Naslov
Hydrodynamic system for blood flow measurement

Autori
Breyer, Branko ; Ferek-Petrić, Božidar

Broj patenta
US 5, 271, 408

Godina
1993

Datum patenta
21.12.1993.

Nositelj prava
Siemens Elema AB, Zagreb, Hrvatska

Sažetak
A device for measuring blood flow in the vicinity of a catheter implanted within the vascular vessel or the heart uses hydrodynamic principles. The device has two transducers mounted at the exterior surface of the catheter spaced from each other. One of the transducers has a protrusion in the form of a hydrofoil profile, and the other transducer presents a substantially flat surface at the exterior of the catheter. The transducer having the hydrofoil profile generates a signal due to the quasi-static pressure acting on the transducer as well as due to the drag force acting on the transducer caused by the blood flow. The other transducer generates a signal solely due to the quasi-static pressure. The transducers can either be connected with opposite polarity, or their respective signals can be subtracted in a differential amplifier, so that a signal proportional to the axial flow velocity is obtained.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA