I'm Having Synvisc Fluid Removed From My Knee Today (and

I'm having synvisc fluid removed from my knee today (and I suppose any other fluid causing my knee to be so swollen). I seem to tolerate the injections for synvisc and have tolerated many cortisone shots over the years, but I am a wreck about having fluid removed. What does that entail and in general, is it worse than the injections mentioned as far as pain goes. Countdown 45 minutes.