In vitro assessment of the trackability of neurovascular intermediate catheters: a comparative analysis |
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Authors: | Brian T. Jankowitz Mahdis Shayan Anne M. Robertson Youngjae Chun |
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Affiliation: | 1. Department of Neurological Surgery;2. Department of Industrial Engineering;3. Department of Mechanical Engineering;4. Department of Bioengineering, University of PittsburghPennsylvania 15261USA |
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Abstract: | The advent of new flexible intermediate catheters facilitated manual aspiration thrombectomy (MAT) for treating neurovascular ischaemic diseases. While these catheters are somewhat flexible, most catheters were not designed specifically for aspiration. Trackability is an important property of catheters facilitating catheter advancement in highly tortuous cerebrovasculature. In this study, a novel in vitro trackability test system has been developed using micro pressure transducers and silicone tubes. The exerted force from the catheter tips were quantitatively evaluated while the catheter passed the curved regions. The trackability of three different types of catheters were compared, i.e. Penumbra 054, Concentric DAC 057 and Reverse Reflex. The exerted forces obtained from the first sensor (Sensor 1) during passing the second curve showed the maximum values through the entire transcatheter procedure. When compared, the exerted forces were least for the Penumbra 054 (0.272?±?0.012?N), representing highly trackable systems in highly tortuous vessel navigation. |
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Keywords: | Catheter flexibility trackability |
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