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Systems and methods for determining location of an access needle in a subject

  • US 9,642,534 B2
  • Filed: 05/04/2012
  • Issued: 05/09/2017
  • Est. Priority Date: 09/11/2009
  • Status: Active Grant
First Claim
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1. A method of inferring the location of a needle in a subject, the method comprising:

  • inserting a needle including a first sensor into a body of a subject;

    receiving cardiac waveform information of the subject from a second sensor;

    receiving pressure frequency information from the first sensor;

    segmenting the pressure frequency information based at least in part on the cardiac waveform information;

    processing the segmented pressure frequency information using an algorithm to obtain algorithm results; and

    distinguishing, by a computer processor, a current location of the needle from another location based on comparing the algorithm results to a plurality of predetermined threshold values.

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