scholarly journals Cytocompatibility of DLC coating for inner wall of artificial heart blood pump

2008 ◽  
Vol 20 (Supplement) ◽  
pp. 115-115
Author(s):  
K. Kanasugi ◽  
Y. Ohgoe ◽  
K. Hirakuri ◽  
A. Funakubo ◽  
Y. Fukui
Keyword(s):  
Artificial Heart ◽  
Blood Pump ◽  
Dlc Coating ◽  
Heart Blood

Diamond-like Carbon Film Deposition on an Artificial Heart Blood Pump Using a Flexible Type Electrode with r.f. Plasma CVD Processing

2006 ◽  
Vol 956 ◽  
Author(s):  
Kazuya Kanasugi ◽  
Yasuharu Ohgoe ◽  
Katsuya Tsuchimoto ◽  
Keisuke Sato ◽  
Kenji K. Hirakuri ◽  
...  
Keyword(s):  
Artificial Heart ◽  
Carbon Film ◽  
Film Coating ◽  
Film Structure ◽  
Film Deposition ◽  
Blood Pump ◽  
Diamond Like Carbon ◽  
Dlc Film ◽  
Self Bias ◽  
Heart Blood

ABSTRACTDiamond-like carbon (DLC) film was deposited uniformly on an irregular structure such as a polyurethane artificial heart blood pump using a special 3-dimensional type electrode. Process of applying the DLC film coating is accomplished by inserting a large number of small metallic balls (φ0.8 mm chromium balls). It is then possible to adjust the shape of the electrode in such a way that the DLC film coating can be applied to the irregular surface of the artificial heart. In investigating the availability of the electrode, under helium (He) plasma, the plasma states were measured using double probe analysis. Lateral profiles of the electron temperature were higher in the centre and decreased towards the edges of the electrode. On the other hand, the plasma density profiles were lower in the centre part than at the edges. The electrode kept ion sheath on the artificial heart blood pump's surface at self-bias voltage uniformly. The results were that the DLC film was deposited completely on the artificial heart blood pump at the film thickness of approximately 350 - 380 nm. Additionally the film structure was uniform.

PIV Measurements of Flow in a Centrifugal Blood Pump: Steady Flow

2004 ◽  
Vol 127 (2) ◽  
pp. 244-253 ◽  
Author(s):  
Steven W. Day ◽  
James C. McDaniel
Keyword(s):  
Shear Stress ◽  
Artificial Heart ◽  
Heart Valves ◽  
Blood Pump ◽  
Reynolds Stresses ◽  
Centrifugal Blood Pump ◽  
Flow Rates ◽  
Blood Damage ◽  
Artificial Heart Valves ◽  
Stagnant Flow

Magnetically suspended left ventricular assist devices have only one moving part, the impeller. The impeller has absolutely no contact with any of the fixed parts, thus greatly reducing the regions of stagnant or high shear stress that surround a mechanical or fluid bearing. Measurements of the mean flow patterns as well as viscous and turbulent (Reynolds) stresses were made in a shaft-driven prototype of a magnetically suspended centrifugal blood pump at several constant flow rates (3–9L∕min) using particle image velocimetry (PIV). The chosen range of flow rates is representative of the range over which the pump may operate while implanted. Measurements on a three-dimensional measurement grid within several regions of the pump, including the inlet, blade passage, exit volute, and diffuser are reported. The measurements are used to identify regions of potential blood damage due to high shear stress and∕or stagnation of the blood, both of which have been associated with blood damage within artificial heart valves and diaphragm-type pumps. Levels of turbulence intensity and Reynolds stresses that are comparable to those in artificial heart valves are reported. At the design flow rate (6L∕min), the flow is generally well behaved (no recirculation or stagnant flow) and stress levels are below levels that would be expected to contribute to hemolysis or thrombosis. The flow at both high (9L∕min) and low (3L∕min) flow rates introduces anomalies into the flow, such as recirculation, stagnation, and high stress regions. Levels of viscous and Reynolds shear stresses everywhere within the pump are below reported threshold values for damage to red cells over the entire range of flow rates investigated; however, at both high and low flow rate conditions, the flow field may promote activation of the clotting cascade due to regions of elevated shear stress adjacent to separated or stagnant flow.

