Probably referring to that Sieber study randomizing hip fx patients undergoing surgery under spinal + prop infusion to BIS of 4o or BIS of 80 that showed I think decreased duration of postop delirium (think incidence was unchanged).
Anyway, my take-home from that was more "don't do a GA plus a spinal for old people" than it was "use a BIS all the time."
I'm not anti-BIS (we used it a ton in residency), but I think it's utility is mostly in specific situations (TIVA, hx of intra-op awareness, etc). I don't think it's the worst thing in the world for residents to play around with it, especially when first starting out, because it can be interesting from an academic standpoint (how much or how little volatile certain patient populations need, for instance). But the more experienced you get, the less utility it has.
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BIS and postoperative delirium
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