I disagree on the legal aspect. No way to prove either way without an actual case going through the courts, but attempting a skill that you "are supposed to know", but don't (something surgeons/residents do fairly often) is asking for far more trouble. This is especially true if you KNOW you don't know, which is incredibly easy to prove with case logs. Ultimately as the resident, this would fall on the faculty who was supervising (or more likely, not supervising). The resident can certainly be faulted for not bumping things up the chain for sure, but if they weren't trained to do something, it is on the faculty and the residency, at least from the legal perspective. Obviously, they will get **** on left and right by people, but personally, in this case? I think that that is wrong. NG tubes are not a part of my training. While some of our patients certainly have them, it is incredibly rare for me to be managing it, much less placing/removing etc. I suspect that as medicine further sub-specializes and we limit the amount of general surgery exposure this will not be uncommon.
As for how far? I think the honest and best answer is, as far as YOU the provider wants and feels comfortable. It is an unsatisfactory answer for many/most because it doesn't fit inside their neat little boxes, but frankly I don't see any other way of doing it. If a patient is presenting with something that you have not been trained to deal with, you should not be dealing with it. By the same token, you shouldn't be compensated for taking care of those issues either. I know basic chest pain workup and a fair amount of nephrology because that is what I see and do every day. But, I don't expect a radiologist doing a procedure to do a chest pain workup when they don't train to deal with it and don't see it semi-regularly. I expect them to see the patient, assess that it is beyond their training to care for them and get assistance efficiently. I will manage my patient's hyperkalemia because in my training I do it at least 5-6 times a week. But, I will defer to nephrology in almost all non-ESRD patients after the most basic steps are taken because it is in the best interest of the patient that I am not the primary person watching the labs and caring for it. There is a limit/boundary that I have identified and feel very comfortable with from a personal, ethical and legal stand point. If there ISN'T another provider readily available and I can honestly say to a court and more importantly, to myself that it was in the best interest of the patient that I do something beyond what I feel completely comfortable with, then I will do it. For example, I had a belly pain + BRBPR several hours after one of my EVARs, GI said they would scope in the morning despite my arguing and my two CRS were operating in another hospital. So I scoped the patient myself. As a vascular resident, that is a skill set that is beyond what we are expected to have, but clearly useful. (Now of course I have 80+ documented colonoscopies from my PGY1/2 years, but that is a seperate issue, so I feel rather protected).
As with everything, it is a balancing act. If you don't know anything and nobody can refer things to you, then you won't stay in business. If you get known as completely useless except for a very narrow focused area, you aren't going to be very desirable to most referring doctors. In the last year, I have gone out of my way to learn procedures that are primarily performed by cardiologists, cardiac surgeons, spine surgeons and plastic surgeons, because I want to be comfortable with many things that are desirable in a recent vascular surgery graduate that can 'fill in the cracks' wherever I end up. But, while I have a working knowledge of foleys and NG tubes, they are not so emergent that better help can be found than I. I strongly dislike the concept of, "I must be able to handle EVERYTHING." as I mentioned before. But then again, I'm on the 'odder' side of things when it comes to roles in healthcare as I am a rather staunch supporter of most of what physicians do being done by non-physicians (see the numerous threads about NP/PAs) etc. *shrug*