Probe For Measuring the Oxygen Content in Biological Tissue, and Catheter With Such a Probe
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United States of America Patent
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Issued Date -
Aug 14, 2008
app pub date -
May 17, 2006
filing date -
May 25, 2005
priority date (Note) -
Abandoned
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Abstract
A probe is used for measuring the oxygen content in biological tissue. The probe comprises at least one optical fibre, which can be proximally optically coupled to a light source on the one hand and to a light sensor on the other. An oxygen-sensitive dye is arranged on and optically coupled to a distal end face of the fibre. A distal fibre portion, including the distal end face, is enclosed together with the dye by an oxygen-permeable, liquid-impermeable membrane which, in the enclosed region, defines a gas compartment surrounding the distal end face with the dye. The probe is a component of a catheter which also comprises a temperature sensor and preferably a pressure sensor. The result is a probe in which the sensitivity of the fibre to disruptive environmental influences at the measuring location is reduced and the scope for interpreting the measurement results is improved.
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