Retractor and method for percutaneous tissue retraction and surgery
US7374534B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Mar 9, 2005 |
| Grant date | May 20, 2008 |
| Priority date | — |
| Expiry date | Aug 9, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/3456
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A retractor for percutaneous surgery in a patient which includes an elongate retractor tube composed of circumferentially arranged elongate independent tube segments with proximal ends of the tube segments respectively hinged to a unitary collar whereby the distal ends of the tube segments may be outwardly expanded in umbrella fashion by outwardly pivoting the segments about their respective hinges for thereby retracting surrounding tissue. The distal end of the retractor tube is provided with a tapered distal end suitably dimensioned for insertion into a stab incision. An internally open expansion collet is coaxially received in the collar for adjustable coaxial advancement downwardly into the collar toward the retractor tube segments and fulcrum tabs protrude inwardly and upwardly towards the expansion collet from each tube segment adjacent a respective hinge. The fulcrum tabs are sized for engaging a bottom end of the collet for thereby progressively pivoting the segments outward about their hinges as the collet advances downwardly into the collar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.