Medical devices are defined by the US Food and Drug Administration (FDA) as any object or component used in diagnosis, treatment, prevention, or cure of medical conditions or diseases, or affects body structure or function through means other than chemical or metabolic reaction in humans or animals.[2] This includes all medical tools, excluding drugs, ranging from tongue depressors to Computerized Axial Tomography (CAT) scanners to radiology treatments. Because of the wide variety of equipment classified as medical devices, the FDA has no single standard to which a specific device must be manufactured; instead they have created an encompassing guide that all manufacturers must follow. Manufacturers are required to develop comprehensive procedures within the FDA framework in order to produce a specific device to approved safety standards.