MSc Kawasaki

PhD student
Electronic Components, Technology and Materials (ECTM), Department of Microelectronics

Themes: Health and Wellbeing

Spatially specific peripheral nerve stimulation with focused ultrasound

  1. Pressure measurement of geometrically curved ultrasound transducer array for spatially specific stimulation of the vagus nerve
    S. Kawasaki; V. Giagka; M. de Haas; M. Louwerse; V. Henneken; C. van Heesch; R. Dekker;
    In Proc. IEEE Conf. on Neural Eng. (NER) 2019,
    San Francisco, CA, USA, March 2019.
    Abstract: ... Vagus nerve stimulators currently on the market can treat epilepsy and depression. Recent clinical trials show the potential for vagus nerve stimulation (VNS) to treat epilepsy, autoimmune disease, and traumatic brain injury. As we explore the benefits of VNS, it is expected that more possibilities for a new treatment will emerge in the future. However, existing VNS relies on electrical stimulation, whose limited selectivity (due to its poor spatial resolution) does not allow for any control over which therapeutic effect to induce. We hypothesize that by localizing the stimulation to fascicular level within the vagus nerve with focused ultrasound (US), it is possible to induce selective therapeutic effects with less side effects. A geometrically curve US transducer array that is small enough to wrap around the vagus nerve was fabricated. An experiment was conducted in water, with 48 US elements curved in a 1 mm radius and excited at 15 MHz to test the focusing capabilities of the device. The results show that the geometrical curvature focused the US to an area with a width and height of 110 μm and 550 μm. This will be equivalent to only 2.1% of the cross section of the vagus nerve, showing the potential of focused US to stimulate individual neuronal fibers within the vagus nerve selectively.

    document

  2. A low-cost electrical read-out system for cell stiffness measurement using silicon based microfluidic device
    S. Kawasaki; M. M. Kluba; R. Dekker;
    In ICT.OPEN,
    2017.

  3. Silicon based microfluidic device with integrated electrodes for the assessment of cellular stiffness
    S. Kawasaki; M. Kluba; R.Dekker;
    In Design of Medical Devices Conference (DMD Europe),
    2017.

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Last updated: 12 Mar 2019

Shinnosuke Kawasaki