Tissue removal device for neurosurgical and spinal surgery applications
US8657841B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 2008 |
| Grant date | Feb 25, 2014 |
| Priority date | — |
| Expiry date | Jun 28, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M1/79
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A tissue cutting device that is especially suited for neurosurgical applications is disclosed and described. The device includes a handpiece and an outer cannula in which a reciprocating inner cannula is disposed. The inner cannula includes a hinge between a body section and a cutting section that allows the cutting section to pivot when the inner cannula reciprocates within the outer cannula. A tissue collector is also provided and is in fluid communication with the lumen of the inner cannula. The inner cannula and the outer cannula define an annular space between the inner cannula and the outer cannula, and a seal is provided at the proximal end of the annular space. The seal is preferably a thixotropic, semi-solid material such as a high vacuum, halogenated polymeric grease. The device may also include an inner cannula stop position control for selectively controlling the position of the inner cannula when it is at rest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.