Thermoset Shape Memory Polymer Variable Stiffness 4D Robotic Catheters
Автор: Multi-Scale Robotics Lab - ETH Zürich
Загружено: 2021-11-01
Просмотров: 1037
Описание:
Variable stiffness catheters are typically composed of an encapsulated core. The core is usually composed of a low melting point alloy or a thermoplastic polymer. In both cases, there is a need to encapsulate the core with an elastic material. This imposes a limit to the volume of variable stiffness material and limits miniaturization. This paper proposes a new approach that relies on the use of thermosetting materials. The variable stiffness catheter proposed in this work eliminates the necessity for an encapsulation layer and is made of a unique biocompatible thermoset polymer with an embedded heating system. This significantly reduces the final diameter, improves manufacturability, and increases safety in the event of complications. The integration into a magnetic actuation system can significantly improve endovascular procedures. The capabilities are demonstrated by performing a robotic catheterization with a variable stiffness guiding catheter.
Link to paper: http://doi.org/10.1002/advs.202103277
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