The test patches are applied for 48 hours and then removed Figs.
Semi-open test Method designed to evaluate products with irritating properties due to the presence of solvents or emulsifiers e.
Contact dermatitis, drug reactions e.
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Although the absorption of substances is minimal and does not compromise the fetus, immunological changes typical of pregnancy interfere with the response to patch testing.
Relevance is determined by exposure to the positive allergen, and is rated as definite, probable, possible, past, or unknown.
The concentration of the allergens to be applied is a controversial issue in the literature, but so far the same allergens are used in both adults and children.
Peters, in , 2008 Percutaneous Screening Test Before implantation of a permanent Bion, a percutaneous test is performed in the office.