I’m in Australia.. 42yr old female
Crps here is diagnosed by the Budapest criteria, there are no definitive tests.

I had a 3D bone scan and ct spect scan all results were normal.
I had an EMG 3 months post adcf which was normal, but I did have signs and symptoms of crps such as sensitivity to touch, constant burning/tingling pressure pain, swelling, stiffness and both colour and temperature changes.
12months after this I spent a week in hospital having a continuous ketamine infusion, I had another EMG this time it showed damage/denervation at the C7 nerve root.
I also had a brain scan mri which showed I had lesions on both frontal lobes but neurologist assured me they were nothing to cause concern, probably just because I suffer from chronic migraines, no other lesions were found anywhere in the spine.
I also had a lumbar punch in order to check for an autoimmune component but thankfully they were all clear.

Due to the nerve damage (which took 12months to show on EMG) I have been diagnosed with CRPS type 2 in right upper quadrant and crps type 1 in my right lower limb.

I just had an IME with the work cover dr, he made the assumption that my lower limb symptoms could be due to osteoarthritis but I have just had X-ray of hip, knee and foot and results are all clear, they confirm that there is no other reasonable explanation for my lower limb symptoms other than CRPS.

It’s been a long road, I’m almost 3 years in now, keep advocating for your wife I’m sure she appreciates your support
I wouldnt wish CRPS upon anyone, it’s horrible, I truely hope you both get to to the bottom of what’s going on

Cheers Leigh