Triggered flow measurement
US6672172B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2001 |
| Grant date | Jan 6, 2004 |
| Priority date | — |
| Expiry date | Jul 15, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/028
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
When a bolus dose of cold saline is injected into a catheter where a wire, carrying a sensor unit and electrical leads for signal transmission, is located, the lead resistance is affected by the cold saline thereby altering the resistivity. However, by countering this effect and measuring the change needed to affect this countermeasure, a resistance variation curve can be generated. An accurate starting point for the determination of a transit time can be derived from the curve. Using conventional flow measurement calculations with the accurate starting point yields a better understanding of the flow profile in an artery based on the transit time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.