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Nasser Catheter

Nasser Catheter

Prolonged Intravesical Therapy

(CIS and NMIBC)

In current practice, patients must hold intravesical BCG or chemotherapy in the bladder for about one hour before voiding, which limits drug exposure and effectiveness. The Nasser float-catheter automatically drains only excess urine while keeping the therapeutic solution in place, allowing a consistent bladder volume and prolonging exposure for 3–4 hours. This extended dwell time improves drug absorption into the bladder wall without adding patient discomfort or complexity.

Radiation therapy for bladder cancer is often limited by variable bladder filling, which changes anatomy and exposes normal tissues to unnecessary radiation. The float-catheter maintains a consistent bladder volume, displacing the bowel upward and allowing oncologists to precisely target the tumor. This results in a tighter high-dose region (red) around the tumor with rapid dose fall-off (blue), reducing toxicity to healthy bladder and bowel while enabling bladder-sparing treatment strategies.

Clinical & Scientific Validation

Patent: U.S. 10,940,287 – Float-controlled catheter for bladder therapy and radiation optimization.

How it Started

The inspiration for the float-catheter came during Dr. Nasser’s fellowship at Memorial Sloan Kettering Cancer Center. Living with his family in an Upper East Side apartment near 89th Street and First Avenue, a simple household repair — noticing how a float regulates water in a toilet tank — sparked the idea for a catheter that could automatically regulate bladder filling. That moment of insight, paired with daily experience treating bladder and prostate cancer patients, led to the development of the float-controlled catheter.

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