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Otsonihoito parestesiassa (tunnottomuus, pistely) toissijainen kemoterapian aiheuttaman perifeerisen neuropatian jälkeen: RCT. (OzoParQT)

tiistai 15. syyskuuta 2026 päivittänyt: Bernardino Clavo, MD, PhD

Otsonihoidon tehokkuus ja kustannustehokkuus potilailla, joilla on kemoterapian aiheuttaman perifeerisen neuropatian toissijainen parestesia (tunnottomuus, pistely). Satunnaistettu, kolmoissokkoutettu kliininen tutkimus (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.

Tutkimuksen yleiskatsaus

Tila

Rekrytointi

Ehdot

Interventio / Hoito

Yksityiskohtainen kuvaus

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).

Opintotyyppi

Interventio

Ilmoittautuminen (Arvioitu)

42

Vaihe

  • Vaihe 2
  • Vaihe 3

Yhteystiedot ja paikat

Tässä osiossa on tutkimuksen suorittajien yhteystiedot ja tiedot siitä, missä tämä tutkimus suoritetaan.

Opiskeluyhteys

Tutki yhteystietojen varmuuskopiointi

  • Nimi: Francisco Rodríguez-Esparragón, BSc, PhD
  • Puhelinnumero: 34928449288
  • Sähköposti: afrodesp@gmail.com

Opiskelupaikat

    • Las Palmas
      • Las Palmas, Las Palmas, Espanja, 35019
        • Rekrytointi
        • Dr. Negrín University Hospital
        • Ottaa yhteyttä:
        • Ottaa yhteyttä:
          • Francisco Rodríguez-Esparragón, BSc, PhD
          • Puhelinnumero: 34928449288
          • Sähköposti: afrodesp@gmail.com
        • Päätutkija:
          • Bernardino Clavo, MD, PhD
        • Päätutkija:
          • Francisco Rodríguez-Esparragón, BSc, PhD

Osallistumiskriteerit

Tutkijat etsivät ihmisiä, jotka sopivat tiettyyn kuvaukseen, jota kutsutaan kelpoisuuskriteereiksi. Joitakin esimerkkejä näistä kriteereistä ovat henkilön yleinen terveydentila tai aiemmat hoidot.

Kelpoisuusvaatimukset

Opintokelpoiset iät

18 vuotta ja vanhemmat (Aikuinen, Vanhempi Aikuinen)

Hyväksyy terveitä vapaaehtoisia

Ei

Sukupuolet, jotka voivat opiskella

Kaikki

Kuvaus

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

Opintosuunnitelma

Tässä osiossa on tietoja tutkimussuunnitelmasta, mukaan lukien kuinka tutkimus on suunniteltu ja mitä tutkimuksella mitataan.

Miten tutkimus on suunniteltu?

Suunnittelun yksityiskohdat

  • Ensisijainen käyttötarkoitus: Hoito
  • Jako: Satunnaistettu
  • Inventiomalli: Rinnakkaistehtävä
  • Naamiointi: Kolminkertaistaa

Aseet ja interventiot

Osallistujaryhmä / Arm
Interventio / Hoito
Kokeellinen: 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.

Muut nimet:
  • O3
  • Otsonikäsittely
  • O3/O2-kaasuseos
Placebo Comparator: 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.

Muut nimet:
  • O2

Mitä tutkimuksessa mitataan?

Ensisijaiset tulostoimenpiteet

Tulosmittaus
Toimenpiteen kuvaus
Aikaikkuna
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)
Aikaikkuna: 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-...
Aikaikkuna: 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

Toissijaiset tulostoimenpiteet

Tulosmittaus
Toimenpiteen kuvaus
Aikaikkuna
Direct hospital costs
Aikaikkuna: 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.
Aikaikkuna: 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.
Aikaikkuna: 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.
Aikaikkuna: 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.
Aikaikkuna: 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).
Aikaikkuna: 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.
Aikaikkuna: 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.
Aikaikkuna: 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.
Aikaikkuna: 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.
Aikaikkuna: 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.
Aikaikkuna: 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.
Aikaikkuna: 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.
Aikaikkuna: 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.
Aikaikkuna: 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.
Aikaikkuna: 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.
Aikaikkuna: 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.
Aikaikkuna: 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.
Aikaikkuna: 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.
Aikaikkuna: 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.
Aikaikkuna: 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.

