We keep experiencing difficulties with ECG monitoring (gross noise and interference) when patients on ICU are undergoing haemodiafiltration.

It happens with a range of different monitoring equipment, Kontron, Propaq, Fukuda Denshi etc, adjusting monitoring settings filters etc does not resolve the problem.

Does anyone know exactly what the underlying cause is, it seems to relate somehow to the peristaltic pumps ?do they cause potential differences within the blood resulting in current flow and surface potentials on the patient.

If anyone knows of a solution or ways of mimising the problem please let me know.


Paul Jones