Document Detail


Comparison of the transcutaneous oxygen and carbon dioxide tension in different electrode locations during general anaesthesia.
MedLine Citation:
PMID:  16824244     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND AND OBJECTIVE: The best place for the electrode of transcutaneous measurement of oxygen tension (tcPO2) and carbon dioxide tension (tcPCO2) during general anaesthesia was investigated in three different locations. METHODS: Fifteen patients for major abdominal surgery in the supine position were studied. The electrode of the TCM4 (Radiometer, Copenhagen, Denmark) was put on the chest, upper arm or forearm. TcPO2, tcPCO2, end-tidal carbon dioxide tension (etCO2), percutaneous oxygen saturation (SaO2), arterial oxygen tension (PaO2 ) and arterial carbon dioxide tension (PaCO2) were simultaneously measured at four different etCO2 concentrations and inhaled oxygen percentages and the location of the electrode was changed to other places to repeat the same measurement. In total, 12 measurements for each patient and 60 measurements for each place were performed. RESULTS: TcPO2 correlated better than SaO2 (R2 = 0.58) with PaO2 (R2 = 0.76), and tcPCO2 correlated well with PaCO2 (R2 = 0.76) and etCO2 (R2 = 0.74) when the electrode was put on the chest, while not on the upper arm or forearm (R2 < 0.5). However, limits of agreement were too big to use tcPO2 (bias, -67.9; limits of agreement, 16.5, -152.3) and tcPCO2 (bias, -0.47; limits of agreement, 8.7, -9.64) as surrogate measures of PaO2 and PaCO2, respectively even when the electrode was put on the chest. CONCLUSIONS: When the electrode was put on the chest, tcPO2 and tcPCO2 might be available as non-invasive monitors of oxygenation and CO2 status during general anaesthesia, while the absolute values were not interchangeable with PaO2 and PaCO2, respectively.
Authors:
T Nishiyama; S Nakamura; K Yamashita
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Publication Detail:
Type:  Comparative Study; Journal Article     Date:  2006-07-07
Journal Detail:
Title:  European journal of anaesthesiology     Volume:  23     ISSN:  0265-0215     ISO Abbreviation:  Eur J Anaesthesiol     Publication Date:  2006 Dec 
Date Detail:
Created Date:  2006-10-17     Completed Date:  2007-02-01     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8411711     Medline TA:  Eur J Anaesthesiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  1049-54     Citation Subset:  IM    
Affiliation:
The University of Tokyo, Faculty of Medicine, Department of Anesthesiology, Tokyo, Japan. nishit-tky@umin.ac.jp
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MeSH Terms
Descriptor/Qualifier:
Aged
Anesthesia, General / instrumentation*,  methods*
Blood Gas Analysis / methods
Blood Gas Monitoring, Transcutaneous / instrumentation*,  methods*
Carbon Dioxide / metabolism*
Electrodes
Humans
Middle Aged
Monitoring, Physiologic / instrumentation,  methods
Oxygen / metabolism*
Respiration, Artificial
Temperature
Chemical
Reg. No./Substance:
124-38-9/Carbon Dioxide; 7782-44-7/Oxygen

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