Volatile biomarkers for analysis of hepatic disorders
First Claim
Patent Images
1. A test system for detecting a hepatic disorder in a mammal, the test system comprising:
- a) a chamber for receiving respiratory gas from the mammal; and
b) a monitor for detecting at least one volatile organic molecule in the respiratory gas and for outputting the concentration of at least one of the detected organic molecules, wherein the monitor comprises or is interfaced with at least one of;
i) a computational system adapted to correlate the concentration of at least one of the detected organic molecules (test value) to at least one of a pre-determined control or analytical value, or ii) a carbon dioxide analyzer for correcting the concentration of at least one of the detected molecules to an alveolar concentration of carbon dioxide.
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Abstract
The present invention features test systems and methods for detecting a hepatic disorder in a mammal and especially a primate. Preferred use of the invention involves staging the hepatic disorder in a human patient.
88 Citations
56 Claims
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1. A test system for detecting a hepatic disorder in a mammal, the test system comprising:
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a) a chamber for receiving respiratory gas from the mammal; and
b) a monitor for detecting at least one volatile organic molecule in the respiratory gas and for outputting the concentration of at least one of the detected organic molecules, wherein the monitor comprises or is interfaced with at least one of;
i) a computational system adapted to correlate the concentration of at least one of the detected organic molecules (test value) to at least one of a pre-determined control or analytical value, or ii) a carbon dioxide analyzer for correcting the concentration of at least one of the detected molecules to an alveolar concentration of carbon dioxide. - View Dependent Claims (2, 32, 33, 34, 35, 36, 51, 52, 53, 54, 55)
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3. A test system for detecting and staging a hepatic disorder in a mammal, the test system comprising:
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a) a gas collection apparatus for receiving respiratory gas from the mammal and for outputting volatile organic molecules in the gas, b) a chromatography system for receiving the volatile organic molecules from the apparatus and for detecting volatile organic molecules comprising at least one of hydrocarbon or organosulfur molecule; and
c) a computational system adapted to process output from the chromatography system, wherein the computational system performs the following steps;
i) determine the concentration of volatile organic molecules detected by the chromatography system, ii) correlate the concentration of at least one of the detected organic molecules to at least one of a pre-determined analytical or control value for the molecule, and iii) output results. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 17, 18)
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13. A method for detecting and staging a hepatic disorder in a mammal, the method comprising:
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a) collecting respiratory gas from the mammal, b) determining the concentration of at least one volatile organic molecule in the respiratory gas; and
c) correlating the concentration of the volatile organic molecule to presence and stage of the hepatic disorder in the mammal, the method further comprising correcting the concentration of the organic molecule to an alveolar concentration of carbon dioxide. - View Dependent Claims (14, 15, 16, 56)
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19. A method for detecting and staging a hepatic disorder in a mammal, the method comprising:
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a) collecting respiratory gas from the mammal into a gas collection apparatus, b) separating the respiratory gas on a first gas chromatograph comprising a first detector capable of detecting hydrocarbon, c) detecting ethane in the released molecules, d) separating the respiratory gas on a second gas chromatograph comprising a second detector capable of detecting organosulfur molecules, e) detecting at least one of carbonyl sulfide or dimethyl sulfide in the released molecules; and
f) correlating the concentration of at least one of ethane, carbonyl sulfide or dimethyl sulfide to presence and stage of the hepatic system disorder in the mammal. - View Dependent Claims (20, 21, 22, 23)
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24. A method for detecting a hepatic disorder in a mammal, the method comprising:
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a) collecting respiratory gas from the mammal, b) determining concentration of carbonyl sulfide in the respiratory gas; and
c) correlating the concentration of carbonyl sulfide to the presence of the hepatic disorder in the mammal, the method further comprising correcting the concentration of carbonyl sulfide to an alveolar concentration of carbon dioxide. - View Dependent Claims (25, 26, 27, 28)
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29. A method for detecting hepatocellular injury or a biliary tract disorder in a mammal, the method comprising:
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a) collecting respiratory gas from the mammal, b) determining concentration of at least one of ethane, carbonyl sulfide, or dimethyl sulfide in the respiratory gas; and
e) correlating the concentration of at least one of the ethane, carbonyl sulfide or dimethyl sulfide to the presence of the hepatocellular injury or the biliary tract disorder in the mammal, the method further comprising correcting the concentration of the ethane, carbonyl sulfide or dimethyl sulfide to an alveolar concentration of carbon dioxide. - View Dependent Claims (30, 31)
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37. A method for detecting and staging a hepatic disorder in a mammal, the method comprising:
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a) collecting respiratory gas from the mammal, b) determining the concentration of at least one volatile organic molecule in the respiratory gas; and
c) correlating the concentration of the volatile organic molecule to presence and stage of the hepatic disorder in the mammal, wherein the respiratory gas is collected into a gas collection apparatus having a sampling volume of from between about 0.01 liters to 20 liters, the gas collection apparatus comprising a chamber comprising a polymeric adsorbent, wherein the method further comprises cooling the chamber from between about −
