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Leczenie ozonem w parestezjach (drętwienie, mrowienie) w następstwie neuropatii obwodowej wywołanej chemioterapią: RCT. (OzoParQT)

15 września 2026 zaktualizowane przez: Bernardino Clavo, MD, PhD

Skuteczność i opłacalność leczenia ozonem u pacjentów z parestezjami (drętwienie, mrowienie) wtórnymi do neuropatii obwodowej wywołanej chemioterapią. Randomizowane, potrójnie ślepe badanie kliniczne (OzoParQT).

The goal of this phase II/III randomized clinical trial is to evaluate the effect of adding rectal ozone therapy to the usual management of patients with paresthesia (numbness and/or tingling) due to chemotherapy-induced peripheral neuropathy (CIPN). Ozone treatment consists of the rectal insufflation of 180 - 300 milliliters of an ozone/oxygen gas mixture.

The main questions to answer are:

  1. Can ozone therapy improve patients' self-perceived level of numbness and tingling?
  2. Can ozone therapy improve patients' self-perceived health-related quality of life (HRQoL)?

In 42 patients with chronic numbness and tingling secondary to chemotherapy, the researchers will compare:

  • the addition of rectal ozone insufflations
  • versus the addition of rectal oxygen insufflations (placebo). Participants will receive 40 rectal gas (ozone versus oxygen) insufflations in 16 weeks and will continue other symptomatic or cancer treatments prescribed by their oncologists.

Before treatment, after treatment, and 12 weeks after treatment, they will be evaluated:

  • Several questionnaires about neuropathy, quality of life, and anxiety and depression.
  • Biochemical parameters of oxidative stress and inflammation
  • Hyperspectral images of hands and feet
  • Toxicity of procedure.

Przegląd badań

Status

Rekrutacyjny

Warunki

Interwencja / Leczenie

Szczegółowy opis

Rationale Chemotherapy-induced peripheral neuropathy (CIPN) can lead to a decrease and/or interruption of chemotherapy treatment, limiting its efficacy and decreasing patients' quality of life. Therapeutic measures for CIPN are very limited in number and efficacy. Our previous experience has suggested the potential clinical usefulness of adjuvant treatment with ozone in patients with CIPN. The hypothesis of the trial is that ozone treatment will improve numbness and tingling symptoms in patients with CIPN.

Primary objectives:

To evaluate the effect of adding ozone to the usual management of patients with paresthesia (numbness and/or tingling) due to chemotherapy-induced peripheral neuropathy (CIPN), Grade 2 (moderate symptoms and/or limitation in instrumental activities of daily living) or higher, on:

  1. patients' self-perceived level of paresthesia
  2. patients' self-perceived health-related quality of life (HRQoL).

Secondary objectives:

To evaluate (in patients with numbness and/or tingling secondary to CIPN) the effect of adding ozone to the usual management on:

  1. the additional direct costs incurred in the application of ozone and evaluate the cost-effectiveness of the administration of ozone in these patients in comparison with the usual exclusive treatment.
  2. the evolution of the sensory neuropathy
  3. the evolution of the level of anxiety and depression,
  4. the evolution of biochemical parameters related to oxidative stress and chronic inflammation.
  5. the evolution of hyperspectral signatures obtained from hands and feet.
  6. to evaluate the toxicity of rectal ozone treatment in these patients.

Main trial endpoints.

  1. Percentage of change from baseline in "numbness and tingling" self-perceived by patients at the end of follow-up (week 28 after the commencement of ozone treatment)
  2. Change from baseline in "quality of life" (using the EQ-5D-5L questionnaire) self-perceived by patients at the end of follow-up (week 28 after the commencement of ozone treatment)

Secondary trial endpoints.

To evaluate the percentage of change from baseline in all the secondary objectives:

  • at the end of ozone treatment (weeks 16)
  • and at the end of follow-up (week 28)

Trial design. Phase II-III randomized triple-blind clinical trial. The duration of each patient in the study will be 28 weeks: 16 weeks of treatment and 12 weeks of follow-up. The planned total duration of the project is 60 months.

Trial population. 42 adult patients (>= 18 years old), with any tumor, with paresthesias (numbness and/or tingling) due to CIPN, grade of toxicity >= 2 (according to the Common Toxicity Criteria for Adverse Events (CTCAE) from the National Cancer Institute of EEUU, v.5.0), for >= 3 months.

Intervention.

