Electrosurgical probe for tumor treatment by radiofrequency
US6623481B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2002 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | Jan 18, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B18/1477
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An electrosurgical probe including a metal cannula, partially provided with an electroinsulating coating, and filiform electrodes housed in the cannula in a stretched position. The filiform electrodes are provided with an elastic memory of an arched shape and as a result, come out from the cannula to occupy a limited, nearly spherical volume. The electrodes are fixed to the distal end of a control rod slidably arranged inside the cannula so that the electrodes in a stretched position are arranged side by side parallel with the control rod. The cannula includes a series of holes each positioned immediately under the free ends of the filiform electrodes and having a sufficient diameter for the passage of a respective one of the electrodes. The electrodes are removed from the cannula by pulling the control rod and retracted into the cannula by pushing the control rod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.