Medical retrieval basket
US6190394A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1999 |
| Grant date | Feb 20, 2001 |
| Priority date | — |
| Expiry date | Nov 5, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/2212
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A medical retrieval basket for removing objects such as urinary and biliary calculi from the body. The basket comprises an elongated flexible tube and a cage which is extendible from the distal end of the tube and can be collapsed by withdrawing into the tube by means of an actuation cable which passes through the tube. The cage consists of a plurality of flexible elements which are outwardly disposed to form a space for entrapping objects. The flexible elements are constructed of a shape memory material, allowing the cage to resume its original configuration when extended from the tube. The configuration of the cage is such that by means of rotating the cage, differing sizes, cross sectional shapes and/or spacing of the flexible elements may be presented to a given portion of the object to be removed. Rotation of the cage is controlled more precisely using an actuation cable constructed of nickel titanium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.