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Electric shocks and calcium: a new hope for bladder cancer?

NCT ID NCT07555769

Disease control Sponsor: Juan Luis Vásquez Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This early-stage trial tests a procedure called calcium electroporation for bladder tumors. Doctors inject calcium into the tumor and then apply short electric pulses to destroy cancer cells. The study will include 20 patients who cannot have standard surgery or other treatments. The main goal is to see if the procedure is safe, with a secondary look at whether it shrinks tumors.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
calcium gluconate
What this could lead to
If it works, this could offer a new, less invasive treatment option for bladder tumors when surgery or other therapies are not suitable.
What could go wrong
This is a very early, small Phase 1 trial focused on safety, not effectiveness. It may not work, and side effects are unknown. Results may not apply to all bladder tumor patients.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 1

The first testing in people. Mainly checks safety and dose, usually in a small group.

Participants

About 20 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Jun 2026

An estimate. Start dates often move.

Expected to finish

Apr 2030

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Age ≥ 18 years and able to understand participant information and give informed consent * Histologically verified urothelial bladder tumor * Unfit for cystectomy and/or radiotherapy * Patients with recurrence after radiotherapy unfit for salvage cystectomy * Disease where other treatments are considered unsuitable or have been declined by the patient * The patient may receive simultaneous systemic treatment * Selected high-burden non-muscle-invasive bladder tumors after MDT assessment * Eastern Cooperative Oncology Group (ECOG) Performance Status (PS) ≤ 2 * Life expectancy of ≥ 3 months * Patients must be deemed able to tolerate general anesthesia * Sexually active participants in the reproductive age must use contraception. Accepted contraception includes the use of intrauterine device (IUD), oral contraceptives, male or female condom, vasectomy or female sterilization * Patients must stop treatment with anticoagulants before surgery in accordance with national guidelines * Plasma ionized Ca2+ must be within the normal upper limit. Correction is allowed * Hematology * Thrombocytes ≥ 50 billion/L * International normalized ratio (INR) ≤ 1.5. Correction is allowed Exclusion Criteria: * Pregnancy (confirmed by a blood sample) or lactation * Allergy to calcium gluconate or any of its excipients * Any clinical condition or previous treatment, that in the investigators' opinion made the patient ineligible * Contraindications to treatment with calcium gluconate as described: * Hypersensitivity to calcium gluconate or any of its excipients * Hypercalcemia (e.g. due to hyperparathyroidism, hypervitaminosis D, decalcifying malignancies, renal insufficiency, immobilization osteoporosis, sarcoidosis, milk-alkali syndrome)

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Conditions

The condition(s) this trial relates to.

bladder transitional cell carcinoma transitional cell carcinoma urinary bladder neoplasm Urinary Bladder Neoplasms urothelial carcinoma

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Bladder tumor Bladder tumors Urothelial carcinoma (UC) Urothelial carcinoma bladder

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  2. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

More trials for these conditions

Other studies related to the condition(s) this trial covers.