Pulse-injector for quantitative angiographic blood-flow...

Details Pulse-injector for quantitative angiographic blood-flow... Pulse-injector for quantitative angiographic blood-flow...

A - Human Necessities

61

M

A61M 5/175 (2006.01) A61M 5/00 (2006.01) A61M 25/00 (2006.01)

Patent

CA 2110240

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 boll 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.

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