Speaking as a former long-term (I got better) faculty in an EM program, we always told our graduating residents that you could call us ANYTIME at work for a question/curbside/whatever. Sometimes it just helps to bounce things off someone else to clarify one's clinical quandry
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I'm going to take a different tack on this one.
I know this is routinely recommended to new graduates to call their old program staff for a curb side when in doubt.
But here's the thing. If after complete residency training, you are unsure about an issue, it probably is a complicated issue. There is a good chance another ER physician may not be completely confident what to do either. Furthermore, your curb-side consult to your former staff isn't really medico-legally defensible or documentable.
What do I recommend:
Call a specialist for a question. That person is actually on call for you, you can document their name, time, and recommendation in your note. It is probably a better stronger opinion anyways than a second ER physician. Furthermore--even if they are wrong--they are the specialist and considered to be the higher level decision maker who is now responsible for the issue.
If you have an EKG you aren't comfortable with, call your cardiologist on call to look at it.
If you have a question and no relevant specialist at your hospital, call the local tertiary referral center transfer line. There are always region-wide resources for particularly high liability situations such as stroke, STEMI, trauma, peds.
For example, I do some shifts at a critical access hospital with infrequent in-house neuro coverage. They have a pre-existing agreement with the regional tertiary care center with the university medical center stroke team. They have a one-call direct access to stroke neurology team through their transfer/access center. I call them directly on any stroke activation for recommendations on lytics, give/not give, transfer/not transfer, intervention/not-intervention and I document their recommendations faithfully.
Especially if you are going to be working at a small hospital with few specialists on call, you should find out what their arrangements are for stroke, STEMI, trauma, peds, etc.
I bet they already have an existing system to get support from a tertiary care center. When you are interviewing for jobs, you need to specifically ask about these things. If they do not have these arrangements, don't work at that hospital.
Otherwise, if you have a really ER specific question like how to dispo a gray-zone patient, just er on the side of caution the first year out and just admit them. If the internist/hospitalist says they don't need to be admitted, and you don't feel that strongly: Boom, there's your question answered, and you can document the recommendation made by a on-call physician for your facility.