Utilizing lipopolysaccharide in exhaled breath condensate to diagnose gram negative pneumonia
3 Assignments
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Accused Products
Abstract
A method for determining whether a subject has Gram negative bacterial pneumonia based on the presence of lipopolysaccharide in exhaled breath condensate collected from the subject. The collection devices utilized to collect exhaled breath condensate from both spontaneously breathing and mechanically ventilated subjects and the devices utilized to determine whether lipopolysaccharide is present in the collected exhaled breath condensate.
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Citations
66 Claims
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43. A device for collecting exhaled breath condensate from a subject breathing with the assistance of a mechanical ventilation circuit, comprising:
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(a) a mechanical ventilation circuit for facilitating breathing of the subject, wherein the mechanical ventilation circuit includes an expiratory flow tube that serves as a conduit for removing exhaled breath of the subject; (b) a central chamber having an interior, wherein said central chamber may be cooled to a temperature of about 32 degrees Fahrenheit and below to promote condensation; (c) a breath input assembly, disposed at one end of the central chamber, in fluid communication with the interior of the central chamber and the expiratory flow tube, whereby the breath input assembly connects the expiratory flow tube and the central chamber; (d) an exit assembly, disposed at the other end of the central chamber, in fluid communication with the interior of the central chamber; and (e) a vacuum device connected to the exit assembly for collecting exhaled breath condensate from the central chamber.
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44. A breath condensate collection device, comprising:
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(a) a central chamber having an interior and first and second opposing ends; (b) a breath input assembly in fluid communication with the interior of the central chamber; and (c) an exit assembly in fluid communication with the interior of the central chamber, wherein the exit assembly includes a narrow tube, said narrow tube having a fibrous plug disposed therein, said plug being impregnated with a reaction reagent that causes gelation upon exposure to lipopolysaccharide. - View Dependent Claims (45, 46)
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47. A reaction chamber assembly for measuring the concentration of lipopolysaccharide in exhaled breath condensate, comprising:
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(a) a reaction chamber; (b) a delivery port for delivery of the exhaled breath condensate into the reaction chamber; (c) a reaction reagent to react with lipopolysaccharide present in the exhaled breath condensate; and (d) a viewing portion to allow for visible detection of a physical change in the reaction chamber. - View Dependent Claims (48, 49, 50, 51, 52, 53, 54, 55)
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56. A test kit cartridge for detecting the presence of lipopolysaccharide in exhaled breath condensate, comprising:
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(a) a housing; (b) a test module disposed within the housing, said test module utilizing a user-initiated chemical reaction to detect the presence of lipopolysaccharide in the exhaled breath condensate; and (c) a positive control module disposed within the housing adjacent to the test module, said positive control module having lipopolysaccharide disposed herein for showing a definite positive result for the presence of lipopolysaccharide for comparison with the test module. - View Dependent Claims (57, 58, 59, 60, 61, 62, 63, 64, 65, 66)
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Specification