4.2 Article

Validation of the accuracy of contact force measurement by contemporary force-sensing ablation catheters

期刊

JOURNAL OF CARDIOVASCULAR ELECTROPHYSIOLOGY
卷 34, 期 2, 页码 292-299

出版社

WILEY
DOI: 10.1111/jce.15770

关键词

catheter ablation; contact force; force sensing; radiofrequency ablation

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This study aims to compare the accuracy and reproducibility of four different force sensing ablation catheters. The results show that the contact force measured by these catheters deviates by 1-3 g from the actual force within the range of 10-40 g. However, significant errors can occur at higher forces, potentially impacting clinical outcomes.
IntroductionContact force sensing catheters are widely used for ablation of cardiac arrhythmias. They allow quantification of catheter-to-tissue contact, which is an important determinant for lesion formation and may reduce the risk of complications. The accuracy of these sensors may vary across the measurement range, catheter-to-tissue angle, and amongst manufacturers. We aim to compare the accuracy and reproducibility of four different force sensing ablation catheters. MethodsA measurement setup containing a heated saline water bath with an integrated force measurement unit was constructed and validated. Subsequently, we investigated four different catheter models, each equipped with a unique measurement technology: Tacticath Quartz (Abbott), AcQBlate Force (Biotronik/Acutus), Stablepoint (Boston Scientific), and Smarttouch SF (Biosense Webster). For each model, the accuracy of three different catheters was measured within the range of 0-60 g and at contact angles of 0 degrees, 30 degrees, 45 degrees, 60 degrees, and 90 degrees. ResultsIn total, 6685 measurements were performed using 4 x 3 catheters (median of 568, interquartile range: 511-606 measurements per catheter). Over the entire measurement-range, the force measured by the catheters deviated from the real force by the following absolute mean values: Tacticath 1.29 +/- 0.99 g, AcQBlate Force 2.87 +/- 2.37 g, Stablepoint 1.38 +/- 1.29 g, and Smarttouch 2.26 +/- 2.70 g. For some models, significant under- and overestimation of >10 g were observed at higher forces. Mean absolute errors of all models across the range of 10-40 g were <3 g. ConclusionContact measured by force-sensing catheters is accurate with 1-3 g deviation within the range of 10-40 g. Significant errors can occur at higher forces with potential clinical consequences.

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