New Biomedical Device Uses Nanotechnology To Monitor Hip Implant Healing
It is so small, you can barely see it, but a microsensor created by University of Alberta engineers may soon make a huge difference in the lives of people recovering from hip replacement surgery. The U of A research team has invented a self-powered wireless microsensor for monitoring the bone healing process after surgery - it is so tiny it can fit onto the tip of a pen.
"This microsensor not only reduces post-operation recovery time, it will also help reduce the wait time for patients needing artificial joint implants," says Dr. Walied Moussa, a professor in the Department of Mechanical Engineering.
During the healing process that follows joint replacement, bone grows and attaches to the pores on the surface of the implant creating greater fixation and stability of the joint. This process is known as osseointegration.
Using nanotechnology, the researchers built a device that measures and compares the relative osseointegration of a hip implant over time. The microsensor will be able to monitor the progression of the biological fixation between bone tissue and the implant.
The sensor is permanently implanted with the joint and is powered kinetically - it uses the natural movement of the patient's body as its power source. When it isn't being used, it stays dormant until a doctor asks it to start transmitting data.