abduction little finger 1
abduction thumb 1
intrinsic fingers 1
abduction little finger 2
abduction thumb 2
intrinsic fingers 2
abduction index finger 1
opposition thumb 1
abduction index finger 2
opposition thumb 2

Rotterdam Intrinsic Hand Myometer (RIHM)

Check this link for videos in YouTube

Problem shooting

1.When the RIHM is not working, there is a possibility that the battery is down.
>>> click here for more information

2. Please note that the angle in which you hold the RIHM is in a straight line in such a way that the small black linkage-join does not touch. It might also help to hold the black handle in the lowest position possible. If you hold the handle too high it might tilt which creates an angle in the black linkage-join between the RIHM and the sensor. We have found that this might cause too high or too low output of the force measured.


RIHMcalibration1With this function you calibrate the RIHM. -CALIB- -PRESS >-
Press (S3) to continue -0 N- -PRESS >-
Make sure no force is applied to the RIHM and press (S3).
With this the zero point is determined.
Now apply a weight of 10 KG to the RIHM and press (S3). If you receive the message:
-CALIB OK- -XXX/YYY- then the calibration has been successful (-XXX- stands for maximum -YYY- for minimum) .If you receive the message -CALIB- -ERROR- the calibration has failed and the calibration must be carried out again.

Example how you can calibrate the RIHM – We advice to use a 2, 5 and 10 kg weight
2 kg = 19.6133 N
(please register (keep a log) and report to us your findings)

rihm_normal_values• Manuals, forms and instructions  >>> RIHM_manual

• Normal values:

• Check this >link< for videos in YouTube

• Technical Manual   >>> Technical_Manual_RIHM

Manufacturers and distributor for the RIHM is the company med.engineers
Their website:  www.med-engineers.com
E-mail: info@med-engineers.com

Dynamometry of intrinsic hand muscles in patients with Charcot–Marie–Tooth disease. R.W. Selles, B.T.J. van Ginneken, T.A.R. Schreuders, W.G.M. Janssen, H.J. Stam. NEUROLOGY 2006;67:2022–2027

Strength measurements of the intrinsic hand muscles: a review of the development and evaluation of the Rotterdam intrinsic hand myometer.  Schreuders TAR, Selles RW, Roebroeck ME, Stam HJ. Journal of Hand Therapy. 2006 Oct-Dec;19(4):393-401

Outcome of muscle strength in patients with ulnar and median nerve injury: Comparing manual muscle strength testing, grip and pinch strength dynamometers and a new intrinsic muscle strength dynamometer. Schreuders TAR, Roebroeck ME, Jaquet J-B, Hovius SER, Stam HJ.  Journal of  Rehabilitation Medicine 2004.

Measuring the Strength of the Intrinsic Muscles of the Hand in Patients with Ulnar and Median Nerve Injury; Reliability of the Rotterdam Intrinsic Hand Myometer (RIHM) Schreuders TAR, Roebroeck ME, Jaquet J-B, Hovius SER, Stam HJ. Journal of  Hand Surgery (Am) 2003.

Strength of the intrinsic muscles of the hand measured with a hand-held dynamometer: reliability in patients with ulnar and median nerve paralysis. Schreuders TAR Roebroeck M, van der Kar TJ, Soeters JN, Hovius SER, Stam HJ. Journal of Hand Surgery [Br]. 2000 Dec;25(6):560-5.

Strength measurements of the lumbrical muscles. Schreuders TAR, Stam HJ. Journal of Hand Therapy 1996;9(4):303-5.