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To the Editor:—
Because of the complicating dermatitis that occurs after the use of any adhesive agent, such as tape or the gluelike substance that has been used on the cotton felt rings, the following simple method has proved effective. It eliminates the use of rubber tissue or any agent that might produce a dermatitis through allergy.A circular piece of sterile absorbent cotton about the size of a silver dollar (38 mm.) and from 0.5 to 1 cm. thick is used and the suspected agent is placed on this. If a powder is used, an amount covering an area about 1 cm. square is placed in the center of the cotton; if a liquid is used a small piece of cotton 1 cm. square may be soaked with the agent and placed in the center of the circular pad of cotton.After the skin has been cleansed with ether,
Reynolds HS. A SIMPLE AND EFFICIENT PATCH TEST. JAMA. 1935;104(21):1925. doi:10.1001/jama.1935.02760210057022
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