100°
C. to −
150°
C. to concentrate the volatile organic molecules in the adsorbent.
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38. A method for detecting and staging a hepatic disorder in a mammal, the method comprising:
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a) collecting respiratory gas from the mammal, b) determining the concentration of at least one volatile organic molecule in the respiratory gas; and
c) correlating the concentration of the volatile organic molecule to presence and stage of the hepatic disorder in the mammal, wherein the respiratory gas is collected into a gas collection apparatus having a sampling volume of from between about 0.01 liters to 20 liters, the gas collection apparatus comprising a chamber comprising a polymeric adsorbent, wherein the method further comprises cooling the chamber from between about −
100°
C. to −
150°
C. to concentrate the volatile organic molecules in the adsorbent and heating the chamber from between about 100°
C. to 200°
C. to release the concentrated volatile organic molecules therefrom.
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39. A method for detecting and staging a hepatic disorder in a mammal, the method comprising:
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a) collecting respiratory gas from the mammal, b) determining the concentration of at least one volatile organic molecule in the respiratory gas; and
c) correlating the concentration of the volatile organic molecule to presence and stage of the hepatic disorder in the mammal, wherein the correlation step further comprises correcting the concentration of the organic molecule to an alveolar concentration of carbon dioxide.
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40. A method for detecting and staging a hepatic disorder in a mammal, the method comprising:
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a) collecting respiratory gas from the mammal, b) determining the concentration of at least one volatile organic molecule in the respiratory gas; and
c) correlating the concentration of the volatile organic molecule to presence and stage of the hepatic disorder in the mammal, wherein the correlating step further comprises comparing the concentration to a pre-determined analytical value indicative of presence and stage of the hepatic disorder in the mammal.
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41. A method for detecting and staging a hepatic disorder in a mammal, the method comprising:
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a) collecting respiratory gas from the mammal, b) determining the concentration of at least one volatile organic molecule in the respiratory gas; and
c) correlating the concentration of the volatile organic molecule to presence and stage of the hepatic disorder in the mammal, wherein the correlating step further comprises comparing the concentration to a pre-determined analytical value indicative of presence and stage of the hepatic disorder in the mammal and the pre-determined analytical value is the mean concentration of the organic molecule in respiratory gas collected from mammals suffering from the presence and stage of the hepatic disorder.
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42. A method for detecting and staging a hepatic disorder in a mammal, the method comprising:
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a) collecting respiratory gas from the mammal, b) determining the concentration of at least one volatile organic molecule in the respiratory gas; and
c) correlating the concentration of the volatile organic molecule to presence and stage of the hepatic disorder in the mammal, wherein the correlating step further comprises comparing the concentration to a pre-determined control value indicative of normal hepatic function.
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43. A method for detecting and staging a hepatic disorder in a mammal, the method comprising:
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a) collecting respiratory gas from the mammal, b) determining the concentration of at least one volatile organic molecule in the respiratory gas; and
c) correlating the concentration of the volatile organic molecule to presence and stage of the hepatic disorder in the mammal, wherein the correlating step further comprises comparing the concentration to a pre-determined control value indicative of normal hepatic function and the control value is the mean concentration of the organic molecule in respiratory gas collected from normal mammals.
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44. A method for detecting and staging a hepatic disorder in a mammal, the method comprising:
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a) collecting respiratory gas from the mammal, b) determining the concentration of at least one volatile organic molecule in the respiratory gas; and
c) correlating the concentration of the volatile organic molecule to presence and stage of the hepatic disorder in the mammal, wherein the correlating step further comprises comparing the concentration to a pre-determined analytical value indicative of presence and stage of the hepatic disorder in the mammal, the correlating step further comprising performing a parametric test between the concentration of the detected organic molecule and the pre-determined analytical or control value.
