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Updated: Jul 13, 2026

Minimal Erythema Dose (MED) Testing
06:24

Minimal Erythema Dose (MED) Testing

Published on: May 28, 2013

Med estimation for narrow band UV-B on type IV and type V skin in India

G S Pai1

  • 1Department of Dermatology, Kasturba Medical College, Mangalore, India.

Indian Journal of Dermatology, Venereology and Leprology
|August 1, 2007
PubMed

With an aim to determine minimum erythema dose of narrow band UV-B, 30 subjects, 20 with type I V skin and 10 with type V skin were subjected to graded incremental doses of 311-narrow band UV-B phototherapy cabinet by Daavlin. Barely perceptible erythema 24 hrs after exposure was taken as MED. 33.3% developed erythema at 745mj, 26.6% at 620mj, 23.3% at 1075mj, and 10% at 1290mj. The average MED for narrow band UV-B exposure for type I V skin was 600mj, [range 515-755mj] and for type V skin 1100 mj [range 895-1290mj] Better therapeutic response can be obtained by approximately 360 -450mj as initial irradiation dose for type IV skin and 600-825mj for type V skin.

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