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US 2020/0345414 A1Published application
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.
Claims16
A method of ablation includes:
- 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, including:
- applying radiofrequency (RF) power via the electrode within a range of about 75 W-95 W that induces resistive heating for a first duration to form a lesion having a first depth;
- suspending application of RF power to the electrode for a second duration;
- and
- reapplying RF power via the electrode to the lesion within a range of about 75 W-95 W for a third duration to increase lesion to a second depth.
3 more elements
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, including:
- applying resistive heating by radiofrequency (RF) power via the electrode within a range of about 75 W-95 W for a first duration to form a lesion with a depth of about 3.5 mm;
- suspending application of RF power to the electrode for a second duration to allow tissue surrounding the lesion to heat by conduction from the lesion;
- 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 to the lesion to increase depth of the lesion to about 4.5 mm.
3 more elements
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 of less than about 13 seconds, including:
- applying radiofrequency (RF) power to induce resistive heating via the electrode within a range of about 75 W-95 W for about 4 seconds to form a lesion;
- suspending application of RF power to the electrode for no greater than about 5 seconds to allow tissue surrounding the lesion to heat by conduction from the lesion;
- and
- while the tissue surrounding the lesion remains heated by conduction from the lesion, reapplying RF power to induce resistive heating via the electrode to the lesion within a range of about 75 W-95 W for about 4 seconds to increase depth of the lesion.
3 more elements
A method of ablation includes:
- 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 of less than about 13 seconds, including:
- applying radiofrequency (RF) power by resistive heating via the electrode to form a lesion having a depth of about 3.5 mm;
- suspending application of RF power to the electrode to allow tissue surrounding the lesion to heat by conduction from the lesion;
- and
- while the tissue surrounding the lesion remains heated by conduction from the lesion, reapplying RF power by resistive heating via the electrode to increase depth of the lesion to about 4.5 mm.
3 more elements
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, including:
- applying radiofrequency (RF) power of about 360 joules via the electrode for a first duration of about 4 seconds to form a lesion having a first depth of about 3.5 mm;
- suspending application of RF power to the electrode for a second duration no greater than about 10 seconds;
- and
- reapplying RF power of about 360 joules via the electrode to the lesion for a third duration of about 4 seconds to increase lesion to a second depth of about 4.5 mm.
3 more elements
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, including:
- applying radiofrequency (RF) power of about 360 joules via the electrode to form a lesion by resistive heating having a first depth of about 3.5 mm;
- suspending application of RF power to the electrode for a second duration to allow the lesion to heat surrounding tissue by conductive heating;
- and
- while the surrounding tissue contains conductive heating from the lesion, reapplying RF power of about 360 joules via the electrode to the lesion by resistive heating to a second depth of about 4.5 mm.
3 more elements
Dependencies are inferred from the claim text.