Sampling devices and methods utilizing biased capillary action
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United States of America Patent
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Issued Date -
Jun 24, 2004
app pub date -
Dec 10, 2003
filing date -
Dec 24, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A device is constructed so as to define a capillary channel that draws a body fluid form a proximal portion of the capillary channel toward a distal portion. A counterbore defining a 'ledge' not substantially normal to the center line of channel causes the meniscus of body fluid to be 'biased' into a non-radially-symmetric shape. In one example, the bias draws the body fluid toward a testing element that is set into a groove in the main body of the device. In another example, hydrophilic and/or hydrophobic regions are created on or in device to produce the biasing effect. In certain configurations, device requires less blood to be drawn into the capillary channel for a successful test than if the biasing effect were not created.
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