Yhteistyökumppanit ja tutkijat

Täältä löydät tähän tutkimukseen osallistuvat ihmiset ja organisaatiot.

Sponsori

Yhteistyökumppanit

Tutkijat

  • Opintojen puheenjohtaja: Bernardino Clavo, MD, PhD, Hospital Universitario de Gran Canaria Dr. Negrín, (FIISC), Las Palmas, Spain
  • Opintojohtaja: Francisco Rodríguez-Esparragón, BSc, PhD, Hospital Universitario de Gran Canaria Dr. Negrín, (FIISC), Las Palmas, Spain
  • Päätutkija: Himar Fabelo, BSc, PhD, Hospital Universitario de Gran Canaria Dr. Negrín, (FIISC), Las Palmas, Spain
  • Päätutkija: Francisco Rodríguez-Esparragón, BSc, PhD, Hospital Universitario de Gran Canaria Dr. Negrín, (FIISC), Las Palmas, Spain
  • Päätutkija: Bernardino Clavo, MD, PhD, Hospital Universitario de Gran Canaria Dr. Negrín, (FIISC), Las Palmas, Spain
  • Päätutkija: Gustavo M Callicó, Prof, PhD, University of Las Palmas de Gran Canaria

Julkaisuja ja hyödyllisiä linkkejä

Tutkimusta koskevien tietojen syöttämisestä vastaava henkilö toimittaa nämä julkaisut vapaaehtoisesti. Nämä voivat koskea mitä tahansa tutkimukseen liittyvää.

Yleiset julkaisut

Opintojen ennätyspäivät

Nämä päivämäärät seuraavat ClinicalTrials.gov-sivustolle lähetettyjen tutkimustietueiden ja yhteenvetojen edistymistä. National Library of Medicine (NLM) tarkistaa tutkimustiedot ja raportoidut tulokset varmistaakseen, että ne täyttävät tietyt laadunvalvontastandardit, ennen kuin ne julkaistaan ​​julkisella verkkosivustolla.

Opi tärkeimmät päivämäärät

Opiskelun aloitus (Todellinen)

Perjantai 7. helmikuuta 2025

Ensisijainen valmistuminen (Arvioitu)

Maanantai 31. joulukuuta 2029

Opintojen valmistuminen (Arvioitu)

Sunnuntai 31. maaliskuuta 2030

Opintoihin ilmoittautumispäivät

Ensimmäinen lähetetty

Perjantai 22. marraskuuta 2024

Ensimmäinen toimitettu, joka täytti QC-kriteerit

Perjantai 22. marraskuuta 2024

Ensimmäinen Lähetetty (Todellinen)

Tiistai 26. marraskuuta 2024

Tutkimustietojen päivitykset

Viimeisin päivitys julkaistu (Todellinen)

Perjantai 18. syyskuuta 2026

Viimeisin lähetetty päivitys, joka täytti QC-kriteerit

Tiistai 15. syyskuuta 2026

Viimeksi vahvistettu

Tiistai 1. syyskuuta 2026

Lisää tietoa

Tähän tutkimukseen liittyvät termit

Muut tutkimustunnusnumerot

  • OzoParQT
  • PI23/01324 (Muu apuraha/rahoitusnumero: Instituto de Salud Carlos III)
  • 2024-517196-20-00 (Ctis)
  • 2023-210-1 (Rekisterin tunniste: CEIm Las Palmas)
  • CIGC'23/24 (Muu apuraha/rahoitusnumero: Cabildo de Gran Canaria)

Yksittäisten osallistujien tietojen suunnitelma (IPD)

Aiotko jakaa yksittäisten osallistujien tietoja (IPD)?

JOO

IPD-suunnitelman kuvaus

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.

IPD-jaon aikakehys

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

IPD-jaon käyttöoikeuskriteerit

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.

IPD-jakamista tukeva tietotyyppi

  • STUDY_PROTOCOL
  • MAHLA
  • ICF
  • CSR

Lääke- ja laitetiedot, tutkimusasiakirjat

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Ei

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