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Ozonoterapia en la neuropatía periférica inducida por quimioterapia: ECA (O3NPIQ) (O3NPIQ)

22 de septiembre de 2026 actualizado por: Bernardino Clavo, MD, PhD

Eficacia y coste-efectividad de la ozonoterapia en pacientes con dolor secundario a neuropatía periférica inducida por quimioterapia. Ensayo clínico aleatorizado, triple ciego (O3NPIQ)

The main objective of this clinical trial is to evaluate the effectiveness and cost-effectiveness of adding ozone therapy to the clinical management of patients with pain secondary to chemotherapy-induced peripheral neuropathy

Descripción general del estudio

Estado

Reclutamiento

Condiciones

Intervención / Tratamiento

Descripción detallada

Chemotherapy-induced peripheral neuropathy (CIPN) decreases the quality of life of patients and can lead to a decrease and/or interruption of the chemotherapy treatment-limiting its effectiveness. The therapeutic measures for the CIPN are very limited in their number and efficacy.

Main Objectives: 1) To evaluate the clinical effect on the health-related quality of life (HRQOL) of adding ozone to the usual patient´s treatment with persistent pain because of CIPN. 2) Estimate the additional costs and evaluate the cost-effectiveness ratio.

Secondary Objectives: To evaluate the evolution of 3) oxidative stress and chronic inflammation through biochemical measurements; 4) anxiety and depression of patients; 5) the diagnostic and predictive value of hyperspectral imaging in the assessment of pain; 6) the acceptability of patients to a shared decision-making (SDM) tool.

METHODOLOGY: Randomized controlled trial (RCT) phase II-III, randomized, triple-blind; 42 patients with any kind of cancer treated with any kind of chemotherapy, with CIPN of grade > = 2 for > = 3 months.

TREATMENT: All patients will receive: usual treatment + 40 rectal insufflation sessions of O3/O2 in 16 weeks:

  • Ozone-Arm (n = 21): concentration of O3/O2 increasing from 10 to 30 μg/ml.
  • Control-placebo- Arm (n = 21): concentration of O3/O2 = 0 μg/ml.

Main Variables: At the end of treatment with O3/O2 the following variables will be analyzed: 1) "average pain" secondary to CIPN following the Brief Pain Inventory-Short Form (BPI-SF); 2) health-related quality of life (HRQOL) and utilities using EQ-5D-5L and SF-36 quality of life questionnaires; 3) Direct costs.

Secondary Variables: 3) biochemical parameters of oxidative stress and inflammation; 4) Hamilton scale for anxiety and depression; 5) hyperspectral images; 6) acceptability of patients to a shared decision-making (SDM) tool.

Assessments at weeks: 0 (baseline), 16 (end of O3/O2 insufflations, objective), and 28 (end of follow-up, control).

Length of treatment: 16 weeks.

Follow-up: 12 weeks after finishing O3/O2 insufflation.

Planned length of the clinical trial: 36 months.

Tipo de estudio

Intervencionista

Inscripción (Estimado)

42

Fase

  • Fase 2
  • Fase 3

Contactos y Ubicaciones

Esta sección proporciona los datos de contacto de quienes realizan el estudio e información sobre dónde se lleva a cabo este estudio.

Estudio Contacto

Copia de seguridad de contactos de estudio

Ubicaciones de estudio

    • Las Palmas
      • Las Palmas de Gran Canaria, Las Palmas, España, 35016
        • Reclutamiento
        • Complejo Hospitalario Materno Insular
        • Contacto:
      • Las Palmas de Gran Canaria, Las Palmas, España, 35019
        • Reclutamiento
        • Hospital Universitario de Gran Canaria Dr. Negrín
        • Contacto:
        • Sub-Investigador:
          • Saray Galván, MD
        • Sub-Investigador:
          • Francisco Rodríguez-Esparragón, BSc, PhD

Criterios de participación

Los investigadores buscan personas que se ajusten a una determinada descripción, denominada criterio de elegibilidad. Algunos ejemplos de estos criterios son el estado de salud general de una persona o tratamientos previos.

