BIOMAT Database Logo BIOMAT Database Logo

Noninvasive pump flow estimation of a centrifugal blood pump. 1997

Y Wakisaka, and Y Okuzono, and Y Taenaka, and K Chikanari, and T Masuzawa, and T Nakatani, and E Tatsumi, and T Nishimura, and Y Takewa, and T Ohno, and H Takano
Department of Artificial Organs, National Cardiovascular Center, Research Institute, Osaka, Japan.

A flow rate estimating method was investigated for a centrifugal blood pump developed in our institute. The estimated flow rate was determined by the power consumption, the rotating speed of the motor, and the hematocrit value. The power consumption and the rotating speed of the motor were measured with a wattmeter. The examinations were performed in a closed mock loop filled with goat blood with hematocrit values of 21.5%, 28%, 34%, and 42%. Measured values of blood viscosity were 2.47, 3.09, 3.71, and 5.07 mPa.s at a share rate of 37.5/s, respectively. A linear correlation between the power consumption and the pump flow rate was observed in all hematocrit values. But variations in hematocrit caused a difference in the flow rate up to 1.1 L/min at the same power consumption and rotating speed. Effects of blood viscosity on the flow estimation were corrected by the hematocrit value. The value of the coefficient of determination, R2, between the estimated flow rate and the measured flow rate was 0.988. These results may indicate that the flow estimating method calculated by the power consumption of the motor, the rotating speed, and the hematocrit value is useful in the clinical situation.

UI MeSH Term Description Entries
D008433 Mathematics The deductive study of shape, quantity, and dependence. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed) Mathematic
D011211 Electric Power Supplies Devices that control the supply of electric current for running electrical equipment. Power Sources,Power Supplies,Electric Power Sources,Power Sources, Electric,Power Supplies, Electric,Electric Power Source,Electric Power Supply,Power Source,Power Source, Electric,Power Supply,Power Supply, Electric,Supply, Electric Power
D001783 Blood Flow Velocity A value equal to the total volume flow divided by the cross-sectional area of the vascular bed. Blood Flow Velocities,Flow Velocities, Blood,Flow Velocity, Blood,Velocities, Blood Flow,Velocity, Blood Flow
D001809 Blood Viscosity The internal resistance of the BLOOD to shear forces. The in vitro measure of whole blood viscosity is of limited clinical utility because it bears little relationship to the actual viscosity within the circulation, but an increase in the viscosity of circulating blood can contribute to morbidity in patients suffering from disorders such as SICKLE CELL ANEMIA and POLYCYTHEMIA. Blood Viscosities,Viscosities, Blood,Viscosity, Blood
D002498 Centrifugation Process of using a rotating machine to generate centrifugal force to separate substances of different densities, remove moisture, or simulate gravitational effects. It employs a large motor-driven apparatus with a long arm, at the end of which human and animal subjects, biological specimens, or equipment can be revolved and rotated at various speeds to study gravitational effects. (From Websters, 10th ed; McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
D006041 Goats Any of numerous agile, hollow-horned RUMINANTS of the genus Capra, in the family Bovidae, closely related to the SHEEP. Capra,Capras,Goat
D006353 Heart-Assist Devices Small pumps, often implantable, designed for temporarily assisting the heart, usually the LEFT VENTRICLE, to pump blood. They consist of a pumping chamber and a power source, which may be partially or totally external to the body and activated by electromagnetic motors. Artificial Ventricle,Heart Assist Device,Heart Ventricle, Artificial,Pumps, Heart-Assist,Vascular-Assist Device,Vascular-Assist Devices,Ventricle-Assist Device,Ventricular Assist Device,Artificial Heart Ventricle,Artificial Heart Ventricles,Artificial Ventricles,Assist Device, Heart,Assist Device, Ventricular,Assist Devices, Heart,Assist Devices, Ventricular,Device, Heart Assist,Device, Heart-Assist,Device, Vascular-Assist,Device, Ventricle-Assist,Device, Ventricular Assist,Devices, Heart Assist,Devices, Heart-Assist,Devices, Vascular-Assist,Devices, Ventricle-Assist,Devices, Ventricular Assist,Heart Assist Devices,Heart Ventricles, Artificial,Heart-Assist Device,Heart-Assist Pump,Heart-Assist Pumps,Pump, Heart-Assist,Pumps, Heart Assist,Vascular Assist Device,Vascular Assist Devices,Ventricle Assist Device,Ventricle, Artificial,Ventricle, Artificial Heart,Ventricle-Assist Devices,Ventricles, Artificial,Ventricles, Artificial Heart,Ventricular Assist Devices
D006400 Hematocrit The volume of packed RED BLOOD CELLS in a blood specimen. The volume is measured by centrifugation in a tube with graduated markings, or with automated blood cell counters. It is an indicator of erythrocyte status in disease. For example, ANEMIA shows a low value; POLYCYTHEMIA, a high value. Erythrocyte Volume, Packed,Packed Red-Cell Volume,Erythrocyte Volumes, Packed,Hematocrits,Packed Erythrocyte Volume,Packed Erythrocyte Volumes,Packed Red Cell Volume,Packed Red-Cell Volumes,Red-Cell Volume, Packed,Red-Cell Volumes, Packed,Volume, Packed Erythrocyte,Volume, Packed Red-Cell,Volumes, Packed Erythrocyte,Volumes, Packed Red-Cell
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D012212 Rheology The study of the deformation and flow of matter, usually liquids or fluids, and of the plastic flow of solids. The concept covers consistency, dilatancy, liquefaction, resistance to flow, shearing, thixotrophy, and VISCOSITY. Flowmetry,Velocimetry,Velocimetries

