Multi-coil differential driving variable stiffness magnetic guide wire and control method thereof

Abstract

The application discloses a multi-coil differential driving variable stiffness magnetic guide wire, which comprises an interventional guide wire body and an external control system, wherein the interventional guide wire body is composed of a super-elastic nickel-titanium alloy inner core, a polyimide insulating flexible isolation layer, a micro coil array and a common ground line topology flexible wire; the external control system is composed of an external magnetic field generating system, a main control console, an electrical control system and a medical image system DSA; the electrical control system comprises an MCU microcontroller, a high-frequency PWM signal generator, an H-bridge driving circuit and a programmable constant current source; the external magnetic field generating system comprises a six-degree-of-freedom mechanical arm and an end cylindrical neodymium iron boron permanent magnet, the six-degree-of-freedom mechanical arm is freely movable in the three-dimensional space of the operating bed area, so as to adjust the position and posture of the end cylindrical neodymium iron boron permanent magnet; the end cylindrical neodymium iron boron permanent magnet is used for generating a global space magnetic field with adjustable direction and gradient in the target blood vessel area, and provides a magnetic coupling external field for the guide wire coil; and a corresponding control method is also disclosed.

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