Biothesiometer is a simple tool used for managing the peripheral neuropathy and diabetic neuropathy due to loss of vibration perception threshold (VPT). Biothesiometry Study helps to prevent diabetic foot ulcers. For more details visit www.digitalbiothesiometer.com.

1. Digital Biothesiometer
Vibrometer
◼ Electronic Tuning Fork
◼ Tool to Quantify
◼ Vibration output in Voltage format
◼ 0 to 50 Voltage variable vibration output
◼ Voltages are internationally accepted
◼ Usually vibration output units are micron
but not used as an indicator

2. Feature contd..
◼ Check key to confirm reading
◼ Computer connection thorough USB cable
◼ Windows based computer supports
◼ Data transfer to Computer
◼ Works in 200 ~ 230 Volts supply

3. Sample Report

4. Sample Report – Model 2
Developed for Denmark

5. Kit Content:
◼ Biothesiometer model VIBROMETER
◼ Vibration Probe
◼ Power Cord
◼ User Manual
◼ Padded Carry Bag
◼ Additional Fuse – 100mA Slow Blow(2 Nos.)

6. Interpretation of Result
◼ 15 Volts and less is considered Normal
◼ 16-20Volts – Mild, 21-25Volts – Moderate and
>25Volts – Severe loss of vibration perception
◼ > 25Volts are considered high risk foot
◼ Scientific papers suggest 25volts and beyond are
7 times more vulnerable to get ulcer than a
normal foot.
◼ They also warn that they are 23 times more
vulnerable when the voltage is more than 42.

7. Vibrometer

8. Controls
Mains socket on the back panel
connects the power cord to the
machine. A Fuse Holder is inbuilt.
ON / OFF switch on the top
switches on the electrical power to
the machine. When on it glows in
RED colour.

9. Digital display readout indicates the
vibration output in Volts. 0 to 50
Volts are displayed.
5 Pin connector connects the vibration
probe to the machine. Insert the
probe and tighten the screw gently.

10. Patient is asked to respond when they
feel the vibration. To reconfirm their
response, CHECK key is used. When
pressed, this will stop the vibration at
the probe.
Patient should respond correctly and if
they fail, then the reading is not
correct.
For convenience CHECK is also
present in the probe.

11. Volt rotary knob is used to
increase or decrease the
vibration strength. Clockwise
rotation will increase the volt
and vice versa.
It is recommended to keep this
knob at 0 volts before
switching on the machine

12. The probe tip or the plunger is the
point of contact with the patient.
This tip should be placed on the object
gently.
Probe should not be pressed hard on
the subject under test.
Depending upon the strength of
voltage selected this tip vibrates.

13. How to Change the Fuse
◼ Use a small screw driver
◼ Keep the driver on a slot
appear in the mains socket.
◼ You may also see a fuse
symbol on top of the carrier.
◼ Push the screw driver outside
gently.
◼ The fuse holder will get
pushed out.

14. ◼ Once the fuse holder is out,
you may see 2 glass fuses.
◼ Fuse on the outside touched
by the driver is the working
fuse.
◼ Replace this fuse with the
fuse kept on the outer side.
◼ Dispose the defective fuse

15. ◼ Push the fuse holder till it gets fixed with
the mains socket.
◼ The value of the fuse used is 100mA Slow
Blow, 20mm length and 5 mm Dia.
◼ Do not use fuse over or under rated than
this value to avoid damage to the machine.

16. Points to be noted before starting
the test procedure
◼ Room temperature to be maintained between
25oC and 30oC
◼ Patient should be in supine position on a
comfortable couch
◼ Patient should not talk while doing the test and
they should also not to see the testing procedure
◼ Explain the patient about the testing procedure
and its use before start doing the test.

17. Operation Procedure
◼ Connect the mains chord to the machine and
the wall electric power socket.
◼ Keep the Voltage knob at 0 position, means
fully counterclockwise position.
◼ Turn on the ON/OFF switch
◼ dFCI is displayed in the readout for few
seconds.
◼ “00” will be displayed.

