💬In plain words
What the trial is, and whether it could suit you
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
Sign in to get the eligibility rules as simple questions to take to your doctor.
📋 Eligibility rules (as published)
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
💊
What it tests
- Ozone therapy
- Oxygen (placebo)
Dr. Negrín University Hospital
Las Palmas, Spain
🤝 Taking part is your choice, and you can leave at any time. Only the trial team can confirm you are eligible — always decide together with your own doctor.
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