Flow pattern analysis of the Baylor total artificial heart.

Abstract:

:To obtain an optimal design of the left blood chamber of the total artificial heart (TAH), flow visualization studies were performed. Information on velocities in critical areas of the left chamber was gathered using sectional pulsed laser light. The flow patterns on the entire pumping duration were photographed frame by frame. The inflow port, the opposite of the inflow and outflow of the pump (bottom area), and the diaphragm/housing junction were the focal areas. The pump conditions, such as chamber pressure, preload and afterload pressure, pumping rate and roller screw, and displacement were recorded. Major stagnations and a low washout effect were observed in the bottom region. The closing of the inflow valve was irregular. In order to solve this problem, the inflow valve angle was changed 20 degrees. A comparison study showed a better valve closing characteristic, and no stagnation areas were observed with this new valve angle. Various velocity profiles confirmed the results. The valve closing characteristics is described in relationship to back flow.

journal_name

Artif Organs

journal_title

Artificial organs

authors

Meier D,Wernicke JT,Orime Y,Takatani S,Tasai K,Damm G,Naito K,Mizuguchi K,Makinouchi K,Glueck J

doi

10.1111/j.1525-1594.1994.tb03345.x

subject

Has Abstract,Author List Incomplete

pub_date

1994-12-01 00:00:00

pages

923-32

issue

12

eissn

0160-564X

issn

1525-1594

journal_volume

18

pub_type

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