Medical instrument for containment and removal of calculi
US4611594A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 1984 |
| Grant date | Sep 16, 1986 |
| Priority date | — |
| Expiry date | Apr 11, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/303
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Several versions of instruments are disclosed which are useful for the containment of calculi to minimize injury to surrounding tissue during removal and/or destruction of such calculi. In each embodiment a suitable grasping device is utilized to locate and grasp a stone (calculus) in a body passage or organ, such grasping device being used in combination with a catheter having an expandable and contractable distal end portion capable of receiving and substantially enclosing the stone to protect the surrounding tissue from injury that might otherwise be produced by the rough edges of the stone as it is extracted, or to shield such tissue as the stone is fragmented in situ and then contain the fragments as they are removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.