Related Publications

Y Wakisaka, and Y Okuzono, and Y Taenaka, and K Chikanari, and T Masuzawa, and T Nakatani, and E Tatsumi, and T Nishimura, and Y Takewa, and T Ohno, and H Takano
Flow rate and pressure head estimation in a centrifugal blood pump.
November 2002, Artificial organs,
Y Wakisaka, and Y Okuzono, and Y Taenaka, and K Chikanari, and T Masuzawa, and T Nakatani, and E Tatsumi, and T Nishimura, and Y Takewa, and T Ohno, and H Takano
Noninvasive pulsatile flow estimation for an implantable rotary blood pump.
January 2007, Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference,
Y Wakisaka, and Y Okuzono, and Y Taenaka, and K Chikanari, and T Masuzawa, and T Nakatani, and E Tatsumi, and T Nishimura, and Y Takewa, and T Ohno, and H Takano
Investigation of the flow in a centrifugal blood pump.
January 1986, ASAIO transactions,
Y Wakisaka, and Y Okuzono, and Y Taenaka, and K Chikanari, and T Masuzawa, and T Nakatani, and E Tatsumi, and T Nishimura, and Y Takewa, and T Ohno, and H Takano
Flow visualization evaluation of secondary flow in a centrifugal blood pump.
January 1993, ASAIO journal (American Society for Artificial Internal Organs : 1992),
Y Wakisaka, and Y Okuzono, and Y Taenaka, and K Chikanari, and T Masuzawa, and T Nakatani, and E Tatsumi, and T Nishimura, and Y Takewa, and T Ohno, and H Takano
PIV measurements of flow in a centrifugal blood pump: steady flow.
April 2005, Journal of biomechanical engineering,
Y Wakisaka, and Y Okuzono, and Y Taenaka, and K Chikanari, and T Masuzawa, and T Nakatani, and E Tatsumi, and T Nishimura, and Y Takewa, and T Ohno, and H Takano
An automatic flow controller for a centrifugal blood pump.
July 1997, Artificial organs,
Y Wakisaka, and Y Okuzono, and Y Taenaka, and K Chikanari, and T Masuzawa, and T Nakatani, and E Tatsumi, and T Nishimura, and Y Takewa, and T Ohno, and H Takano
Hemolysis estimation in turbulent flow for the FDA critical path initiative centrifugal blood pump.
October 2021, Biomechanics and modeling in mechanobiology,
Y Wakisaka, and Y Okuzono, and Y Taenaka, and K Chikanari, and T Masuzawa, and T Nakatani, and E Tatsumi, and T Nishimura, and Y Takewa, and T Ohno, and H Takano
The role of diastolic pump flow in centrifugal blood pump hemodynamics.
September 2001, Artificial organs,
Y Wakisaka, and Y Okuzono, and Y Taenaka, and K Chikanari, and T Masuzawa, and T Nakatani, and E Tatsumi, and T Nishimura, and Y Takewa, and T Ohno, and H Takano
A flow visualization study of the NCVC centrifugal blood pump.
September 1994, Artificial organs,
Y Wakisaka, and Y Okuzono, and Y Taenaka, and K Chikanari, and T Masuzawa, and T Nakatani, and E Tatsumi, and T Nishimura, and Y Takewa, and T Ohno, and H Takano
Prediction of leakage flow in a shrouded centrifugal blood pump.
September 2010, Artificial organs,
Copied contents to your clipboard!