Device for collecting a fraction of the perspiration excreted by a subject

A device for collecting a fraction of the perspiration excreted by a subject, said device being of the type comprising a flexible patch, which comprises a lower face and means of attachment;

• of said patch on the skin of said subject, characterized in that said patch is a multilayer patch and in that the patch includes:
• a first layer, the lower face of which forms at least partially the lower face of said patch, said first layer including at least one perforation defining a perspiration-collecting aperture able to be brought into direct contact with the skin of the subject, and a transfer opening;
• a hydrophilic absorbent layer arranged above said first layer and communicating with the exterior environment, said absorbent layer communicating with said first layer through said transfer opening;
• a film, which can be transparent, if appropriate, and impervious to water and vapor, covering at least the upper face of said absorbent layer;
• and in that said device further includes means of regulating the flow-rate of liquid and/or vapor perspiration penetrating into said absorbent layer and means of releasing the air contained in said absorbent layer to the outside of said device.