A single shot shouldn't require a taper. I don't see what it will do to help though. So what if a massive 100mg shot of prednisone takes away your inflammation? It'll be out of your system and like it was never there by the next day.
Crohn's damage occurs over time. Taking a 1 day time-out isn't going to accomplish anything. It's like stopping someone who is hemorrhaging blood from bleeding for 5 seconds and then resuming. They're still going to bleed to death. You only gave them an extra 5 seconds of life. Whoopie.
To boot the prednisone is going to ruin your ability to heal (especially with a massive dose like that) and cause you to bleed and bruise more which means you'll be set back in your recovery time and have a greater risk of complications. Frankly I don't see a point. The benefits don't even begin to compare with the problems caused by giving you a single huge dose of prednisone right after a major surgery.
It just seems crazy to me to do major surgery on someone who is anemic and impair their ability to stop bleeding while you're at it. Prednisone makes people bruise and bleed like they're on pain blood thinners. You should see the crazy things that happen when you stick a prednisone patient and their vein blows up. I'm still trying to get the blood stains off my shoes from the last one I stuck. He wouldn't do the surgery and then give you a massive dose of heparin. He'd wait until you had healed enough so that there wasn't a risk of bleeding. So why would he give you a worthless single shot of prednisone and put you at risk for bleeding and extend your recovery time?
You're incredibly likely to need an infusion even if everything does go well. Add to that you could start bleeding post-surgery and who knows how bad the bleeding would be let alone how long it will take to stop. You're almost certainly not going to die from it since you'd be in a hospital having a CBC taken at least once a day, but I don't think causing you to be stuck in a hospital bed longer is going to do good for anyone.
You clearly do need to be on the prednisone considering you are bad enough that you're having a resection and your test results are bad. But, you need long-term therapy to protect you from further damage and frankly your doctor should be waiting until you've had a chance to heal from your surgery a little bit.
You should be headed for remicade or something to replace the prednisone too. Just plain taking you off of the drug and leaving you with nothing is only going to let the disease run rampant with nothing to even slow it down.
Bah, I wish I could slap some of these doctors around a little bit. Some of them can't muster a focused thought any better than your average hard core pot head. I think it's all the 36 hour shifts that fry their brains during residency.