Radially expandable cannula devices, and systems and methods for using them
US11337727B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 23, 2021 |
| Grant date | May 24, 2022 |
| Priority date | — |
| Expiry date | Nov 23, 2041 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/3484
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Cannula devices, systems, and methods are provided for introducing one or more instruments into a patient's body to perform a procedure. In one example, the cannula device includes first and second housings defining a throughbore, and a plurality of elongate members extending distally from the housings, the elongate members cooperatively defining a passage axially aligned with the throughbore between proximal ends and distal tips of the elongate members. The first housing is moveable in an axial direction with respect to the second housing to cause the proximal ends of the elongate members to move outwardly to increase a size of the passage and, optionally, may taper when expanded. Optionally, one or more secondary devices, e.g., an obturator with a sharpened tip, or an obturator and tubular access device may be provided that may be inserted through the throughbore into the passage before expansion of the passage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.