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Category: Sewing

Bimanual tasks - stitching bag tag holder back into place [Northface bag; task evaluation; benchmark]

Cite this article:
Wolf Schweitzer: Technical Below Elbow Amputee Issues - Bimanual tasks - stitching bag tag holder back into place [Northface bag; task evaluation; benchmark]; published April 26, 2014, 22:39; URL: https://www.swisswuff.ch/tech/?p=2953.

BibTeX: @MISC{schweitzer_wolf_1569118230, author = {Wolf Schweitzer}, title = {{Technical Below Elbow Amputee Issues - Bimanual tasks - stitching bag tag holder back into place [Northface bag; task evaluation; benchmark]}}, month = {April},year = {2014}, url = {https://www.swisswuff.ch/tech/?p=2953}}


 

To separate Real Men from Quiche Eaters, a range of observations can be useful howevermuch one needs to know them before being able to apply them.  In the context of prosthetic arms, quite obviously, the ability to discriminate shit from shinola does not grow on trees either.

If you are now even the mildest bit offended by me using clear language, bear in mind that no self respecting quiche eating "bionic" aficionado ever avoids to equate prosthetic hooks with "arcane" technology or fairytale figures such as Captain Hook. And as long as we all accept that the first stone has been cast, and that (if you are part of that group) you might be part of a problem (rather than a solution), we are all super cool, particularly when now we are going to call the cards.

Real tests do grow on trees, actually, in the real world. Already so far, it should have become sky clear to you that wearing a prosthetic arm to do lesser acts than storing a sofa on the attic is mostly (but not quite) pansy boy (not girly!) territory. If your prosthetic arm does not fully assist in solving these bimanual tasks, revise its concept before it is too late. Because if anything, real life does not change because of you suggesting amputees wear 3 kg material that cannot even open a bag of pop corn. I write this because I know that that was what you were (secretly) hoping.

So here is the task.

The tag holder of my Northface bag came off due to travel and strain.

The damage can be seen in the following picture. The other side of the tag holder had come undone more extensively.

WP_20140421_13_13_52_Pro (2)

Here is me stitching it back on.

For that, I use a thick strong needle and thick strong black string.

In order to push the needle through the dense fabric of the bag, lots of force must be applied to the needle, and to make sure the (gray, see following image) plastic of the tag holder stays in place, the prosthetic hook is used to exert precise ultra hard counter pressure. This works extremely well. I tried sewing with the Becker hand - that works. But sewing with the i-Limb was a disaster. The fingers are too weak, cannot reliably grip, definitely do not push hard enough and the controls are not useful when using the elbow and forearm muscles of the stump to actually push hard with the prosthetic device.

WP_20140421_13_13_15_Pro

 

Here is a view on the needle penetrating bag and tag holder:

WP_20140421_13_11_34_Pro

In order to allow for needle maneuvering from outside to the inside, the inside lid bag inset - the gray net that you see - must be kept away from the needle. So, doing that with the hook is extremely fast and effective as the hook's grip and precision as well as its immediate speed make for a fast progress.

WP_20140421_13_10_36_Pro

Do not get me wrong here. It is nice and sweet to see fluffy ideas of what a prosthetic hand should do in the imagination of some academics. But it is immensely nicer and sweeter to actually have and be able to use a prosthetic that allows me, here and there and now, to really solve hard bi-manual tasks no researcher, in all years of prosthetic hand research, has EVER thought of, but that I anticipated when we were putting together my prosthetic arm. Not even 15 minutes later after I had started was my bag stitched up and fixed and ready to fly.

Remember. Real men stitch stuff up and get it ready in no time.

[Bimanual task benchmark activities]

iLimb Ultra Revolution - "precision" grip [facts and fiction of "bionic" hands, compared to body powered Becker hand or hook]

Cite this article:
Wolf Schweitzer: Technical Below Elbow Amputee Issues - iLimb Ultra Revolution - "precision" grip [facts and fiction of "bionic" hands, compared to body powered Becker hand or hook]; published March 29, 2014, 16:50; URL: https://www.swisswuff.ch/tech/?p=2906.

BibTeX: @MISC{schweitzer_wolf_1569118230, author = {Wolf Schweitzer}, title = {{Technical Below Elbow Amputee Issues - iLimb Ultra Revolution - "precision" grip [facts and fiction of "bionic" hands, compared to body powered Becker hand or hook]}}, month = {March},year = {2014}, url = {https://www.swisswuff.ch/tech/?p=2906}}


It appears that people are hyped up about the "bionic" hands. And, true, they hold an immense promise.

