Method and apparatus for obtaining biological fluids
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United States of America Patent
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Jun 22, 1999
Grant Date -
N/A
app pub date -
Feb 7, 1997
filing date -
Feb 7, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention provides a method and apparatus for disrupting the outermost layer of skin, the stratum corneum, to provide access to biological fluid, which can then be used to determine the concentration of glucose in blood. The invention can be used to extract interstitial fluid, blood, and mixtures of interstitial fluid and blood from the body of a human or an animal. The method comprises the steps of (1) attaching a receptacle for collecting biological fluid to the surface of the skin of a patient, (2) introducing an oscillation concentrator attached to an oscillation element into the receptacle, (3) positioning the oscillation concentrator at a desired distance from the surface of the skin, (4) activating the oscillation element to transversely oscillate the attached oscillation concentrator, (5) collecting the biological fluid after a specific period of time, and (6) analyzing the biological fluid for the presence of an analyte.
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