Identification and visualization of gaps between cardiac ablation sites

Patent metadata

Field	Value
Publication number	US-10568679-B2
Application number	US-201715617132-A
Country	US
Kind code	B2
Filing date	Jun 8, 2017
Priority date	Jun 2, 2014
Publication date	Feb 25, 2020
Grant date	Feb 25, 2020

Abstract

A method includes receiving locations of multiple ablation sites formed on a surface of a heart. Distances are measured among at least some of the ablation sites based on the locations. One or more gaps between the ablation sites, which meet an alerting criterion, are identified. The identified gaps are indicated to an operator.

First claim

The invention claimed is:

1. A method, comprising:
receiving locations of first and second ablation sites formed on a surface of a heart;
measuring a gap between first and second ablation sites based on the locations; and
indicating the gap on a display to an operator;
wherein when the gap is beneath an adjacent distance threshold, the step of indicating comprises indicating that the first and second ablation sites are connected;
wherein when the gap is above the adjacent distance threshold and beneath an out of group threshold, the step of indicating comprises highlighting the gap between the first and second ablation sites; and
wherein when the gap is above the out of group threshold, the step of indicating comprises indicating that the gap between first and second ablation sites is intentional.

2. The method according to claim 1 , wherein indicating that the first and second ablation sites are connected comprises showing a line connecting the first and second ablation sites.

3. The method according to claim 1 , wherein highlighting a connection between the first and second ablation sites comprises showing a bold line connecting the first and second ablation sites.

4. The method according to claim 1 , wherein indicating that the gap between first and second ablation sites is intentional comprises showing no connection between the first and second ablation sites.

5. The method according to claim 1 , wherein measuring the gap comprises measuring the distance between the first and second ablation sites.

6. The method of claim 5 , wherein the adjacent distance threshold is a distance of 5 mm and the out of group threshold is a distance of 20 mm.

7. The method according to claim 1 , wherein measuring the gap comprises scaling a distance between the first and second ablation sites by a scaling factor that depends on an ablation quality associated with one or both of the first and second ablation sites.

8. The method according to claim 1 , further comprising:
clustering a plurality of ablation sites into at least a first and second group based on the measured gap; and
determining closest neighbor ablation sites between the first and second group, the first ablation site being the closest neighbor in the first group and the second ablation site being the closest neighbor in the second group.

9. The method according to claim 1 , further comprising:
receiving a location of a third ablation site formed on a surface of a heart; and
measuring a gap between an intermediate location between the first and second ablation sites and the location of the third ablation site;
wherein when the gap is beneath a adjacent distance threshold, the step of indicating comprises indicating that the first, second and third ablation sites are connected;
wherein when the gap is above the adjacent distance threshold and beneath a out of group threshold, the step of indicating comprises indicating that the gap between the third ablation site and the intermediate location is intolerable; and
wherein when the gap is above the out of group threshold, the step of indicating comprises indicating that the gap between third ablation site and the intermediate location is intentional.

10. A system, comprising:
an interface configured to receive locations of multiple ablation sites formed on a surface of a heart;
a processor configured to measure a gap between first and second ablation sites based on the locations; and
a display configured to indicate the identified gaps to an operator;
wherein when the processor determines that the measured gap is beneath a adjacent distance threshold, the display is configured to indicate that the first and second ablation sites are connected;
wherein when the processor determines that the measured gap is above the adjacent distance threshold and beneath an out of group threshold, the display is configured to indicate that the gap between the first and second ablation sites is intolerable; and
wherein when the processor determines that the measured gap is above the out of group threshold, the display is configured to indicate that the gap between first and second ablation sites is intentional.

11. The system according to claim 10 , wherein the display is configured to show a line connecting the first and second ablation sites to indicate that the first and second ablation sites are connected.

12. The system of claim 10 , wherein the display is configured to highlight the gap between the first and second ablation sites by showing a bold line connecting the first and second ablation sites.

13. The system of claim 10 , wherein the display is configured to show no connection between the first and second ablation sites to indicate that the gap between first and second ablation sites is intentional.

14. The system of claim 10 , wherein the processor measures the gap by measuring the distance between the first and second ablation sites.

15. The system of claim 14 , wherein the adjacent distance threshold is a distance of 5 mm and the out of group threshold is a distance of 20 mm.

16. The system according to claim 10 , wherein the processor measures the gap by scaling a distance between the first and second ablation sites by a scaling factor that depends on an ablation quality associated with one or both of the first and second ablation sites.

17. The system according to claim 10 , wherein the processor is further configured to:
cluster a plurality of ablation sites into at least a first and second group based on the measured gap; and
determine closest neighbor ablation sites between the first and second group, the first ablation site being the closest neighbor in the first group and the second ablation site being the closest neighbor in the second group.

18. The system according to claim 10 , wherein the processor is further configured to:
receive a location of a third ablation site formed on a surface of a heart; and
measure a gap between an intermediate location between the first and second ablation sites and the location of the third ablation site;
wherein when the gap is beneath a adjacent distance threshold, the display is configured to indicate that the first, second and third ablation sites are connected;
wherein when the gap is above the adjacent distance threshold and beneath a out of group threshold, the display is configured to indicate that the gap between the third ablation site and the intermediate location between the first and second ablation sites is intolerable; and
wherein when the gap is above the out of group threshold, the display is configured to indicate that the gap between third ablation site and the intermediate location between the first and second ablation sites is intentional.

Assignees

• Biosense Webster Israel Ltd

Inventors

• Bustan Itamar
• Timofeyev Michael
• Zoabi Akram
• Seker Gafni Noam

Classifications

• A61B34/20

  Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis · CPC title

• A61B2018/00839

  Bioelectrical parameters, e.g. ECG, EEG · CPC title

• A61B2018/00577

  Ablation · CPC title

• A61B2034/107

  Visualisation of planned trajectories or target regions · CPC title

• A61B18/12 Primary

  by passing a current through the tissue to be heated, e.g. high-frequency current · CPC title