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Table 1 Parameters of needle segments

From: A concentric tube-based 4-DOF puncturing needle with a novel miniaturized actuation system for vitrectomy

Member OD (mm) ID (mm) K (mm−1) s (mm) L (mm)
Cannula 0.8128 0.7112 0.0320 22.1370 200
Stylet 0.46 − 0.0220 49.5387 300