Method and apparatus for magnetically controlling motion direction of a mechanically pushed catheter
US6475223B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1999 |
| Grant date | Nov 5, 2002 |
| Priority date | — |
| Expiry date | Jul 20, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/374
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The movement of a catheter through a medium, which may be living tissue such as a human brain, is controlled by mechanically pushing a flexible catheter having a magnetic tip through the medium and applying a magnetic field having a magnitude and a direction that guides the mechanically-pushed catheter tip stepwise along a desired path. The magnetic field is controlled in a Magnetic Stereotaxis System by a processor using an adaptation of a PID (proportional, integral, and derivative) feedback method. The magnetic fields are applied by superconducting coils, and the currents applied through the coils are selected to minimize a current metric.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.