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Evaluation of Cohen's cross-section trichometer for measuring hair quantity
Maria A E Hendriks1, Paulus A F Geerts, Marcus W Dercksen
1Department of Medicine, University of Maastricht, Maastricht, The Netherlands. marij.hendriks@hotmail.com
Summary
A new cross-section trichometer offers a simple, reliable method for measuring hair quantity. This device demonstrated high reproducibility in clinical testing, showing promise for various applications.
Area of Science:
- Dermatology
- Trichology
- Medical Device Technology
Background:
- Clinical hair quantity measurement lacks reliable and simple methods.
- The recently introduced cross-section trichometer by Cohen presents a potential solution.
Purpose of the Study:
- To evaluate the clinical utility and reproducibility of the cross-section trichometer for hair quantity measurement.
Main Methods:
- The hair mass index (HMI) was calculated as the ratio of hair cross-sectional area to the skin area from which it was taken.
- Intra- and interobserver reproducibility were assessed, including measurements with and without relocation.
Main Results:
- High reproducibility was observed for intraobserver (r=0.99) and interobserver (r=0.98) measurements.
- Measurements with relocation also showed good reproducibility (r=0.97).
- The procedure was quick, taking 5-10 minutes per area.
Conclusions:
- The cross-section trichometer provides a simple and highly reproducible method for measuring hair quantity.
- This device shows significant promise for clinical and research applications in hair studies.
