MENU EVI - Expiratory Variability Index Proprietary analysis of a child’s whole-night respiration data allows the Ventica System to report the measurement’s Expiratory Variability Index, EVI. A bar chart displays how the EVI compares to reference data obtained from healthy control subjects. The bar chart uses an easy-to-interpret traffic light color scheme, with a numeric reference scale. Download the clinical booklet Check the evidence for EVI EVI describes the amount of variability between individual expirations during a full night’s sleep Children at a lower risk of bronchial obstruction, or those using correct medication for asthma control, have high variability in the shape of the expiratory flow-volume curves during night-time tidal breathing, and a normal EVI result is therefore high (EVI > 14.0). When an obstruction is present, there is less variability in expiration patterns, and the EVI result is low (EVI <= 14.0). Analysis of a child’s whole-night respiration data allows for the calculation of the child’s EVI. A Ventica EVI result describes the amount of variability between individual expirations during the night’s sleep. The Ventica software only uses data recorded from periods of restful sleep. Reliable EVI calculation based on sophisticated artifact-detection and filtering When calculating the EVI, the Ventica Analytics software only uses breathing recorded from periods of restful sleep. Periods of restless movement, coughing or crying, for example, are automatically filtered out of the full night’s dataset by sophisticated artifact-detection algorithms. Download the clinical booklet Check the evidence for EVI info@ventica.net | Tel. +358 20 730 5511 Copyright 2018 Revenio, / Cookie policy / Privacy policy / Solution / Distributors / EVI - Expiratory Variability Index / References & Studies / Company & Contact / News & Events / Revenio Group Corporation Privacy & Cookies: By continuing to use this website, you agree to their use. To find out more, including how to control cookies, see here: Cookie Policy

MENU Distributors Find your local Ventica sales and service representative Not all products, services or offers are approved or offered in every market and approved labeling and instructions may vary from one country to another. Product specifications are subject to change in design and scope of delivery and as a result of ongoing technical developments. Select country Please contact your local Ventica distributor listed here for more information about Ventica in your language. If there's no Ventica distributor in your area, please contact the Ventica team. Contact us info@ventica.net | Tel. +358 20 730 5511 Copyright 2018 Revenio, / Cookie policy / Privacy policy / Solution / Distributors / EVI - Expiratory Variability Index / References & Studies / Company & Contact / News & Events / Revenio Group Corporation Privacy & Cookies: By continuing to use this website, you agree to their use. To find out more, including how to control cookies, see here: Cookie Policy