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[Efficiency of portable sleep apnea screening instruments]
N Netzer1, W Randelshofer, P Holländer
1Klinik Bad Reichenhall der LVA Niederbayern/Oberpfalz.
Pneumologie (Stuttgart, Germany)
|March 1, 1993
Summary
Two outpatient screening systems for sleep apnoea syndrome were compared in snoring patients. MESAM recorded more events than Apnoe-Check, with 64.6% time congruence between them.
Area of Science:
- Medical Devices
- Sleep Medicine
- Diagnostic Technology
Background:
- Sleep apnoea syndrome diagnosis is increasingly important for primary care physicians.
- Outpatient screening is limited by time and cost constraints.
- Two systems, MESAM and Apnoe-Check, are available in Germany for diagnosis.
Purpose of the Study:
- To compare the diagnostic performance of the MESAM and Apnoe-Check systems.
- To evaluate the time congruence of recorded events between the two systems.
Main Methods:
- MESAM records oxygen saturation, heart rate, snoring, and sleeping position.
- Apnoe-Check measures nasal and oral respiratory flow using a thermistor mask.
- Parallel measurements were conducted on 19 patients and validated against a CO2 infrared absorption spectrometer.
Main Results:
- MESAM recorded a total of 3201 nocturnal events; Apnoe-Check recorded 1488.
- Event counts varied significantly, from 33 to 546 for MESAM and 8 to 255 for Apnoe-Check.
- Time congruence between both systems was observed in 64.6% of all recorded nocturnal events.
Conclusions:
- Both MESAM and Apnoe-Check systems offer outpatient screening for sleep apnoea.
- Further research may be needed to fully understand the clinical implications of differing event recordings.
- The MESAM system appears to capture a higher volume of events compared to Apnoe-Check.