Dual valve, flexible expandable sheath and method
US6808520B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2001 |
| Grant date | Oct 26, 2004 |
| Priority date | — |
| Expiry date | Sep 1, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M25/0668
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A sheath for use in introducing a catheter or other medical instrument into a vessel in the body of a patient. The sheath includes an elongate sheath tube formed of a flexible material which has proximal and distal extremities and a passage extending therethrough A backflow adapter is secured to the proximal extremity of the elongate sheath tube. The backflow adapter has a central opening therein in registration with the passage in the sheath tube. A normally closed primary valve is disposed in the central opening of the backflow adapter and is movable le to an open position. A normally open secondary valve, movable to a closed position, may be configured in the backflow adapter proximal the sheath tube and distal the primary valve. The primary and secondary valves when open permit a catheter or other medical instrument to be inserted into the sheath.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.