Criterio de elegibilidad

Edades elegibles para estudiar

18 años a 100 años (Adulto, Adulto Mayor)

Acepta Voluntarios Saludables

No

Géneros elegibles para el estudio

Todos

Descripción

Inclusion Criteria:

  • 1. Adults > = 18 years old.
  • 2. Any kind of cancer in any stage, treated with any kind of chemotherapy, and life expectancy > = 6 months.
  • 3. Clinical diagnosis of painful chemotherapy-induced peripheral neuropathy, toxicity Grade 2 or higher according to the Common Toxicity Criteria for Adverse Events (CTCAE) from the National Cancer Institute of EEUU, v.5.0, for > = 3 months and without the inclusion of new treatments for pain and/or neuropathy for > = 1 month.
  • 4. "Average pain" > = 3/10 according to the Brief Pain Inventory-Short Form (BPI-SF) > = 3 months beyond chemotherapy completion.
  • 5. Pregnant women cannot participate in the clinical trial.
  • 6. Before enrollment, women of childbearing potential should obtain a negative result in the serum or urine pregnancy test at the screening visit and accept the use of appropriate contraceptive methods at least from the 14 days prior to the first ozone therapy session up to 14 days after the last one.
  • 7. Patients who have signed and dated the study 's specific informed consent

Exclusion Criteria:

  • 1. Age < 18 years old.
  • 2. Pregnancy at the time of enrollment.
  • 3. Women with childbearing potential who are unwilling to perform a pregnancy test and/or employ adequate contraception from the 14 days prior to the first ozone therapy session up to 14 days after the last one.
  • 4. Clinical suspicion that peripheral neuropathy (compressive or diabetic neuropathy) in the same area prior to receiving neurotoxic chemotherapy.
  • 5. Psychiatric illness or social situations that would limit compliance with study requirements.
  • 6. Those who are unable to fill in the scales used to measure quality of life variables
  • 7. Specific liver enzymes [Aspartate Aminotransferase (AST), and Alanine Aminotransferase (ALT) > 5 times the upper limit of normal
  • 8. Increased creatinine > 3 times the upper limit of normal.
  • 9. Hemodynamically or clinically unstable patients or uncontrolled severe illness.
  • 10. Uncontrolled cancer disease.
  • 11. Leptomeningeal carcinomatosis.
  • 12. Life expectancy < 6 months
  • 13. Contraindication or disability for rectal ozone administration or to attend scheduled treatments.
  • 14. Known allergy to ozone.
  • 15.Patients who do not meet all the inclusion criteria.

Plan de estudios

Esta sección proporciona detalles del plan de estudio, incluido cómo está diseñado el estudio y qué mide el estudio.

¿Cómo está diseñado el estudio?

Detalles de diseño

  • Propósito principal: Tratamiento
  • Asignación: Aleatorizado
  • Modelo Intervencionista: Asignación paralela
  • Enmascaramiento: Cuadruplicar

Armas e Intervenciones

Grupo de participantes/brazo
Intervención / Tratamiento
Experimental: Ozone Group

Drug: Ozone Ozone Group: Usual treatment + Ozone therapy (O3/O2) by rectal insufflation. O3/O2 concentration progressively increased from 10 to 30 μg/ml; 40 sessions in 16 weeks.

Other Names: O3

Ozone Group: Standard treatment + Ozone therapy (O3/O2) by rectal insufflation. O3/O2 concentration progressively increased from 10 to 30 μg/ml; 40 sessions in 16 weeks.

Otros nombres:
  • O3
Comparador de placebos: Control Group

Drug: Oxygen Control Group: Standard treatment + Oxygen (O2) by rectal insufflation. O3/O2 concentration = 0 μg/ml (only O2); 40 sessions in 16 weeks.

Other Names: O2

Control Group: Standard treatment + Oxygen (O2) by rectal insufflation. O3/O2 concentration = 0 μg/ml (only O2); 40 sessions in 16 weeks.

Otros nombres:
  • O2

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Change from Baseline in "Average pain" according to the Brief Pain Inventory-Short Form (BPI-SF) (at the end of ozone therapy)
Periodo de tiempo: 16 weeks

Self-reported evaluation of 15 items to assess the severity of pain on daily functions in seven interference areas. From the 15 items, 11 items are scored from 0 ("No pain" or "Does not no interfere") to 10 ("Pain as bad as you can imagine" or "Completely interferes").

16 weeks
Direct Hospital Cost (at the end of ozone therapy)
Periodo de tiempo: 16 weeks

The direct expenses incurred by the hospital in providing services (medication, tests, medical visits...) during the 16 weeks of ozone therapy (in euros).

