Sleep and Breathing

, Volume 14, Issue 2, pp 109–114

Diagnostic performance of single airflow channel recording (ApneaLink) in home diagnosis of sleep apnea

  • Regine Ragette
  • Yi Wang
  • Gerhard Weinreich
  • Helmut Teschler
Original Article

Abstract

Background

ApneaLink is a novel single-channel screening device for sleep apnea detection which is based on pressure-transduced measurement of oronasal airflow, summarised as respiratory disturbance index per hour of recording time (RDIApneaLink). We tested ApneaLink's diagnostic performance in a patient population with high prevalence of sleep apnea.

Methods

ApneaLink was applied simultaneously with in-laboratory polysomnography (PSG) (n = 102, 24 female, age 54.7 years) and sequentially with PSG in the unattended home setting (n = 131, 37 female, age 59.1 years). Predictive values were computed for apnea-defining thresholds of apnea–hypopnea index (AHI) ≥ 5/h, ≥10/h, ≥15/h. Night-to-night variability (NNV) was assessed over three consecutive nights (n = 55, 10 female, age 48.9 years).

Results

RDIApneaLink correlated well with apnea–hypopnea index on PSG (PSGAHI) on simultaneous (r = 0.98, bias −0.7) and unattended home application (r = 0.95, bias −0.6). Predictive values were highest at AHI ≥ 10/h (in-laboratory: sensitivity 91.1%, specificity 87.5%, LR+ (positive likelihood ratio) 7.4, LR− 0.1; home: sensitivity 80%, specificity 85.5%, LR+5.5, LR− 0.2). NNV was low \( \left( {V = 0.58 \pm 0.44,{\text{range}}\,0 - 1.69} \right) \).

Conclusion

ApneaLink is an accurate screening tool for sleep apnea in a population with high prevalence of the disorder.

Keywords

ApneaLink Sleep-disordered breathing Sleep apnea Obstructive sleep apnea Screening 

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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Regine Ragette
    • 1
  • Yi Wang
    • 1
  • Gerhard Weinreich
    • 1
  • Helmut Teschler
    • 1
    • 2
  1. 1.Ruhrlandklinik, Department of Respiratory Medicine, Faculty of MedicineUniversity of Duisburg-EssenEssenGermany
  2. 2.Graduate School of Biomedical EngineeringUniversity of New South WalesSydneyAustralia

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