SBAR is a good thing, it really is. But, it's not necessary to use it all of the time. And, really, if you are calling the MD for something, that is your recommendation. For instance, "Hi, I'm calling about Mr ______. His HR is still 140, and I gave prn lopressor, dilaudid, etc, and he is resting comfortably. He had surgery 2 days ago for X. I already sent down a stat CBC to check for blood loss (that was your intervention and would have been your recommendation if you didn't do it yet), and then say, what more should we do?" (It depends on where you work, but in the ICU where I work, I feel that sending down lab work without an order, getting EKG's done, and Xrays done without the order first is actually best practice; waiting any period of time for the doc to call back could be detrimental since it takes a little while to process results anyway). I mean, really: if my patient is in obvious RD (that's not anxiety), a chest xray and an abg are in order. The physicians appreciate that we do what we can first prior to calling them. Never order any drugs without an order, though, obviously.
Sometimes, you really won't know what to do, and you'll just call, give them the quick update, and say, "I really don't know what more to to do for this person at this point." And, it's their job to come up with the answer.
But, just viewing your patient holistically, and making sure you look at the whole picture will certainly help you.