A halfway area of hair loss between normal hair and the balding area of 1.8 cm2 is defined using a stencil template and chosen for clipping. The clipped hairs within the target area are dyed for gray or fair hairs with a commercially available solution in order to enhance their contrast. Thereafter, the dyed hairs are cleansed using an alcoholic solution and digital images are taken by a digital close-up camera while the area is still wet. Images are taken at day 0, immediately after clipping, and 2 days after clipping. These photographs are then examined by a software system able to distinguish individual hair fibers.
Gentle traction is exerted on a cluster of hairs (approximately 60 hairs) in three different areas of the scalp (frontal, temporal and occipital), and the number of extracted hairs is counted. Normally, less than three telogen-phase hairs are expected to be extracted. If at least 3 and/or more than 10 hairs are removed , the pull test out-come is considered positive and suggestive of telogen effluvium.
- Improve hair growth and decrease hair loss
- Digital images
- Clinical evaluations
- Self assesment