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US 12,213,728 B2Granted
Temperature controlled short duration ablation with resistive heating
AssigneeBiosense Webster (Israel) Ltd.
InventorsKeshava Datta, Kristine Fuimaono, Assaf Govari, Andres Claudio Altmann, Tushar Sharma
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Abstract
A method, including performing an ablation of tissue using a first high RF power for a short duration, suspending RF power for a predetermined period, and using a second high RF power for a short duration forming lesions with greater surface area and greater depth through resistive heating and thermal latency. High RF power may range between 75-95 W and short duration may range between 4-5 seconds.
Claims6
A method of ablation comprising:
- inserting a catheter into a subject, the catheter having an ablation electrode configured for tissue contact;
- performing an ablation session on the tissue for a predetermined total duration of time less than about 18 seconds, including:
- applying resistive heating to the tissue by radiofrequency (RF) power via the electrode within a range of about 75 W-95 W for a first duration of about 4 seconds to form a lesion with a depth of about 3.5 mm;
- suspending application of RF power to the electrode for a second duration no greater than 10 seconds, during which a temperature of the lesion continues to increase, to allow tissue surrounding the lesion to heat by conduction from the lesion;
- measuring temperature of the tissue at least every 33 ms at a depth of about 3 mm to determine dissipation of about 90% of heat of the tissue within about 4 seconds;
- and
- while the tissue surrounding the lesion remains heated by conduction from the lesion, reapplying resistive heating by RF power via the electrode within the range of about 75 W-95 W for a third duration of about 4 seconds to the lesion to increase depth of the lesion to about 4.5 mm into the surrounding tissue.
4 more elements
Dependencies are inferred from the claim text.