Translated title of the contribution: Influence of cardiorespiratory polysomnography on sleep structure and sleep quality in young healthy volunteers

R. Conradt, T. Penzel, H. Schneider, J. H. Peter

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Epidemiological studies proved a high prevalence of sleep related disorders. Sleep related breathing disorders are most important because they are common and they increase the health risk. A clear obstructive sleep apnea can be diagnosed using minimal equipment. However, the diagnosis of heavy snorers and of patients with sleep- and breathing related disorders needs a polysomnography with recording sleep, respiration and cardiovascular signals. This effort is necessary to estimate the individual risk for the patient. 24 healthy male volunteers with mean age 30.7 ± 3.3 years and a body mass index (BMI) 23.6 ± 3.3 kg/m2 participated in the study. All subjects were recorded for two consecutive nights. The aim of the study was to investigate how much sleep structure and sleep quality were changed with an extensive all-night recording (cardiorespiratory polysomnography with esophageal pressure measurement) in good sleepers with no sleep related complaints. Percentages of sleep stages (% stage 1: 6.1 ± 2.9; % stage 2: 51.4 ± 8.5; % stage 3/4: 20.4 ± 5.6 and % stage REM: 22.1 ± 4.3), sleep efficiency (86.5 ± 8.8%) and the number of sleep cycles (3.5 ± 0.72) were found comparable to standard data. The dominant findings were a high number of arousals (96 ± 39.5) and of short episodes of awakenings (10.7 ± 6.1) during light sleep (stage 1 and 2). One week before the night recordings and one week after, the volunteers had to complete a daily questionnaire on sleep behavior. These subjective data revealed significant (p < 0.05) worse results for the nights in sleep laboratory and the days after compared to the nights and days at home. Daytime psychodiagnostic testing following the two sleep lap nights by means of a numbers-connecting-test evaluating cognitive processing speed revealed normal values according to the standardization sample of this test. It can be concluded that an extensive recording including the esophageal pressure measurement increased the number of arousals and awakenings during light sleep. Subjectively the volunteers found nights in sleep lab worser although no changes in sleep structure were found. After two nights in the laboratory there were no objective decreases in daytime performance.

Translated title of the contributionInfluence of cardiorespiratory polysomnography on sleep structure and sleep quality in young healthy volunteers
Original languageGerman
Pages (from-to)244-248
Number of pages5
JournalEEG-EMG Zeitschrift fur Elektroenzephalographie Elektromyographie und Verwandte Gebiete
Issue number4
StatePublished - 1994
Externally publishedYes


  • normal respiration
  • sleep fragmentation
  • sleep quality
  • volunteers

ASJC Scopus subject areas

  • Clinical Neurology


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