Abstract:
INTRODUCTION AND METHODS:Dynamic fluorescence quenching is a technique that may overcome some of the limitations associated with measurement of tissue partial oxygen tension (PO2). We compared this technique with a polarographic Eppendorf needle electrode method using a saline tonometer in which the PO2 could be controlled. We also tested the fluorescence quenching system in a rodent model of skeletal muscle ischemiahypoxia. RESULTS:Both systems measured PO2 accurately in the tonometer, and there was excellent correlation between them (r(2) = 0.99). The polarographic system exhibited proportional bias that was not evident with the fluorescence method. In vivo, the fluorescence quenching technique provided a readily recordable signal that varied as expected. DISCUSSION:Measurement of tissue PO2 using fluorescence quenching is at least as accurate as measurement using the Eppendorf needle electrode in vitro, and may prove useful in vivo for assessment of tissue oxygenation.
journal_name
Crit Carejournal_title
Critical care (London, England)authors
Shaw AD,Li Z,Thomas Z,Stevens CWdoi
10.1186/cc1457keywords:
subject
Has Abstractpub_date
2002-02-01 00:00:00pages
76-80issue
1eissn
1364-8535issn
1466-609Xjournal_volume
6pub_type
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