Method and Apparatus For Venipuncture Site Location
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United States of America Patent
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Issued Date -
Oct 2, 2008
app pub date -
Jul 11, 2006
filing date -
Jul 11, 2005
priority date (Note) -
Abandoned
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Abstract
A vein locator comprises an energy source for directing incident energy toward organism tissue. At least a portion of the incident energy is reflected from structures within the organism tissue as reflected energy. The vein locator comprises an energy detector connected to detect energy reflected from the organism tissue. The incident energy is moved across a scan region a first time and the energy detector produces a corresponding first signal representative of at least one characteristic of the first reflected energy. A controller receives the first signal, identifies an extremum in the first signal and determines a threshold level based on the identified extremum. The incident energy is then moved across the scan region a second time and the energy detector produces a corresponding second signal representative of at least one characteristic of the second reflected energy. The controller compares the second signal to the threshold level to determine whether a current location of the incident beam represents a location of a vein.
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