All patients will receive the usual management and treatment for their symptoms + "40 sessions of rectal insufflation of O3/O2 gas mixture" in 16 weeks (3 or 2 sessions per week):

  • Ozone group, O3/O2 concentration increasing from 10 to 30 µg/mL (µg of O3 by mL of O2).
  • Control-placebo group, O3/O2 concentration = 0 µg/mL (this is: only O2).

Typ studiów

Interwencyjne

Zapisy (Szacowany)

42

Faza

  • Faza 2
  • Faza 3

Kontakty i lokalizacje

Ta sekcja zawiera dane kontaktowe osób prowadzących badanie oraz informacje o tym, gdzie badanie jest przeprowadzane.

Kontakt w sprawie studiów

Kopia zapasowa kontaktu do badania

  • Nazwa: Francisco Rodríguez-Esparragón, BSc, PhD
  • Numer telefonu: 34928449288
  • E-mail: afrodesp@gmail.com

Lokalizacje studiów

    • Las Palmas
      • Las Palmas, Las Palmas, Hiszpania, 35019
        • Rekrutacyjny
        • Dr. Negrín University Hospital
        • Kontakt:
        • Kontakt:
          • Francisco Rodríguez-Esparragón, BSc, PhD
          • Numer telefonu: 34928449288
          • E-mail: afrodesp@gmail.com
        • Główny śledczy:
          • Bernardino Clavo, MD, PhD
        • Główny śledczy:
          • Francisco Rodríguez-Esparragón, BSc, PhD

Kryteria uczestnictwa

Badacze szukają osób, które pasują do określonego opisu, zwanego kryteriami kwalifikacyjnymi. Niektóre przykłady tych kryteriów to ogólny stan zdrowia danej osoby lub wcześniejsze leczenie.

Kryteria kwalifikacji

Wiek uprawniający do nauki

18 lat i starsze (Dorosły, Starszy dorosły)

Akceptuje zdrowych ochotników

Nie

Płeć kwalifikująca się do nauki

Wszystko

Opis

Inclusion Criteria:

  • 1. Adults > = 18 years old.
  • 2. Previous treatment with any chemotherapy because of any tumor.
  • 3. Clinical diagnosis of paresthesia (numbness, tingling) secondary to CIPN, with toxicity Grade > = 2 (according to the Common Toxicity Criteria for Adverse Events (CTCAE) from the National Cancer Institute of EEUU, v.5.0) for > = 3 months.
  • 4. Without neurotoxic chemotherapy > = 3 months.
  • 5. Cancer disease is stable or in remission.
  • 6. Life expectancy > = 6 months.
  • 7. 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 14 days before the first ozone therapy session up to 14 days after the last one.
  • 8. To sign and date the study-specific informed consent

Exclusion Criteria:

  • 1. Age < 18 years.
  • 2. A woman who is lactating, pregnant, suspected of being pregnant, or a woman of childbearing potential who does not use adequate contraceptive methods.
  • 3. Suspected symptoms are due to diabetic or compressive neuropathy.
  • 4. Severe psychiatric disorders.
  • 5. Inability to complete the quality of life questionnaires.
  • 6. Elevation above 5 times the maximum limit of normal creatinine.
  • 7. Patient who is hemodynamic or clinically unstable or who requires urgent or short-term interventional measures.
  • 8. Neoplasia in progression requiring recent initiation of systemic treatment or maintenance with neurotoxic chemotherapy.
  • 9. Life expectancy (for any reason) < 6 months.
  • 10. Known allergy to ozone, known glucose 6 phosphate dehydrogenase (G6PD) deficiency, or hemochromatosis.
  • 11. Contraindications or impossibility for rectal ozone treatment or to attend regularly to the treatment.
  • 12. Not meeting each and every one of the inclusion criteria

Plan studiów

Ta sekcja zawiera szczegółowe informacje na temat planu badania, w tym sposób zaprojektowania badania i jego pomiary.

Jak projektuje się badanie?

Szczegóły projektu

  • Główny cel: Leczenie
  • Przydział: Randomizowane
  • Model interwencyjny: Przydział równoległy
  • Maskowanie: Potroić

Broń i interwencje

Grupa uczestników / Arm
Interwencja / Leczenie
Eksperymentalny: Ozone Group

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

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

Inne nazwy:
  • O3
  • Leczenie ozonem
  • Mieszanka gazowa O3/O2
Komparator placebo: Oxygen Group (Placebo)

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

Usual treatment (by their oncologist or hematologist) + Oxygen by rectal insufflation. O3/O2 concentration = 0 μg/ml (only O2); 40 sessions in 16 weeks.

Inne nazwy:
  • O2

Co mierzy badanie?

