The Hong Kong University of Science and Technology (HKUST) has unveiled what may be the world’s smallest multifunctional surgical robot, measuring just 0.95 millimeters—60% smaller than current endoscopic robots.
Built with a hollow skeleton, optical fiber array, functionalized skin, and a gel-like outer layer, it integrates imaging, high-precision motion, and multi-operation capabilities.
A study published in Nature Communications showed the robot expands imaging by 25 times; extends obstacle detection to 9.4 mm (10 times beyond the theoretical limit); and performs sampling, drug delivery, and laser ablation. It can also smoothly navigate in vitro bronchial models and ex-vivo porcine lungs.
Prof. Shen Yajing, head of the research team, said existing small-scale robots struggle with compactness, precise navigation, and functionality. The new design aims to overcome these challenges, enhancing interventional diagnostics and treatment. He noted that this innovation could aid surgical robots with early diagnosis and treatment in hard-to-reach bodily areas, broadening biomedical applications. The team is planning further in vitro trials to validate the robot’s clinical potential.
