Implantable Self-resonant Tag for Passive Sensing

Implantable medical devices have become an integral part of modern day’s healthcare
system. They can be used for telemetry and monitoring of different biological activities inside
the body. They can also be employed to help the body regain certain functions such as
restoring hearing sense and regulating heartbeats for arrhythmia patients. This research
project suggests the use of self-resonant tag for passive sensing inside the body. The concept
of passive sensing eliminates the need for any electronic components on the implant. A selfresonant
tag manufactured from biodegradable material can be used to passively sense
chemical changes inside the body and communicate this information with an off-body
receiver by means of backscattering communications. It is proposed that a biodegradable selfresonant
tag can be employed to monitor the healing process of soft tissue trauma. The tag
would be implanted near a wound site in the final stages of surgery, and the status of healing
tissues can be monitored through the resonance position of the tag.