Needle Tip Force Sensor for Medical Applications

Publikationstyp
Conference Paper
Date Issued
2019-10
Sprache
English
Author(s)
Chadda, Romol  
Wismath, Sonja  
Hessinger, Markus  
Schäfer, Niklas
Schlaefer, Alexander  
Kupnik, Mario  
Institut
Medizintechnische Systeme E-1  
TORE-URI
http://hdl.handle.net/11420/4790
Volume
2019-October
Article Number
8956754
Citation
IEEE Sensors: 8956754 (2019-10)
Contribution to Conference
18th IEEE Sensors, SENSORS 2019  
Publisher DOI
10.1109/SENSORS43011.2019.8956754
Scopus ID
2-s2.0-85078697507
Publisher
IEEE
ISBN
978-1-7281-1634-1
978-1-7281-1635-8
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.
Subjects
Force Measurement
Needle Tip Force Sensing
Strain Measurement
DDC Class
600: Technology