Results 241 to 250 of about 3,839,345 (306)

Control of heart assist devices

42nd IEEE International Conference on Decision and Control (IEEE Cat. No.03CH37475), 2004
In this paper, we discuss several control techniques for Ventricular Assist Devices (VADs) and describe a hierarchical control structure that can be used to regulate the operation of a turbo-hydrodynamic VAD. Early assist devices were pulsatile, and control usually focused on regulating flow, atrial and/or arterial pressures.
James F. Antaki, J. Robert Boston, Marwan A. Simaan   +2 more
openaire   +1 more source

Control of rotary heart assist devices

Proceedings of the 2000 American Control Conference. ACC (IEEE Cat. No.00CH36334), 2000
Rotary assist devices are state of the art blood pumps that are used in therapies to treat weak hearts, usually associated with myocardial diseases. We develop three indices to detect the occurrence of suction in these pumps: pulsatility index, diminishing returns index and harmonic index.
Leonardo A. Baloa, Dehou Liu, J. Robert Boston, Marwan A. Simaan, James F. Antaki   +4 more
openaire   +2 more sources

The Design of a Piezoelectric Heart Assist Device

IEEE Transactions on Biomedical Engineering, 1975
A piezoelectric heart assist device was designed, and preliminary tests were performed in vitro and in vivo. The device has the advantages of simple construction, low power consumption (approximately one watt), electrical rather than pneumatic drive, and noiseless operation.
M J, Williams, W, Welkowitz, S, Fich, D A, Molony, D, Jaron, A, Kantrowitz   +5 more
openaire   +2 more sources

Heart transplantation, assist devices, and cardiomyoplasty

Current Opinion in Cardiology, 1992
Allograft replacement of the heart in pediatric patients has gained growing interest within the spectrum of cardiac transplantation. Here and in other age groups, new immunosuppressive agents are under investigation, hopefully providing more selective reduction of the immune response with lower side effects compared with conventional therapy.
A, Haverich, G, Watanabe
openaire   +2 more sources

Control of an extracorporeal heart assist device

2012 IEEE International Conference on Control Applications, 2012
Heart assist devices provide mechanical circulatory support for patients with end-stage heart failure. Extracorporeal blood pumps are applied to adult and pediatric patients in the case of uni- and biventricular assistance. Modern driving units provide more mobility what is an immense benefit to the quality of life of the patients.
Alexander Sievert, Constantin Wiesener, Andreas Arndt, Wolfgang Drewelow, Olaf Simanski   +4 more
openaire   +2 more sources

Experience with the Berlin Heart Assist Device

Artificial Organs, 1994
Abstract: Different mechanical circulatory support systems (MCSS) have been in clinical use since 1987 to keep patients alive by assisting the heart during cardiac recovery after open heart surgery, myocardial infarction, acute graft failure after heart transplantation, or as a bridge to transplantation in heart transplant candidates.
A, Goullon, D, Ries
openaire   +2 more sources

Ventricular assist device: saving the failing heart

Progress in Transplantation, 2010
Background Improving the survival and quality of life of patients with end-stage heart failure is the primary goal of using a ventricular assist device, generally known as mechanical circulatory support. Ventricular assist devices are a practical long-term surgical option for a select group of patients with end ...
Sudha, Kurien, Colleen, Gallagher
openaire   +2 more sources

Heart Assist Devices: State of the Art

Critical Care Nursing Clinics of North America, 1991
The various types of available mechanical assist devices are discussed in this article. Nursing care (both intraoperatively and postoperatively) and complications are also reviewed.
openaire   +2 more sources