18. ◼ Increase the voltage knob slowly in the
clockwise direction till the vibration voltage
shows 10.
◼ Feel the vibration at the tip of the vibration
probe.
◼ Gently touch few boney points in the wrist or
hands of the patient.
◼ Make them aware about the difference between
touch and vibration sensation

19. ◼ Inform them that you will be doing the similar
test in the foot.
◼ Reduce the vibration voltage to “00”
◼ Gently touch the probe tip on the place of
interest in the foot.
◼ Slowly increase the voltage using the knob
◼ Inform the patient to respond loudly when they
started feeling the vibration when you increasing
the voltage.

20. ◼ Press the CHECK key in the probe to confirm
whether the patient feels it.
◼ Pressing CHECK stops the vibration.
◼ When the key is pressed the vibration at the tip
is stopped and the patient should respond by
saying NO.
◼ When you release key the patient will feel the
vibration and they should respond by saying
YES.

21. ◼ If they say YES when the key is pressed, either
they have not understood the test or fooling us.
◼ Educate the patient again and repeat the test
procedure.
◼ After completing the test reduce the voltage to
“00” by turning the knob.
◼ Switch of the machine and keep the vibration
probe safely.
◼ This completes one complete test procedure.

22. Maintenance
◼ Place the equipment free from dust and
moisture.
◼ Give at least 15 min rest for every alternate
hour, when the equipment is used continuously.
◼ Use a servo voltage stabilizer (230V/50Hz)
against frequent power fluctuations.
◼ When using with an inverter, please make sure
the inverter is a sine wave inverter.

23. Cleaning
◼ Do not soak or drop the unit or probe in liquids.
◼ Do not use solvent cleaners.
◼ Use only alcohol swap or moistened cloth for
cleaning purpose.
◼ Do not autoclave the unit and its accessories.

24. Warning
◼ Recommended not to keep the Vibrometer
probe in the infected foot to avoid
contaminations with others.
◼ Instruct the patient to wash their foot before
subjected to the test.
◼ Do not drop or mishandle the equipment and its
accessories
◼ Read the User’s instruction Manual before use.

25. ◼ Do not allow patients to operate any part of the
equipment.
◼ Do not use the damaged or malfunctioning
equipment.
◼ Unauthorized service must be avoided.
◼ Place the equipment in secure surface such that
it does not roll, fall or collide with a user or
patients.

26. Error Messages
◼ nOP: When the machine is turned ON without
connecting the probe, this error message
indicating “probe is not connected”.
◼ Switch off the machine and connect the probe
before turning it on again.
◼ When the vibration voltage increased beyond
40V, buzzer will alert with flashing of the
reading, just to indicate to the user that we are at
the maximum voltage.

27. Clinical Reference
◼ Vibrotactile threshold measurement for detecting
peripheral neuropathy: defining variability and normal
range for clinical and research use; J.Duke, M.McEvoy,
D.Sibbritt, M.Guest, W.Smith, J.Attia;
Diabetologia(2007) 50:2305 – 2312.
◼ Vibration perception threshold; are multiple sites of
testing superior to single testing on diabetic foot
examination? Amstrong DG, Hussain SK,Middleton J,
Peters EJ, Wunderlich RP, Lavery LA; Ostomy Wound
Manage, 1998 May 44(5):70-4, 76

28. ◼ Comparison between Monofilament, Tuning
Fork and Vibration Perception Tests for
screening patients at risk of foot complication;
H.Gin, V.Rigalleau, L.Baillet, C.Rabemanantsoa;
Diabetes Metab(Paris) 2002, 28, 457- 461.
◼ The Neuropathy of Erectile Dysfunction, CB.
Bluestein, JC Arezzo, H.Eckholdt and
A.Melman, International Journal of Impotence
Research(2002) 14, 433 – 439.

29. ◼ Prediction of diabetic neuropathic foot
ulceration using vibratory perception thresholds;
Young MJ, Breddy L, Veves A, Boultan AJM;
Diabetes Care 1994; 17; 557-560
◼ Vibration Perception Threshold and the law of
mobility in diabetes mellitus patients,
M.Manivannan, R.Periyasamy,
V.B.Narayanamurthy; Primary Care Diabetes 2
(2009) 17-21.

30. END