finger joint fusion: how test BGs, how inject ?

I have to have the joints in my fingers (and thumbs) taken out due to severe erosive arthritis (per my rheumie, is eating away bone faster than any she's seen; she does not know what type this is)
I test almost twenty times day/night (with alarms set during night) , due to hypo unawareness and other medical conditions which make BGs unpredictable.
With no joints in my fingers, does anyone know HOW I am supposed to test (picking up tiny test strips, inserting into meter), milk fingers for blood? And how do I inject?
I have asked for help from my drs' offices (rheumie's office, surgeon's offices that have therapists, and diabetes educators) and they cannot tell me how I am supposed to do these things without joints (there is no one in household who could do it for me)
Has anyone had their joints fused? (I think the proper term is arthrodesis). How do you do these things? And can you clue me in on how to do other activities that will be impacted? (like dressing, cooking, etc)
I cannot schedule the surgery until I find a way to do the testing and injecting, since that is essential for me to exist. However, the longer I wait for surgery, the more bone is destroyed, and the surgeon has less bone to work with, and thus a less favorable outcome. Thanks, Les PS: Apparently joint replacement is not an option with finger joints because they so often fail.

Thank you all for your replies!
Copepod, you are right , I am not in the UK, I am in the US. I have been to several occup'l therapists, and also hand therapists (you would think that they could think creatively? Think outside the box? And certainly that they have had diabetics, who test and inject , as their patients, right ? Apparently not - or perhaps all these patients had people to do it for them? Which, when my joints are permanently fused, I will not be able to do, as I understand the surgeons to tell me)
Bob, I can't use my teeth, they also are a mess (they do not meet to bite and chew, the jaws are out of alignment (I have two complete rounds of braces, teeth out, palate expanded, etc, as TMJ treatment- still not fixed, after twenty yrs of treatment ( I am approaching 60) = so my teeth can't meet to grip something (and the jaw joints hurt like heck with any pressure ; I am a favorite customer of Gerber baby food)
I asked the therapist to teach me how to use my feet or toes, if that would help me cope without my fingers and use of hands; they looked at me like I was nuts (maybe that is because my neck is in a brace all the time, back also is a wreck, due to bones being misaligned and not staying in place- perhaps due to this yet-to-be-diagnosed type of arthritis or rheumatic disorder?) However, I WOULD learn to do it, if they would teach me, or just HELP me think outside the box for solutions to things that I have to do, esp to remain living independently.
I have used velcro on my fingertips to pick things up, but unfortunately, the other hand/fingers have to be used to take whatever object you picked up, OFF of the velcro, right? (both my right and left hands and fingers are affected)
I have used pliers to add in gripping things (altho my grip strength is not good, and my fingers have trouble bending to hold the pliers - or to open kitchen drawers, etc (but perhaps I could 'install' someting with a loop thru the drawer handle, to pull it open? However,for dextrous tasks like testing, I don't think this would work?)
My insurance does not cover any of the strips made in a cassette with a wheel. I have the OneTouch Ultra, where the individual little test strips come lumped together in something like a film cannister.
Thank you for the tip on the model makers vice; I have been planning to go to a craft store, to see if there were small tools like this (perhaps this would be found in a craft store?)
I think part of my problem is that I have tested and injected for so many years, that I myself cannot think creatively as to how to do it otherwise (esp during the night when one is half asleep, or when one has low blood sugar and a bit fuzzy headed)
Thank you for your good wishes on my operation, it will be the first in a series of operations. (I have never had surgery before, except wisdom teeth - unbelieveable,right?) I am also allergic to many surgical materials and implants, amd some types of stitches, so this will be 'interesting', Les