Catheter head
First Claim
Patent Images
1. A catheter head comprising:
- at least one waveguide for directing radiation to a blood detection volume and for directing of return radiation to a spectroscopic analyzer that determines at least one property of the blood;
an objective lens for receiving the return radiation from the blood detection volume;
a housing, the detection volume being located inside a cavity of the housing, the housing having a sidewall with an opening therethrough to enable the blood to flow into the cavity;
a concave mirror at least partially forming an end of the cavity opposite to an end of the waveguide, the concave mirror being positioned relative to the at least one waveguide such that radiation emitted from the at least one waveguide;
(1) in part is scattered by the blood, which scattered radiation in part is reflected by the blood back to the end of the at least one waveguide and which scattered radiation in part passes through the blood in the cavity to the concave mirror, is reflected by the concave mirror, and passes back through the blood in the cavity to the end of the waveguide and(2) in part passes through the blood in the cavity is reflected by the concave mirror back in to the blood in the cavity and is scattered by the blood and the scattered radiation passes to the end of the at least one waveguide.
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Accused Products
Abstract
The present invention relates to a catheter head comprising: means (104, 108; 306, 304; 320; 322; 326; 338) for directing of radiation to a blood detection volume (220; 310), means (104, 108; 306, 304; 320; 322; 326; 332, 334, 330; 338) for receiving of return radiation from the blood detection volume, means (104; 306; 330) for transmitting of the return radiation to means (122) for analysis of the return radiation for determination of at least one property of the blood.
17 Citations
19 Claims
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1. A catheter head comprising:
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at least one waveguide for directing radiation to a blood detection volume and for directing of return radiation to a spectroscopic analyzer that determines at least one property of the blood; an objective lens for receiving the return radiation from the blood detection volume; a housing, the detection volume being located inside a cavity of the housing, the housing having a sidewall with an opening therethrough to enable the blood to flow into the cavity; a concave mirror at least partially forming an end of the cavity opposite to an end of the waveguide, the concave mirror being positioned relative to the at least one waveguide such that radiation emitted from the at least one waveguide; (1) in part is scattered by the blood, which scattered radiation in part is reflected by the blood back to the end of the at least one waveguide and which scattered radiation in part passes through the blood in the cavity to the concave mirror, is reflected by the concave mirror, and passes back through the blood in the cavity to the end of the waveguide and (2) in part passes through the blood in the cavity is reflected by the concave mirror back in to the blood in the cavity and is scattered by the blood and the scattered radiation passes to the end of the at least one waveguide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A catheter head comprising:
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at least one waveguide for directing of radiation to a bodily fluid detection volume and for directing of return radiation to a spectroscopic analyzer that determines at least one property of the bodily fluid; an objective lens for receiving of return radiation from the detection volume; and a housing, the detection volume being located along a channel through the housing, the channel having at least two openings and defining a non-linear path through the housing, the detection volume being defined in the non-linear channel. - View Dependent Claims (11, 12)
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13. A method of in vivo analysis of blood, the method comprising:
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positioning a catheter head in blood in vivo; capturing a plasma portion of the blood in a fluid detection volume of a housing of the catheter head, including preventing at least one of red and white blood cells from entering the fluid detection volume; generating a Raman excitation radiation; guiding the Raman excitation radiation through the catheter head into the fluid detection volume to produce scattered radiation; reflecting the scattered radiation using a dichroic mirror; and guiding the scattered radiation through the catheter head to a spectroscopic analyzer to determine at least one property of the plasma portion of the blood. - View Dependent Claims (14, 15)
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16. A method of in vivo analysis of a bodily fluid, the method comprising:
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positioning in vivo a catheter head in proximity to the bodily fluid; drawing a portion of the bodily fluid through a housing along a non-linear path; generating a Raman excitation radiation; guiding the Raman excitation radiation through the catheter head into a fluid detection volume defined in the non-linear path to produce scattered radiation; and guiding the scattered radiation through the catheter head to a spectroscopic analyzer to determine at least one property of the bodily fluid. - View Dependent Claims (17, 18, 19)
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Specification