Wow, Lou, that sounds serious. Once again, I am SO thankful we have access to good medical care.
I had a issue following shoulder surgical repair after a fall (related to seizures). I had similar, but more specific restrictions on use of my left arm, estimated recovery time included four-six months of PT. However, after a few months the Dr gave me permission to get back to things that required motion but no lifting or potential for stress (e.g. don't walk a horse using that arm on the lead rope!). It did stop me from carrying log sections to the bandsaw for processing.
Since I primarily turn small things, I didn't need to lift large wood blanks. The Dr agreed that I could get back to woodturning (and playing the piano, working the hydraulic hand controls in the dirt-moving equipment - stretching the left arm for guitar was out, as was climbing ladders, chainsawing!). Since it was my left arm recovering, my right could do all the work and the left just guide. Another more recent surgery stopped me again, but only until I was off the pain medication.
However, your surgery current instruction sound more generally restrictive, much different than mine. Forces from things like hollow forms might be a problem if turned with hand tools.
You might explain to the doctor at your visit what's involved with your wood turning. Might even use a stick and show the tool motions and effort involved. If you usually turn big stuff, maybe this would be a good time to work on spindles and smaller things! (Hey, if you're not a hard-core spindle turner should I drive up and bring my unpatented but always successful skew lesson?

If timed right I have a turning friend near Hollywood I might stop and visit on the way or way back.)
JKJ