Selection of Artificial Heart Devices

2020 ◽  
pp. 129-145
Author(s):  
Yan Zhang
Keyword(s):  
Artificial Heart ◽  
Selection Of

HEART PUMP AND OXYGENATOR

PEDIATRICS ◽  
1957 ◽  
Vol 19 (6) ◽  
pp. 1124-1128
Author(s):  
W. T. Mustard
Keyword(s):  
World War Ii ◽  
Artificial Heart ◽  
Heart Surgery ◽  
Human Subjects ◽  
Open Heart Surgery ◽  
World War ◽  
Heart Pump ◽  
The World ◽  
Cardiac Bypass ◽  
Selection Of

THIS PAPER is a general review of the development of the artificial heart-lung to facilitate open-heart surgery. At the close of World War II many centers began investigating the possibility of total cardiac bypass. Oven the past decade, pump oxygenerators of various types have become popular and recent clinical successes throughout the world have given further impetus to the study of problems posed by the artificial heart-lung apparatus. The subject divides itself into three separate parts, the first two being concerned with the maintenance of life in an experimental animal during a total cardiac bypass. One must take all the blood from the animal and return it to the animal by means of a pump. Secondly, one must oxygenate the blood before returning it. The third part of the problem confronting the surgeon is the selection of cases and correction of defects in human subjects. The pumping mechanism must duplicate as nearly as possible the action of the chambers of the heart. Pumping action must be smooth so as to prevent hemolysis and to avoid turbulence with thrombosis. It is not difficult to construct a pump with which hemolysis can be kept to relatively negligible amounts. Most of the pumps in use throughout the world give an hemolysis of less than 50 mg of hemoglobin per 100 ml of blood, which is perfectly safe. Turbulence with thrombosis can be overcome by removing valves inside the stream and placing valves outside of, rather than within the stream of blood. Furthermore, heparinization of the blood lessens the tendency to thrombosis.

OPTIMUM SELECTION OF IMPLANTABLE SECONDARY BATTERY FOR ARTIFICIAL HEART BY EXAMINATION OF LIFE CYCLE TEST

ASAIO Journal ◽  
2001 ◽  
Vol 47 (2) ◽  
pp. 144
Author(s):  
E. Okamoto ◽  
K. Watanabe ◽  
M. Takeda ◽  
S. Fukuoka ◽  
E. Iwazawa ◽  
...  
Keyword(s):  
Life Cycle ◽  
Artificial Heart ◽  
Secondary Battery ◽  
Optimum Selection ◽  
Selection Of

Optimum Selection of an Implantable Secondary Battery for an Artificial Heart by Examination of the Cycle Life Test

ASAIO Journal ◽  
2002 ◽  
Vol 48 (5) ◽  
pp. 495-502 ◽  
Author(s):  
Eiji Okamoto ◽  
Kazuya Watanabe ◽  
Kunihiro Hashiba ◽  
Taku Inoue ◽  
Eichi Iwazawa ◽  
...  
Keyword(s):  
Artificial Heart ◽  
Cycle Life ◽  
Life Test ◽  
Secondary Battery ◽  
Optimum Selection ◽  
Selection Of

Selection of a Rechargeable Internal Back-up Battery for a Totally Implantable Artificial Heart

ASAIO Journal ◽  
1999 ◽  
Vol 45 (4) ◽  
pp. 339-343 ◽  
Author(s):  
HIROYUKI HONDA ◽  
KINJI SHIBA ◽  
EIMEI SHU ◽  
KOHJI KOSHIJI ◽  
TAKEJI MURAI ◽  
...  
Keyword(s):  
Artificial Heart ◽  
Selection Of

Selection of a Polyurethane Membrane for the Manufacture of Ventricles for a Totally Implantable Artificial Heart: Blood Compatibility and Biocompatibility Studies

2000 ◽  
Vol 24 (11) ◽  
pp. 879-888 ◽  
Author(s):  
Marie‐Claire Bélanger ◽  
Yves Marois ◽  
Raynald Roy ◽  
Yahye Mehri ◽  
Eric Wagner ◽  
...  
Keyword(s):  
Artificial Heart ◽  
Blood Compatibility ◽  
Heart Blood ◽  
Selection Of ◽  
Polyurethane Membrane

Cognitive gadgets and cognitive priors

2019 ◽  
Vol 42 ◽  
Author(s):  
Gian Domenico Iannetti ◽  
Giorgio Vallortigara
Keyword(s):  
Cognitive Neuroscience ◽  
Selection Of

Abstract Some of the foundations of Heyes’ radical reasoning seem to be based on a fractional selection of available evidence. Using an ethological perspective, we argue against Heyes’ rapid dismissal of innate cognitive instincts. Heyes’ use of fMRI studies of literacy to claim that culture assembles pieces of mental technology seems an example of incorrect reverse inferences and overlap theories pervasive in cognitive neuroscience.

Note on Selection of Coordinate Systems for Geodynamics

1975 ◽  
Vol 26 ◽  
pp. 395-407
Author(s):  
S. Henriksen
Keyword(s):  
Sea Level ◽  
The Other ◽  
Coordinate Systems ◽  
Mean Sea Level ◽  
The Earth ◽  
The One ◽  
Static Systems ◽  
Selection Of

The first question to be answered, in seeking coordinate systems for geodynamics, is: what is geodynamics? The answer is, of course, that geodynamics is that part of geophysics which is concerned with movements of the Earth, as opposed to geostatics which is the physics of the stationary Earth. But as far as we know, there is no stationary Earth – epur sic monere. So geodynamics is actually coextensive with geophysics, and coordinate systems suitable for the one should be suitable for the other. At the present time, there are not many coordinate systems, if any, that can be identified with a static Earth. Certainly the only coordinate of aeronomic (atmospheric) interest is the height, and this is usually either as geodynamic height or as pressure. In oceanology, the most important coordinate is depth, and this, like heights in the atmosphere, is expressed as metric depth from mean sea level, as geodynamic depth, or as pressure. Only for the earth do we find “static” systems in use, ana even here there is real question as to whether the systems are dynamic or static. So it would seem that our answer to the question, of what kind, of coordinate systems are we seeking, must be that we are looking for the same systems as are used in geophysics, and these systems are dynamic in nature already – that is, their definition involvestime.

Measurements of the Cape Astrometric Survey of the Southern Hemisphere

1978 ◽  
Vol 48 ◽  
pp. 515-521
Author(s):  
W. Nicholson
Keyword(s):  
Southern Hemisphere ◽  
Automatic Measuring ◽  
Measuring Machine ◽  
Final Selection ◽  
Selection Of

SummaryA routine has been developed for the processing of the 5820 plates of the survey. The plates are measured on the automatic measuring machine, GALAXY, and the measures are subsequently processed by computer, to edit and then refer them to the SAO catalogue. A start has been made on measuring the plates, but the final selection of stars to be made is still a matter for discussion.

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