Abstract

SILIO, Julio et al. Severidad del índice de apneas hipopneas en relación a la posición supina y no supina, incluyendo los arousales subrogantes en la poligrafía respiratoria nocturna. Rev. am. med. respir. [online]. 2015, vol.15, n.2, pp.117-121. ISSN 1852-236X.

The diagnosis of severe Sleep Apnea Hypopnea Obstructive Syndrome (SAHOS) is performed by measuring the Apnea Hypopnea Index (AHI ) and requires reliable diagnostic methods. Owing to the high frequency of this disease, different equipments of Respiratory Polygraphy (RP) have been developed as alternatives to supervised polysomnography (PSG).There is an acceptable diagnostic concordance among these devices. Respiratory events were recorded as recommended by the Spanish consensus 2005, adding the Respiratory Surrogate Arousal (SA), interpreting SA as the presence of reduced flow in the cannula of amplified pressure, followed by an effort represented by hyperventilation without concomitant desaturation, including at least two respiratory cycles. The analysis included 1,128 studies, of which 1,101 made with the same technology. The studies included respiratory polygraphy performed with a flow sensor through nasal cannula, oximetry monitoring, respiratory band and a sensor for supine and non supine position. The estimate of the Apnea Hypopnea Index - AHI - (total) with RP comprises the sum of obstructive apnea, mixed apnea, central apnea, hypopnea and SA, according with the estimated sleep time. Also the AHI was evaluated in supine position (AHIs) and in non supine position (AHIn). Statistical analysis was performed using Pearson's correlation and calculation of Chi square between AHIn and AHIs; there was a statistically significant relationship. We note that the apnea hypopnea index in patients with SAHOS, including surrogate arousals, measured with the amplified pressure cannula, presents greater severity in supine than in non supine position.

Keywords : Apnea; Hypopnea; Surrogate; Arousals; Position.

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