How to Ensure the Internal Sensitive Circuits of ECMO Equipment are Unaffected in the Complex Electromagnetic Environment of the ICU?

Noise sources within ECMO equipment, such as the blood pump motor, can interfere with sensitive physiological signal acquisition circuits. It is essential to implement isolation and filtering from a system architecture perspective. The core principles are zonal isolation and multi-level protection. In terms of circuit layout, high-noise motor drive modules should be physically and electrically isolated from sensitive analog acquisition modules. For power distribution, independent, filtered power rails should be used for each functional module. For critical internal DC power lines, a combination of low-capacitance EMI filters and TVS devices is required to simultaneously suppress internal conducted noise and external surge intrusion. Only through systematic noise isolation and path filtering can the authenticity of monitoring data be ensured.