Systems and methods for detecting tissue contact and needle penetration depth
US7364567B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 10, 2002 |
| Grant date | Apr 29, 2008 |
| Priority date | — |
| Expiry date | May 2, 2023 |
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.In an alternative aspect, the system includes a needle and a sensor. The sensor, in another exemplary embodiment, is coupled with a portion of the needle to detect tissue contact pressure on the sensor as the needle penetrates tissue and makes contact with the sensor. The sensor is located a predetermined distance from the first end of the needle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.