Download VII. POLYSOMNOGRAPHY PROTOCOL

22.
DCAC Assessment of PSG Quality
The DCAC has implemented a standard review process for all PSGs. The results of the review are
summarized on DCAC: PSG QUALITY REVIEW FORM. See Appendix B. A copy of this review is
included with each disk that is returned from the DCAC to the CHIME site. The purpose of this form is
to document the PSG quality and to provide feedback to each site concerning the quality of the PSG as
compared to PSGs collected from all other sites. PSG personnel at the site should review this form If
there are any questions or comments concerning the results of this review, these should be discussed first
with the local CHIME PSG REVIEWER and, if necessary then contact the DCAC for further clarification
DCAC PSG QUALITY REVIEW FORM: A summary of the qualities of the PSG signals, in respect to
any problems that may have occurred during the PSG recording session will be documented on the
DCAC PSG QUALITY REVIEW FORM.
The header region of the form summarizes information relating to the site, Study ID, PSG date, optical
transmittal disk, and who completed the PSG review.
Subsequent sections:
1-22. Signal quality: summarized each channel of data. A subjective determination is made as to whether
the signals are of sufficient quality to be used for scoring purposes. In general, the quality of the signal
must be adequate for at least 2/3 (66%) of the night. Channels that are highlighted are those that are most
important to sleep state and respiratory scoring. If a signal is deemed unscorable for the majority of the
night, a comment is made as to the reason for the signal being unscorable.
23-24. Annotations: Awake periods must be clearly marked. Likewise, movements should also be
clearly annotated.
25. Filter Settings: These are determined from the data in the user event table and should be the same as
those already listed.
26. Calibrations: EEG and EMG calibrations are the ALICE calibrations that designate the beginning and
end calibration times for the PSG. The NIMS calibration are the times that the CHIME monitor was
synchronized with ALICE.
27-20. Indicate whether PSG documentation material was received at the time the PSG was reviewed.
30-31. Indicate whether all the data from the PSG was retrievable from the optical disk. If a problem
with restoring the data occurs, a description of the problem and a request for additional information or for
the site to resubmit the data may be made.
32. Overall comments: These are general comments concerning the DCAC review of the PSG.
ςΙΙ−41
10/02/95