Development of medical infusion pump in compliance with EMC requirements

摘要

We have developed a medical infusion pump in compliance with EMC requirements. The applied concepts are safety against interactions from an electrosurgical knife or mobile telephone. The given specifications and features are a finger pump with a wide flow rate range, infusion volume program and drip volume calibration, and power source range of 85～264v AC, battery operating function. It also provides such alarm functions as an air detector. A specific photodiode, strong against electromagnetic noise, is applied in the drip detector to meet EMC requirements. The pump has further features of a multilayer CPU board, advanced surface treatment of non electrolytic nickelplating on copper plating base and dual insulating configuration of electromagnetic inducing connection for power unit, etc. As a result, it was found in the tests on the samples that the pump complies with the EMC requirements, and has no reciprocal effect from the simultaneous use of an electrosurgical knife or mobile telephone.