Reuben Brewer,J. Kenneth Salisbury, Jr.,Kevin E. Loewke,David B Camarillo
申请号：
US12603387
公开号：
US08316861B2
申请日:
2009.10.21
申请国别(地区):
US
年份:
2012
代理人:
摘要：
A magnetic force control system for guiding a medical instrument within a body includes: a controlled magnet coupled to the medical instrument a controller magnet that exerts a magnetic force on the controlled magnet a magnetically permeable shield, placed between the controlled magnet and the controller magnet, that selectively modulates the magnetic force by rerouting magnetic field lines and a control system. A method for guiding a medical instrument within a body with magnetic force control includes: providing a controlled magnet coupled to the medical instrument, inserting the controlled magnet and medical instrument into the body, providing a controller magnet outside the body, placing a magnetically permeable shield between the controlled magnet and the controller magnet, applying magnetic force, and selectively modulating the magnetic force with the shield to vary at least one of amplitude and orientation of the magnetic force, thereby guiding the controlled magnet within the body.
