Tissue repair with space-seeking spirals of filament
US9138254B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2012 |
| Grant date | Sep 22, 2015 |
| Priority date | — |
| Expiry date | Mar 23, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2310/00982
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A distal portion of a filament is extended beyond the distal end of a needle with a gripper. The needle with the extended filament is inserted into a cannula with snagging points at the distal opening of the cannula in tissue. The snagging points of the cannula hook and retain the distal portion of the filament. During partial withdrawal of the needle, a section of filament is deposited in the lumen of the cannula between the distal ends of the needle and cannula. When the needle is re-advanced, the section of filament is expelled or pushed out of the cannula into tissue. The needle is then rotated; the gripper engages and spirals the expelled filament, burrowing into tissue. The needle can further advanced to push and pack the spiral of filament deep into the tissue. The knot-like filament spiral is individually formed by rotation of the needle and friction between the extended filament and tissue. The process of needle partial withdrawal, re-advancement, rotation and pushing is repeated to pack and fill the tissue with interconnecting spirals of filament to prevent migration from tissue. Spiraling of the filament driven by the rotating needle is space seeking, filling, fitting or…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.