Radially expandable cannula systems and methods for use
US11576700B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2020 |
| Grant date | Feb 14, 2023 |
| Priority date | — |
| Expiry date | Dec 6, 2040 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/3486
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A radially expandable trocar, port or cannula system is provided for use in minimally invasive surgeries. The cannula creates a port access with an initial small internal diameter. The passage of the cannula devices is defined by a plurality of elongate rigid members. A number of mechanisms are provided for expanding the passage of the cannula devices, by moving the plurality of elongate rigid members towards a larger radial location, thereby creating a larger internal diameter for the port. The elongate rigid members can be prevented from unintended movement when the system is at the un-expanded state, during expansion and when it is expanded to the desired larger diameter. Exemplary embodiments include methods of preventing gas loss from the tissue that would occur through the gaps created during expansion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.