Passive cardiac restraint systems having multiple layers of inflatable elements
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United States of America Patent
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Apr 15, 2003
Grant Date -
N/A
app pub date -
Nov 28, 2000
filing date -
Nov 28, 2000
priority date (Note) -
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Abstract
A non-blood contacting, implantable heart assist system surrounds the natural heart and provides resistance to cardiac hypertrophy. The restraint system is composed of adjacent tube pairs arranged along a bias with respect to the axis of the heart and bound in a non-distensible sheath forming a heart wrap. The tube pairs are tapered at both ends such that when they are compressed they approximately follow the surface of the myocardium. Inflation of the tube pairs with a compressible fluid causes the wrap to exert a restraining force on the heart to prevent overexpansion during diastole.
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