unintended dural puncture. We set the threshold at less than 2% based on societal guidelines. The inclusion
criteria are patients having childbirth — labor epidurals, cesarean deliveries, cesarean hysterectomies. We also
decided to add external cephalic versions, since epidurals or combined spinal epidurals are often used for that, and
certainly could result in an unintended dural puncture as well. The procedures we're including are CSE, epidural,
and caudal, with the caveat that there are very few of those in the database. We're also including cases with
multiple procedures, such as replacements, or spinal plus epidural. We're not considering cases with no neuraxial
technique, spinal only, or an unknown neuraxial type. This is the logic for determining UDP, which I'll walk through
a little bit slowly, because it's imperfect but I think the best available option. One is inadvertent dural puncture
documented on the case — obviously the cleanest, however, not all sites are mapping this. Epidural blood patch —
we recognize that some cases of DPE or CSE could potentially lead to a PDPH requiring a blood patch; however, if
we didn't include blood patch, we would miss too many cases, given the documentation issues I just mentioned.
We also have ICD-9 and ICD-10 codes for unintended dural puncture. There's going to be a poll on whether you
think administration of any of these medications would improve identifying unintended dural puncture. There is a
trade-off here, because these things may be given to patients who have a PDPH potentially just from an intended
dural puncture with a spinal needle. However, it might pick up more cases and would improve our sensitivity. The
options are caffeine in the forms you see here, Fioricet, and a sphenopalatine ganglion block. The poll is asking:
should caffeine be considered as part of the measure, should Fioricet be considered as part of the measure, and
should SPG be considered as part of the measure?
Brandon Togioka (via chat) [OHSU]: For the meeting notes: Ashraf Habib recommended looking at
dosages to parse out indication for new neuraxial block: labor vs. surgery.
Brendan Carvalho [Stanford]: While the poll's running, if I can make a comment — we are struggling at the
moment differentiating what you're discussing, which is unrecognized accidental wet tap, from blood patches.
There are many postdural puncture headaches that are either unrecognized wet taps or are just part of a normal
procedure like a spinal. I worry that when you start to blend a lot of different concepts, it starts to muddy the
water a little bit, and what you really want is separate measures for all of these. My other comment is I have some
concern with including versions, because your numerator-denominator becomes problematic, because sometimes
you use neuraxial for them, sometimes you don't. And while you're only considering the ones that use neuraxial, if
you're trying to work out how many versions we have and how many do we use neuraxial, I would struggle to get
that information at the moment.
Sharon Reale [Brigham & Women's]: We'll discuss the numerator and denominator on the next page, but those
are very good points. Here's the poll, and then, Brendan, let's go back to that. Interesting. Caffeine, mostly yes.
Fioricet, even more yes. And SPG blocks, yes as well. I agree — including all those things can kind of muddy the
picture, like you said, Brendan, but they do improve the potential sensitivity. Any other thoughts on that?
Carlos M Delgado Upegui (via chat) [University of Washington]: Sharon, are other peripartum
procedures: PPTL, lac repair, D&C included in the numerator?
Michael Furdyna (via chat) [Brigham & Women’s]: If you’re adding medications, should you specify that
the case must not have a spinal or CSE note?
Christine Warrick (via chat) [University of Utah]: What about cosyntropin?
Michael Furdyna (via chat) [Brigham & Women's]: Do any facilities still give cosyntropin?
Lawrence Tsen [Brigham & Women's]: The last guidelines from ASRA spoke against the use of sphenopalatine
ganglion blocks — and that was something that we contributed to as SOAP. Are we trying to promote, are we
trying to question the practice, or are we trying to just assess things?
Sharon Reale [Brigham & Women's]: More just to pick up cases of potential UDP that were treated with an SPG
block. The numerator is obviously the number of UDPs. The denominator — we had a lengthy discussion at the last