Podstawowe miary wyniku

Miara wyniku
Opis środka
Ramy czasowe
Change from baseline in "numbness and tingling" self-perceived by patients at the end of follow-up (week 28 after the commencement of ozone treatment)
Ramy czasowe: 28 weeks

Self-reported evaluation of the percentage of "numbness and/or tingling" regarding the basal level. From 100% (basal level, 0% improvement) to 0% (no numbness and tingling, 100% improvement).

28 weeks
Change from Baseline in quality of life by the EQ-...
Ramy czasowe: 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 an extreme problem or I am unable to…) and b) additional self-assessment of health by a visual analog scale (0 = worst health patient can imagine, 100 = best health patient can imagine).

28 weeks

Miary wyników drugorzędnych

Miara wyniku
Opis środka
Ramy czasowe
Direct hospital costs
Ramy czasowe: 28 weeks

The direct expenses incurred by the hospital in providing services (medication, tests, medical visits…) during the 28 weeks for the study (in euros).

28 weeks
Change from baseline in "numbness and tingling" self-perceived by patients at the end of ozone treatment.
Ramy czasowe: 16

Self-reported evaluation of the percentage of "numbness and/or tingling" regarding the basal level. From 100% (basal level, 0% improvement) to 0% (no numbness and tingling, 100% improvement).

16
Changes from baseline in the Grade of toxicity of parestesias (numbness, tingling) according to the CTCAE v.5.0. scale at the end of ozone treatment.
Ramy czasowe: 16 weeks

Changes from baseline in the Grade of toxicity of paresthesias (numbness, tingling) according to the CTCAE v.5.0. scale (from the National Cancer Institute of EEUU). Range from: Grade = (asymptomatic or mild symptoms) to Grade 3 (severe symptoms, limiting self-care activities in daily life).

16 weeks
Changes from baseline in the Grade of toxicity of sensory neuropathy according to the CTCAE v.5.0. scale at the end of ozone treatment.
Ramy czasowe: 16 weeks.

Changes from baseline in the Grade of toxicity of paresthesias (numbness, tingling) according to the CTCAE v.5.0. scale (from the National Cancer Institute of EEUU). Range from: Grade = (asymptomatic or mild symptoms) to Grade 4 (life-threatening consequences, urgent intervention indicated).

16 weeks.
Changes from baseline in the degree of neuropathy according to the QLQ-CIPN20 scale at the end of ozone treatment.
Ramy czasowe: 16 weeks.

Changes from baseline in the degree of neuropathy according to the QLQ-CIPN20 scale at the end of ozone treatment (from the European Organization for Research & Treatment in Cancer (EORTC)). It is evaluated through 20 items that are grouped into 3 dimensions: sensitive, motor and autonomic. Range: each item is scored from 1 (nothing) to 4 (a lot). The total score for each dimension is transformed into a score from 0 to 1000, being 0 the best state and 100 the worst.

16 weeks.
Change from baseline in "Quality of Life" (using the EQ-5D-5L questionnaire) self-perceived by patients at the end of ozone treatment (week 16 after the commencement of ozone treatment).
Ramy czasowe: 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 an extreme problem or I am unable to…) and b) additional self-assessment of health by a visual analog scale (0 = worst health patient can imagine, 100 = best health patient can imagine).

16 weeks.
Changes from baseline in the "Quality of Life" according to the QLQ-C30 questionnaire at the end of ozone treatment.
Ramy czasowe: 16 weeks.

Changes from baseline in the "Quality of Life" according to the QLQ-C30 questionnaire (from the European Organization for Research & Treatment in Cancer (EORTC)). Self-reported evaluation of 30 items that measure several scales and symptoms. Range (after standardization): from 0 (worst for overall health and function, best for symptoms) to 100 (best for overall health and functions, worst for symptoms).

16 weeks.
Changes from baseline in levels of anxiety and depression according to the Hospital Anxiety and Depression Scale (HADS), at the end of ozone treatment.
Ramy czasowe: 16 weeks

Changes from baseline in levels of anxiety and depression according to the Hospital Anxiety and Depression Scale (HADS). HADS is a self-administered questionnaire that assesses 14 items/symptoms of anxiety (7) and depression (7) experienced by patients. Each item is scored from 0 (better, no alteration) to 3 (worse level of alteration). For each symptom (anxiety or depression), the overall score is from 0 (better, no anxiety or depression) to 21 (worse, very severe anxiety or depression).

16 weeks
Changes from baseline in biochemical parameters of oxidative stress at the end of ozone treatment.
Ramy czasowe: 16 weeks.

