Arousal Analysis by Pulse Wave Amplitude in Patients With Obstructive Sleep Apnea

November 13, 2013 updated by: Karl Heinz Ruehle, Institut für Pneumologie Hagen Ambrock eV

Arousalanalyse Mittels Pulswellenamplitude Bei Patienten Mit Obstruktiver Schlafapnoe

Photoplethysmography is an easy non-invasive method to detect the pulse wave amplitude (PWA) from a finger. This can be measured using the Somnocheck micro system. A pulse wave amplitude decrease (PWAD) is considered to be a marker for autonomic activation. Detecting the PWAD is a surrogate marker for waking reactions (arousal) which eventually will contribute to assess sleep disruption and resulting performance deterioration. Arousal and performance deterioration and its possible improvement under continuous positive airway pressure (CPAP) therapy will be determined in this study.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Patients from the sleep laboratory with verified obstructive sleep apnea syndrome (OSAS) will be asked to participate in this study.

A device is used to determine autonomic arousal over night (SOMNOcheck micro). The Somnocheck micro records oxygen saturation as well as pulse frequency and breathing, and calculates an autonomic arousal index (AAI). Somnocheck measurements will take place in two nights (baseline and with CPAP) and parallel to a standard polysomnography (PSG). The PSG provides data to analyze the arousal frequency according to ASDA rules, which will then be compared to the AAI.

Performance is determined twice (prior and after CPAP therapy) by the use of a steering simulator programme (DASS). Differences in arousal will be correlated with differences in performance (deviation from the road, reaction time). The subjects are also asked to fill out the Epworth Sleepiness Scale (ESS) twice, prior and after therapy. Aim is to compare Somnocheck and PSG measurements and daytime sleepiness with DASS and ESS.

Study Type

Interventional

Enrollment (Actual)

26

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Germany
    • NRW
      • Hagen, NRW, Germany, 58091
        • Helios Klinik Hagen

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

16 years to 66 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Obstructive Sleep Apnea (AHI >5)

Exclusion Criteria:

  • Suspected acute cardiac, pulmonary or neurologic disease

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Diagnostic
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Other: OSA Patients
Device: Somnocheck micro
Study nights in sleep lab with standard polysomnography plus Somnocheck micro. The Somnocheck micro is a device with pulse oxymetry and nasal cannula, which can be worn like a wristwatch. It records information about sleep disordered breathing, oxygen saturation, and pulse wave.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
pulse wave amplitude (PWA)
Time Frame: 8 hours
8 hours

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Institut für Pneumologie Hagen Ambrock eV

Collaborators

Weinmann Geräte für Medizin GmbH + Co. KG

Investigators

  • Principal Investigator: Karl Heinz Rühle, Prof. Dr., Helios Klinik Hagen

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

June 1, 2012

Primary Completion (Actual)

December 1, 2012

Study Completion (Actual)

December 1, 2012

Study Registration Dates

First Submitted

September 19, 2012

First Submitted That Met QC Criteria

September 19, 2012

First Posted (Estimate)

September 21, 2012

Study Record Updates

Last Update Posted (Estimate)

November 14, 2013

Last Update Submitted That Met QC Criteria

November 13, 2013

Last Verified

November 1, 2013

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • SOMNOcheck-2012

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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