Sealed neurovascular extendable catheter
US11517335B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 2019 |
| Grant date | Dec 6, 2022 |
| Priority date | — |
| Expiry date | Jan 27, 2040 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/0272
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A catheter is provided which includes an outer catheter and an extendable inner catheter. A sealing feature is positioned between the inner catheter and the outer catheter to seal the annular gap between the two while allowing axial translation. The seal may be a compliant protrusion surrounding the inner catheter and may have a chevron-shape for facilitating axial translation. The seal may be a one-way valve configured to allow antegrade flushing but prevent retrograde flow. The seal may be squeegee-like flange on the distal tip of the outer catheter. The seal may be an expandable bulge, which may be mechanically expandable or inflatable or which may be a photosensitive or electrosensitive hydrogel. The seal may include a spring that is radially compressed upon translation or rotation of the inner catheter to transiently break the seal. Also provided is a seal for sealing between the catheter and the vasculature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.