Exposure apparatus for paraspinal muscle clearance approach with posteriorspinal small incision
US9439638B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2013 |
| Grant date | Sep 13, 2016 |
| Priority date | — |
| Expiry date | Nov 12, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/0807
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An exposure apparatus for a paraspinal muscle clearance approach with a posterior spinal small incision includes a spinous process side vertebral plate retractor and a cooperating vertebral arch outer side retractor is provided. The apparatus can be used to separate a clearance between a multifidus muscle and a longissimus muscle under direct view, easily and atraumatically reach a screw fixation position on a vertebral arch pedicle, expose a facet joint, bluntly separate the multifidus muscle from the vertebral arch, accurately place the retractors, and thereafter locally form a surgical operation tunnel space that externally extends 10 degrees to 15 degrees. A design of angles and structures of retractors effectively protects local soft tissues and prevents a tissue damage while executing traction on local muscles and ensuring an adequate surgical space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.