Kink resistant cannula having buckle resistant apertures
US8684967B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2004 |
| Grant date | Apr 1, 2014 |
| Priority date | — |
| Expiry date | Dec 7, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2025/004
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A cannula has a body with a proximal end and a distal end and a tip on the distal end. The tip has an outer wall defining a lumen opening at the end of the tip and extending to the proximal end of the cannula. The tip further comprises one or more ribs extending into the lumen to support the outer wall from kinking when the cannula is flexed. The outer wall has a inner surface defining the lumen and a plurality of non-circular apertures formed in the tip extending into the lumen. The apertures having a major axis and a minor axis. The major axis aligned in relation to a circumference of the outer wall to prevent puckering or buckling when the tip is bent. This alignment is also designed to support the outer wall from kinking when the tip is bent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.