Journal Article10.1097/00003246-197809000-00013
A flowmeter for respiratory monitoring.
26
TL;DR: A variable-orifice pneumotachograph is described, specifically designed for monitoring respirator patients and sacrifices some of the accuracy of a laminar flow (Fleisch) type device to gain greatly improved immunity to artefacts caused by airway water.
read more
Abstract: A variable-orifice pneumotachograph is described. It has a resistance that is relatively constant over a flow range from 0.1 to 2.5 liter/sec so it puts out a differential pressure signal that is directly proportional to flow. It is specifically designed for monitoring respirator patients and sacrifices some of the accuracy of a laminar flow (Fleisch) type device to gain greatly improved immunity to artefacts caused by airway water.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Flow measurement in mechanical ventilation: A review
TL;DR: The most promising emerging approaches for flowmeters design (i.e., fiber optic technology and three dimensional micro-fabrication) are briefly reviewed showing their potential for this application.
126
Calibration of seven ICU ventilators for mechanical ventilation with helium-oxygen mixtures
Didier Tassaux,Philippe Jolliet,Jean-Marc Thouret,Jean Roeseler,René Dorne,Jean-Claude Chevrolet +5 more
TL;DR: The study evaluated seven intensive care unit (ICU) ventilators with helium-oxygen (HeO2), using a lung model, to develop correction factors for the safe use of HeO2 that can be applied to most ventilations.
102
Evaluation of thoracic mechanics in the ventilated patient part 1: Primary measurements
TL;DR: This review focuses on techniques for assessing effort intensity, the pattern and rhythm of the breathing cycle, and the physical properties of the lung and chest wall during mechanical ventilation.
43
A Simple and Accurate Indirect Calorimetry System for Assessment of Resting Energy Expenditure
C. Alvin Head,Clifford McManus,Susan Seitz,Gilbert D. Grossman,Gerald W. Staton,Steven B. Heymsfield +5 more
TL;DR: An indirect calorimetry system was assembled from three readily available major components: a digital pneumotachograph, an oxygen analyzer, and a carbon dioxide analyzer to provide an accurate measure of resting energy expenditure.
40
Comparison of six methods to calculate airway resistance during mechanical ventilation in adults.
Dean Hess,Ted Tabor +1 more
TL;DR: Methods that evaluate expiratory resistance (Comroe, Bergman, and Jonson) produce higher values than methods that evaluate inspiratory Resistance (Suter and Neergard) or a combination of inspiratory and expiratories resistance (Krieger).
23