Systems and methods for detecting tissue contact and needle penetration depth
US8177748B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 15, 2004 |
| Grant date | May 15, 2012 |
| Priority date | — |
| Expiry date | Jun 15, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2025/0096
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Systems and methods for determining tissue contact and penetration depth are provided. In one aspect, the system includes a needle and a pressure measurement assembly. The needle, in one exemplary embodiment, includes a first end and a second end with at least one aperture located a predetermined distance from the first end. The pressure measurement assembly is connected with a portion of the needle to measure pressure of fluid flowing through the needle. The pressure measurement assembly measures a first pressure when the needle contacts tissue and a second difference in pressure when the needle penetrates the tissue and the aperture becomes occluded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.