Quality evaluation of a continuous flow neonatal ventilator as an instrument for measuring respiratory parameters

Paolo Cappa, Salvatore Andrea Sciuto, Sergio Silvestri

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Among many patient respiratory parameters, pulmonary ventilators for intensive care provide information on patient resistance, compliance and "work of breathing" values calculated from pressure and flow data patterns according to the widely utilized Mead and Whittenberger method. The effects induced by the breathing circuit and analogue filtering of the ventilator measuring system are experimentally investigated during controlled ventilation. Three main phenomena are observed: (a) errors in calculation of resistance and compliance due to filtering of pressure and flow waveforms; (b) the presence of pressure oscillations at the beginning of inspiration and expiration phases; and (c) the phase shift between pressure and flow waveforms. The experimental evaluation of the measuring system of a neonatal ventilator is then conducted and: (a) a delay in pressure and flow measurement synchronization equal to (22 ± 2) ms is evaluated; moreover, (b) a difference between the values provided by the ventilator and those measured by the reference experimental setup on respiratory parameters such as the compliance, resistance and work of breathing that lies in the range of (7 - 16) % of reading is observed.

Original languageEnglish
Title of host publicationProceedings of the IASTED International Conference on Biomedical Engineering
EditorsB. Tilg
Pages551-556
Number of pages6
Publication statusPublished - 2004
EventProceedings of the IASTED International Conference on Biomedical Engineering - Innsbruck, Austria
Duration: Feb 16 2004Feb 18 2004

Other

OtherProceedings of the IASTED International Conference on Biomedical Engineering
CountryAustria
CityInnsbruck
Period2/16/042/18/04

Keywords

  • Breathing circuit
  • Pulmonary ventilation
  • Respiratory system parameters

ASJC Scopus subject areas

  • Engineering(all)

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