The Cross-Section Trichometer: A Device for Measuring Hair Quantity, Loss, and Growth

In 2008, Dr. Bernard Cohen developed the Cross-section Trichometer, a device for measuring hair quantity, hair loss, and hair growth by assessing the cross-sectional area of hair bundles. The device was tested on hair and surgical silk fibers, showing a direct correlation between the cross-sectional area and various parameters such as the number of filaments, filament diameter, and dry weight. A study involving 12 male balding patients found a correlation between the trichometric index (TI) and the severity of hair loss. The trichometer, which requires no physician supervision and is used on uncut hair longer than 1 inch, was found to be a promising tool for measuring hair mass, diameter, and density, with the potential for various clinical applications. However, the study highlighted the need for formal clinical studies and careful sampling methods to ensure accuracy and reproducibility. Dr. Cohen holds patents on the method and device.