Device and methods of using device for detection of hyperammonemia
First Claim
Patent Images
1. A biosensor comprising:
- at least a first and second vessel;
a fluid exchange opening positioned between the first and the second vessel;
a membrane positioned across or over the fluid exchange opening; and
a catalyst in solid phase within the second vessel or within a first conduit in fluid communication with the second vessel, wherein the catalyst is nitroprusside or salt thereof with a mass of from about 5.5 micrograms to about 7.8 micrograms;
wherein the membrane comprises an ionomer.
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Abstract
The present disclosure relates to a biosensor capable of measuring the total concentration of one or a plurality of ammonia or ammonium ions with the use of indophenol reagents in the presence of an ionomer. In some embodiments, the biosensor comprises a perflurinated membrane that comprises an ionomer in contact with an alkali buffer in a vessel configured to receive a sample, such as whole blood. The disclosure also relates to a method of detecting or quantifying the ammonia or ammonium ion concentration in whole blood in a point of care bio sensor without reliance on gas chromatography or any measurement that takes more than about twenty minutes.
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Citations
31 Claims
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1. A biosensor comprising:
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at least a first and second vessel; a fluid exchange opening positioned between the first and the second vessel; a membrane positioned across or over the fluid exchange opening; and a catalyst in solid phase within the second vessel or within a first conduit in fluid communication with the second vessel, wherein the catalyst is nitroprusside or salt thereof with a mass of from about 5.5 micrograms to about 7.8 micrograms; wherein the membrane comprises an ionomer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 28, 29, 30, 31)
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22. A biosensor comprising:
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at least a first and second vessel configured for receiving a sample from a point exterior to the biosensor; a fluid exchange opening positioned between the first and the second vessel; a membrane positioned across or over the fluid exchange opening; and a catalyst in liquid phase or solid phase a hypohalite in liquid phase; an alkali buffer in liquid phase; a phenolic reagent in liquid phase or solid phase; and a fluid circuit comprising, in fluid communication; the first and second vessel;
a reagent conduit; and
a detection vessel positioned distal from the first and second vessel;wherein the catalyst is sodium nitroprusside or a salt thereof, and, if the catalyst is in solid phase, the biosensor comprises from about 5.8 to about 7.3 micrograms of sodium nitroprusside or a salt thereof in solid phase; and
, if the catalyst is in liquid phase, the sodium nitroprusside or a salt thereof is at a concentration greater than 8.4 μ
M. - View Dependent Claims (23, 24, 25, 26)
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27. A kit comprising a solid support that comprises:
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at least a first and second vessel; a fluid exchange opening positioned between the first and the second vessel; at least a first conduit in fluid communication with at least the first vessel, the first conduit configured to receive a fluid from a point external to the biosensor; and a membrane positioned at the fluid exchange opening; a catalyst in liquid phase or solid phase; a hypohalite in liquid phase; an alkali buffer in liquid phase; a phenolic reagent in liquid phase or solid phase; and a fluid circuit comprising, in fluid communication; the first and second vessel;
a reagent conduit; and
a detection vessel positioned distal from the first and second vessel;wherein the catalyst is sodium nitroprusside, and, if the catalyst is in solid phase, the biosensor comprises from about 5.8 to about 7.3 micrograms of sodium nitroprusside or a salt thereof in solid phase; and
, if the catalyst is in liquid phase, the sodium nitroprusside or a salt thereof is at a concentration greater than 8.4 μ
M; andwherein the membrane comprises an ionomer.
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Specification