Sci. Adv. Today 4 (2018) 25278  
  Research Article  
Force-Sensing suture anchor for real time monitoring of tensile loads  
  Andrew J. DeRouina, Allysa Meinberga, Erin Murphya, Alexa Thompsona, Timothy Neuschwanderb and Keat Ghee Onga  
a Biomedical Engineering, Michigan Technological University, Houghton, MI 49931, USA
b UP Health System Marquette, Marquette, MI, 49855, USA

  A wireless sensor was embedded in a suture anchor to monitor force at the suture after a surgical procedure such as a rotator cuff repair. The sensor was made of an array of magnetoelastic strips, stacked together and adhered to a stainless steel strip to form a force-sensing element. The magnetoelastic force-sensing element was embedded in the anchor with one end connected to the suture. As a result, after the anchor was secured to a substrate (e.g., bone), tensile force applied to the suture would create a strain on the magnetoelastic strips. The response from the magnetoelastic strip was detected through a set of excitation/detection coils. Experiments were conducted to characterize the performance of the sensor in terms of sensitivity, stability, and detection range. The application of the sensor was demonstrated by securing a prototype force-sensing anchor to a rotator cuff training block and characterizing its performance.  
  Cite this article as:  
  Andrew J. DeRouin, Allysa Meinberg, Erin Murphy, Alexa Thompson, Timothy Neuschwander and Keat Ghee Ong , Force-Sensing suture anchor for real time monitoring of tensile loads, Sci. Adv. Today 4 (2018) 25278.