Changes in serum levels of superoxide dismutase, glutathione, glutathione peroxidase and free radicals

16 weeks.
Changes from baseline in biochemical parameters of inflammation at the end of ozone treatment.
Ramy czasowe: 16 weeks

Changes in serum levels of pro-inflammatory cytokines.

16 weeks
Changes from baseline in Hyperspectral signatures and infrared images obtained from hands and feet at then of ozone treatment.
Ramy czasowe: 16 weeks

Assessment of the percentage of reflectance for each wavelength of the hyperspectral and infrared images obtained with specific devices.

16 weeks
Changes from baseline in the Grade of toxicity of paresthesias (numbness, tingling) according to the CTCAE v.5.0. scale at the end of follow-up.
Ramy czasowe: 28 weeks.

Changes from baseline in the Grade of toxicity of paresthesias (numbness, tingling) according to the CTCAE v.5.0. scale (from the National Cancer Institute of EEUU). Range from: Grade = (asymptomatic or mild symptoms) to Grade 3 (severe symptoms, limiting self-care activities in daily life).

28 weeks.
Changes from baseline in the Grade of toxicity of sensory neuropathy according to the CTCAE v.5.0. scale at the end of follow-up.
Ramy czasowe: 28 weeks

Changes from baseline in the Grade of toxicity of paresthesias (numbness, tingling) according to the CTCAE v.5.0. scale (from the National Cancer Institute of EEUU). Range from: Grade = (asymptomatic or mild symptoms) to Grade 4 (life-threatening consequences, urgent intervention indicated).

28 weeks
Changes from baseline in the degree of neuropathy according to the QLQ-CIPN20 scale at the end of follow-up.
Ramy czasowe: Time frame: 28 weeks

Changes from baseline in the degree of neuropathy according to the QLQ-CIPN20 scale at the end of ozone treatment (from the European Organization for Research & Treatment in Cancer (EORTC)). It is evaluated through 20 items that are grouped into 3 dimensions: sensitive, motor, and autonomic. Range: each item is scored from 1 (nothing) to 4 (a lot). The total score for each dimension is transformed into a score from 0 to 1000, being 0 the best state and 100 the worst.

Time frame: 28 weeks
Changes from baseline in the "Quality of Life" according to the QLQ-C30 questionnaire at the end of follow-up.
Ramy czasowe: 28 weeks.

Changes from baseline in the "Quality of Life" according to the QLQ-C30 questionnaire (from the European Organization for Research & Treatment in Cancer (EORTC)). Self-reported evaluation of 30 items that measure several scales and symptoms. Range (after standardization): from 0 (worst for overall health and function, best for symptoms) to 100 (best for overall health and functions, worst for symptoms).

28 weeks.
Changes from baseline in levels of anxiety and depression according to the Hospital Anxiety and Depression Scale (HADS) at the end of follow-up.
Ramy czasowe: 28 weeks.

Changes from baseline in levels of anxiety and depression according to the Hospital Anxiety and Depression Scale (HADS). HADS is a self-administered questionnaire that assesses 14 items/symptoms of anxiety (7) and depression (7) experienced by patients. Each item is scored from 0 (better, no alteration) to 3 (worse level of alteration). For each symptom (anxiety or depression), the overall score is from 0 (better, no anxiety or depression) to 21 (worse, very severe anxiety or depression).

28 weeks.
Changes from baseline in biochemical parameters of oxidative stress at the end of follow-up.
Ramy czasowe: 28 weeks.

Changes in serum levels of superoxide dismutase, glutathione, glutathione peroxidase and free radicals.

28 weeks.
Changes from baseline in biochemical parameters of inflammation at the end of follow-up.
Ramy czasowe: 28 weeks.

Changes in serum levels of pro-inflammatory cytokines.

28 weeks.
Changes from baseline in Hyperspectral signatures and infrared images obtained from hands and feet at the end of follow-up.
Ramy czasowe: 28 weeks.

Assessment of the percentage of reflectance for each wavelength of the hyperspectral and infrared images obtained with specific devices.

28 weeks.
Toxicity of rectal ozone treatment at the end of follow-up.
Ramy czasowe: 28 weeks.

Grade of toxicity secondary to the rectal insufflation of the rectal ozone treatment according to the CTCAE v.5.0. scale (from the National Cancer Institute of EEUU).

28 weeks.

Współpracownicy i badacze

Tutaj znajdziesz osoby i organizacje zaangażowane w to badanie.

