• Alex Ferré, Gabriel Sampol, Maria José Jurado, Roser Cambrodi, Patricia Lloberes, and Odile Romero.
• Unidad Multidisciplinar de Sueño, Hospital Universitario Vall d'Hebrón, Paseo Vall d'Hebrón 119-12908035, Barcelona. doctorferre@gmail.com
• J Clin Sleep Med. 2012 Apr 15;8(2):163-8.

Study ObjectiveOur 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).MethodFull polysomnography (PSG) and Somté recordings were simultaneously performed in 68 patients with suspected OSA. Data were analyzed blindly by 2 scorers.ResultsA 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.ConclusionsThese data suggest that Somté is an effective device to identify sleep and respiratory variables in patients with suspected OSA.

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