ICU Rounds was a great podcast. It's a burn surgeon who used to be at Vandy. It stopped probably 5 years ago, and some of it is out of date, but most of it is still relevant. Has some surgery specific stuff.
I'm not a surgeon, but if you're interested in critical care, EM:crit is pretty good, but isn't as cutting edge as it used to be. Maryland CC Project is very good - it's an ICU podcast that is done by surgeons occasionally.
If you looked through those three, you could probably pick up quite a bit of knowledge about managing surgical patients. Mind you, none of it is about operative care/surgical technique.