We invite applications for PhD candidates with a strong interest in performing cutting-edge research, to study the design and control of novel catheters with programmable friction.
The field of minimally-invasive cardiovascular intervention has proved its benefit over open-heart surgery, leading to shorter recovery times and lower infection rates. In cardiovascular interventions, the interventionist navigates specialized catheters through the arteries to the heart, where the interventions are performed. These devices are fitted with low friction coatings so that their introduction into the body does not damage the mucous membranes of the blood vessels. While low friction is beneficial to avoid damage to the membranes, it makes holding a specific location inside the heart difficult. This is particularly true when high forces need to be applied during cutting or puncturing tissues.
The novel approach put forward in this project aims at controlling frictional properties in real-time, using ultrasonic friction modulation, to anchor and release a compliant catheter inside the body. The body of the catheter will exhibit high-friction with the biological tissues by default to maintain a certain position, to operate with high forces without buckling, and can become near frictionless by engaging the ultrasonic actuation during insertion and removal of the catheter; preventing the “Chinese finger trap” effect.
In this project you will:
The PhD position is part of the Bio Inspired Technology (BITE; www.bitegroup.nl ) group of the BioMechanical Engineering (BME) department, which has extensive experience in flexible steerable surgical instrument design, and the Delft Haptics Lab (https://delfthapticslab.nl ) of the Cognitive Robotics department (CoR), which brings expertise in ultrasonic friction-modulation. The project will be carried out in collaboration with Amsterdam University Medical Center (AUMC) and Erasmus Medical Center (EUMC), as well as the Interfacial Fluid Phenomena Group in the Process & Energy (P&E) department.
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