[abstract] WHAT IS THE IDEAL TIME REQUIRED TO GET THE BASELINE READINGS DURING TRANSCUTANEOUS OXYGEN STUDIES IN THE EVALUATION OF HYPOXIC WOUNDS?

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[abstract] WHAT IS THE IDEAL TIME REQUIRED TO GET THE BASELINE READINGS DURING TRANSCUTANEOUS OXYGEN STUDIES IN THE EVALUATION OF HYPOXIC WOUNDS?

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Title: [abstract] WHAT IS THE IDEAL TIME REQUIRED TO GET THE BASELINE READINGS DURING TRANSCUTANEOUS OXYGEN STUDIES IN THE EVALUATION OF HYPOXIC WOUNDS?
Author: Shah, JB; Ram, DM; Sheffield, PJ; Otto, G
Abstract: BACKGROUND: Transcutaneous oxygen (tcpO2) is increasing used to evaluate hypoxia in wounds and to select hyperbaric oxygen therapy (HBO) candidates. Different protocols and time intervals are used for recording baseline values, which need to be standardized. This study compares baseline air values at 10 minutes (Air10), 20 minutes (Air20), and 5 minutes after leg elevation (about 33 minutes into the test) (Air5). MATERIALS AND METHODS: We reviewed tcpO2 studies of 202 patients with lower extremity wounds that were referred during 2002-2003. Each study had 6 electrodes, which we analyzed separately. Total of 1200 measurements were recorded on Excel spreadsheet and then compiled into SPSS database for statistical analysis. Data were plotted and compared by paired t- test across 202 patients for each electrode. RESULTS: Predicting Air20 values based on Air10 was more accurate using regression model: Air20 = 6.602 + 0.922 Air10. Model R2 = 0.898 (very high) and error standard deviation was 5.08. Predicting Air20 using Air10 had approximate 95percent confidence interval of +/-10.15. Paired t-test done on each of the 6 different electrodes comparing Air10 to Air20 showed similar results, ranging from a mean difference of 1.61 to 3.57 mm Hg. Air5, taken five minutes after leg elevation, was more closely related to Air20 than to Air10. CONCLUSIONS: Air20 was always greater than Air10 but the difference was small though statistically significant. Air5 after leg elevation was similar to Air20. The ideal time for baseline tcpO2 was Air20.
Description: Undersea and Hyperbaric Medical Society, Inc. (http://www.uhms.org )
URI: http://archive.rubicon-foundation.org/1701
Date: 2005

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  • UHMS Meeting Abstracts
    This is a collection of the published abstracts from the Undersea and Hyperbaric Medical Society (UHMS) annual meetings.

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