Hradetzky, David
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Hradetzky, David
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- PublikationExperience with a continuous education program for clinical. regulatory and quality affairs in Northwestern Switzerland(IEEE EMBC, 07/2022) Etter, Philippe; Lucano, Elena; Hradetzky, David [in: 44th Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC)]04B - Beitrag Konferenzschrift
- PublikationRapid prototyping method for 3D printed biomaterial constructs with vascular structures(IEEE, 2018) Gullo, Maurizio; Köser, Joachim; Ruckli, Oliver; Eigenmann, Andrej; Hradetzky, David [in: 2018 40th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)]This paper presents a fabrication method for rapid prototyping of 3D biomaterial constructs with vascular structures. The method relies on poloxamer fugitive ink, which is over casted with a custom-made alginate based model extracellular matrix (ECM). The presented method is simple to implement and compatible with standard cell culture workflows used in biomedical research and pharmaceutical development. We present the material preparation, gelation properties and printing methods in detail. First experiments demonstrate the suitability of the ECM constructs for 3D tissue culture.04B - Beitrag Konferenzschrift
- PublikationCapacitive on-line hematocrit sensor design based on impedance spectroscopy for use in hemodialysis machines(IEEE, 2009) Trebbels, D.; Hradetzky, David; Zengerle, R. [in: 2009 annual international conference of the IEEE engineering in medicine and biology society]This paper presents a new design for an on-line and in-line hematocrit (HCT) sensor. Special feature of the sensor is the capability to measure the hematocrit of a blood sample inside standard plastic tubing widely used in medical equipment. No blood sample has to be extracted out of existing extracorporeal blood circulation systems such as hemodialysis machines or heart-lung machines. The sensor principle is based on electrical impedance spectroscopy. Dielectric properties of the blood and the plastic tubing are measured at various frequencies. In order to optimize the sensitivity, a unique electrode configuration is developed and optimized by Finite Element Simulation. The new electrode design optimizes the overall sensitivity of the sensor towards a change in dielectric properties of the blood caused by the HCT value and therefore decreases the sensitivity to side effects caused by temperature drift and component tolerances. As a result of the optimized overall sensor performance the complexity of a sensor readout circuitry can be reduced to a minimum which leads to an unmatched price-performance ratio for a complete measurement system.04B - Beitrag Konferenzschrift
- PublikationMiniaturisierte Sensorplattform zur markierungsfreien Detektion biomolekularer Interaktionen(Cuvillier Verlag, 2005) Hradetzky, David02 - Monographie