Systems and methods for detecting tissue contact and needle penetration depth
US6951549B1 · kind B1 · utility
39Cited by
8References
28Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 30, 2002 |
| Grant date | Oct 4, 2005 |
| Priority date | — |
| Expiry date | Sep 30, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49169
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system for detecting tissue contact and penetration depth. The system comprises a needle sheath having a needle sheath inner diameter and a needle sheath outer diameter. A first conductive region is disposed on the needle sheath inner diameter. A needle having a needle insulation layer on the outer diameter upon which a second conductive region is disposed within the first conductive region. A dielectric layer is disposed between the first conductive tube and the second conductive tube. A capacitance sensor is coupled to the first conductive region and the second conductive region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.