Saw the doc this past Friday and was given the go ahead to up the training (but not the weight). Sooo...Yesterday I did 21 sets of back, 12 sets of biceps and 10 sets of forearms.
Will rest today and train tomorrow. I am trying hard to lose my perma-bulker look (think early Draper but not as massive!) and that will take time. I feel pretty good today but then I am listening to the beautiful and talented Diana Krall... 
I'm curious, does your doctor work out? A doctor I saw years ago, told me when I was nearing 40 years old that I should give up weight training because I was getting too old for it and do something healthier like running or bicycling. I already bicycled a lot and ran occasionally. That doctor retired and eventually died of heart failure, unfortunately. I took his advice with a grain of salt.
Remember, it is called the practice of medicine, not all doctors have all the knowledge they should to offer sound advice regarding weight training. If you are recovering from an injury or a health issue, your best bet is to simply pay attention to what your body tells you. Whatever you do, do it moderately at first to see how that works out and advance when you and not your doctor thinks you are ready. If you really need advice, talk to a physical therapist or talk with a trainer.