Pulse-injector for quantitative angiographic blood-flow measurements
US5485831A · kind A · utility
102Cited by
15References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1993 |
| Grant date | Jan 23, 1996 |
| Priority date | — |
| Expiry date | Nov 30, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/007
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A technique for pulsed-injection of radiographic contrast agent uses a pressurized source of contrast agent interrupted by a rotary valve at rates ranging from 1 to 30 Hz. This produces well-defined boli at the end of the catheter. The position of these boli is recorded by a digital radiographic system and analyzed to produce quantitative measurements of blood velocity and flow rate throughout the cardiac cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.