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Ozontherapie bij chemotherapie-geïnduceerde perifere neuropathie: RCT (O3NPIQ) (O3NPIQ)

22 september 2026 bijgewerkt door: Bernardino Clavo, MD, PhD

Effectiviteit en kosteneffectiviteit van ozontherapie bij patiënten met pijn secundair aan door chemotherapie geïnduceerde perifere neuropathie. Gerandomiseerde, driedubbelblinde klinische studie (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

Studie Overzicht

Gedetailleerde beschrijving

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.

Studietype

Ingrijpend

Inschrijving (Geschat)

42

Fase

  • Fase 2
  • Fase 3

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studiecontact

Studie Contact Back-up

Studie Locaties

    • Las Palmas
      • Las Palmas de Gran Canaria, Las Palmas, Spanje, 35016
        • Werving
        • Complejo Hospitalario Materno Insular
        • Contact:
      • Las Palmas de Gran Canaria, Las Palmas, Spanje, 35019
        • Werving
        • Hospital Universitario de Gran Canaria Dr. Negrín
        • Contact:
        • Onderonderzoeker:
          • Saray Galván, MD
        • Onderonderzoeker:
          • Francisco Rodríguez-Esparragón, BSc, PhD

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

18 jaar tot 100 jaar (Volwassen, Oudere volwassene)

Accepteert gezonde vrijwilligers

Nee

Geslachten die in aanmerking komen voor studie

Allemaal

Beschrijving

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.

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Behandeling
  • Toewijzing: Gerandomiseerd
  • Interventioneel model: Parallelle opdracht
  • Masker: Verviervoudigen

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: 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.

Andere namen:
  • O3
Placebo-vergelijker: 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.

Andere namen:
  • O2

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Change from Baseline in "Average pain" according to the Brief Pain Inventory-Short Form (BPI-SF) (at the end of ozone therapy)
Tijdsspanne: 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)
Tijdsspanne: 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

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Change from Baseline in quality of life by the "5-level, 5-dimension EuroQol" (EQ-5D-5L) questionnaire (at the end of ozone therapy)
Tijdsspanne: 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)
Tijdsspanne: 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)
Tijdsspanne: 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)
Tijdsspanne: 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)
Tijdsspanne: 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)
Tijdsspanne: 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)
Tijdsspanne: 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)
Tijdsspanne: 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)
Tijdsspanne: 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)
Tijdsspanne: 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)
Tijdsspanne: 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)
Tijdsspanne: 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)
Tijdsspanne: 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)
Tijdsspanne: 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)
Tijdsspanne: 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)
Tijdsspanne: 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)
Tijdsspanne: 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)
Tijdsspanne: 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

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Onderzoekers

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

Publicaties en nuttige links

De persoon die verantwoordelijk is voor het invoeren van informatie over het onderzoek stelt deze publicaties vrijwillig ter beschikking. Dit kan gaan over alles wat met het onderzoek te maken heeft.

Algemene publicaties

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Werkelijk)

30 november 2020

Primaire voltooiing (Geschat)

30 september 2027

Studie voltooiing (Geschat)

31 december 2027

Studieregistratiedata

Eerst ingediend

5 maart 2020

Eerst ingediend dat voldeed aan de QC-criteria

6 maart 2020

Eerst geplaatst (Werkelijk)

9 maart 2020

Updates van studierecords

Laatste update geplaatst (Werkelijk)

25 september 2026

Laatste update ingediend die voldeed aan QC-criteria

22 september 2026

Laatst geverifieerd

1 september 2026

Meer informatie

Termen gerelateerd aan deze studie

Andere studie-ID-nummers

  • 2018-156-1
  • PI 19/00458 (Ander subsidie-/financieringsnummer: Instituto de Salud Carlos III)
  • 016/2019 (Ander subsidie-/financieringsnummer: Fundación DISA)
  • BF1-19-03 (Ander subsidie-/financieringsnummer: Fundación Española del Dolor (FED))
  • 2019 (Subsidie/contract van de Amerikaanse NIH)
  • 2019-000821-37 (EudraCT-nummer)

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

NEE

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .

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