More importantly, would doing such PET scans make meaningful impacts on patients’ health?
Those are the questions that a Medicare expert panel recently considered, and their impression, after carefully reviewing lots of high-quality research, is that we don’t yet have evidence supporting the benefit of using the PET scans. Unsurprisingly, some experts disagree, including a working group convened by the Alzheimer’s Association. This group of experts reviewed the evidence and common clinical scenarios, and concluded that in certain select situations, use of the PET scan would be appropriate. (See their guidelines here.)
As someone who evaluates many memory complaints, I’m certainly interested in Medicare’s inquiry, and in whether they’ll decide to cover the scan. (The NYT’s New Old Age Blog has a nice summary of the debate; a good read if you haven’t seen it yet, esp the comments.)
Also, I blogged last fall about how I thought the new scan could and wouldn’t help clinicians like myself evaluating cognitive complaints, especially in those who likely have early dementia. In particular, I commented on the difficult period of uncertainty that we often go through, as we wait to see if subtle problems progress or not.
Would the PET scan meaningfully help with that period of uncertainty? Hard to say, and it hasn’t yet been tested. I myself think that this period of uncertainty can be pretty hard on families, but measuring this burden is tricky. (Much easier to measure hospitalizations and utilization!)
I also suspect that it’ll be hard to prove benefit from “knowing earlier,” in large part because our healthcare system is currently so poorly equipped to meaningfully help people with a new dementia diagnosis.
Which brings me to the part of this story that has me annoyed.