Diode Laser as a Biomarker for Neuropathic Pain of Peripheral Origin. (DLss)
Peripheral Neuropathy
About this trial
This is an interventional basic science trial for Peripheral Neuropathy focused on measuring Biomarker, neuropathic pain, response biomarker
Eligibility Criteria
Inclusion Criteria: Inclusion criteria for Objective 1 (Stanford) 18 -70 years of age no complaints of peripheral neuropathy or other foot pain no medical history of disease or medication use associated with peripheral neuropathy (e.g. diabetes) no known allergy to lidocaine Inclusion Criteria for Objective 2 . 18 years of age and older Length dependent, sensory predominant, peripheral neuropathy from any non-acute acquired cause (e.g. diabetes, pre-diabetes, chemotherapy induced), OR musculoskeletal pain from plantar fasciitis or ankle sprain. Inclusion Criteria for Objective 3 18 years of age and older Length dependent, sensory predominant, peripheral neuropathy from any non-acute acquired cause (e.g. diabetes, pre-diabetes, chemotherapy induced) . Pain rating on Visual Analog Scale (VAS) > 30mm Exclusion Criteria: Exclusion criteria Objective 1 (Stanford) complaints of peripheral neuropathy or other foot pain medical history of disease or medication use associated with peripheral neuropathy (e.g. diabetes) known allergy to lidocaine or other para-aminobenzioc acid derivative (ie: procaine, tetracaine, benzocaine) Exclusion Criteria Objective 2 and 3 Acute peripheral neuropathy (e.g. Guillain Barre Syndrome, glucose correction neuropathy) because of concerns for stability of neuropathic pain over the period of study participation. Bleeding diathesis, or history of severe bleeding with skin wounds. known allergy to lidocaine or other para-aminobenzioc acid derivative (ie: procaine, tetracaine, benzocaine) 4. Taking exclusionary medications related to lidocaine, or with anti-arrhythmic properties, such as tocainide or mexilitine. 5. Severe liver disease 6. People currently receiving chemotherapy. 7. Unable to complete protocol requirements in the judgement of the investigator.-
Sites / Locations
- Stanford UniversityRecruiting
- University of Utah
Arms of the Study
Arm 1
Arm 2
Arm 3
Arm 4
Experimental
Experimental
Active Comparator
Placebo Comparator
Biomarker Optimization (Stanford)
Neuropathy assessment and biomarker testing (Utah)
Crossover testing in participants with painful neuropathy (ZTlido 1.8% lidocaine patch)
Crossover testing in participants with painful neuropathy (placebo patch)
Screening for neuropathy, foot problems and diabetes Diode laser testing of C:Aδ ratio Non-invasive speckle imaging Quantitative sensory testing ZTlido 1.8% lidocaine patch testing in some subjects
History, physical, and neurological exam Nerve conduction study Medical record review of neuropathy history PROMIS pain severity and interference testing Brief pain inventory Norfolk quality of life questionnaire Quantitative sensory testing 3mm skin punch biopsy Diode laser testing of C:Aδ ratio Non-invasive speckle imaging
History, physical, and neurological exam Nerve conduction study Medical record review of neuropathy history PROMIS pain severity and interference testing Brief pain inventory Norfolk quality of life questionnaire Quantitative sensory testing 3mm skin punch biopsy Diode laser testing of C:Aδ ratio Non-invasive speckle imaging ZTlido 1.8% lidocaine patch application to both feet for 7 days up to 12 hours per day.
History, physical, and neurological exam Nerve conduction study Medical record review of neuropathy history PROMIS pain severity and interference testing Brief pain inventory Norfolk quality of life questionnaire Quantitative sensory testing 3mm skin punch biopsy Diode laser testing of C:Aδ ratio Non-invasive speckle imaging Placebo patch application to both feet for 7 days up to 12 hours per day.