EMI Filter for Medical Devices

author: DOREXS

2023-10-23

EMI&EMC Filter in Medical Applications

In medical devices, electromagnetic interference (EMI) can come from multiple sources, including internal and external factors. At the same time, EMI may cause a variety of hazards, involving equipment performance, data accuracy and patient safety. Here are some common sources and hazards:

Sources of EMI in medical devices:

1. Internal impact: electromagnetic field interference caused by the interaction between various electronic components or systems inside medical equipment, such as power supplies, sensors, controllers, etc.

2. Influence from external sources:

Other electronic equipment in the hospital environment, such as multiple medical equipment, communication equipment, etc., and interference signals between them.
Electromagnetic interference signals generated by power lines in hospital environments
Radio frequency interference

EMI Hazards in Medical Devices:

1. Medical equipment performance issues

EMI may cause functional stability disorders of medical equipment and affect normal work.
Medical equipment electrical systems may be affected by EMI, causing uncontrollable triggering and failure.

2. Data accuracy issues:
EMI may cause medical device transmission errors or loss, seriously affecting data accuracy.

3. Patient safety issues:
The safety of medical devices can be compromised, posing risks to patients. For example, the failure of a device such as a pacemaker or ventilator can be life-threatening to a patient.

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

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

EMI Shielding

Here is a common technique used way in hospitals to protect some costly medical equipment, such as MRI, CT or CAT machine from electromagnetic interference. The EMI shielding will help a lot, by surrounding a medical device with conductive material, such as metal, copper, or nickel which can block out EMI.

General Performance IEC Inlet EMI Filter

EMI Filtering

We can also reduce the EMI interference on medical device through the EMI Filter. DOREXS EMI Filter will help to block the specific frequencies. For example, DOREXS FILTER Model DAI2, 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 DAI2 is from 1 MHz to 30 MHz. We also add a fuse on the IEC socket to protect devices.

High Performance power ac niose filter

Grounding

There is a sample common method to protect the device through grounding techniques. Grounding techniques can help protect against voltage surges and other sudden changes in electrical current. For example, DOREXS FILTER Model DEA4, which add the grounding lines on the filter can help to avoid the damage to the sensitive medical devices, such as pacemakers, defibrillators, and implanted orthopedic prosthetics.

1A-10A IEC Inlet Fiters with Double Fuse

Standards

To measure the medical device’s degree of protection provided by shielding materials, grounding techniques, or filtering components. IEC has set several guidelines.

1-10A IEC Inlet Fiters Medical Application

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

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.

EMI&EMC FilterinMedicalApplications Inmedicaldevices,electromagneticinterference(EMI)cancomefrommultiplesources,includinginternalandexternalfactors.Atthesametime,EMImaycauseavarietyofhazards,involvingequipmentperformance,dataaccuracyandpatientsafety.Herearesomecommonsourcesandhazards: SourcesofEMIinmedicaldevices: 1.Internalimpact:electromagneticfieldinterferencecausedbytheinteractionbetweenvariouselectroniccomponentsorsystemsinsidemedicalequipment,suchaspowersupplies,sensors,controllers,etc. 2.Influencefromexternalsources: Otherelectronicequipmentinthehospitalenvironment,suchasmultiplemedicalequipment,communicationequipment,etc.,andinterferencesignalsbetweenthem. Electromagneticinterferencesignalsgeneratedbypowerlinesinhospitalenvironments Radiofrequencyinterferenc

Application of Medical Grade EMI Filters in the Medical Field