The Specific Classification

Ultraviolet lamps intended for treating dermatologic disorders are explicitly classified by the FDA as Class II medical devices. The governing regulation is found in Title 21 of the Code of Federal Regulations, Section 878.4630:

"Ultraviolet lamp for dermatologic disorders. (a) Identification. An ultraviolet lamp for dermatologic disorders is a device (including a fixture) intended to provide ultraviolet radiation of the body to photoactivate a drug in the treatment of a dermatologic disorder..." (b) Classification. Class II. " -4

This classification confirms that any device marketed for treating skin conditions like vitiligo or psoriasis using UV light must obtain FDA clearance before it can be legally sold in the United States.

The 510(k) Pathway for Phototherapy Devices

To obtain clearance, manufacturers must submit a 510(k) application demonstrating that their device is substantially equivalent to a predicate device already on the market. The FDA reviews evidence including:

Wavelength accuracy and stability (308nm ±2nm)
Irradiance output and consistency
Photobiological safety per recognized standards (e.g., IEC 62471 for lamp safety) -8
Electrical safety and electromagnetic compatibility
Labeling and instructions for use
Clinical performance data (often from published literature or predicate device equivalence)

Successful 510(k) submissions result in the device being listed in the FDA's publicly accessible database, and the manufacturer can legally market the device as "FDA-cleared."

Safety Standards for UV Devices

The FDA recognizes specific consensus standards for evaluating the safety of UV-emitting medical devices. One critical standard is IEC 62471:2006, "Photobiological safety of lamps and lamp systems," which provides:

Exposure limits for optical radiation from 200 nm through 3000 nm
Reference measurement techniques
Classification schemes for evaluating photobiological hazards -8

Compliance with such standards is typically part of the 510(k) submission, ensuring that cleared devices meet recognized safety benchmarks.

How 308nm Phototherapy Devices Are Regulated

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