Scientific Investigations
Neurophysiological Two-Channel Polysomnographic Device in the Diagnosis of Sleep Apnea
http://dx.doi.org/10.5664/jcsm.1770
Álex Ferré, M.D.1,2; Gabriel Sampol, Ph.D.1,3,4; Maria José Jurado, M.D.1,2; Roser Cambrodi, M.D.1,2; Patricia Lloberes, Ph.D.1,3,4; Odile Romero, M.D.1,2,4
1Multidisciplinary Sleep Unit; 2Clinical Neurophysiology Department; 3Pneumology Department, Hospital Universitari Vall d'Hebron, Universitat Autónoma de Barcelona, Barcelona, Spain; 4CIBER de Enfermedades Respiratorias (CIBERES), Barcelona, Spain
Study Objective:
Our objective was to evaluate a portable device (Somté, Compumedics, Australia), which incorporates 2 neurophysiological channels (electroencephalography and electrooculography) with cardiorespiratory monitoring for the diagnosis of obstructive sleep apnea (OSA).
Method:
Full polysomnography (PSG) and Somté recordings were simultaneously performed in 68 patients with suspected OSA. Data were analyzed blindly by 2 scorers.
Results:
A good agreement between methods in sleep efficiency was observed (68.8% [18.4] with PSG vs 68% [19.1] with Somté [p: n.s.] for scorer 1, and 67.5% [19.1] vs 68.4% [18.5; p: n.s.] for scorer 2). The apnea-hypopnea index (AHI) obtained with Somté was lower than with PSG: 19 (17.8) vs 21.7 (19) (p < 0.001) for scorer 1, and 16.6 (16.7) vs 20 (18.8) (p < 0.001) for scorer 2. The sensitivity of Somté for a PSG-AHI > 5 was 91% for scorer 1 and 90% for scorer 2, while specificity was 77% and 90%, respectively. The areas under the receiver operating curve for different PSG-AHI cutoff points (≥ 5, ≥ 15, and ≥ 30) were 0.81, 0.90, and 0.86, respectively, for scorer 1, and 0.90, 0.88, and 0.83 for scorer 2.
Conclusions:
These data suggest that Somté is an effective device to identify sleep and respiratory variables in patients with suspected OSA.
Citation:
Ferré Á; Sampol G; Jurado MJ; Cambrodi R; Lloberes P; Romero O. Neurophysiological two-channel polysomnographic device in the diagnosis of sleep apnea. J Clin Sleep Med 2012;8(2):163-168.
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