NeuroMetrix DPNCheck 2.0 NC-040 User manual

• Device Use
• Testing Protocol
• Test Results
• Troubleshooting
Reference Guide
(Model: NC-040)
LED Error Message Help Screen
4B Gill Street, Woburn, MA 01801
[phone] www.dpncheck.com © 2022 NeuroMetrix, Inc. All Rights Reserved. PN2205778 Rev. B
Always remember to perform the test away from electrical equipment that may cause interference.
If you continue to experience issues, please call Customer Service at [phone].
Troubleshooting
LED Error Message Help Screen

Device Use
Step 1:
Position the patient so that the
outer ankle and calf can be
easily accessed then vigorously
scrub the testing area with the
prep pad.
Step 8:
Align the device on the lower calf by pushing
down firmly on the foam. The arrow closest to the
midline of the calf should point to the back of the
knee. When the arrow is pointing properly, the
inner edge of the biosensor will then sit adjacent
to the midline (Achilles tendon). Ensure that the
entire biosensor and both probes are making full
contact with the patient’s skin.
Step 9:
Press the button to start the test. The display
will show “Testing”. During the test the LED
blinks green when each stimulus is delivered.
Maintain firm pressure on both the biosensor
and the probes throughout the test. Test
times may vary per patient but normally lasts
for 10-15 seconds.
Tip: During test, maintain:
a.) Firm pressure on probes
b.) Firm pressure on biosensor
c.) Steady positioning
Step 6:
Remove the backing from the
biosensor.
Step 2:
Power on the device by pressing
the power button. The display
will prompt the user to Connect
Biosensor.
Step 5:
Apply a small amount of
conductive gel to each probe.
The head of the probe should
be covered with gel.
Tip: Remove excess gel that may
lead to gel smearing between the
two probes.
Step 4:
Select the leg to be tested
on the touch screen. Once
selected, “Ready to Test: will be
displayed followed by the limb
that was selected. The back
arrow allows you to return to
the previous screen if needed.
Step 3:
Fully insert the biosensor into the
port. Align the biosensor to the
foam. The display will prompt user
to select limb.
Tip: Align the biosensor with the foam on
all sides; “REMOVE” label side faces up.
Step 10:
Once results are displayed the test is complete
and the device may be removed from the leg.
Testing Protocol
1. Testing a single leg is usually clinically sufficient.
2. The test will provide a nerve conduction result the first time in most patients.
3. If the first test does not provide a result or to confirm the result, the test on the same limb should
be repeated. Please see Appendix F for likely reasons if a test error occurs.
Tip: In certain circumstances it may be beneficial to confirm the results. Examples include:
- Confirm CV if amplitude is ≤ 4 µV
- Confirm undetectable response
- Confirm result inconsistent with clinical findings
- If the leg setting on the device was incorrect, then the test should be repeated
4. If the repeat test does not provide a result or for further confirmation of the results, the opposite
leg should be tested.
• The same biosensor may be used on both legs.
This protocol is intended only as a guide. It is the responsibility of the provider to determine the clinical necessity of nerve
conduction testing.
Step 7:
Locate the patient’s outer ankle bone and Achilles tendon.
The long probe should be placed behind the ankle bone,
half way between the bone and the Achilles tendon.
Tip: The anode (short probe) and cathode (long probe) should be
aligned to the outer ankle bone. The cathode should be adjacent to
the middle (central prominence) of the ankle bone.
The probes should be placed behind but not over the outer ankle bone.
Test Results
Whenthe test is complete, the device will display the
sural nerve conduction amplitude (Amp) in microvolts
(µV) and the conduction velocity (CV) in meters per
second (m/s).
In cases where the patient has low amplitude (between
0-4 µV) and the CV cannot reliably be reported, only
the amplitude will display on the device. The amplitude
alone may be used to interpret results.
Tip: Both the outer ankle bone (lateral malleolus) and Achilles
tendon should be easily accessible as shown at left. Please
reference the User Manual for alternative patient positions.
The test area should be vigorously scrubbed with the
Preparation Pad provided.
••