A Spanish study comparing home respiratory polygraphy with in-lab polysomnography found that the diagnostic tools worked about equally well, reports MedPage Today. 

A total of 430 patients were randomized to either the HRP or polysomnography protocols. The HRP machine (Natus’s Embla and Embletta devices) measured oxygen saturation, airflow through nasal pressure, and thoracic and abdominal movements measured by piezoelectric bands.

Patient outcomes were evaluated at four points: at baseline, one month, three months, and six months following sleep assessment.

CPAP was prescribed more often in the polysomnography group (68% versus 53% with HRP), but this difference did not appear to affect patients’ clinical outcomes. No significant differences were seen in patient characteristics between the two groups at baseline.

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