Bad Hand Day III (iLimb again)

So for an on-call work day, I try to use the myoelectric iLimb.

Try.

The hand stays closed. Stays. Closed. Motors work and activate but the hand just closes. It is hard to open.

IMG_0074

The myoelectric signal seems "off".

Checking with the iPod software, the myoelectric signal *is* off!

While the electrodes for extension (red line) work well, the electrode for flexion / closing the hand (blue line) never stop activating. When relaxing the muscle they never go under the black line.

I did everything. Liner off, liner on. Electrode deconnect, reconnect. Hand off, hand on. Rub skin. And I repeated everything over again.

 

$IMG_0065

 

And they had great contact with the skin.

IMG_0070

 

So, 15 minutes into the hard work day it was supposed to master, the iLimb myoelectric arm refuses to cooperate. Yeah, sometimes it works, true.  But 2/3 of the times I try to put the arm on it does not work.

It is just that such problems are quite simply not any basis for a reliable user-prosthetic arm working relationship.

Cite this article:
Wolf Schweitzer: Technical Below Elbow Amputee Issues - Bad Hand Day III (iLimb again); published 04/05/2016, 10:24; URL: https://www.swisswuff.ch/tech/?p=5937.

BibTeX: @MISC{schweitzer_wolf_1603526386, author = {Wolf Schweitzer}, title = {{Technical Below Elbow Amputee Issues - Bad Hand Day III (iLimb again)}}, month = {May},year = {2016}, url = {https://www.swisswuff.ch/tech/?p=5937}}