Apparatus for creating therapeutic charge transfer in tissue
US7288062B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Mar 12, 2004 |
| Grant date | Oct 30, 2007 |
| Priority date | — |
| Expiry date | Jul 2, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N2/12
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus for creating therapeutic charge transfer in tissue includes a coil. The coil generates a changing magnetic field to induct an electric field in the tissue exceeding 10 mV/cm when the coil is 5 cm from the tissue. Preferably, the magnetic field has a growth phase and a decay phase and a duration of the growth phase is at least ten times a duration of the decay phase. The apparatus can include a control circuit to control a current fed to the coil. The control circuit includes two subcircuits and a switch for switching between a first of the subcircuits and a second of the subcircuits; preferably, a λ of the second subcircuit is at least ten times a λ of the first subcircuit. To generate the therapeutic effect, the coil should have a duty cycle of at least ten percent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.