ArticleFundamental research2026
Magnetic catheter robot with dynamic force feedback for stiffness identification and abnormality detection.
Article in Fundamental research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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9 authors.
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Abstract
Magnetic continuum robots offer unique advantages for minimally invasive surgery owing to their flexibility, miniaturization, and remote actuation. However, the absence of reliable real-time force feedback in existing magnetically actuated catheters severely constrains safe interaction, and quantitative identification of tissue mechanical properties. To address this limitation, this work presents a magnetic catheter robot with integrated dynamic force feedback. The proposed system integrates an axial optical force sensor, a miniaturized endoscope, and annular permanent magnets within a compact distal architecture. This design achieves sub-0.01 N force resolution while remaining robust under large bending deformations and varying deflection angles. System performance is quantitatively evaluated through force-controlled planar writing, 3D curved-surface palpation with shape perception and stiffness mapping, and endoscope-guided bronchial palpation, demonstrating reliable stiffness-based abnormality detection in complex luminal environments. These results demonstrate the feasibility of force-aware magnetic catheterization for quantitative assessment of local tissue mechanics, providing a clinically relevant platform for minimally invasive diagnostics.
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