I think it’s important to have a core set of procedural skills as an IM resident irrespective of what specialty you are going into. I don’t care if you are doing endo or ID - if you are a resident working in my CCU, you need to be able to at least attempt a line. I don’t mind coaching you through one - but you’d better take care of your patient and know what you’re doing. My residency was very critical care heavy and we didn’t always have fellow or attending backup at night - I became very comfortable doing central lines and arterial lines in both stable and crash situations. I graduated doing 30-40 CVCs (including subclavian), 30+ arterial lines, more paras than I care to count, and lots of thoras and LPs.
I agree that in medicine your ability to synthesize history and physical info, form a differential, interpret an EKG, CXR, and labs, is what separates us from EM, who by and large focuses on triaging sick and not sick, diagnosing what will kill you, and consulting the appropriate service when necessary. Both are absolutely essential services and you could argue that being more procedurally versatile is more core to EM training. After all IM unless you do certain subspecialties you won’t do fracture reductions, emergency thoracotomies and internal cardiac massage, etc.
But that being said - and I think I’m a bit of a dinosaur in this - even if you never intend to do procedures ever, it should be a core competency and capability for an IM resident. I think being able to slam in a line acutely is as important a skill as synthesizing all the data because it really makes you appreciate the situation in a well rounded manner. It also shows confidence in being able to manage the patient.
As a third year cards fellow I do think my line competency helped me a great deal. I can do much more advanced procedures with ease (cardiac catheterization, TEE, TVPs) and can usually put a crash line in within eight minutes from opening the kit to suture. But determining who needs the TVP, who needs the balloon pump or Impella, who gets a swan, who will benefit from the procedure and how to manage and interpret the device are all part and parcel in IM - not just procedurize and stabilize, which is often what you see in EM