G Siemon’s scientific contributions

What is this page?


This page lists works of an author who doesn't have a ResearchGate profile or hasn't added the works to their profile yet. It is automatically generated from public (personal) data to further our legitimate goal of comprehensive and accurate scientific recordkeeping. If you are this author and want this page removed, please let us know.

Publications (2)


[Studies with the fully automated EEG sleep analysis system QUISI].
  • Article

January 2001

·

11 Reads

·

4 Citations

Pneumologie

F Gfüllner

·

G Siemon

To judge sleep reliably would be interesting not only for outpatient sleep diagnostics, but also in the inpatient sphere. A step in this direction is the easy-to-apply fully automated sleep-EEG-analysis system QUISI. Nine males patients with obstructive sleep apnoea syndrome were examined simultaneously by polysomnography and the QUISI system. A comparison of the sleep profiles evaluated by polysomnographic recordings using Rechtschaffen and Kales' rules with the automated classification using QUISI recording shows that the difference of the sleep parameters sleep period time (SPT), total sleep time (TST), REM, stage 1, stage 2, slow-wave sleep and the awake stage of maximum five patients ranged between +/- 10 minutes, respectively +/- 5 per cent. Only two of nine sleep profiles could be compared as far as the sequence of the sleep stages was concerned. According to our results it is important to edit the original data and to treat the fully automated sleep profile. We cannot recommend QUISI to establish sleep profiles for the obstructive sleep apnoea syndrome.


Untersuchungen zum vollautomatischen Schlaf-EEG-Analysesystem QUISI®1

December 2000

·

18 Reads

·

3 Citations

Pneumologie

Die Moglichkeit, mit einer einfachen Methode den Schlaf zuverlassig beurteilen zu konnen, ware nicht nur fur die ambulante Schlafdiagnostik, sondern auch fur den stationaren Bereich sehr interessant. Das einfach anwendbare vollautomatische Schlaf-EEG-Analysesystem QUISI® ist ein Ansatz in diese Richtung. Neun mannliche Patienten mit einem obstruktiven Schlaf-Apnoe-Syndrom wurden simultan mittels Polysomnographie und dem QUISI®-System untersucht. Der Vergleich zwischen den visuell nach Rechtschaffen und Kales ermittelten Hypnogrammen und den von QUISI® vollautomatisch bestimmten Schlafprofilen zeigt, dass die Unterschiede der Schlafparameter sleep period time (SPT), total sleep time (TST), REM, Schlafstadium 1, Schlafstadium 2, Tiefschlaf und des Wachanteils an der SPT bei hochstens funf Patienten in einem Bereich innerhalb von ± 10 Minuten bzw. ± 5 Prozentpunkten lagen. Nur zwei von neun Schlafprofilen waren in der Abfolge der Schlafstadien vergleichbar. Nach unseren Ergebnissen ist es fur die weitere klinische Anwendbarkeit sehr wichtig, dass die Originaldaten von QUISI® einsehbar gemacht werden und dass das vollautomatisch erstellte Hypnogramm editierbar wird. Eine weitere Uberprufung der Validitat von QUISI® im Rahmen groserer Studien halten wir fur dringend notig. Nach der bisherigen Datenlage kann QUISI® derzeit nicht zur Erstellung eines Hypnogramms fur das obstruktive Schlaf-Apnoe-Syndrom empfohlen werden. To judge sleep reliably would be interesting not only for outpatient sleep diagnostics, but also in the inpatient sphere. A step in this direction is the easy-to-apply fully automated sleep-EEG-analysis system QUISI®. Nine males patients with obstructive sleep apnoea syndrome were examined simultaneously by polysomnography and the QUISI® system. A comparison of the sleep profiles evaluated by polysomnographic recordings using Rechtschaffen and Kales' rules with the automated classification using QUISI® recording shows that the difference of the sleep parameters sleep period time (SPT), total sleep time (TST), REM, stage 1, stage 2, slow-wave sleep and the awake stage of maximum five patients ranged between ± 10 minutes, respectively ± 5 per cent. Only two of nine sleep profiles could be compared as far as the sequence of the sleep stages was concerned. According to our results it is important to edit the original data and to treat the fully automated sleep profile. We cannot recommend QUISI® to establish sleep profiles for the obstructive sleep apnoea syndrome.

Citations (2)


... As early as 2004, Fischer et al showed that a visually evaluated single channel EEG is effectively suited for characterizing sleep, and also for snorers and patients with obstructive sleep apnea (OSA). Gfüllner and Siemon (2000) had previously raised concerns on this reduced recording practice. Actigraphy without additional signals is used as an indirect way to study sleep (Jean-Louis et al 2001, Weiss et al 2010, Shambroom et al 2012, Kosmadopoulos et al 2014. ...

Reference:

Actigraphy combined with EEG compared to polysomnography in sleep apnea patients
Untersuchungen zum vollautomatischen Schlaf-EEG-Analysesystem QUISI®1
  • Citing Article
  • December 2000

Pneumologie

... g a single lead EEG recording device. Satisfactory analysis of a single channel EEG is also possible (Koley and Dey 2012, Kosmadopoulos et al 2014). As early as 2004, Fischer et al showed that a visually evaluated single channel EEG is effectively suited for characterizing sleep, and also for snorers and patients with obstructive sleep apnea (OSA). Gfüllner and Siemon (2000) had previously raised concerns on this reduced recording practice. Actigraphy without additional signals is used as an indirect way to study sleep (Jean-Louis et al 2001, Weiss et al 2010, Shambroom et al 2012, Kosmadopoulos et al 2014). Actigraphy had been applied in patients with sleep-related breathing disorders (Dick et al 2010). Ho ...

[Studies with the fully automated EEG sleep analysis system QUISI].
  • Citing Article
  • January 2001

Pneumologie