Opioid Equivalency Measure and Procedure Phenotypes
Kate Buehler (MPOG): Sorry, I'll repeat myself. We just retired, or pulled back, the opioid equivalency
measure for tonsillectomy from the dashboard because there are some calculation issues on the back
end, and there's been a lot of debate. Clark Fisher from Yale recently reviewed this measure at a quality
committee meeting and raised some good points about whether we should include neuraxial anesthesia
when calculating opioids. There isn't good literature to tell us what those calculations should look like,
so we're not sure whether neuraxial should be included or excluded. Oral morphine equivalents are
fairly straightforward, and there's a reasonable amount of literature on converting between oral and IV
routes, but not for many of the other routes. So we're considering pulling back a lot of that calculation
until there's literature to support it.
As we do this, we plan to roll the measure out for a limited procedure group, starting with adults, to
make sure the math holds up, then roll it out for pediatrics if it proves meaningful — likely spine or
whatever the group felt was most useful. We're also working on new procedure type phenotypes at the
same time, so it would help to know if there's something besides tonsillectomy/adenotonsillectomy that
would be useful from a pediatric perspective. We can start working on those new phenotypes while we
finish ironing out the opioid equivalency calculations for adults. This would be a good time to suggest
procedure types you'd be interested in if tonsillectomy isn't the focus area.
Morgan Brown (Boston Children’s): I haven't read the paper Dr. Fisher is working on, or whether it's
published yet, but he's looking at some interesting concepts — for example, giving a patient all of their
opioid at the beginning of a case is different from giving opioid throughout the case, and he's exploring
curves and modeling techniques to determine how much opioid a patient really received, since he's
approaching it from a research perspective. He presented some of that work when looking at
intraoperative opioid use, including how to account for remifentanil — does it count at all, since it's
often considered free? Even though those equivalency tables are well published, I think some of the
values may not be well substantiated — I haven't been able to trace where some of the numbers
originated.
Joe Cravero (Boston Children’s): We're talking about two different things here — does this become a
reported metric, or is this a research project?
Morgan Brown (Boston Children’s): If we're looking at this from a research perspective, we might take
an age group of children having a particular procedure and do a deep dive into exactly what they're
receiving in terms of opioids. The nice part about tonsillectomy and tonsillotomy is that nobody is
getting a spinal for those cases, and with an operative time of 10 to 12 minutes, the timing of opioid
delivery is probably less important than it would be for a three-hour operation. There's a lot to discuss,
but I want to draw a clear distinction.
Cathy Jones (Boston Children’s): I believe they were originally treating it as a metric, but after the
quality committee meeting, they decided to take it off and fix some issues before it returns as a quality
metric. We never really used it at Boston, because it looked a little off to me and I couldn't quite figure it
out, but that's exactly right — we had a metric around this, not many people used or looked at it, and
when people started examining it, they found issues, so it was rolled back.
Morgan Brown (Boston Children’s): We need to refine the calculations behind the scenes, but research
is happening at the same time — these efforts are running in parallel. What we're focusing on right now
is purely informational, not a metric in the same way as the rest of the MPOG measures, which have