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45. A method for detecting a hepatic disorder in a mammal, the method comprising:
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a) collecting respiratory gas from the mammal, b) determining concentration of carbonyl sulfide in the respiratory gas; and
c) correlating the concentration of carbonyl sulfide to the presence of the hepatic disorder in the mammal, wherein prior to determining the concentration, the respiratory gas is separated on a chromatographic system capable of detecting hydrocarbon and organosulfur molecules, the chromatography system comprising a pair of detectors for detecting the hydrocarbon or organosulfur molecules and further wherein the respiratory gas is collected into a gas collection apparatus having a sampling volume of from between about 0.01 liters to 20 liters, the gas collection apparatus comprising a chamber comprising a polymeric adsorbent, the method further comprising cooling the chamber from between about −
100°
C. to −
150°
C. to concentrate the volatile organic molecules in the adsorbent.
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46. A method for detecting a hepatic disorder in a mammal, the method comprising:
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a) collecting respiratory gas from the mammal, b) determining concentration of carbonyl sulfide in the respiratory gas; and
c) correlating the concentration of carbonyl sulfide to the presence of the hepatic disorder in the mammal, wherein prior to determining the concentration, the respiratory gas is separated on a chromatographic system capable of detecting hydrocarbon and organosulfur molecules, the chromatography system comprising a pair of detectors for detecting the hydrocarbon or organosulfur molecules and further wherein the respiratory gas is collected into a gas collection apparatus having a sampling volume of from between about 0.01 liters to 20 liters, the gas collection apparatus comprising a chamber comprising a polymeric adsorbent, the method further comprising cooling the chamber from between about −
100°
C. to −
150°
C. to concentrate the volatile organic molecules in the adsorbent and heating the chamber from between about 100°
C. to 200°
C. to release the concentrated volatile organic molecules therefrom.
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47. A method for detecting hepatocellular injury or a biliary tract disorder in a mammal, the method comprising:
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a) collecting respiratory gas from the mammal, b) determining concentration of at least one of ethane, carbonyl sulfide, or dimethyl sulfide in the respiratory gas; and
c) correlating the concentration of at least one of the ethane, carbonyl sulfide or dimethyl sulfide to the presence of the hepatocellular injury or the biliary tract disorder in the mammal, wherein prior to determining the concentration, the respiratory gas is separated on a chromatographic system capable of detecting hydrocarbon and organosulfur molecules, the chromatography system comprising a pair of detectors for detecting the hydrocarbon or organosulfur molecules and further wherein the respiratory gas is collected into a gas collection apparatus having a sampling volume of from between about 0.01 liters to 20 liters.
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48. A method for detecting hepatocellular injury or a biliary tract disorder in a mammal, the method comprising:
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a) collecting respiratory gas from the mammal, b) determining concentration of at least one of ethane, carbonyl sulfide, or dimethyl sulfide in the respiratory gas; and
c) correlating the concentration of at least one of the ethane, carbonyl sulfide or dimethyl sulfide to the presence of the hepatocellular injury or the biliary tract disorder in the mammal, wherein prior to determining the concentration, the respiratory gas is separated on a chromatographic system capable of detecting hydrocarbon and organosulfur molecules, the chromatography system comprising a pair of detectors for detecting the hydrocarbon or organosulfur molecules and further wherein the respiratory gas is collected into a gas collection apparatus having a sampling volume of from between about 0.01 liters to 20 liters, the gas collection apparatus comprising a chamber comprising a polymeric adsorbent and the method further comprises cooling the chamber from between about −
100°
C. to −
150°
C. to concentrate the volatile organic molecules in the adsorbent.
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49. A method for detecting hepatocellular injury or a biliary tract disorder in a mammal, the method comprising:
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a) collecting respiratory gas from the mammal, b) determining concentration of at least one of ethane, carbonyl sulfide, or dimethyl sulfide in the respiratory gas; and
c) correlating the concentration of at least one of the ethane, carbonyl sulfide or dimethyl sulfide to the presence of the hepatocellular injury or the biliary tract disorder in the mammal, wherein prior to determining the concentration, the respiratory gas is separated on a chromatographic system capable of detecting hydrocarbon and organosulfur molecules, the chromatography system comprising a pair of detectors for detecting the hydrocarbon or organosulfur molecules and further wherein the respiratory gas is collected into a gas collection apparatus having a sampling volume of from between about 0.01 liters to 20 liters, the gas collection apparatus comprising a chamber comprising a polymeric adsorbent and the method further comprises cooling the chamber from between about −
100°
C. to −
150°
C. to concentrate the volatile organic molecules in the adsorbent, wherein the method further comprises heating the chamber from between about 100°
C. to 200°
C. to release the concentrated volatile organic molecules therefrom.- View Dependent Claims (50)
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Specification