wheelchairs Regulatory marking Medical devices must have CE marking, UKCA marking or CE UKNI marking by law. This mark means that, provided you use it correctly, the device will work properly and is safe. No device is 100% safe or reliable., The known risks of complications must be balanced in comparison to the benefits of the device, as stated by the manufacturer. If you have any questions about weighing up the pros and cons of using a device for personal use, please speak to a healthcare professional. Buying medical devices for personal use Before you buy the device Before you buy a medical device for your own use, it’s important to: