@inproceedings{8956754, Author = {R. Chadda and S. Wismath and M. Hessinger and N. Schäfer and A. Schlaefer and M. Kupnik}, Title = {Needle Tip Force Sensor for Medical Applications.}, Year = {(2019).}, Pages = {1-4}, Month = {Oct}, Booktitle = {2019 IEEE SENSORS}, Doi = {10.1109/SENSORS43011.2019.8956754}, Keywords = {biomedical equipment;brachytherapy;force sensors;haptic interfaces;medical robotics;needles;strain gauges;surgery;medical applications;silicon-based semiconductor strain gauges;brachytherapy;deformation body;guiding rod;surgical needle;thinned area;strain gauge;interaction forces;measurement means;nominal needle tip force sensor;size 1.2 mm;current 1.0 mA;Force Measurement;Strain Measurement;Needle Tip Force Sensing}, Abstract = {We present a 10 N nominal needle tip force sensor based on silicon-based semiconductor strain gauges that can be used in brachytherapy or biopsies. As deformation body the guiding rod of such a surgical needle with a diameter of 1.2 mm is used. In a thinned area, near the tip of the needle, the strain gauge, as sensing element, is applied with a flexible PCB for electrical connection. Two needles are built and characterized using a testing machine. The sensors provide sensitivities of 6.1 mV/N and 6.4 mV/N for only 1 mA supply current of the bridge, respectively. The linearity and hysteresis errors are in the range of 0.6 % to 4.4 %, which allows measuring interaction forces at the needle tip. Our results prove that the force sensor will provide new measurement means or applications with haptic feedback or for robotic insertion tools} } @COMMENT{Bibtex file generated on 2024-3-29 with typo3 si_bibtex plugin. Data from https://www.tuhh.de/mtec/publications/2019-2013 }