Implantable multi-wavelength oximeter sensor
First Claim
1. An implantable multi-wavelength oximetry sensor, comprising:
- an implantable sensor housing defining a window through which light can pass;
a first light source, within said sensor housing, to transmit light having a first wavelength;
a second light source, within said sensor housing, to transmit light having a second wavelength; and
a plurality of prisms within said sensor housing, each prism including a plurality of surfaces;
a dichroic surface formed on a first surface of one of said prisms;
wherein said dichroic surface reflects light of the first wavelength and passes light of the second wavelength;
wherein said first light source is mounted to a second surface of a first one of said prisms directly, or with a first lens therebetween such that said first light source is mounted to one side of said first lens and another side of said first lens is mounted to the second surface of said first one of said prisms;
wherein said second light source is mounted to a second surface of a second one of said prisms directly, or with a second lens therebetween such that said second light source is mounted to one side of said second lens and another side of said second lens is mounted to the second surface of said second one of said prisms; and
wherein said dichroic surface is angled relative to said first light source and said second light source such that light of the first wavelength transmitted by said first light source is reflected to travel in generally a same direction as light of the second wavelength transmitted by said second light source that passes through said dichroic surface; and
wherein said surface on which said dichroic surface is formed is different than both said surface to which said first light source is mounted and said surface to which said second light source is mounted.
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Accused Products
Abstract
Implantable multi-wavelength oximetry sensors, which can be used to monitor a patient'"'"'s blood oxygen saturation level, are described. The sensor includes an implantable sensor housing within which are located a plurality of light sources that each transmits light of a different wavelength. Also within the sensor housing are one or more surfaces that are configured to combine the light from the plurality of light sources into a beam of light for transmission through a portion of the housing (e.g., a window) through which light can exit and enter the housing. Additionally, a light detector is located within the sensor housing, to detect light scattered by blood back into the housing. This description is not intended to be a complete description of, or limit the scope of, the invention. Other features, aspects, and objects of the invention can be obtained from a review of the specification, the figures, and the claims.
63 Citations
27 Claims
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1. An implantable multi-wavelength oximetry sensor, comprising:
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an implantable sensor housing defining a window through which light can pass; a first light source, within said sensor housing, to transmit light having a first wavelength; a second light source, within said sensor housing, to transmit light having a second wavelength; and a plurality of prisms within said sensor housing, each prism including a plurality of surfaces; a dichroic surface formed on a first surface of one of said prisms; wherein said dichroic surface reflects light of the first wavelength and passes light of the second wavelength; wherein said first light source is mounted to a second surface of a first one of said prisms directly, or with a first lens therebetween such that said first light source is mounted to one side of said first lens and another side of said first lens is mounted to the second surface of said first one of said prisms; wherein said second light source is mounted to a second surface of a second one of said prisms directly, or with a second lens therebetween such that said second light source is mounted to one side of said second lens and another side of said second lens is mounted to the second surface of said second one of said prisms; and wherein said dichroic surface is angled relative to said first light source and said second light source such that light of the first wavelength transmitted by said first light source is reflected to travel in generally a same direction as light of the second wavelength transmitted by said second light source that passes through said dichroic surface; and wherein said surface on which said dichroic surface is formed is different than both said surface to which said first light source is mounted and said surface to which said second light source is mounted. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An implantable multi-wavelength oximetry sensor, comprising:
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an implantable sensor housing including a window through which light can pass; a first light source, within said sensor housing, to transmit light having a first wavelength; a second light source, within said sensor housing, to transmit light having a second wavelength; a plurality of prisms within said sensor housing; a first dichroic surface, formed on a surface of a first one of said prisms within said sensor housing, that reflects light of the first wavelength and passes light of the second wavelength; a second dichroic surface, formed on a surface of a second one of said prisms within said sensor housing, that reflects light of the second wavelength and passes light of the first wavelength; wherein said plurality of prisms are bonded together to form a three dimensional structure having inner surfaces where pairs of said prisms meet; wherein said first dichroic surface is formed on one of said inner surfaces and said second dichroic surface is formed on another one of said inner surfaces; wherein said three dimensional structure also has outer surfaces; wherein said first light source is mounted to a said outer surface directly, or with a first lens therebetween; and wherein said second light source is mounted to another said outer surface directly, or with a second lens therebetween; and wherein said first and second dichroic surfaces are angled relative to said first and second light sources such that light of the first wavelength transmitted by said first light source is reflected by said first dichroic surface to travel in generally a same direction as light of the second wavelength transmitted by said second light source that is reflected by said second dichroic surface. - View Dependent Claims (13, 14, 15, 16, 17)
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18. An implantable apparatus, comprising:
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an elongated flexible body configured to be implanted in a blood vessel or a chamber of a heart; an implantable sensor within said elongated flexible body, said implantable sensor including a sensor housing and a window through which light can enter and exit said sensor housing; a plurality of prisms, within said sensor housing, said prisms bonded together to form a three dimensional structure; a plurality of light sources mounted to said three dimensional structure, within said sensor housing, each of which transmits light of a different wavelength; and one or more inner surfaces of said three dimensional structure, within said sensor housing, configured to combine the light from said plurality of light sources into a beam of light for transmission through said window of said sensor housing. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification