Journal article
Ventilatory Frequency Influences Accuracy of End-Tidal CO2 Measurements Analysis of Seven Capnometers
Anesthesia and analgesia, Vol.67(9), pp.884-886
09/1988
DOI: 10.1213/00000539-198809000-00016
PMID: 3137837
Abstract
An accurate high-frequency response is mandatory when end-tidal CO2 (PETCO2) is monitored during pediatric general anesthesia. The purpose of this study was to assess the accuracy of six infrared-based capnometers and one multiplexed mass spectrometer available at our institution at increasing frequency. Capnometers studied were the Datascope Accucap, Hewlett-Packard 47210A capnometer, Narkomed 3 Capnomed, Novametrix Capnogard model 1250, Perkin-Elmer Advantage, Puritan-Bennett Datex CO2 monitor, and Traverse Medical Monitor model 2200 capnometer. Changes in CO2 concentration were generated by a solenoid valve switching between 100% O2 and 7% CO2 in O2. Frequencies, 8-101 cycles/min were chosen to stimulate a range that might be generated by children during general endotracheal anesthesia. At every rate the displayed PETCO2 was recorded. Differences in displayed PETCO2 from known CO2 ranged from -16.4 to +6.6. At or below frequencies of 31 cycles/min, four capnometers overreported and three underreported PETCO2. At frequencies above 31 cycles/min, six capnometers underreported and one overreported PETCO2. Errors may be clinically significant if they influence ventilator settings for patients.
Details
- Title: Subtitle
- Ventilatory Frequency Influences Accuracy of End-Tidal CO2 Measurements Analysis of Seven Capnometers
- Creators
- Robert P FromFranklin L Scamman
- Resource Type
- Journal article
- Publication Details
- Anesthesia and analgesia, Vol.67(9), pp.884-886
- DOI
- 10.1213/00000539-198809000-00016
- PMID
- 3137837
- ISSN
- 0003-2999
- eISSN
- 1526-7598
- Language
- English
- Date published
- 09/1988
- Academic Unit
- Anesthesia
- Record Identifier
- 9984006400502771
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