High-Frequency Percussive Ventilation: Pneumotachograph Validation and Tidal Volume Analysis

Abstract

INTRODUCTION: High-frequency percussive ventilation (HFPV) is an increasingly used mode of mechanical ventilation, for which there is no proven real-time means of measuring delivered tidal volume (VT). OBJECTIVE: To validate a pneumotachograph for HFPV and then exploit flowsensor data to describe the behavior of both low-frequency and high-frequency breaths. METHODS: Sensor performance was gauged during changes in high-frequency and low-frequency rate and ratio, mean airway pressure, oxygen concentration, heated or heated-humidified gas flow, and endotracheal tube diameter. Glass bottle (adiabatic VT) and test lung (adiabatically derived low-frequency VT) based adiabatic conditions provided both an initial source for analog signal calibration and an accepted standard comparator to flow-sensor measurement of high-frequency and low-frequency (flow-sensor-derived) VT), respectively. RESULTS: Pneumotachography proved accurate and precise over an array of tested settings and conditions when analyzing both high-frequency and low-frequency breaths.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2010
Accession Number
ADA524184

Entities

People

  • Patrick F. Allan

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Accuracy
  • Airway Management
  • Algorithms
  • Analog Signals
  • Barometric Pressure
  • Calibration
  • Computers
  • Diameters
  • Equations
  • Frequency
  • Gas Flow
  • Measurement
  • Pressure Transducers
  • Respiratory Physiological Phenomena
  • United States
  • Validation
  • Ventilation

Readers

  • Marine Mammal Biology
  • Systems Analysis and Design
  • Wave Propagation and Nonlinear Chaotic Dynamics.