Patch test technique.

摘要

Jadassohn's description of the patch test in 1896 involved the application of a mercury-containing ointment, to which a patient had previously reacted, to an area of skin on the left arm, covered by a 5 cm piece of tape for 24 h, reproducing in miniature the original reaction.Subsequent modifications of the method were often empirical and were concerned with improving usability such as the type of tape and removing colophony from the adhesive, In the initial description, the allergen was applied to the skin and the dose nonstandardized. Later, filter discs were attached to the tape to which the allergen was applied and various chambers developed.