Retrograde plunger delivery system
US7591822B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2004 |
| Grant date | Sep 22, 2009 |
| Priority date | — |
| Expiry date | Aug 4, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2210/02
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Cannulas are provided for delivering therapeutic material to a treatment site. The cannula includes a cannula body with a plurality of openings at the distal end, including a longitudinal opening and a plurality of transverse openings that are axially spaced from each other. The cannula also includes a plunger that is configured to be slidably disposed within the cannula lumen. When the plunger is proximally displaced in the cannula lumen, the plunger seals the distal end and deflects the therapeutic material out the transverse openings. As the plunger is proximally displaced within the lumen, the therapeutic material is forced to perfuse out transverse openings located proximal of the plunger position. In one embodiment, the plunger includes an additional pliable sealable member. In another embodiment, the distal end of the cannula body may be implanted by separating the distal end from the cannula body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.