CONTROLLING FLOW OF EXHALED BREATH DURING ANALYSIS
First Claim
1. A method for determining the amount of an analyte in exhaled breath from a subject, said method comprisingdrawing exhaled breath from said subject through a flow-through device at a constant flow rate by use of a pump integrated with said flow-through device, said flow-through device comprising a sensing element responsive to said analyte, wherein said flow-through device divides into a primary passage and a secondary passage with said sensing element in said secondary passage, anddividing exhaled breath thus drawn into said flow-through device into a primary stream through said primary passage and a secondary stream through said secondary passage.
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Accused Products
Abstract
The flow rate of a gaseous sample of exhaled breath through an analytical device is controlled by a pump, and in certain embodiments two pumps. Placement of the analyte sensor in a secondary stream branching off of the primary stream through the device offers further control over the manner, duration, and quantity of the breath that is placed in contact with the sensor.
8 Citations
14 Claims
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1. A method for determining the amount of an analyte in exhaled breath from a subject, said method comprising
drawing exhaled breath from said subject through a flow-through device at a constant flow rate by use of a pump integrated with said flow-through device, said flow-through device comprising a sensing element responsive to said analyte, wherein said flow-through device divides into a primary passage and a secondary passage with said sensing element in said secondary passage, and dividing exhaled breath thus drawn into said flow-through device into a primary stream through said primary passage and a secondary stream through said secondary passage.
Specification