Physician Review of Raw Data for HST

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Physician Review of Raw Data for HST

Postby linuxgeek » Mon Apr 29, 2013 9:08 pm

According to this AASM OCST document:

F-2 – OCST Recording Equipment
Equipment must provide an RDI based on measures that approximates an
AHI based on full polysomnography. Equipment must also measure oxygen
saturation and heart rate and meet the criteria for the codes designated in
standard D-3. Equipment must allow for the display of raw data for manual
scoring or editing.


F-4 – Computer-assisted Scoring
If used, computer-assisted scoring of OCST recordings must be reviewed and edited for accuracy by a board certified sleep physician.

F-5 – Review of Raw Data
The board certified sleep physician interpreting an OCST must conduct an epoch by epoch review of the entire raw data recording for every study interpreted. The
review of the data must assure that the quality of the recording and the scoring of sleep and associated events is sufficient to allow for interpretation. Signed attestation of this review must be kept

So, how does the WatchPAT fit in here? You can't view raw data with it. Right? And even if you could, it doesn't record the normal parameters that allow looking at sleep stage, or respiratory events.
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Postby somnonaut » Mon Apr 29, 2013 11:02 pm

This is why I have been saying that GOld standard studies can identify Gold, Silver or Bronze standard events.
Silver standard studies (full disclosue using lab parameters) can identify Silver or Bronze standard events
Bronze standard studies (those not using lab standard parameters) should not be allowed to identify anything but Bronze standard events.

Gold = Central, obstructive, mixed apnea, categorized hypopneas
Silver = Apnea, Respriatory event (those with 3% desat as per new rules) [Still will not allow the new hypopneas with arousals]
Bronze = "possible respiratory event

Score a respiratory event as a hypopnea if ALL of the following criteria are met:N1,N2,N3 (see Figure 2)
a. The peak signal excursions drop by ≥30% of pre-event baseline using nasal pressure (diagnostic study), PAP device flow (titration study), or an alternative hypopnea sensor (diagnostic study).
b. The duration of the ≥30% drop in signal excursion is ≥10 seconds.
c. There is a ≥3% oxygen desaturation from pre-event baseline or the event is associated with an arousal.

NB: The "N1, N2, N3" does NOT refer to stages, but "notes"
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