Configured and sized cannula
US8852244B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 13, 2013 |
| Grant date | Oct 7, 2014 |
| Priority date | — |
| Expiry date | Sep 13, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/564
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A dilator retractor and the dilators that are used for minimally invasive spinal surgery or other surgery are configured to accommodate the anatomical structure of the patient as by configuring the cross sectional area in an elliptical shape, or by forming a funnel configuration with the wider end at the proximate end. In some embodiments the distal end is contoured to also accommodate the anatomical structure of the patient so that a cylindrically shaped, funnel shaped, ovoid shaped dilator retractor can be sloped or tunneled to accommodate the bone structure of the patient or provide access for implants. The dilator retractor is made with different lengths to accommodate the depth of the cavity formed by the dilators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.