Standard, attended overnight polysomnography was performed in our sleep laboratory (SOMNOscreen™ PSG Tele, SOMNOmedics GmBH, Germany, CE0494). Recordings were manually scored by two somnologists. Sleep stages were determined in 30 s epochs according to Rechtschaffen and Kales32 . Apnea was defined as the absence of airflow for more than 10 s; hypopnea was defined as a clearly discernible reduction in airflow for more than 10 s associated with an arousal and/or reduction in oxygen saturation >3%33 (link). The AHI was defined as the number of apneas and hypopneas per hour of sleep. Similarly to previous publications34 (link)35 (link) the term ‘OSA’ refers to moderate or severe apnea (AHI ≥ 15) in this paper, unless stated otherwise. Desaturation index was defined as the number of desaturations per hour of sleep. We used 5/hour for definition of high versus low number of desaturation index.
Somnoscreen psg tele
Manufactured by SOMNOmedics
Sourced in Germany
The SOMNOscreen™ PSG Tele is a laboratory sleep monitoring device produced by SOMNOmedics. It is designed to record physiological data during sleep studies.
Automatically generated - may contain errors
Lab products found in correlation
2 protocols using somnoscreen psg tele
1
Overnight Polysomnography for Sleep Apnea
2
Polysomnography Techniques in Sleep Studies
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Attended in‐hospital overnight PSG was performed in sleep laboratories using standard techniques. The PSG systems used were Somnoscreen PSG Tele (Somnomedics GmbH, Germany) in the UK, Rembrandt PSG (Embla Sys Inc., USA) in Essen, and Embla S7000 PSG (Embla Sys Inc., USA) in Herne. Outputs from these PSG recording systems were similar. Thoraco‐abdominal motion was measured by respiratory inductance plethysmography, and nasal airflow was monitored by nasal pressure cannula and an oral flow thermistor. Arterial oxyhaemoglobin saturation (SaO2) was monitored by pulse oximetry. Sleep was monitored using a standard neuro electrode placement system to include electroencephalogram references (C4/A1), (C3/A2), and (O1/A2). Submental and anterior tibialis electromyograms were also recorded. Electrooculogram electrodes placed on both lateral canthi measured rapid eye movements. The transducers and lead wires permitted normal positional changes during sleep as well as movement out of bed. Bedtime was at each subject's discretion, and PSG was terminated after final wakening.
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