Retrograde tissue splitter and method
US5797906A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1995 |
| Grant date | Aug 25, 1998 |
| Priority date | — |
| Expiry date | Apr 28, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M13/003
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A device for retrograde hole opening through tissue has a member elongate on an axis with a cross section shaped to insert axially through external tissue. A distal and a proximal end on the member respectively enter the tissue during placement and remain outside the tissue for control. A tip at the distal end has a deployable tissue divider with one or more tissue parting elements and each has a splitter. The tissue parting elements are located within the cross sectional dimensions of the member in a storage position and are movable relative to the tip for placement in an exposed position relative to the tip when shifted from storage so that the splitter thereof splits tissue during retrograde extraction along the axis and contact with tissue. Linkage between the proximal end and the deployable tissue divider retains each of the tissue parting elements with its splitter exposed. The deployable tissue divider has an electrode for transmitting radio frequency energy received from the proximal end to at least each splitter. A return path completes the circuit to provide an electrosurgical effect during the retrograde extraction. A method of placing the device for retrograde hole open…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.