TrueFlow Technology - Where's the proof?

TrueFlow Technology maintains stability throughout its lifetime of use, supported by rigorous studies validating its durability and reliability.

Accuracy and Quality of Spirometry in Primary Care Offices #

Authors: Matthew J. Hegewald, Heather M. Gallo, and Emily L. Wilson

Source: https://www.atsjournals.org/doi/10.1513/AnnalsATS.201605-418OC

Objective: Spirometry is necessary for the optimal management of patients with respiratory disease. The quality of spirometry performed in the primary care setting has been inconsistent. This study aimed to evaluate spirometer accuracy, determine the clinical significance of inaccurate spirometers, and assess the quality of spirograms obtained in primary care offices.

CONCLUSION: In this study the EasyOne, utilizing TrueFlow technology, was the only spirometer to meet ATS accuracy criteria in a 2016 study of office spirometers. Also noted in the study was that the EasyOne was the only spirometer tested that had evidence to support its claim of accuracy over time with its calibration-free technology.

Four-year calibration stability of the EasyOne portable spirometer #

Authors: Gwen S Skloot MD, Nicole T Edwards MSc, and Paul L Enright MD

Source: https://rc.rcjournal.com/content/respcare/55/7/873.full.pdf

Objective: The EasyOne TrueFlow ultrasonic flow-sensing spirometer was chosen for use by the clinical centers at the 2002 inception of the World Trade Center Worker and Volunteer Medical Screening Program. The screening program quality control procedure required that the expiratory and inspiratory volume accuracy of each spirometer be checked every day of testing, and the flow accuracy (linearity) checked every week. Over 5,000 calibration-check results (4,109 single-flow and 1,189 multi-flow) were accumulated from a total of 34 spirometers during the period February 2003 through March 2007.

CONCLUSION: The EasyOne retained inhalation and exhalation volume accuracy of better than 3% for at least 4 years. Routine multi-flow volume calibration checks may not be necessary with the EasyOne. The acceptability and repeatability of patient efforts should be the primary focus of quality-assurance programs with spirometers that have been demonstrated to remain accurate for long periods.

The long-term stability of portable spirometers used in a multinational study of the prevalence of chronic obstructive pulmonary disease #

Authors: Rogelio Pérez-Padilla, Juan Carlos Vázquez-García, María Nelly Márquez, José Roberto B Jardim, Julio Pertuzé, Carmen Lisboa, Adriana Muiño, María Victorina López, Carlos Tálamo, María Montes de Oca, Gonzalo Valdivia, Ana Maria B Menezes; Latin American COPD Prevalence Study (PLATINO) Team

Source: https://pubmed.ncbi.nlm.nih.gov/17005063/

Objective: We report the performance of an ultrasound-based portable spirometer (EasyOne) used in a population-based survey of the prevalence of chronic obstructive pulmonary disease, conducted in 5 Latin American cities: São Paulo, Brazil; México City, México; Montevideo, Uruguay; Santiago, Chile; and Caracas, Venezuela (the Latin American COPD Prevalence Study [PLATINO]). During the survey period (which ranged from 3 months to 6 months in the various locations) we collected daily calibration data from the 70 EasyOne spirometers used in the 5 survey cities. The calibrations were conducted with a 3-L syringe, and the calibration data were stored in the spirometer’s database.

CONCLUSION: In these 70 EasyOne spirometers neither calibration nor linearity changed during the study.