The US Food and Drug Administration definition of a medical device is a device that is "intended for use in the diagnosis of disease or other conditions, or in the cure, mitigation, treatment or prevention of disease, in man or other animals". Seven out of the world's top 10 leading medical device companies are based in the US and include companies such as General Electric, Johnson and Johnson and Covidien.
Plimsoll provide an excellent overview of the industry in "MEDICAL DEVICES (Global) - Industry Report" where the top 500 companies in the sector are analysed.
The Research and Experts platform is the place to start your research when looking for key intelligence on the medical devices industry.
World Medical Device Organisation
Medicines and Healthcare Products Regulatory Agency
Medical Device Manufacturers Association
Food and Drug Administration, Medical Devices