FCC Approval of Finite Element Method for Biomedical Transmitters Good for ANSYS Software Users
Ruling allows HFSS to be used in evaluating implant RF emissions and specific absorption rate.
March 7, 2011
By DE Editors
For specific electromagnetic applications in the healthcare industry, HFSS software from ANSYS can now provide proof that a biomedical device transmitter design meets Federal Communications Commission (FCC) standards — a ruling that could enable medical device developers to cut development time and costs while meeting safety standards.
The FCC ruled in February that the finite element method (FEM) is a valid technique to simulate a medical device that must communicate with other similar devices. As a result, organizations in the medical equipment sector can use HFSS FEM electromagnetic field simulation to validate their transmitter designs.
Today’s medical implants and other equipment often contain transmitters that communicate with other devices — transferring physiological data to a doctor via wireless communication, for example, which can be used to monitor, diagnose or treat a patient’s condition. The new FCC ruling applies to transmitters that are placed inside, on, or in close proximity to the human body. Developers of such medical devices must ensure that their equipment meets radio frequency (RF) emission safety standards. Additionally, manufacturers must comply with specific absorption rate (SAR) regulations, a measure of how the body absorbs energy when exposed to an RF electromagnetic field. HFSS software — which employs FEM simulation to verify both SAR and RF emissions — can also reduce development time and costs while increasing reliability and design optimization.
“The HFSS finite element solution is extremely valuable for designing antenna systems for implantable devices,” says Mark Lanciault, principal electrical engineer, Cambridge Consultants, Inc. “Its use of an unstructured mesh is particularly well suited for modeling the complex curved surfaces within the human body, as seen in organs, tissues, and bones. Using HFSS allows us to optimize and verify performance of our implanted antenna designs in a representative environment. We will now be able to provide our customers accurate solutions specific to their device's location in the body.”
ANSYS requested that the FCC grant a waiver to the Medical Device Radiocommunication Service rules to permit FEM environmental evaluation of medical implant or body-worn equipment. The ruling granting the waiver cited scientific literature stating that FEM is a sound engineering technique, according to the company.
For more information, visit ANSYS, Inc.
Sources: Press materials received from the company and additional information gleaned from the company's website.