Functionalized Spiral-Rolling Millirobot for Upstream Swimming in Blood Vessel.

ABSTRACT: Untethered small robots with multiple functions show considerable potential as next-generation catheter-free systems for biomedical applications. However, owing to dynamic blood flow, even effective upstream swimming in blood vessels remains a challenge for the robot, let alone performing medical tasks. This paper presents an untethered millirobot with a streamlined shape that integrates the engine, delivery, and biopsy modules. Based on the proposed spiral-rolling strategy, this robot can move upstream at a record-breaking speed of ≈14 mm s^-1 against a blood phantom flow of 136 mm s^-1 . Moreover, benefiting from the bioinspired self-sealing orifice and easy-open auto-closed biopsy needle sheath, this robot facilitates several biomedical tasks in blood vessels, such a

SUBMITTER: Yang L 

PROVIDER: S-EPMC9165508 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature