Mazomenos, E; Chang, P-L; Rolls, A; Bicknell, CD; Riga, CV; Stoyanov, D; (2015) Comparing the performance of conventional and robotic catheters in transcatheter aortic valve implantation. In: Proceedings of the 5th Joint Workshop on New Technologies for Computer/Robot Assisted Surgery (CRAS 2015). CRAS - Workshop on Computer/Robot Assisted Surgery: Woluwé-Saint-Lambert, Belgium.

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Abstract

In this paper we investigate the performance of a recently developed robotic catheterization platform in comparison to conventional surgical equipment. Transcather aortic valve implantation (TAVI) was chosen as the test case and 12 interventionists (6 experts and 6 novices) participated in experiments with a silicon aorta model. Video sequences of the fluoroscopic monitor, used for guiding the instruments, were captured and processed with specialized software. To evaluate and compare the two systems the 2-D position of the catheter/guidewire tip is tracked and the shape of the phantom model is extracted in the video frames. In our analysis, we focus on three metrics; the procedure time, the average speed and the average distance to the vessel wall. The obtained results show that procedure time is capable of discriminating the participants of the different experience groups, achieving p=0.008 in the first stage of the experiment. In addition, experts consistently exhibit a higher average speed than novices. Ultimately, the increased average distance to the vessel wall demonstrated by the robotic system is an indication of improved precision and safer catheter/guidewire navigation.

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