Airflow-based PCO2 monitoring delivers O2 and removes CO2 from the monitored environment

Robert Vincent; Brian Freeman; Eric Weatherford; Larhee Henderson; Charisse Buising; Piper Wall

doi:10.1097/00024382-200208000-00018

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Airflow-based PCO2 monitoring delivers O2 and removes CO2 from the monitored environment

Journal article

Open access

Peer reviewed

Airflow-based PCO2 monitoring delivers O2 and removes CO2 from the monitored environment

Robert Vincent, Brian Freeman, Eric Weatherford, Larhee Henderson, Charisse Buising and Piper Wall

Shock (Augusta, Ga.), Vol.18(2), pp.193-194

2002

DOI: 10.1097/00024382-200208000-00018

PMID: 12166786

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Abstract

Previous investigation has suggested that the use of airflow-based gastrointestinal intraluminal PCO2 (GI PiCO2) monitoring systems may affect the local tissue microenvironment, making it not representative of the organ system as a whole. Therefore, we investigated the effects of using an airflow-based PCO2 monitoring system in a sealed environment. A 250-mL Erlenmeyer flask was filled with 10% CO2/90% N2 and was sealed with probes in place. Using a fiber-optic (Neotrend®, Diametrix Medical, St. Paul, MN) system, the PCO2 and PO2 were continuously monitored with and without the airflow-based (Tonocap®, Tonometrics, Datex-Ingstrom, Helsinki, Finland) system operating. PCO2 and PO2 remained constant when the airflow-based system was not in operation. PCO2 decreased 25.3 mmHg and PO2 increased 30 mmHg from a starting value of 0 mmHg when the airflow-based system was in operation for 12 h. The use of airflow-based methods for determining GI PiCO2 may influence the values obtained. Nonsample removing techniques such as fiber-optic methods for monitoring GI PiCO2 are preferable because they neither deliver O2 to nor remove CO2 from the local microenvironment.

Biological and medical sciences

Investigative techniques, diagnostic techniques (general aspects)

Medical sciences

Miscellaneous. Technology

Pathology. Cytology. Biochemistry. Spectrometry. Miscellaneous investigative techniques

Details

Title: Subtitle: Airflow-based PCO2 monitoring delivers O2 and removes CO2 from the monitored environment
Creators: Robert Vincent - Drake University
Brian Freeman - Drake University
Eric Weatherford - Drake University
Larhee Henderson - Drake University
Charisse Buising - Drake University
Piper Wall - Iowa Methodist Medical Center
Resource Type: Journal article
Publication Details: Shock (Augusta, Ga.), Vol.18(2), pp.193-194
Publisher: BioMedical Press
DOI: 10.1097/00024382-200208000-00018
PMID: 12166786
ISSN: 1073-2322
eISSN: 1540-0514
Language: English
Date published: 2002
Academic Unit: Endocrinology and Metabolism; Internal Medicine
Record Identifier: 9984359792902771

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