Read full definition of a medical device defined by FDA.
In short, a medical device is an instrument, apparatus, implement, machine, contrivance, implant, in vitro reagent, or other similar or related article, including a component part, or accessory.
If it is intended for use in the diagnosis of disease or other conditions, or in the cure, mitigation, treatment, or prevention of disease, it is a medical device.
If it is intended to affect the structure or any function of the body, and which does not achieve its primary intended purposes through chemical action and which is not dependent upon being metabolized for the achievement of its primary intended purposes, it is a medical device.
Medical devices can range from Band-Aids to x-rays. It also includes in vitro diagnostics, software, and mobile applications; as well as items not typically considered medical devices, but because of how it is being used in a study, makes it a medical device. For example, a fitness watch that is being used in a study to reveal a medical or therapeutic change in the subject.
In determining if your product is regulated as a medical device, it may also be helpful to search for existing product classifications that may apply to your product. For more information on how to search, see How to Determine if Your Product is a Medical Device. It is also advised to consult the IRB office prior to submitting your IRB application.