Fiber optic P.sub.O.sbsb.2 probe
First Claim
1. A probe for determining PO.sbsb.2 in the blood or tissue of a living animal, comprising:
- an oxygen-porous jacket of a size sufficiently small to be passed into a blood vessel;
a porous dye support carried within said jacket, said dye support and said jacket having sufficiently high permeability to permit the exposure of individual dye molecules carried thereby to oxygen collision;
a non-toxic luminescent dye carried by said porous dye support, said dye being excitable by visible light, having and sufficiently great stability to aging to permit storage without substantial change of dye characteristics, and being oxygen quenching-sensitive; and
fiber optic means to pass excitation light to said dye within said jacket and collect luminescence therefrom.
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Accused Products
Abstract
A fiber optic probe to be implanted in human body tissue for physiologic studies involving measurement and monitoring of the partial pressure of gaseous oxygen in the blood stream, which is coursing through a particular blood vessel in the body. The use of the probe is based on the principle of dye fluorescence oxygen quenching. Structurally the probe comprises two 150-micrometer strands of plastic optical fiber ending in a section of porous polymer tubing serving as a jacket or envelope for the fibers. The tubing is packed with a suitable fluorescent light-excitable dye placed on a porous adsorptive particulate polymeric support. The tubing or jacket is usually made of a hydrophobic, gas-permeable commercial material, known as Celgard, but other suitable hydrophobic gas-permeable material could be used for such structure. The fiber optic probe of the invention is of very small size and flexible so that it can easily be threaded through small blood vessels which are located in a variety of tissues of the body.
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Citations
14 Claims
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1. A probe for determining PO.sbsb.2 in the blood or tissue of a living animal, comprising:
- an oxygen-porous jacket of a size sufficiently small to be passed into a blood vessel;
a porous dye support carried within said jacket, said dye support and said jacket having sufficiently high permeability to permit the exposure of individual dye molecules carried thereby to oxygen collision;
a non-toxic luminescent dye carried by said porous dye support, said dye being excitable by visible light, having and sufficiently great stability to aging to permit storage without substantial change of dye characteristics, and being oxygen quenching-sensitive; and
fiber optic means to pass excitation light to said dye within said jacket and collect luminescence therefrom. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- an oxygen-porous jacket of a size sufficiently small to be passed into a blood vessel;
Specification