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Recanalization of chronic total occlusions (CTO) of coronary vessels is a catheter intervention with proven benefit for the patient. However, it incorporates a risk of penetrating the vessel as well as increasing patients exposure to radiation and contrast agent. The physicians expertise is a key to successful interventions. In this work, we present a system to assess haptic interaction of medical...
In an ageing society, it is essential that people can live independently for as long as possible. Engineers and orthopaedic technicians have developed a motorised knee joint orthosis that compensates for declining muscle strength and could help to sustain activity and mobility in daily life.
Möglichst lange selbstständig leben — ein vitaler Wunsch in der alternden Gesellschaft. Ingenieure und Orthopädietechniker haben eine motorisierte Kniegelenk‐Orthese entwickelt, die abnehmende Muskelkraft kompensieren und Aktivität und Mobilität im Alltag sichern soll.
We have developed an inexpensive inkjet printing process to rapidly fabricate resistive sensor devices on paper substrates. We utilize the percolation based resistive change in inkjet-printed resistors based on carbon black (CB). We fabricated an ink with 2 wt% CB, 0.3 wt% binder and added 0.3 % sodium cholate as well as 0.5 wt% triton as surfactant to print strain sensitive resistors. To connect...
This paper proposes a new perception-based concept for force sensing in haptic systems. By using two different sensing principles, a better adaption to the human sensory system can be achieved. Based on the tactile and kinesthetic parts of haptic perception, this is done using different sensing principles, nominal ranges, bandwidth and degrees of freedom for each part. The requirements of each part...
During a catheterisation, the surgeon's navigation to the coronary vessels is restricted to a two-dimensional X-ray image. The HapCath system presents a haptic feedback to the surgeon to enable a more intuitive navigation similar to a blind man's cane. In this paper the actuation system for the haptic interface is shown. A piezoelectric ultrasonic actuator is used to generate force and torque on the...
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