Vitrectomy instrument with multiple rotating cutting edges
US11213425B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 3, 2019 |
| Grant date | Jan 4, 2022 |
| Priority date | — |
| Expiry date | Mar 18, 2040 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M1/774
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Provided herein are vitrectomy instruments and related systems and methods in which example vitrectomy instruments have multiple rotating cutting edges for severing vitreous fibers. An example vitrectomy instrument may include a handle; an outer tube; and an inner tube configured to be rotated within the outer tube in multiple oscillating rotational cycles. The outer tube may include a port disposed at a distal end thereof. The inner tube may include at least first and second forward cutting edges, so that rotation in a first rotational direction results in both the first and second forward cutting edges cutting vitreous fibers drawn into the port. The inner tube may also include one or more backward cutting edges, so that rotation in a second rotational direction results in one or more backward cutting edges cutting vitreous fibers drawn into the port. Additional forward and/or backward cutting edges may be provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.