16 weeks

Medidas de resultado secundarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Change from Baseline in quality of life by the "5-level, 5-dimension EuroQol" (EQ-5D-5L) questionnaire (at the end of ozone therapy)
Periodo de tiempo: 16 weeks

Self-reported evaluation of: a) 5 physical and emotional items scored in five levels, from 1 (best: I have no problem) to 5 (worst: I have extreme problem or I am unable to…) and b) additional self-assessment of health by a visual analogue scale (0 = worst health patient can imagine, 100 = best health patient can imagine)

16 weeks
Change from Baseline in quality of life by the "Short Form 36-item health survey" (SF-36v2) questionnaire (at the end of ozone therapy)
Periodo de tiempo: 16 weeks

Self-reported evaluation of 36 items (0 = worst, 100 = best). Final accumulated total range from 0 (worst) to 100 (best)

16 weeks
Change from Baseline in Biochemical parameters of oxidative stress (at the end of ozone therapy)
Periodo de tiempo: 16 weeks

Serum levels of superoxide dismutase, glutathione, glutathione peroxidase and free radicals

16 weeks
Change from Baseline in Biochemical parameters of inflammation (at the end of ozone therapy)
Periodo de tiempo: 16 weeks

Serum levels of pro-inflammatory interleukins and TNFalpha

16 weeks
Change from Baseline in Hyperspectral image of painful area (at the end of ozone therapy)
Periodo de tiempo: 16 weeks

Assessment of the percentage of reflectance for each wavelength

16 weeks
Change from Baseline in Levels of anxiety and depression according to the Hamilton scale (at the end of ozone therapy)
Periodo de tiempo: 16 weeks

Clinician-administered depression assessment scale with 17 items pertaining to symptoms of depression experienced over the past week. Each item is scored from 0 (better, no alteration) to 2 (worse level of alteration) for items with three options, or from or from 0 (better, no alteration) to 4 (worse level of alteration) for items with five options. Overall score is from 0 (better, no anxiety/depression) to 52 (worse, very severe anxiety/depression).

16 weeks
Change from Baseline in Nerve conduction studies in the painful area (at the end of ozone therapy)
Periodo de tiempo: 16 weeks

Assessment of nerve conduction velocity (in m/s)

16 weeks
Incidence of severe adverse events in accordance with the definition of the Council for International Organizations of Medical Sciences (at the end of ozone therapy)
Periodo de tiempo: 16 weeks

Number of events that are fatal, life threatening, leading to or prolonging a stay in hospital, or resulting in severe disability

16 weeks
Change from Baseline in "Average pain" according to the Brief Pain Inventory-Short Form (BPI-SF) (at 12 weeks after the end of ozone therapy)
Periodo de tiempo: 28 weeks

Self-reported evaluation of 15 items to assess the severity of pain on daily functions in seven interference areas. From the 15 items, 11 items are scored from 0 ("No pain" or "Does not no interfere") to 10 ("Pain as bad as you can imagine" or "Completely interferes")

28 weeks
Direct Hospital Cost (at 12 weeks after the end of ozone therapy)
Periodo de tiempo: 28 weeks

The direct expenses incurred by the hospital in providing services (medication, tests, medical visits...) during the 16 weeks of ozone therapy (in euros)

28 weeks
Change from Baseline in quality of life by the "5-level, 5-dimension EuroQol" (EQ-5D-5L) questionnaire (at 12 weeks after the end of ozone therapy)
Periodo de tiempo: 28 weeks

Self-reported evaluation of: a) 5 physical and emotional items scored in five levels, from 1 (best: I have no problem) to 5 (worst: I have extreme problem or I am unable to…) and b) additional self-assessment of health by a visual analogue scale (0 = worst health patient can imagine, 100 = best health patient can imagine)

28 weeks
Change from Baseline in quality of life by the "Short Form 36-item health survey" (SF-36v2) questionnaire (at 12 weeks after the end of ozone therapy)
Periodo de tiempo: 28 weeks

Self-reported evaluation of 36 items (0 = worst, 100 = best). Final accumulated total range from 0 (worst) to 100 (best)

28 weeks
Change from Baseline in Biochemical parameters of oxidative stress (at 12 weeks after the end of ozone therapy)
Periodo de tiempo: 28 weeks

Serum levels of superoxide dismutase, glutathione, glutathione peroxidase and free radicals

28 weeks
Change from Baseline in Biochemical parameters of inflammation (at 12 weeks after the end of ozone therapy)
Periodo de tiempo: 28 weeks

Serum levels of pro-inflammatory interleukins and TNFalpha

28 weeks
Change from Baseline in Hyperspectral image of painful area (at 12 weeks after the end of ozone therapy)
Periodo de tiempo: 28 weeks

