ANSYS Simulation for Healthcare
Introduction: Today's society is characterized by rapid technological development and an increasingly advanced economy. Wireless technology has opened a new world for medical implantable devices, making remote monitoring and treatment optimization a reality. The following is my carefully organized for you on the ANSYS simulation for health care field, I hope it can help you in the study oh!
Wireless technology has opened up a new world of medical implantable devices, making remote monitoring and treatment optimization a reality. However, in order to design successful wireless implantable devices, designers must meet the requirements of different use cases and a variety of regulations, each of which has its own special challenges.
In general, smart medical implantable devices must be able to communicate wirelessly with external handheld devices in at least three different environments:
1. The operating room, where the implanted device is programmed before it is implanted in the patient.
2. The medical office, where the physician uses the external programming device to wirelessly communicate with the implanted device for subsequent monitoring.
3. At home: A bedside wireless box is typically used to communicate with the implanted device, relaying diagnostic information and any alarms immediately to the physician/medical staff.
Wireless RF performance is affected by the fact that human tissue reflects and absorbs some of the wireless signal, as well as affecting the operating frequency and bandwidth of the antenna. In addition, the size of the patient can also have a significant impact on the communication distance between the implanted device and external devices. In recent years, Bluetooth Smart has become a popular connectivity option on smartphones. Manufacturers of implantable devices certainly do not want to miss this opportunity. The fact that Bluetooth operates at a much higher frequency than the wireless technology used in medical devices means that a larger portion of the energy is absorbed by the body, making the antenna range issue even more problematic. Antennas may often need to be tuned in order to accommodate physiological changes in the patient (e.g., if the patient gains or loses weight). Finally, regulators may impose strict limits on the power of the radiation, the specific absorption rate, and the speed and amount of data transmitted wirelessly.
Cambridge Consultants, a top global provider of engineering and technology consulting for innovative product development, uses ANSYS simulation tools to address these challenges. In addition, simulation enables engineers to optimize the design of antennas for implantable devices to increase their range and enable them to operate at the desired frequencies. Engineers can also verify antenna performance in advance for a variety of different body types.
Designing an Implantable Antenna
Engineers at Cambridge Consultants recently designed a small antenna that can operate simultaneously at 402 to 405 MHz (Medical Implantable Communication Services [MICS]) and 2.4 to 2.5 GHz (Industrial, Scientific, and Medical [[ISM]]). ISM]) frequency bands, and supports wireless communication within a range of 2 meters or more, making it possible to use it outside the clean area of an operating room. The capacitive nature of human tissue combined with the high capacitive impedance of conventional electric dipole antennas creates a residual negative reactance, which must be compensated for with an aggregate inductive load to match the microchip impedance. Therefore, engineers have adopted a relatively new approach to antenna design ? A composite field antenna that employs a magnetic loop radiator and a *** addressable electric field radiator. This approach not only provides inherent inductive impedance, allowing engineers to more easily match the impedance of implanted electronic devices, but it also better supports miniaturization and biocompatibility.
Fat, muscle, various bones, skin, and blood all have different dielectric properties. The dielectric properties of the surrounding tissues can significantly affect the performance of the antenna, e.g., having a lower '**** vibration frequency compared to the free-space performance of an antenna of the same size. However, the effect of the human body on the antenna will vary depending on the location of the antenna within the body and the size of the patient. Almost all engineers designing antennas for implantable devices use human body models to perform electromagnetic field simulations, and the units in such models are able to match the relative permittivity and conductivity of various body tissues (e.g., skin, fat, dense bone, cancellous bone, muscle, and blood). The problem with many of these models is that they are difficult to modify to match different body types. As a result, engineers typically optimize antennas for common body types, which often leads to antenna performance issues when devices are implanted in patients with atypical body types.
Accelerating Innovation
Modern implantable devices are extremely complex and require engineers to balance performance, safety, reliability, cost, and time-to-market constraints, and ANSYS engineering simulation tools have enabled Cambridge Consultants to design innovative medical devices faster.
The development of a scalable human body model helped Cambridge Consultants engineers perform regression analysis on the antenna design from the beginning of the design. This was able to halve the number of iterations required and reduce design time by 25%. The company has been able to increase the RF communication range of its latest antenna designs by 45% compared to traditional PIFA and loop antennas. Field data also shows that the performance of the simulation closely matches the finished results.
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