Systems and methods for determining location of an access needle in a subject
First Claim
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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Accused Products
Abstract
Systems and methods for epicardial electrophysiology and other procedures are provided in which the location of an access needle may be inferred according to the detection of different pressure frequencies in separate organs, or different locations, in the body of a subject. Methods may include inserting a needle including a first sensor into a body of a subject, and receiving pressure frequency information from the first sensor. A second sensor may be used to provide cardiac waveform information of the subject. A current location of the needle may be distinguished from another location based on an algorithm including the pressure frequency information and the cardiac waveform information.
248 Citations
23 Claims
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1. A method of inferring the location of a needle in a subject, the method comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for accessing one or more locations of a subject, said system comprising:
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a needle having a distal end and a proximal end; and a first sensor in communication with said needle for sensing pressure frequency in the one or more locations of the subject; and a processor configured to; receive cardiac waveform information of the subject from a second sensor; receive pressure frequency information from the first sensor; segment the pressure frequency information based at least in part on the cardiac waveform information; process the segmented pressure frequency information using an algorithm to obtain an algorithm results; and distinguish a current location of the needle from another location based on comparing the algorithm results to a plurality of predetermined threshold values. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A device for inferring the location of a needle in a subject, said device comprising:
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a needle including a first sensor; a first input configured to receive pressure frequency information from the first sensor disposed on the needle; a second input configured to receive cardiac waveform information of the subject from a second sensor; and a processor configured to; receive cardiac waveform information of the subject from the second sensor; receive pressure frequency information from the first sensor; segment the pressure frequency information based at least in part on the cardiac waveform information; process the segmented pressure frequency information using an algorithm to obtain an algorithm results; and distinguish a current location of the needle from another location based on comparing the algorithm results to a plurality of predetermined threshold values. - View Dependent Claims (23)
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Specification