FLUID ANALYSIS SYSTEM
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Accused Products
Abstract
Systems and method are disclosed for determining a concentration of an analyte in a fluid (e.g., blood). The system can draw blood from a patient and deliver the blood to a sample cell. A particular component of the fluid (e.g., plasma) may be separated and/or positioned such that the concentration of the analyte is measured in the particular component of the fluid (e.g., plasma). The sample cell can include a sample container that has two window pieces. The system can have a fluid passage having a tip configured to mate with a multi-lumen catheter without leaking. The multi-lumen catheter can have proximal and distal ports. A fluid pressure system can be configured to periodically draw fluid from vasculature through a proximal intravascular opening and the proximal port while maintaining a low pressure and/or flow rate to thereby reduce risk of reversing the fluid flow in a vessel and drawing infusates upstream into another intravascular opening.
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Citations
44 Claims
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21. A cuvette comprising:
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a first window piece that is configured to be transparent to light emitted by an optical measurement system for measuring the concentration of an analyte in a sample of bodily fluid in the cuvette; a second window piece that is configured to be transparent to the light emitted by the optical measurement system; a spacer positioned between the first window piece and the second window piece to provide a gap between the first window piece and the second window piece, wherein the gap forms a sample chamber between the first window piece and the second window piece, and wherein the sample chamber is configured to receive the sample of bodily fluid from a fluid handling system; a first clamping element; and a second clamping element, wherein the first and second clamping elements are positioned on opposite outer sides of the first and second window pieces, wherein the first and second clamping elements are secured to each other to provide support to the first and second window pieces, wherein the first and second clamping elements are configured to permit the light emitted by the fluid measurement system to pass through the sample chamber of the cuvette. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A cuvette comprising:
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a first transparent window piece; a second transparent window piece; a spacer positioned between the first window piece and the second window piece to provide a gap between the first window piece and the second window piece, wherein the gap forms a sample chamber between the first window piece and the second window piece, and wherein the sample chamber is configured to hold a fluid sample; a first clamping element; and a second clamping element, wherein the first and second clamping elements are positioned on opposite sides of the first and second window pieces, wherein the first and second clamping elements are secured to each other to provide support to the first and second window pieces; wherein the cuvette is configured to provide an optical pathway that extends through the first window piece, through the sample chamber, and through the second window piece. - View Dependent Claims (36, 37, 38, 39, 40)
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41. A fluid analysis system comprising:
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a fluid handling system that includes a patient end configured to provide access to a bodily fluid of a patient, wherein the fluid handling system is configured to draw a sample of bodily fluid from the patient through the patient end; a sample preparation system in fluid communication with the fluid handling system, wherein the sample preparation system is configured to receive the sample of bodily fluid from the fluid handling system, and wherein the sample preparation system is configured to lyse cells in the sample of bodily fluid; and a fluid measurement system configured to measure the concentration of an analyte in the sample of bodily fluid after the cells have been lysed. - View Dependent Claims (42, 43, 44)
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Specification