Balloon Catheter Light Distribution for Bladder Tumor Treatment

The balloon catheter is divided into multiple light-emitting sections (first, second, third light emitters at different positions) that can be activated sequentially or simultaneously. This segmentation allows the treatment to be divided into multiple stages, enabling complete bladder surface coverage while maintaining adequate light intensity by treating different regions in sequence rather than attempting to illuminate the entire surface at once.

The patent employs periodic activation of different light emitters in sequence. The first light emitter treats the anterior wall, then the second and third light emitters treat other regions in subsequent time periods. This periodic action allows urine to be partially drained or redistributed between treatment phases, preventing excessive urine accumulation that would attenuate light intensity while still achieving comprehensive coverage over the treatment cycle.

The total treatment energy is segmented across multiple low-power light emitters positioned at different locations within the balloon catheter. Instead of using one high-power emitter that risks tissue damage, the patent distributes the treatment burden across several emitters (first, second, third light emitters), each delivering lower power that is safer for surrounding tissues while collectively achieving the required total energy dose for effective treatment.

The patent applies partial action by using multiple light emitters that each deliver a portion of the total required treatment energy. The first light emitter provides treatment to the anterior wall, while second and third emitters provide treatment to other regions. This partial action approach ensures that no single emitter delivers excessive energy that could cause tissue damage, while the cumulative effect of all emitters achieves the necessary total energy dose for reliable treatment effectiveness.

The patent transitions from the one-dimensional linear approach of a rigid endoscope to a three-dimensional omnidirectional approach using a balloon catheter with multiple light emitters positioned at different spatial locations (anterior, lateral, posterior walls). This dimensional change allows light to be delivered from multiple directions simultaneously, enabling detection and treatment of tumors in the lower bladder region that would be obscured from the single viewing angle of a rigid endoscope.

The balloon catheter with multiple light emitters serves multiple functions: it can treat tumors on the anterior wall (first light emitter), lateral walls (second light emitter), and posterior wall (third light emitter). This multi-functional design replaces the need for multiple separate procedures or instruments, providing universal coverage of all bladder regions including the lower part that is difficult to access with a rigid endoscope alone.