Power supplies for medical and healthcare equipment have to meet not only the functional parameters of your clinical application but also safety approvals such as IEC 60601-1-2. This standard defines the basic and essential performance for medical equipment in regard to emissions and immunity to electromagnetic disturbances.
As more medical-grade equipment is used outside of hospitals or professional healthcare facilities to include home use, the latest 4th edition of this EMC standard addresses environments that have reduced control of EM disturbances. The changes also align more with the IEC60601-1 safety standard emphasis on risk management. With more and more electronics in medical equipment and wireless devices expanding in the market place and used in medical devices, ensuring proper function of devices like infusion pumps, ECGs, defibrillators, pacemakers, electrical surgical equipment and other devices is paramount.
SL Power has been making power supplies for medical and healthcare applications for over 30 years, so we have built a portfolio of standard medical grade power products. We design to optimize five key performance criteria, identified by acronym TREPP, resulting in well-balanced and versatile power conversion solutions that seamlessly integrate into the end equipment:
TREPP is not only an acronym representing the five performance dimensions of power conversion but a standard that SL Power’s engineers strictly adhere to. Optimizing TREPP is a primary consideration throughout the entire product development cycle and a driving force that guides engineering decisions.
We also have the processes and experience needed by medical equipment makers. Our proprietary customer-centric product development process identifies and mitigates design, engineering, manufacturing, and sourcing risk through industry standard (DFMEA, PFMEA, ISO 14971) and proprietary tools.
In-house evaluation and testing laboratories minimize expensive certification costs, ensure rapid development cycles and significantly improve the operational reliability of our power supplies.
We Power Medical Applications That Matter
SL Power medical power supplies can be found in virtually every healthcare application category, including surgical technologies, patient monitoring and home care applications. In addition to power supplies that meet the Type B classification, we are one of just a handful of companies that offers Type BF and Type CF rated power supplies. These classifications are part of the ‘applied parts’ context of the IEC 60601 specification and relate to parts of a medical device that may come into physical contact with the patient during its normal operation.
Type B (body) is the least stringent classification, covering parts which are not normally conductive and can be immediately released from the patient. Examples would be operating theatre lighting, medical lasers, MRI scanners, hospital beds and phototherapy equipment.
Type BF (body floating) covers equipment that comes into conductive contact with the patient, whether for a short or long time. It is probably the largest category of medical equipment and includes devices such as blood pressure monitors, non-cardiac surgical equipment, incubators and ultrasound equipment.
The most stringent classification, Type CF (cardiac floating), is for applied parts that may come into direct contact with the patient’s heart. A Type CF power supply provides a much higher degree of protection against electric shock and much tighter leakage current limits to the patient than a Type BF unit. This category includes medical devices for dialysis or ablation and electrocardiograph (ECG) machines.
Power supplies for patient monitoring equipment may be external adapters or internal embedded units. The power supply may be powering sensors for pulse oximetry, blood pressure or body temperature, a mechanism for inflating a cuff, valves or pumps, in addition to the internal circuitry and possibly a touch screen controller. As patient monitoring systems become more mobile, battery charging and communications modules have become a critical part of the draw on a patient monitoring power supply.
Home healthcare equipment includes devices such as a CPAP or infusion pump. This medical equipment typically uses an external adapter and, given the environment, usually a Class II input unit. Class II input means that power supply requires no earth ground connection, which makes it ideal for use in applications where it is more likely to come into contact with a member of the public. IEC protection Class II power supplies have a two-wire power cord rather than a three-wire power cord with a safety earth connection.
Surgical equipment typically falls into the category Type BF or Type CF in terms of the IEC 60601 regulations. Surgical devices range from anesthesia delivery, electrosurgery or ablation devices.