A New Type of the Motor-Driven Blood Pump for Artificial Heart

1990 ◽  
Vol 112 (4) ◽  
pp. 473-475 ◽  
Author(s):  
Gill J. Cheon ◽  
Hee C. Kim ◽  
Byoung G. Min ◽  
Dong C. Han
Keyword(s):  
Artificial Heart ◽  
Blood Pump ◽  
New Type

New concepts and new design of permanent maglev rotary artificial heart blood pumps

2006 ◽  
Vol 28 (4) ◽  
pp. 383-388 ◽  
Author(s):  
K.X. Qian ◽  
P. Zeng ◽  
W.M. Ru ◽  
H.Y. Yuan
Keyword(s):  
Artificial Heart ◽  
New Concepts ◽  
Blood Pumps ◽  
Heart Blood

903 Radial type magnetically suspended centrifugal blood pump for artificial heart

2000 ◽  
Vol 2000 (0) ◽  
pp. 245-246
Author(s):  
Hiroyuki ONUMA ◽  
Toru MASUZAWA ◽  
Yohji OKADA
Keyword(s):  
Artificial Heart ◽  
Blood Pump ◽  
Centrifugal Blood Pump

scholarly journals The Mechanics of Anatomy

1998 ◽  
Vol 120 (05) ◽  
pp. 81-83 ◽  
Author(s):  
Greg Paula
Keyword(s):  
Heart Disease ◽  
Design Process ◽  
Numerical Optimization ◽  
Artificial Heart ◽  
Complex Loading ◽  
Blood Pump ◽  
Artificial Muscles ◽  
Design Evolution ◽  
Human Arm ◽  
Pneumatic Artificial Muscles

Mechanical engineers are helping to make the most complex machine of all-the human bodywork better and last longer, with projects ranging from safer skis to a new artificial heart. Researchers are gaining insights into designing a new breed of machines by using pneumatic artificial muscles to simulate the movements of a human arm. Current research is centered around alpine snow skiing, which produces complex loading at the knee. This load can be represented by three force and three moment components. Safety requires the bindings to release before loading reaches a level where it could injure the knee. The cornerstone of the artificial-heart project is the development of a novel magnetically levitated turbo-blood pump, which is intended to serve as a remedy for people with what would otherwise be terminal heart disease. Named the StreamLiner, its design evolution is being governed by numerical optimization algorithms, thus automating the design process for maximum functionality and biocompatibility.

scholarly journals 213 CFD Study on Control of Oxigen Concentration in Vibrating Flow Blood Pump for Artificial Heart

2007 ◽  
Vol 2007.82 (0) ◽  
pp. _2-15_
Author(s):  
Tsubasa YONEMURA ◽  
Satoyuki KAWANO ◽  
Hirofumi Shintaku ◽  
Takashi ISOYAMA ◽  
Tomoyuki YAMAIE
Keyword(s):  
Artificial Heart ◽  
Blood Pump

Retrieval analyses of U-100 Total Artificial Heart blood-contacting surface

1991 ◽  
pp. 57-67
Author(s):  
Chisato Nojiri ◽  
Don B. Olsen ◽  
Teruo Okano ◽  
Harvey A. Jacobs ◽  
George M. Pantalos ◽  
...  
Keyword(s):  
Artificial Heart ◽  
Total Artificial Heart ◽  
Heart Blood

Development of an artificial heart actuator for a compliance chamberless blood pump

1991 ◽  
pp. 137-143
Author(s):  
Kou Imachi ◽  
Tsuneo Chinzei ◽  
Yuusuke Abe ◽  
Kunihiko Mabuchi ◽  
Kaoru Imanishi ◽  
...  
Keyword(s):  
Artificial Heart ◽  
Blood Pump
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