WO2007035339A3 - Method of scaling navigation signals to account for impedance drift in tissue - Google Patents

Method of scaling navigation signals to account for impedance drift in tissue Download PDF

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Publication number
WO2007035339A3
WO2007035339A3 PCT/US2006/035585 US2006035585W WO2007035339A3 WO 2007035339 A3 WO2007035339 A3 WO 2007035339A3 US 2006035585 W US2006035585 W US 2006035585W WO 2007035339 A3 WO2007035339 A3 WO 2007035339A3
Authority
WO
WIPO (PCT)
Prior art keywords
impedance
scaling
tissue
account
navigation signals
Prior art date
Application number
PCT/US2006/035585
Other languages
French (fr)
Other versions
WO2007035339A2 (en
Inventor
John A Hauck
Original Assignee
St Jude Medical Atrial Fibrill
John A Hauck
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by St Jude Medical Atrial Fibrill, John A Hauck filed Critical St Jude Medical Atrial Fibrill
Priority to AU2006292698A priority Critical patent/AU2006292698B2/en
Priority to EP06814553A priority patent/EP1931254A4/en
Priority to JP2008531259A priority patent/JP4966310B2/en
Priority to BRPI0616562A priority patent/BRPI0616562B8/en
Priority to CA2622715A priority patent/CA2622715C/en
Publication of WO2007035339A2 publication Critical patent/WO2007035339A2/en
Publication of WO2007035339A3 publication Critical patent/WO2007035339A3/en
Priority to IL190042A priority patent/IL190042A/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • A61B5/053—Measuring electrical impedance or conductance of a portion of the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • A61B5/053—Measuring electrical impedance or conductance of a portion of the body
    • A61B5/0538—Measuring electrical impedance or conductance of a portion of the body invasively, e.g. using a catheter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/06—Devices, other than using radiation, for detecting or locating foreign bodies ; determining position of probes within or on the body of the patient
    • A61B5/061—Determining position of a probe within the body employing means separate from the probe, e.g. sensing internal probe position employing impedance electrodes on the surface of the body
    • A61B5/063—Determining position of a probe within the body employing means separate from the probe, e.g. sensing internal probe position employing impedance electrodes on the surface of the body using impedance measurements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/20—Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
    • A61B2034/2046—Tracking techniques
    • A61B2034/2051—Electromagnetic tracking systems
    • A61B2034/2053—Tracking an applied voltage gradient
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49004—Electrical device making including measuring or testing of device or component part

Abstract

A method for scaling the impedance measured during the course of an electrophysiology study accounts for impedance drifts. By scaling the impedance there is greater assurance that previously recorded positional information can be used to accurately relocate an electrode at a prior visited position. The scale factor may be based upon a mean value across several sensing electrodes (e.g., 12, 14, 16, 17, 18, 19, or 22). Alternatively, the scale factor may be calculated specifically with respect to an orientation of a dipole pair of driven electrodes (e.g., 12, 14, 16, 17, 19, 19, 22).
PCT/US2006/035585 2005-09-15 2006-09-12 Method of scaling navigation signals to account for impedance drift in tissue WO2007035339A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AU2006292698A AU2006292698B2 (en) 2005-09-15 2006-09-12 Method of scaling navigation signals to account for impedance drift in tissue
EP06814553A EP1931254A4 (en) 2005-09-15 2006-09-12 Method of scaling navigation signals to account for impedance drift in tissue
JP2008531259A JP4966310B2 (en) 2005-09-15 2006-09-12 Navigation signal scaling method to take into account impedance drift in the tissue
BRPI0616562A BRPI0616562B8 (en) 2005-09-15 2006-09-12 method of scaling navigation signals for tissue impedance pulse counting, method of determining the position of at least one measurement electrode within the patient's body, and computer readable media
CA2622715A CA2622715C (en) 2005-09-15 2006-09-12 Method of scaling navigation signals to account for impedance drift in tissue
IL190042A IL190042A (en) 2005-09-15 2008-03-10 Method of scaling navigation signals to account for impedance drift in tissue

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/227,580 2005-09-15
US11/227,580 US7885707B2 (en) 2005-09-15 2005-09-15 Method of scaling navigation signals to account for impedance drift in tissue

Publications (2)

Publication Number Publication Date
WO2007035339A2 WO2007035339A2 (en) 2007-03-29
WO2007035339A3 true WO2007035339A3 (en) 2007-10-25

Family

ID=37856226

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2006/035585 WO2007035339A2 (en) 2005-09-15 2006-09-12 Method of scaling navigation signals to account for impedance drift in tissue

Country Status (9)

Country Link
US (2) US7885707B2 (en)
EP (1) EP1931254A4 (en)
JP (1) JP4966310B2 (en)
AU (1) AU2006292698B2 (en)
BR (1) BRPI0616562B8 (en)
CA (1) CA2622715C (en)
DE (1) DE202006020991U1 (en)
IL (1) IL190042A (en)
WO (1) WO2007035339A2 (en)

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US8805490B2 (en) 2014-08-12
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