PT - JOURNAL ARTICLE AU - J Gonzalez-Bermejo AU - C Perrin AU - J P Janssens AU - J L Pepin AU - G Mroue AU - P Léger AU - B Langevin AU - S Rouault AU - C Rabec AU - D Rodenstein AU - on behalf of the SomnoNIV Group TI - Proposal for a systematic analysis of polygraphy or polysomnography for identifying and scoring abnormal events occurring during non-invasive ventilation AID - 10.1136/thx.2010.142653 DP - 2012 Jun 01 TA - Thorax PG - 546--552 VI - 67 IP - 6 4099 - http://thorax.bmj.com/content/67/6/546.short 4100 - http://thorax.bmj.com/content/67/6/546.full SO - Thorax2012 Jun 01; 67 AB - Non-invasive ventilation (NIV) is recognised as an effective treatment for chronic hypercapnic respiratory failure. Monitoring NIV during sleep may be preferable to daytime assessment. This paper reports the findings of an international consensus group which systematically analysed nocturnal polygraphic or polysomnographic tracings recorded with either volume-cycled or pressure-cycled ventilators. A systematic description of nocturnal respiratory events which occur during NIV is proposed: leaks, obstruction at different levels of the upper airway (glottis and/or pharynx), with or without decrease of respiratory drive and asynchrony.