Medical devices can be complex and may require users to understand specific information about storage, use, disposal, or reprocessing. Although it is optimal to guide the use of devices via intuitive design to the greatest extent possible, manufacturers may have to rely on instructional materials to convey important information supporting safe and effective product use. Instructions for use (IFU) are therefore considered part of the product user interface.
Although this article USA focussed, this information can also be used/attributed to the design of your training courses and material for medical device trainers. follow this link