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Bench test assessment of mainstream capnography during high frequency oscillatory ventilation.

Abstract：

:To assess the feasibility, stability and predictability of pCO2 measurement (PETCO2) using a main stream capnograph in a high frequency oscillatory ventilation circuit. A commercially available capnograph was mounted into a high frequency oscillatory ventilator patient circuit, adjustable CO2 flow was introduced into an artificial lung and the output of the CO2 sensor assessed under varying ventilator settings. Influence of oxygen content, pressures, heat and moisture were recorded. A linear relationship between CO2 flow rate and PETCO2 was found. Varying ventilator settings influenced the measurements, but the results for PETCO2 remained within a range of 1.5 mmHg above or under then mean measurement value. Measurements remained stable despite humidification, heat, pressure amplitudes or mean airway pressure changes. From this bench test, we conclude it is feasible to measure PETCO2 using a main stream capnograph during high frequency oscillatory conditions, these measurements were stable during the experiment. Changes in CO2 production or output can be detected. The system may prove to be of clinical value, but further in vivo measurements are warranted.

journal_name

J Clin Monit Comput

journal_title

Journal of clinical monitoring and computing

authors

Hartdorff CM,van Heerde M,Markhorst DG

doi

10.1007/s10877-013-9495-9

subject

Has Abstract

pub_date

2014-02-01 00:00:00

pages

63-6

issue

1

eissn

1387-1307

issn

1573-2614

journal_volume

28

pub_type

杂志文章

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