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1. (WO1995020345) MINIMIZING BLOOD CONTACT IN CARDIAC TISSUE MEASUREMENTS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1995/020345 International Application No.: PCT/US1995/001112
Publication Date: 03.08.1995 International Filing Date: 27.01.1995
Chapter 2 Demand Filed: 22.08.1995
IPC:
A61B 5/042 (2006.01) ,A61B 5/053 (2006.01) ,A61B 18/00 (2006.01) ,A61B 18/14 (2006.01)
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
B
DIAGNOSIS; SURGERY; IDENTIFICATION
5
Measuring for diagnostic purposes; Identification of persons
04
Measuring bioelectric signals of the body or parts thereof
0402
Electrocardiography, i.e. ECG
0408
Electrodes specially adapted therefor
042
for introducing into the body
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
B
DIAGNOSIS; SURGERY; IDENTIFICATION
5
Measuring for diagnostic purposes; Identification of persons
05
Measuring for diagnosis by means of electric currents or magnetic fields
053
Measuring electrical impedance or conductance of a portion of the body
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
B
DIAGNOSIS; SURGERY; IDENTIFICATION
18
Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
B
DIAGNOSIS; SURGERY; IDENTIFICATION
18
Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
04
by heating
12
by passing a current through the tissue to be heated, e.g. high-frequency current
14
Probes or electrodes therefor
Applicants:
EP TECHNOLOGIES, INC. [US/US]; 350 Potrero Avenue Sunnyvale, CA 94086, US
Inventors:
SWANSON, David, K.; US
PANESCU, Dorin; US
Agent:
HOHENFELDT, Ralph, G. ; 633 West Wisconsin Avenue Milwaukee, WI 53203, US
RYAN, Daniel, D. ; 633 West Wisconsin Avenue Milwaukee, Wisconsin 53203, US
Priority Data:
08/188,19828.01.1994US
Title (EN) MINIMIZING BLOOD CONTACT IN CARDIAC TISSUE MEASUREMENTS
(FR) REDUCTION DU CONTACT SANGUIN DANS LES MESURES DE TISSUS CARDIAQUES
Abstract:
(EN) Systems (10) for examining heart tissue morphology deploy one or more electrodes (38) into the heart in contact with endocardial tissue. The systems transmit electrical current from the electrodes (38) in paths through the contacted endocardial tissue. Based upon these current transmissions, the systems derive the electrical characteristics of tissue lying in the path. This electrical characteristc can be directly correlated to tissue morphology. The systems maximize surface contact with endocardial tissue, while minimizing contact with the surrounding blood pool, to obtain accurate tissue electrical characteristic measurements.
(FR) Systèmes (10) destinés à examiner la morphologie des tissus cardiaques, qui permettent le déploiement d'une ou plusieurs électrodes (38) dans l'intérieur du c÷ur, en contact avec les tissus de l'endocarde. Lesdits systèmes transmettent du courant électrique depuis les électrodes (38) selon des trajectoires traversant les tissus de l'endocarde en contact avec lesdites électrodes. Sur la base de ces transmissions de courant, les systèmes permettent de déduire les caractéristiques électriques des tissus se trouvant sur la trajectoire. Cette caractéristique électrique peut être directement mise en corrélation avec la morphologie des tissus. Lesdits systèmes maximisent le contact avec la surface des tissus de l'endocarde tout en minimisant le contact avec la masse de sang voisin, ce qui permet d'obtenir des mesures précises des caractéristiques électriques des tissus.
Designated States: CA, JP
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)