SMRTR Science & EngineeringAug 14, 2025Interesting Engineering

Tiny magnetic ‘robot’ could help dissolve kidney stones faster with less pain

SMRTR summary

Scientists at the University of Waterloo have developed a 12-millimeter magnetic robot that could revolutionize kidney stone treatment. The filament contains urease, an enzyme that dissolves stones, and can be magnetically steered through the urinary tract. When near a kidney stone, it releases urease, raising pH levels to dissolve stones more effectively. Lab tests showed it dissolved 30% of stone mass over five days, potentially providing faster relief than oral medications and reducing the need for surgery in many cases.

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