- ICH GCP
- Registro de ensayos clínicos de EE. UU.
- Ensayo clínico NCT03145506
Spectrally Guided Mohs Surgery
Descripción general del estudio
Estado
Condiciones
Intervención / Tratamiento
Descripción detallada
The current standard-of-care in the identification of skin cancer is visual inspection followed by biopsy and histopathology of suspicious skin sites. Since a physician is required to perform this biopsy, there is often a delay in diagnosis, resulting in deeper, more aggressive tumors and increased mortality from malignant melanoma (MM). Therefore, a non-invasive method to inspect these lesions would be of great clinical importance.
An initial prototype of a noninvasive diagnostic device was developed based on optical spectroscopy and completed a clinical study in 76 patients that demonstrated high diagnostic accuracy for the detection of skin cancer (IRB # CR-10-004). This initial prototype consisted of two separate devices and probes: one to collect Raman spectra (RS) and the other to collect diffuse reflectance and laser induced fluorescence spectra (DRS+LIFS). type, but a combination of modalities gave the best diagnostic performance for all types of skin cancer.
The addition of Raman spectroscopy improved diagnostic performance for both melanoma and non-melanoma skin cancer. However, the operation of the integrated systems was still conducted via two optical fiber probes (the first one for fluorescence and reflectance spectroscopy, the second one for Raman spectroscopy). The need to take measurements of the same lesion using two probes increased acquisition time, and the possible sampling site error. Recently, a device was developed that combined fiber optic probe that is capable for spectral acquisition of Raman, white light reflectance and laser induced fluorescence spectroscopy. Using this probe, acquisition time and sampling site error should be reduced. There is no significant difference in terms of performance between the previous two probes and the new probe.
Models have been developed to analyze reflectance and fluorescence spectroscopy data. In order to interpret Raman spectroscopy data in physiologically relevant parameters, a biophysical model needs to be developed. Similar models have been developed by other research groups for other types of tissue.
This study proposes to use the new technique of biophysical modeling to analyze our Raman spectra. At the core of the technique is the measurement of a set of "basis spectra" which are fit to the data using ordinary least-squares. Recently, biophysical models have been developed for atherosclerosis and breast cancer with very impressive diagnostic results, achieving 94% sensitivity and 96% specificity for breast cancer and 94% accuracy for atherosclerosis disease classification.
Raman microspectrometry will be used to measure basis spectra from various skin constituents. In this technique, Raman spectra are measured from freshly frozen tissue samples that are sliced into thin sections as is done in histology. A microscope system is used to focus the excitation laser beam to a small spot of approximately 2 mm in diameter on the sample, and a Raman spectrometer measures the emitted Raman spectrum. In this way, Raman spectra of individual microscopic tissue components can be isolated. These individual component spectra will be determined for keratin, cell nuclei, collagen, cytoplasm, melanin, water, sebaceous glands, etc.
Tipo de estudio
Inscripción (Actual)
Criterios de participación
Criterio de elegibilidad
Edades elegibles para estudiar
Acepta Voluntarios Saludables
Géneros elegibles para el estudio
Método de muestreo
Población de estudio
Descripción
Inclusion Criteria:
- All individuals over 18 undergoing Mohs surgery for treatment of BCC or SCC
Exclusion Criteria:
- Under 18 years old, not undergoing Mohs surgery for treatment of BCC or SCC
Plan de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
- Modelos observacionales: Otro
- Perspectivas temporales: Futuro
Cohortes e Intervenciones
Grupo / Cohorte |
Intervención / Tratamiento |
---|---|
Mohs Surgery Patients
Adult patients undergoing Mohs surgery for treatment of BCC or SCC
|
optical measurement of excised tissue
|
¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
---|---|---|
Sensitivity and specificity of spectroscopic device
Periodo de tiempo: 1 year
|
comparison of spectroscopic data to frozen section pathology used in Mohs surgery
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1 year
|
Colaboradores e Investigadores
Patrocinador
Colaboradores
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio (Actual)
Finalización primaria (Actual)
Finalización del estudio (Actual)
Fechas de registro del estudio
Enviado por primera vez
Primero enviado que cumplió con los criterios de control de calidad
Publicado por primera vez (Actual)
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Más información
Términos relacionados con este estudio
Términos MeSH relevantes adicionales
Otros números de identificación del estudio
- CR-15-117
Plan de datos de participantes individuales (IPD)
¿Planea compartir datos de participantes individuales (IPD)?
Información sobre medicamentos y dispositivos, documentos del estudio
Estudia un producto farmacéutico regulado por la FDA de EE. UU.
Estudia un producto de dispositivo regulado por la FDA de EE. UU.
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