Sponsor

Współpracownicy

Śledczy

  • Krzesło do nauki: Bernardino Clavo, MD, PhD, Hospital Universitario de Gran Canaria Dr. Negrín, (FIISC), Las Palmas, Spain
  • Dyrektor Studium: Francisco Rodríguez-Esparragón, BSc, PhD, Hospital Universitario de Gran Canaria Dr. Negrín, (FIISC), Las Palmas, Spain
  • Główny śledczy: Himar Fabelo, BSc, PhD, Hospital Universitario de Gran Canaria Dr. Negrín, (FIISC), Las Palmas, Spain
  • Główny śledczy: Francisco Rodríguez-Esparragón, BSc, PhD, Hospital Universitario de Gran Canaria Dr. Negrín, (FIISC), Las Palmas, Spain
  • Główny śledczy: Bernardino Clavo, MD, PhD, Hospital Universitario de Gran Canaria Dr. Negrín, (FIISC), Las Palmas, Spain
  • Główny śledczy: Gustavo M Callicó, Prof, PhD, University of Las Palmas de Gran Canaria

Publikacje i pomocne linki

Osoba odpowiedzialna za wprowadzenie informacji o badaniu dobrowolnie udostępnia te publikacje. Mogą one dotyczyć wszystkiego, co jest związane z badaniem.

Publikacje ogólne

Daty zapisu na studia

Daty te śledzą postęp w przesyłaniu rekordów badań i podsumowań wyników do ClinicalTrials.gov. Zapisy badań i zgłoszone wyniki są przeglądane przez National Library of Medicine (NLM), aby upewnić się, że spełniają określone standardy kontroli jakości, zanim zostaną opublikowane na publicznej stronie internetowej.

Główne daty studiów

Rozpoczęcie studiów (Rzeczywisty)

7 lutego 2025

Zakończenie podstawowe (Szacowany)

31 grudnia 2029

Ukończenie studiów (Szacowany)

31 marca 2030

Daty rejestracji na studia

Pierwszy przesłany

22 listopada 2024

Pierwszy przesłany, który spełnia kryteria kontroli jakości

22 listopada 2024

Pierwszy wysłany (Rzeczywisty)

26 listopada 2024

Aktualizacje rekordów badań

Ostatnia wysłana aktualizacja (Rzeczywisty)

18 września 2026

Ostatnia przesłana aktualizacja, która spełniała kryteria kontroli jakości

15 września 2026

Ostatnia weryfikacja

1 września 2026

Więcej informacji

Terminy związane z tym badaniem

Inne numery identyfikacyjne badania

  • OzoParQT
  • PI23/01324 (Inny numer grantu/finansowania: Instituto de Salud Carlos III)
  • 2024-517196-20-00 (Ctis)
  • 2023-210-1 (Identyfikator rejestru: CEIm Las Palmas)
  • CIGC'23/24 (Inny numer grantu/finansowania: Cabildo de Gran Canaria)

Plan dla danych uczestnika indywidualnego (IPD)

Planujesz udostępniać dane poszczególnych uczestników (IPD)?

TAK

Opis planu IPD

It will be available (after request):

  • Individual participant data (IPD) that underlie the results reported in further articles, after deidentification
  • Data will be available after publication, ending 36 months following article publication.
  • They will be available for investigators whose proposed use of the data has been approved by an independent review committee identified for this purpose.
  • Study protocol

Proposals should be directed to: bernardinoclavo@gmail.com To gain access, data requestors will need to sign a data access agreement.

Ramy czasowe udostępniania IPD

Data will be available after publication, ending 36 months following article publication.

Kryteria dostępu do udostępniania IPD

Data will be available for investigators whose proposed use of the data has been approved by an independent review committee identified for this purpose.

- Study protocol

Proposals should be directed to: bernardinoclavo@gmail.com To gain access, data requestors will need to sign a data access agreement.

Typ informacji pomocniczych dotyczących udostępniania IPD

  • PROTOKÓŁ BADANIA
  • SOK ROŚLINNY
  • ICF
  • CSR

Informacje o lekach i urządzeniach, dokumenty badawcze

Bada produkt leczniczy regulowany przez amerykańską FDA

Nie

Bada produkt urządzenia regulowany przez amerykańską FDA

Nie

Te informacje zostały pobrane bezpośrednio ze strony internetowej clinicaltrials.gov bez żadnych zmian. Jeśli chcesz zmienić, usunąć lub zaktualizować dane swojego badania, skontaktuj się z register@clinicaltrials.gov. Gdy tylko zmiana zostanie wprowadzona na stronie clinicaltrials.gov, zostanie ona automatycznie zaktualizowana również na naszej stronie internetowej .