Apparatus and method for fluorescent excitation and detection from potentiometric dyes with a single-ended optical fiber
First Claim
1. A method of detecting electrical characteristics of a remote sample situs which comprises:
- treating the remote sample situs with a voltage-sensitive dye providing a single optical fiber and a detector;
delivering light of a sufficient wavelength to cause fluorescent emission of said dye-treated remote sample situs to said dye-treated remote sample situs by means of said single optical fiber; and
receiving fluorescent emission from said dye-treated remote sample situs by said single optical fiber and delivering said received fluorescent emission to said detector for analyzing said received fluorescent emission.
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Accused Products
Abstract
A method of detecting and recording action-potential-related fluorescent changes from a remote tissue situs which has been treated with a voltage-sensitivity dye. The method utilizes a single optical fiber to both direct excitation light to the remote tissue situs and receive emitted fluorescence from the remote tissue situs. The emitted fluorescence from the remote tissue situs is directed to a photomultiplier or photodiode which produces a resulting fluorescence-related signal which is analyzed. The method and related apparatus eliminates signal noise and allows accurate recording and analysis of action-potential-related fluorescent changes.
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Citations
20 Claims
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1. A method of detecting electrical characteristics of a remote sample situs which comprises:
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treating the remote sample situs with a voltage-sensitive dye providing a single optical fiber and a detector; delivering light of a sufficient wavelength to cause fluorescent emission of said dye-treated remote sample situs to said dye-treated remote sample situs by means of said single optical fiber; and receiving fluorescent emission from said dye-treated remote sample situs by said single optical fiber and delivering said received fluorescent emission to said detector for analyzing said received fluorescent emission. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An apparatus for detecting electrical characteristics of a remote sample situs which comprises:
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a light source for generating excitation light having a wavelength of between about 400 to 550 nm; means to pass said excitation light through a single optical fiber to a remote sample situs; means interposed between said light source and said single optical fiber for attenuating said excitation light; means interposed between said attenuating means and said single optical fiber for removing light of an interfering wavelength from said excitation light; a fluorescent detector; means for directing emitted light from said remote sample situs through said single optical fiber to said fluorescent detector; and means positioned between said directing means and said fluorescent detector for removing light of an excitation wavelength from said emitted light. - View Dependent Claims (18, 19, 20)
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Specification