Surgery – Instruments – Electrical application
Reexamination Certificate
2005-08-30
2005-08-30
Peffley, Michael (Department: 3739)
Surgery
Instruments
Electrical application
C606S032000
Reexamination Certificate
active
06936047
ABSTRACT:
A system for efficient delivery of radio frequency (RF) energy to cardiac tissue with an ablation catheter used in catheter ablation, with new concepts regarding the interaction between RF energy and biological tissue. In addition, new insights into methods for coagulum reduction during RF ablation will be presented, and a quantitative model for ascertaining the propensity for coagulum formation during RF ablation will be introduced. Effective practical techniques a represented for multichannel simultaneous RF energy delivery with real-time calculation of the Coagulum Index, which estimates the probability of coagulum formation. This information is used in a feedback and control algorithm which effectively reduces the probability of coagulum formation during ablation. For each ablation channel, electrical coupling delivers an RF electrical current through an ablation electrode of the ablation catheter and a temperature sensor is positioned relative to the ablation electrode for measuring the temperature of cardiac tissue in contact with the ablation electrode. A current sensor is provided within each channel circuitry for measuring the current delivered through said electrical coupling and an information processor and RF output controller coupled to said temperature sensor and said current sensor for estimating the likelihood of coagulum formation. When this functionality is propagated simultaneously through multiple ablation channels, the resulting linear or curvilinear lesion is deeper with less gaps. Hence, the clinical result is improved due to improved lesion integrity.
REFERENCES:
patent: 5769847 (1998-06-01), Panescu et al.
patent: 5800432 (1998-09-01), Swanson
patent: 5810802 (1998-09-01), Panescu et al.
patent: 6123702 (2000-09-01), Swanson et al.
patent: 6183468 (2001-02-01), Swanson et al.
patent: 6200314 (2001-03-01), Sherman
patent: 6245065 (2001-06-01), Panescu et al.
patent: 6264653 (2001-07-01), Falwell
patent: WO 00/15130 (2000-03-01), None
Chan Eric K. Y.
Nasab Michael
Agility Capital LLC
Fitch Even Tabin and Flannery
Peffley Michael
LandOfFree
Multi-channel RF energy delivery with coagulum reduction does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multi-channel RF energy delivery with coagulum reduction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-channel RF energy delivery with coagulum reduction will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3479790