I carry the Eichorn-Solingen Pocket Rescue Tool II with the spear blade. Why not the rounded blade? I have shears for cutting around the pt, as others have mentioned. You have to think how you're going to justify accidentally cutting a pt... I have used my knife around a pt twice; once, when fire was using my shears at a multiple pt MVC, and the second was when I had to shave the hair off of a pt to gain IV access (yes, he was that hairy!). In the latter, the pt was an asthmatic in respirartory arrest, and my partner needed to knock him down with drugs prior to intubation-- otherwise, I would have taken the time to try to find one of the disposable razors we carry for such purposes.
For non-cutting jobs, I have wedged my knife under doors to keep them open, or under the gurney to keep it from rolling away... some here might frown upon such practice, but I don't do it where I think I'll lose it. Besides, I see my knife (that one, at least) as a tool more than anything, so I make it work for me.
The only other "rescue" knife I have is a Gerber EZ-Out Rescue-- blunt sheepsfoot serrated blade, bright yellow handle. Got it on sale for $10, who could resist? Carried it at work a couple days, then went right back to my PRT-II. What can I say, I need to have a tip on my knives!