What are the domestic and international EMC (electromagnetic compatibility) standards for high-frequency oscillatory ventilators?

High-frequency oscillatory ventilators (HFOVs), as specialized respiratory support devices, must comply with EMC standards GB 9706.1, YY 0505 (domestic), and IEC 60601-1-2 (international). They generate high-frequency oscillating airflow of several hundred hertz via pistons or speaker diaphragms. Their drive circuits are high-power and high-frequency, making electromagnetic emission a significant concern. Standards require that while providing effective ventilation, the conducted and radiated emissions generated by the ventilator must be strictly controlled to prevent interference with equipment such as ECG monitors and infusion pumps within the same ward. Furthermore, the control circuitry must have sufficient immunity to external interference (e.g., ESD).