BIOMAT Database Logo BIOMAT Database Logo

Control system for an implantable rotary blood pump. 2000

K I Nakata, and M Yoshikawa, and T Takano, and Y Sankai, and G Ohtsuka, and J Glueck, and A Fujisawa, and K Makinouchi, and M Yokokawa, and S Nosaka, and Y Nose
Department of Surgery, Baylor College of Medicine, One Baylor Plaza, Houston, Texas 77030, USA.

Rotary blood pumps can be used for long-term left ventricular assist devices. These pumps have several advantages over the conventional pulsatile pumps including smaller size, higher efficiency, and simple design and construction. However, one of the difficulties associated with the rotary blood pump is the proper control method to maintain an optimum flow rate in different physiological conditions. The rotary blood pump can be controlled by two methods. The first is to utilize the measured pump flow rate from its servo signal. The second is to detect and avoid abnormal pumping conditions such as; back flow and sudden increase in the pressure head. This abnormal situation typically occurs from excessive suction of blood when there is a functional or mechanical occlusion in the inflow cannula. The ultrasound flow meter is durable and reliable but it is difficult to continually monitor the blood flow rate of an implantable pump. Therefore, another method is needed instead of the continuous flow monitoring. One chronic calf having an LVAD was subjected for the development of this control system. This calf survived more than 6 months. Voltage, current, motor speed, heart rate and the pump flow rate were recorded and stored at 30-min intervals in a computer. Utilizing these parameters, attempts were made (1) to achieve indirect flow assessments and (2) to reveal abnormal operating parameters of the centrifugal pump (1). Indirect flow measurement, the predicted pump flow rate was calculated from these pump derived parameters (required power, motor speed and heart rate). The value of the coefficient of determination (R) between the measured and estimated pump flow rate was 0.796. (2) Abnormal operating indicator, there was an association between the required current and pump flow waves. The current was differentiated, and then calculated to the power of the differentiated current. The normal range of this value was 0.02+/-0.54. In abnormal conditions, this abnormal operating indicator increased 500 times. The predicted flow estimation method and abnormal operating indicator were available from intrinsic operating parameters of the pump and need no sensors. These two methods were simple, yet they are possibly effective and reliable servo control methods for a rotary blood pump.

UI MeSH Term Description Entries
D008422 Materials Testing The testing of materials and devices, especially those used for PROSTHESES AND IMPLANTS; SUTURES; TISSUE ADHESIVES; etc., for hardness, strength, durability, safety, efficacy, and biocompatibility. Biocompatibility Testing,Biocompatible Materials Testing,Hemocompatibility Testing,Testing, Biocompatible Materials,Testing, Hemocompatible Materials,Hemocompatibility Testings,Hemocompatible Materials Testing,Materials Testing, Biocompatible,Materials Testing, Hemocompatible,Testing, Biocompatibility,Testing, Hemocompatibility,Testing, Materials,Testings, Biocompatibility
D001775 Blood Circulation The movement of the BLOOD as it is pumped through the CARDIOVASCULAR SYSTEM. Blood Flow,Circulation, Blood,Blood Flows,Flow, Blood
D002417 Cattle Domesticated bovine animals of the genus Bos, usually kept on a farm or ranch and used for the production of meat or dairy products or for heavy labor. Beef Cow,Bos grunniens,Bos indicus,Bos indicus Cattle,Bos taurus,Cow,Cow, Domestic,Dairy Cow,Holstein Cow,Indicine Cattle,Taurine Cattle,Taurus Cattle,Yak,Zebu,Beef Cows,Bos indicus Cattles,Cattle, Bos indicus,Cattle, Indicine,Cattle, Taurine,Cattle, Taurus,Cattles, Bos indicus,Cattles, Indicine,Cattles, Taurine,Cattles, Taurus,Cow, Beef,Cow, Dairy,Cow, Holstein,Cows,Dairy Cows,Domestic Cow,Domestic Cows,Indicine Cattles,Taurine Cattles,Taurus Cattles,Yaks,Zebus
D004867 Equipment Design Methods and patterns of fabricating machines and related hardware. Design, Equipment,Device Design,Medical Device Design,Design, Medical Device,Designs, Medical Device,Device Design, Medical,Device Designs, Medical,Medical Device Designs,Design, Device,Designs, Device,Designs, Equipment,Device Designs,Equipment Designs
D005260 Female Females
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
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

K I Nakata, and M Yoshikawa, and T Takano, and Y Sankai, and G Ohtsuka, and J Glueck, and A Fujisawa, and K Makinouchi, and M Yokokawa, and S Nosaka, and Y Nose
Noninvasive deadbeat control of an implantable rotary blood pump: a simulation study.
January 2009, Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference,
K I Nakata, and M Yoshikawa, and T Takano, and Y Sankai, and G Ohtsuka, and J Glueck, and A Fujisawa, and K Makinouchi, and M Yokokawa, and S Nosaka, and Y Nose
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,
K I Nakata, and M Yoshikawa, and T Takano, and Y Sankai, and G Ohtsuka, and J Glueck, and A Fujisawa, and K Makinouchi, and M Yokokawa, and S Nosaka, and Y Nose
Rotary blood pump: paracorporeal, implantable, percutaneous?
July 1997, Artificial organs,
K I Nakata, and M Yoshikawa, and T Takano, and Y Sankai, and G Ohtsuka, and J Glueck, and A Fujisawa, and K Makinouchi, and M Yokokawa, and S Nosaka, and Y Nose
Noninvasive activity-based control of an implantable rotary blood pump: comparative software simulation study.
February 2010, Artificial organs,
K I Nakata, and M Yoshikawa, and T Takano, and Y Sankai, and G Ohtsuka, and J Glueck, and A Fujisawa, and K Makinouchi, and M Yokokawa, and S Nosaka, and Y Nose
A method for control of an implantable rotary blood pump for heart failure patients using noninvasive measurements.
August 2011, Artificial organs,
K I Nakata, and M Yoshikawa, and T Takano, and Y Sankai, and G Ohtsuka, and J Glueck, and A Fujisawa, and K Makinouchi, and M Yokokawa, and S Nosaka, and Y Nose
A rotary implantable pump.
November 1974, Medical & biological engineering,
K I Nakata, and M Yoshikawa, and T Takano, and Y Sankai, and G Ohtsuka, and J Glueck, and A Fujisawa, and K Makinouchi, and M Yokokawa, and S Nosaka, and Y Nose
Non-invasive estimation and control of inlet pressure in an implantable rotary blood pump for heart failure patients.
August 2011, Physiological measurement,
K I Nakata, and M Yoshikawa, and T Takano, and Y Sankai, and G Ohtsuka, and J Glueck, and A Fujisawa, and K Makinouchi, and M Yokokawa, and S Nosaka, and Y Nose
Can we develop a totally implantable rotary blood pump?
July 1995, Artificial organs,
K I Nakata, and M Yoshikawa, and T Takano, and Y Sankai, and G Ohtsuka, and J Glueck, and A Fujisawa, and K Makinouchi, and M Yokokawa, and S Nosaka, and Y Nose
Wireless monitoring and control for implantable rotary blood pumps.
July 1997, Artificial organs,
K I Nakata, and M Yoshikawa, and T Takano, and Y Sankai, and G Ohtsuka, and J Glueck, and A Fujisawa, and K Makinouchi, and M Yokokawa, and S Nosaka, and Y Nose
Automated non-invasive detection of pumping states in an implantable rotary blood pump.
January 2006, Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference,
Copied contents to your clipboard!