I agree with this for the most part. But I'm not so sure I agree with only using non-particulate for interlams. If I do a TFESI with dex and it doesn't provide lasting relief, the idea of doing an ILESI with dex seems pretty unlikely to work to me. I feel like that is destining the patient for surgery, and I have a very hard time believing that an ILESI with beta or depo or any particulate steroid poses as high of a risk as any spine surgery. I'm not saying that particulate is better than dex, but I'm saying that in a SPECIFIC individual (not the general population) that has already failed dex but has not failed particulate, why not try it? The same could be true for someone who already failed an ILESI with particulate - I think it would be reasonable to try a TFESI with non-particulate in this sort of patient.
Additionally, I'm not sure I've seen any evidence for particulate steroid being more dangerous than non-particulate for ILESI. I haven't seen any anatomic studies indicating that arteries would be back in that region either, but please let me know if there is such evidence out there. The Safeguards to Prevent Neurologic Complications After ESI from 2015 recommends non-particulate for TFESI but makes no specific recommendation regarding the type of steroid to be used for ILESI, for what it's worth. And, that's in the context of them not specifically recommending that ILESI be performed with live fluoro, which indicates to me, at least, that the committee's opinion is that the risk of a serious complication from a particulate steroid injected into a vessel during an ILESI is not large enough to even think about.
On a related note, since we are talking about caudals - is there any evidence for doing these without stopping blood thinners? I'm sure the risks if you're using a small 25g 1.5 inch needle are small, but is there actually any evidence for it? In residency I saw people doing these with patients on coumadin, but more recently I haven't...