Assessment of the percentage of reflectance for each wavelength

28 weeks
Change from Baseline in Levels of anxiety and depression according to the Hamilton scale (at 12 weeks after the end of ozone therapy)
Periodo de tiempo: 28 weeks

Clinician-administered depression assessment scale with 17 items pertaining to symptoms of depression experienced over the past week. Each item is scored from 0 (better, no alteration) to 2 (worse level of alteration) for items with three options, or from or from 0 (better, no alteration) to 4 (worse level of alteration) for items with five options. Overall score is from 0 (better, no anxiety/depression) to 52 (worse, very severe anxiety/depression)

28 weeks
Change from Baseline in Nerve conduction studies in the painful area (at 12 weeks after the end of ozone therapy)
Periodo de tiempo: 28 weeks

Assessment of nerve conduction velocity (in m/s)

28 weeks
Incidence of severe adverse events in accordance with the definition of the Council for International Organizations of Medical Sciences (at 12 weeks after the end of ozone therapy)
Periodo de tiempo: 28 weeks

Number of events that are fatal, life threatening, leading to or prolonging a stay in hospital, or resulting in severe disability

28 weeks

Colaboradores e Investigadores

Aquí es donde encontrará personas y organizaciones involucradas en este estudio.

Patrocinador

Colaboradores

Investigadores

  • Silla de estudio: Bernardino Clavo, MD, PhD, Dr. Negrín University Hospital, Las Palmas, Spain
  • Director de estudio: Pedro G Serrano-Aguilar, MD, PhD, Servicio de Evaluación. Servicio Canario de Salud. Spain
  • Investigador principal: Delvys Rodríguez-Abreu, MD, Complejo Hospitalario Universitario Insular Materno Infantil, Las Palmas, Spain
  • Investigador principal: Gustavo M Callico, Prof, PhD, Institute for Applied Microelectronics, University of Las Palmas de G. C., Spain
  • Investigador principal: Francisco Rodríguez-Esparragón, BSc, PhD, Dr. Negrín University Hospital, Las Palmas, Spain
  • Investigador principal: Bernardino Clavo, MD, PhD, Dr. Negrín University Hospital, Las Palmas, Spain

Publicaciones y enlaces útiles

La persona responsable de ingresar información sobre el estudio proporciona voluntariamente estas publicaciones. Estos pueden ser sobre cualquier cosa relacionada con el estudio.

Publicaciones Generales

Fechas de registro del estudio

Estas fechas rastrean el progreso del registro del estudio y los envíos de resultados resumidos a ClinicalTrials.gov. Los registros del estudio y los resultados informados son revisados ​​por la Biblioteca Nacional de Medicina (NLM) para asegurarse de que cumplan con los estándares de control de calidad específicos antes de publicarlos en el sitio web público.

Fechas importantes del estudio

Inicio del estudio (Actual)

30 de noviembre de 2020

Finalización primaria (Estimado)

30 de septiembre de 2027

Finalización del estudio (Estimado)

31 de diciembre de 2027

Fechas de registro del estudio

Enviado por primera vez

5 de marzo de 2020

Primero enviado que cumplió con los criterios de control de calidad

6 de marzo de 2020

Publicado por primera vez (Actual)

9 de marzo de 2020

Actualizaciones de registros de estudio

Última actualización publicada (Actual)

25 de septiembre de 2026

Última actualización enviada que cumplió con los criterios de control de calidad

22 de septiembre de 2026

Última verificación

1 de septiembre de 2026

Más información

Términos relacionados con este estudio

Otros números de identificación del estudio

  • 2018-156-1
  • PI 19/00458 (Otro número de subvención/financiamiento: Instituto de Salud Carlos III)
  • 016/2019 (Otro número de subvención/financiamiento: Fundación DISA)
  • BF1-19-03 (Otro número de subvención/financiamiento: Fundación Española del Dolor (FED))
  • 2019 (Subvención/contrato del NIH de EE. UU.)
  • 2019-000821-37 (Número EudraCT)

Plan de datos de participantes individuales (IPD)

¿Planea compartir datos de participantes individuales (IPD)?

NO

Información sobre medicamentos y dispositivos, documentos del estudio

Estudia un producto farmacéutico regulado por la FDA de EE. UU.

No

Estudia un producto de dispositivo regulado por la FDA de EE. UU.

No

Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .