Thermoset Shape Memory Polymer Variable Stiffness 4D Robotic Catheters скачать в хорошем качестве

Thermoset Shape Memory Polymer Variable Stiffness 4D Robotic Catheters

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