36
4260-MAN-000-V
EN
INSTRUCTIONS FOR USE:
1.
Prepare the Checkpoint for use
Remove the sterile pouch from the package.
Inspect sterile pouch for any damage.
Do NOT use if sterile pouch or product appears damaged.
Remove product from sterile pouch.
Remove protective sleeve from probe.
Remove tape from return electrode cable.
Remove cover from the needle return electrode.
Do NOT turn on until ready to use. Once turned ON, the device
will not turn OFF and will remain operational for
approximately seven (7) hours.
2.
Place the needle return electrode in subcutaneous tissue:
In the sterile field but away from the area to be stimulated. If
stimulation occurs at the needle site, move the needle.
Do NOT cross midline of the body.
Do NOT place in muscle or near other excitable tissue.
The needle return electrode may cause stimulation. Place the
needle return electrode in an area away from excitable tissue
and away from the stimulation area to avoid confusion.
3.
Prepare to deliver stimulation
Probe
Nose Cone
Pulse Duration
Slider
Stimulus Amplitude
Switch
↓
↓
↓
↓
NOTE: The Stimulator must be turned ON BEFORE
the probe makes contact with tissue.
Turn ON the Checkpoint by moving the stimulus amplitude
switch from 0 to 0.5mA.
The visual indicator will turn YELLOW, indicating that the
Stimulator is ON but not generating a stimulus output
(because pulse duration is still set to 0 μs).
Increasing amplitude or pulse duration increases the strength
of stimulation.
Amplitude switch provides low and high settings.
o
Low amplitude (0.5 & 2 mA) used for direct nerve
stimulation. High amplitude (20 mA) used to obtain
muscle contraction and should not be used for direct
nerve stimulation.
If a nerve is thought to be in close proximity and no
response is obtained at the low amplitude settings, the
surgeon may increase the amplitude to 20mA and gradually
increase the pulse width. In this case, the high amplitude
permits the surgeon to stimulate a nerve that may be encased
in scar tissue and thus not responsive to low amplitudes.
Pulse duration slider is used to gradually increase strength at
each of the amplitude settings.
The stimulator delivers a continuous train of stimulation,
which will result in a sustained response as long as the
stimulus is applied.
4.
Deliver stimulation
Place probe in contact with tissue.
Adjust the pulse duration slider gradually to increase the
level of stimulation. The visual indicator will FLASH
YELLOW indicating that stimulation is being delivered.
NOTE: If a questionable response to stimulation is obtained
from exposed motor nerves or muscle tissue under test, move
the probe to a known nerve or muscle and observe the results to
confirm that the Stimulator is operating correctly. Check
connections, check controls, and move around the area. Verify
that any paralytic agents used are no longer in effect.
