tl;dr that is still the working hypothesis.
but the sleep study also yielded a lot of other data that i'm trying to process. forgive me for doing it here.
the polysomnography was monday night, a diagnostic study to rule out sleep apnea, evaluate hypersomnia, and follow up with a multiple sleep latency test (mslt) the following day. the coded diagnosis following just this study was unspecified physiological, or organic, hypersomnia, periodic limb movement disorder, and "other" respiratory abnormality.
during the almost-ten-hour recording period, i slept nearly eight hours. it took me 53 minutes to fall asleep and 93 minutes to get to rapid-eye-movement (rem) sleep. (nb i thought i hadn't slept almost at all that night and was SO discouraged because i thought they surely wouldn't have been able to collect any data. interesting.) i spent almost a third of those ten hours in rem sleep, which is about twice normal for my age. (this comes as no surprise to folks who, like lisa, have listened to me recount my dreams over the years. i have a lot of them.)
they gave me a bunch of sleep-continuity figures of which i can't seem to make much sense. same with my breathing-pattern summary. i had some obstructive apnea (stopping breathing) and hypopnea (shallow breathing) and flow-limited events (the three of which together i interpret to be a measure of the zillions of times i couldn't breathe because of the stoopy wires and tubes in and around my nose because that's where i breathe) but no other apnea or hypopnea (so that's good). and another good thing was that i spent all of my sleep time in the top range (90–99%) of oxygen saturation.
for the mslt, which was the next day, consisted of four naps (which just means that the technician came in and told me that it was time for a nap, calibrated the instruments, and let me try to sleep for about 20 minutes before coming in to wake me up). it took me 7.5 minutes to fall asleep for the first nap, decreasing with each nap down to 2 minutes (yes, two minutes) to fall asleep for the fourth nap. (normal is about 15 minutes. and this decrease in latencies is apparently not normal.) i didn't achieve rem sleep in the first three naps but got 14 (out of 20) minutes of rem time in the fourth nap--a sleep-onset rem period (soremp). i slept for about three-fourths of the time in each of the other three naps. my mean sleep latency was just under 5 minutes.
the coded diagnoses remained the same for the mslt, but they had a few additional impressions: my results are compatible with pathologic sleepiness (what an awful term!) without definite evidence of narcolepsy, but the one soremp during the last nap is apparently also pathologic.
so the doctor is sending me for an echocardiogram in a month to ensure that i have no structural heart issues, and he's consulting with my neurologist who treats me for migraine, and then he's planning to prescribe a stimulant to treat the sleepiness. his diagnosis is currently narcolepsy without cataplexy. i wish we could start treatment sooner, but i'm trying to be patient. right now i just need to figure out a plan for work, as i'm unable to work more than about half a day most days.
anyway, that's the status.