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1. WO2009009746 - SPREAD SPECTRUM ELECTRIC TOMOGRAPHY

Publication Number WO/2009/009746
Publication Date 15.01.2009
International Application No. PCT/US2008/069824
International Filing Date 11.07.2008
IPC
A61B 5/05 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes; Identification of persons
05Measuring for diagnosis by means of electric currents or magnetic fields
CPC
A61B 5/02
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes
02Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
A61B 5/0536
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes
05Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
053Measuring electrical impedance or conductance of a portion of the body
0536Impedance imaging, e.g. by tomography
A61B 5/065
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes
06Devices, other than using radiation, for detecting or locating foreign bodies
065Determining position of the probe employing exclusively positioning means located on or in the probe, e.g. using position sensors arranged on the probe
A61B 5/1107
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes
103Detecting, measuring or recording devices for testing the shape, pattern, ; colour,; size or movement of the body or parts thereof, for diagnostic purposes
11Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
1107Measuring contraction of parts of the body, e.g. organ, muscle
A61B 5/318
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes
24Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
316Modalities, i.e. specific diagnostic methods
318Heart-related electrical modalities, e.g. electrocardiogaphy [ECG]
A61B 5/6851
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes
68Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
6846specially adapted to be brought in contact with an internal body part, i.e. invasive
6847mounted on an invasive device
6851Guide wires
Applicants
  • PROTEUS BIOMEDICAL, INC. [US]/[US] (AllExceptUS)
  • ZDEBLICK, Mark, J. [US]/[US] (UsOnly)
Inventors
  • ZDEBLICK, Mark, J.
Agents
  • FIELD, Bret
Priority Data
60/949,19311.07.2007US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SPREAD SPECTRUM ELECTRIC TOMOGRAPHY
(FR) TOMOGRAPHIE ÉLECTRIQUE À SPECTRE ÉTALÉ
Abstract
(EN)
Methods for locating a sensor element in vivo, e.g., during evaluation of tissue motion, such as of a cardiac tissue motion, e.g., heart wall motion, via electric tomography are provided. In the subject methods, an electric field is applied to a subject in a manner such that the sensing element is present in the applied electric field, and a property of, e.g., a change in, the applied electric field sensed by the sensing element is employed to evaluate a patient internal parameter of interest, e.g., to evaluate movement of tissue location, to evaluate a internal device parameter, such as movement thereof, etc. The invention allows for robust noise discrimination, e.g., by employing a spread spectrum applied electric field. Also provided are systems and devices for practicing the subject methods. In addition, innovative data displays and systems for producing the same are provided. The subject methods and devices find use in a variety of different applications, including cardiac resynchronization therapy.
(FR)
La présente invention concerne des procédés permettant de placer un élément capteur in vivo, par exemple, lors de l'évaluation d'un mouvement tissulaire tel que le mouvement d'un tissu cardiaque, le mouvement de la paroi cardiaque par exemple, au moyen d'une tomographie électrique. Selon les procédés de l'invention, un champ électrique est appliqué à un sujet de manière à ce que l'élément de détection se trouve dans le champ électrique appliqué, et une propriété, par exemple un changement, du champ électrique appliqué détecté par l'élément de détection sert à évaluer un paramètre d'intérêt interne du patient, par exemple à évaluer un mouvement de l'emplacement du tissu, afin d'évaluer un paramètre de dispositif interne, tel son mouvement, etc. L'invention permet d'effectuer une discrimination robuste du bruit au moyen, par exemple, de l'application d'un champ électrique à spectre étalé. L'invention porte aussi sur des systèmes et des dispositifs permettant d'appliquer les procédés de l'invention. De plus, l'invention a trait à des écrans d'affichage des données de l'invention et à des systèmes de production correspondants. Les procédés et les dispositifs de l'invention peuvent s'utiliser lors de différentes applications, notamment la thérapie de resynchronisation cardiaque.
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