The importance for EMI Filtering in Medical Devices

The importance for EMI Filtering in Medical Devices 

Many medical devices has increasingly add sensitive analogue electronics, such as wireless technologies, and microprocessors, which makes the EMI become a significant concern for medical device manufacturers.

These improvement on the medical devices will make unforeseen problems on Inter-system interference. For example the interactions between the products emitting electromagnetic energy and other sensitive medical devices.

Beside there has some intra-system interference. Because some medical devices themselves may bring EMI energy which can react with themselves.

When the device has been affected by EMI, may be only a display ‘blip’ on a monitor, or there could be become serious alarming or inappropriate device movement leading to patient injury or death.

Extensive laboratory testing has revealed that many devices can have immunity problems caused by EMI.

So, the manufacturer of medical devices have to keep in mind of the importance of shielding EMI in production. Which need to against possible interfering emission.

What can we do to Reduce the EMI Impact on the device?

DOREXS EMI Solutions can help you to mitigate the risk of EMI

In order to reduce manufacturing costs, manufacturers should consider EMI shielding issues at the earliest stage of product design. The best solution to this problem is to use an EMI power line filter and install a power line or EMI filter at the power entry point of the device. An EMI Filter can not only with conducted emissions, but also in meeting immunity and fast transients requirements along with radiated emissions too.  

How to Select an appropriate EMI Filter?

The design parameters of EMI Filter include:

21. Attenuation (insertion loss)
21. Rated Current
21. Rated Voltage
21. Product quality certification

Meanwhile in order to get the most efficiency, reliability, and proper operation from the EMI Filter. To design a good filter, the pass band must be defined just as the potential interference frequencies.  As any filter schematic only an approximation of the filter circuit especially at higher frequencies, in real life the filter components exhibit tolerance, and saturation.

We don’t suggest the design engineer to design a filter without any experience.

DOREXS EMI Filter will help to find a suitable filter for requirements. For example, DOREXS FILTER Model DBI5, A filter particularly suitable for use in medical equipment.

It is an IEC socket filter which covered by nickel plated iron shell, what inside is Manganese zinc ferrite magnetic ring. This type of manufacturing process is achieved through external EMI Shielding. And it uses a socket connection method to block noise from the power input port with the strongest interference signal. The typical filter attenuation of model DBI5 is from 1 MHz to 30 MHz.

We also add a fuse on the IEC socket to protect devices. And a boat-shaped switch is added to the socket-type power filter. When encountering an emergency caused by strong interference, the power can be turned off directly at the filter.

DOREXS Manufacturing on EMI Filter

DOREXS with more than 10 years of experience in EMI filter. We know best practices for protecting medical devices from EMI. As full-service EMI FILTER.

We will take every factor of your device into account to ensure it meets regulatory compliance, more over we will provide free sample for your new device testing.

Contact us today to learn more about our best practices for manufacturing EMI FILTER on medical devices