You may get more bites by reaching out to
ISEN :: International Society for ECT and Neurostimulation which is the main society in US and probably internationally. There is an email list serve that one of the admin type folks might be able to forward your request into.
The Journal of ECT
The Journal of ECT will often have publications sort of documenting trends within in countries around the world. You could possibly look to find some of these for the US to answer your question of trend. Which I believe is diminishing in numbers of treating Psychiatrists and in procedures performed nationally.
I likely fit your target demographic of who you want to interview, but I wish to maintain the illusion of my anonymity. At best you'll get my response here, which because its the internet, maybe I'm a bot? LOL.
I set up an ECT service (in PACU) just before your preferred 5 years timeline within a large health system. It had some ECT at one distant location else where but the not the site that I was at. These are the quick hurdles I ran into:
1) the hospital med staff didn't have on the privileges sheet a description for ECT. They didn't have to have one, but for bureaucracy purposes they decided they wanted one. So I had to find samples form other hospitals, write up a draft. My medical director got involved and changed the wording poorly, and that took more TIME and this committee to approve took more TIME. Then for me to apply for the privilege took more TIME. (TIME = 1-2 months). Then the hospital chief medical officer(s) wanted an outside reviewer to do a chart review of my first few procedures before fully granting the hospital privilege's to me which took TIME and money to pay that outside reviewer. It also took TIME for the hospital to approve and alot the money in their budgeting for the capital for device acquisition, then its delivery, then the biomed person in hospital to look it over, inventory, and stamp approved on it.
2) hospital had nursing union and this was a position that was half in PACU, half in outpatient for the ECT nurse that I wanted. Possibly the role could have been split with receptionist like staff in outpatient and use existing PACU RN staff. However, this is such a unique treatment and unique roll, that from my experiences in residency, a true ECT RN is invaluable and better than a split staffing model. This took TIME to post this position, fight with the union, and get this person training to function in both areas - but yet the PACU nurses retained that they had to hold the paddles - and not the ECT nurse. Ridiculous.
3) My medical director at start stated would also pick up privilege and be my emergency or holiday backup. This person didn't, said no after I approached once my privilege were formally approved (i.e. I would be the one to supervise and sign off this persons privilege). I ran this service solo. It impacted my personal life. I had a back surgery on like a Thursday/Friday, was back to work on Monday. Made sure no opioid Rx to prevent any risk of cognitive impairment. I could only shut the service down at most a week at time - including for my wedding that was on the other side of the globe. My other Psychiatrist colleagues had no interest in picking up privileges from the start, and maintained that stance.
4) I started the service for clinical patient benefit seeing the positive changes from residency and feeling frustrated of not having this option to offer patients I know who could benefit greatly from this modality. Having the service was such a relief. Yet, potential patients that other colleagues had in the outpatient panel, or even on the inpatient unit were under referred; or not even offered the treatment option. The culture at this location was quite different compared to where I trained and the ECT were more common, and recommended to patients.
5) The local Big U had stopped or closed their service down. I was it from one whole state, and a massive chunk of another state. People were doing 'medical tourism' to come to this hospital and routinely the looked around were like, "Why here?" "because I'm here?" *since I left this Big Box shop, the Big U is up and running again and another hospital has a small geriatric inpatient unit focused ECT service - both of which are practically impossible to get patients into.
6) Each state has different laws for involuntary ECT - my state did - and interacting with the local courts to utilize court ordered ECT was its own process.
7) The hospital PACU nurses were very wary of ECT, and quite suspicious of it and its role. It took TIME to get them to see the positive transformation of patients from depressed or floridly manic/psychotic back to their old selves. It soon became the service they enjoyed working with. But that initial culture block and education, and teaching took time. I got more hand written cards from my ECT patients or ECT patient family members expressing gratitude for life saving treatment than I did with the other services I offered.
8) I was part of a large health system so I wasn't able to see what they bills were for patients or how much the insurance processed but I got generic feedback from the suits that it was positive service line. Yet, it was expanding and I needed to add more treatment days/slots and consult blocks to get people in. My employer didn't want to support and expand this service because they valued me more as an inpatient psychiatrist covering the unit.
9) Insurance companies were a constant barrier for I and my ECT nurse. Only approving say 6 or 8 treatments, then wanting my paperwork to authorize more treatments. Then there was the barrier of insurance authorizations to do a continuation phase of ECT after the acute series. Most opted out of this, but those who were interested only a few got authorized by insurance.