A magnetic field generating device for cardiac magnetic navigation surgery system

Abstract

A magnetic field generating device for a cardiac magnetic navigation surgery system, in which eight superconducting magnets (7) are symmetrically arranged on a four-axis oblique coordinate axis formed by four oblique diagonal lines of a regular hexahedron. The center of the navigation area (4) is located at the origin of the four-axis oblique coordinate system, and there is a uniform magnetic field generated by the superconducting magnet (7) in the navigation area (4). A permanent magnetic ring (24) is installed in the front end of the catheter (23), and the torque of the permanent magnetic ring (24) is applied by a uniform magnetic field in the navigation area (4) and is parallel to the direction of the magnetic field; the direction command is input through the input control unit (19) To the controller (20), the controller (20) converts the instruction into a control signal to the superconducting magnet power supply (21), and adjusts the current in the navigation area (4) by changing the magnitude of the current in the eight superconducting magnets (7). The direction of the magnetic field, thereby controlling the direction of the end of the catheter (23), and realizing the navigation of the catheter (23).

Description

technical field [0001] The invention relates to a medical device, in particular to a magnetic field generating device for an interventional cardiac magnetic navigation system. Background technique [0002] Cardiac interventional surgery has been widely used clinically. At present, most hospitals that can implement cardiac interventional surgery use manual intubation technology. Its working principle is realized by the doctor standing beside the patient and manually operating the catheter under the guidance of X-ray machine imaging. During the intubation process, the head end of the catheter is turned or bent to enter the target by pulling back the guide wire. Most cardiovascular diseases can be diagnosed and treated by manual cannulation interventional cardiac surgery, but for some complicated cases, manual cannulation cardiac interventional surgery system needs to be improved in terms of guiding ability and positioning accuracy. Since the interventional doctor is located ...

AI Technical Summary

Problems solved by technology

Although the permanent magnet magnetic navigation cardiac interventional surgery system realizes the desire of interventional doctors to complete cardiovascular interventional procedures away from the operating table, the magnetic field of the permanent magnetic magnetic navigation cardiac interventional surgery system is generated by permanent magnets. , the change of the magnetic field direction is realized by rotating the hemispherical permanent magnet. Due to the limitation of the rotating space, the permanent magnet magnetic navigation cardiac interventional surgery system can only diagnose and treat most cardiovascular diseases, and some patients who are difficult to access or locate Cases are still difficult to treat

In addition, due to the limitation of mechanical inertia and magnetic field strength, the response speed of its navigation will not be too fast, and the navigation accuracy will also be limited

The use of conventional electromagnets to achieve cardiac magnetic navigation interventional surgery can improve the speed and operational accuracy of the surgical operating system, but its volume and power consumption are huge, which limits the wide-scale application of magnetic navigation cardiac interventional surgery systems based on conventional electromagnets

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