Vascular introducer sheath and hemostasis valve for use therewith
US6322541A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1999 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | Sep 10, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/788
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A vascular introducer sheath including a tubular shaft and a hemostasis valve assembly connected to the proximal end thereof. The hemostasis valve assembly includes a hub, a cap and a normally-flat gasket disposed therebetween. Both the hub and the cap include continuous curved contact surfaces facing the top and bottom surfaces of the gasket. The continuous contact surfaces may be flat or gently curved and may be smooth or include a means to grip the gasket. At least one of the contact surfaces is formed at an angle to cause the gasket to become convex or concave in response to compression between the hub and the cap. The continuous contact surfaces uniformly distribute forces onto the perimeter of the gasket to avoid stress concentration points that may compromise gasket integrity. In addition, the continuous contact surfaces reduce the amount of pressure necessary to impart the curved shape of the gasket.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.