So obviously I try to fix my jacket, sew some buttons on. Here is how that went.

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Fixing / sewing up boot latch [tech]

Cite this article:
Wolf Schweitzer: Technical Below Elbow Amputee Issues - Fixing / sewing up boot latch [tech]; published November 21, 2011, 04:42; URL: https://www.swisswuff.ch/tech/?p=510.

BibTeX: @MISC{schweitzer_wolf_1569118230, author = {Wolf Schweitzer}, title = {{Technical Below Elbow Amputee Issues - Fixing / sewing up boot latch [tech]}}, month = {November},year = {2011}, url = {https://www.swisswuff.ch/tech/?p=510}}


I am able to tie shoe laces but since over ten years and for reasons of comfort and style, for economic reasons as well (these last rather long) I prefer boots over other shoes for everyday wear and tear.

A new pair that I got myself recently to replace a pair of boots that was worn out to the point of falling apart quite literally instantly got me into trouble - the latch on the back of the new right boot tore off. The fabric of the latch itself was fine - it appeared to be a problem of the seam that had come loose.

I had taken that boot to the local shoemaker for repair but it turned out that the cheap glue that dude was applying didn't do the trick after all. So between shipping the boot to the manufacturer for any inadequate amount of money and considering a discussion about glue with the shoemaker I decided to give a direct in-house repair some closer consideration.

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Stump warmers - sewing tubes [product info]

Cite this article:
Wolf Schweitzer: Technical Below Elbow Amputee Issues - Stump warmers - sewing tubes [product info]; published October 9, 2011, 11:09; URL: https://www.swisswuff.ch/tech/?p=491.

BibTeX: @MISC{schweitzer_wolf_1569118230, author = {Wolf Schweitzer}, title = {{Technical Below Elbow Amputee Issues - Stump warmers - sewing tubes [product info]}}, month = {October},year = {2011}, url = {https://www.swisswuff.ch/tech/?p=491}}


1 Comment

My god child and her family have one toy that is a tube knitting machine. It is made from plastic and as that it is prone to break. In fact, one part broke but her mother succeeded replacing it herself even though it was rather hard to get that done. But all in all most of us are rather crafty ; )

To keep my blue cold freezing under-circulated stump warm, as that reduces stump pain and phantom pain, a tube knitting option isn't necessarily bad to have so I figured y'all might want to have a look.

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Sewing - thread manipulation

Cite this article:
Wolf Schweitzer: Technical Below Elbow Amputee Issues - Sewing - thread manipulation; published December 27, 2009, 04:31; URL: https://www.swisswuff.ch/tech/?p=252.

BibTeX: @MISC{schweitzer_wolf_1569118230, author = {Wolf Schweitzer}, title = {{Technical Below Elbow Amputee Issues - Sewing - thread manipulation}}, month = {December},year = {2009}, url = {https://www.swisswuff.ch/tech/?p=252}}


Grabbing thread. Comparing Otto Bock MovoHook 2Grip (cost: around 1200 USD) and Becker Lock Grip hand (cost: around 600 USD). Maybe the very functional design of hooks implies high functionality - but whether there really is functionality should be tested carefully.

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Comprehensive inventory of ADL - Activities of Daily Living - using Becker Lock Grip hand and Otto Bock MovoHook 2Grip as right below elbow amputee

Cite this article:
Wolf Schweitzer: Technical Below Elbow Amputee Issues - Comprehensive inventory of ADL - Activities of Daily Living - using Becker Lock Grip hand and Otto Bock MovoHook 2Grip as right below elbow amputee; published November 13, 2009, 02:12; URL: https://www.swisswuff.ch/tech/?p=232.

BibTeX: @MISC{schweitzer_wolf_1569118230, author = {Wolf Schweitzer}, title = {{Technical Below Elbow Amputee Issues - Comprehensive inventory of ADL - Activities of Daily Living - using Becker Lock Grip hand and Otto Bock MovoHook 2Grip as right below elbow amputee}}, month = {November},year = {2009}, url = {https://www.swisswuff.ch/tech/?p=232}}


ADL (activities of daily living) are a roundabout way measure by which rehabilitation outcomes are measured. They contain household activities or housework, everyday activities, work and play, eating and laundry, cleaning and fixing up stuff. And, what is good enough for rehab outcomes sure is good enough for me. So I figured why put up with blurred concepts when we can be far more concise?

[this is comprehensive, it really is - this time there are lots - and I mean *lots* - of images - puhleeze, wait until they are loaded, get a drink, go to the bathroom, whatever, *then* read]

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