Spectrophotometric determination of psoriasis erythema
DOI:
https://doi.org/10.29176/2590843X.280Keywords:
Psoriasis, erythema, reflection spectrophotometryAbstract
Introduction: Psoriasis is an erythematous scaly disease characterized by three physical parameters: erythema, thickness and scaling. Erythema is a determining parameter when evaluating disease activity and may be documented through non-invasive optical techniques. Objective: To measure the grade of erythema in lesions of patients with psoriasis, using diffuse spectrophotometry reflectance. Materials and methods: We carried out a prospective observational quasiexperimental study with an intentional sample of 20 lesions, in varying degrees, of patients diagnosed with psoriasis who consulted the Service of Dermatology, Ciudad Hospitalaria “Dr. Enrique Tejera”, Valencia, Venezuela. For data collection a Hunterlab MiniScan®XE Plus spectrophotometer was used. Results: We observed a direct relationship between the degree of erythema and the slope of the reflectance in the 600-700 nm spectral range. Conclusion: The technique allows to quantify the physical variations of the erythema (color variations), allowing to establish a methodology for the control of psoriasis patients.
Author Biographies
Clara Inés Martínez
Médico, residente de posgrado de Dermatología, Ciudad Hospitalaria “Dr. Enrique Tejera”, Facultad de Ciencias de la Salud, Universidad de Carabobo, Valencia, Venezuela.
Elsa María Pardo
Médico, residente de posgrado de Dermatología, Ciudad Hospitalaria “Dr. Enrique Tejera”, Facultad de Ciencias de la Salud, Universidad de Carabobo, Valencia, Venezuela.
Iriana José Álvarez
Médico, residente de posgrado de Dermatología, Ciudad Hospitalaria “Dr. Enrique Tejera”, Facultad de Ciencias de la Salud, Universidad de Carabobo, Valencia, Venezuela.
Aarón Muñoz
Licenciado en Física, maestría y doctorado en Ciencias Básicas, con especialidad en Óptica; director general, Centro de Investigaciones Médicas y Biotecnológicas de la Universidad de Carabobo, CIMBUC; profesor asociado, Universidad de Carabobo, Valencia, Venezuela.
Sandra Carlina Vivas
Médica dermatóloga; jefe, coordinadora del posgrado de Dermatología, Universidad de Carabobo, Valencia, Venezuela.
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