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Overlay Application

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Training Modules

It has long been recognised that drugs of abuse can be detected in perspiration. However, prior to the development of the PharmChek® Sweat Patch, there wasn’t a convenient or consistent method for collecting sweat for analysis.

The PharmChek® Sweat Patch resembles a large plaster and is engineered as a collector for the non-volatile elements in sweat, including drugs of abuse. PharmChek® comprises an adhesive plastic film which secures an absorbent pad against the skin. This adhesive film is a semi-permeable membrane, permitting oxygen, carbon dioxide, and water vapour to pass, thus allowing the skin to breathe normally. Larger molecules, such as drugs, are captured in the absorbent pad within the patch. Environmental contaminants cannot breach the adhesive barrier from the outside, ensuring the patch can be worn during usual activities.

Instructions

The Overlay should be applied concurrently with the Sweat Patch. Detach the backing from the overlay and position it over the Sweat Patch. Firmly press the overlay onto the skin. Using your thumbs and index fingers, rub the entire surface of the overlay for 10 to 15 seconds to guarantee complete adhesion to the skin.

Locate the slit in the border around the outside of the Overlay. While peeling away the border gently, rub the corners of the film to ensure it is securely adhered to the skin. This action helps to press the edges of the patch firmly against the skin, ensuring strong attachment. After the overlay is in place, the client can relax their arm.

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