St. Jude Medical International Holding S.a.r.l.

St. Jude Medical Luxembourg Holding S.a.r.l.

Endosense Sa

St. Jude Medical International Holdings S.a R. L.

Hendrik Lambert

Giovanni Leo

Dipen Shah

Stuart J Olstad

Olivier B Fremont

A method and apparatus that utilizes a force-time integral for real time estimation of steam pop in catheter-based ablation systems. The apparatus measures the force exerted by a contact ablation probe on a target tissue and an energization parameter delivered to the ablation probe. The exerted force and energization parameter can be utilized to provide an estimation of the probability of steam pop. In one embodiment, the force and energization metrics can be used as feedback to establish a desired contact force and energization level combination to prevent steam popping.

Method for predicting the probability of steam pop in RF ablation therapy

A method and device for determining the transmurality and/or continuity of an isolation line formed by a plurality of point contact ablations. In one embodiment, a method for determining the size of a lesion (width, depth and/or volume) is disclosed, based on contact force of the ablation head with the target tissue, and an energization parameter that quantifies the energy delivered to the target tissue during the duration time of the lesion formation. In another embodiment, the sequential nature (sequence in time and space) of the ablation line formation is tracked and quantified in a quantity herein referred to as the 'jump index,' and used in conjunction with the lesion size information to determine the probability of a gap later forming in the isolation line.

Prediction of atrial wall electrical reconnection based on contact force measured during RF ablation

A method and apparatus that utilizes a force-time integral for real time estimation of lesion size in catheter-based ablation systems. The apparatus measures the force exerted by a contact ablation probe on a target tissue and integrates the force over an energization time of the ablation probe. The force-time integral can be calculated and utilized to provide an estimated lesion size (depth, volume and/or area) in real time. The force-time integral may also account for variations in the power delivered to the target tissue in real time to provide an improved estimation of the lesion size. In one embodiment, the force metric can be used as feedback to establish a desired power level delivered to the probe to prevent steam popping.

Method and apparatus for controlling lesion size in catheter-based ablation treatment

Method and apparatus for controlling lesion size in catheter-based ablation

A method and device for determining the transmuriality and/or continuity of an isolation line formed by a plurality of point contact ablations. In one embodiment, a method for determining the size of a lesion (width, depth and/or volume) is disclosed, based on contact force of the ablation head with the target tissue, and an energization parameter that quantifies the energy delivered to the target tissue during the duration time of the lesion formation. In another embodiment, the sequential nature (sequence in time and space) of the ablation line formation is tracked and quantified in a quantity herein referred to as the 'jump index,' and used in conjunction with the lesion size information to determine the probability of a gap later forming in the isolation line.

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Geneva, Switzerland

Hendrik Lambert