Mechanical heart, body fluid and drug infusion pump
First Claim
1. A body organ replacement for replacing a body organ having at least one inlet fluid vessel and at least one outlet fluid vessel, the body organ replacement comprising:
- a motor-driven scroll type pump including;
a) a biocompatible housing sized to fit within a body cavity including at least one inlet port and one outlet port, said ports to be connected to a vascular system of the body;
b) a first and a second scroll involute elements interfitting to make a plurality of line contacts therebetween, for defining at least one pair of fluid pockets; and
c) at least said first element moving in an orbital motion relative to said second element, such that said line contacts shift and cause said at least one pair of fluid pockets to change in volume while shifting toward said at least one outlet port, with the volume of each fluid pocket being gradually changed.
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Abstract
The present invention describes a new pump which can be used as a mechanical heart, as a body fluid, as a drug infusion pump, and in similar or related applications for the circulation of body fluids including but not limited to blood and oxygenated air. The pump includes a scroll type pump that has been modified for medical applications. The pump includes two scroll involute spiral elements that are maintained at an angular and radial offset so that both spiral elements interfit to make a plurality of line contacts between their spiral curved surfaces to thereby seal off and define at least one pair of fluid pockets. The relative orbital motion of the two spiral elements shifts the line contact along the spiral curved surfaces thus causing the fluid pockets to change in volume. Since the volume of the fluid pockets increases or decreases, depending on the direction of the orbital motion, the scroll type pump is capable of either compressing, expanding or pumping the body fluids.
14 Citations
20 Claims
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1. A body organ replacement for replacing a body organ having at least one inlet fluid vessel and at least one outlet fluid vessel, the body organ replacement comprising:
a motor-driven scroll type pump including; a) a biocompatible housing sized to fit within a body cavity including at least one inlet port and one outlet port, said ports to be connected to a vascular system of the body; b) a first and a second scroll involute elements interfitting to make a plurality of line contacts therebetween, for defining at least one pair of fluid pockets; and c) at least said first element moving in an orbital motion relative to said second element, such that said line contacts shift and cause said at least one pair of fluid pockets to change in volume while shifting toward said at least one outlet port, with the volume of each fluid pocket being gradually changed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A heart replacement for replacing a natural heart, comprising:
at least one motor-driven scroll type pump including; a) a biocompatible housing sized to fit within a body cavity including at least one inlet port and one outlet port, said ports to be connected to a vascular system of the body; b) a first and a second scroll involute elements interfitting to make a plurality of line contacts therebetween, for defining at least one pair of fluid pockets; and c) at least said first element moving in an orbital motion relative to said second element, such that said line contacts shift and cause said at least one pair of fluid pockets to change in volume while shifting toward said at least one outlet port, with the volume of each fluid pocket being gradually changed.
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15. A drug infusion pump comprising:
- at least one motor-driven scroll type pump including;
a) a biocompatible housing sized to fit within a body cavity including at least one inlet port and one outlet port, said ports t be connected to a vascular system of the body; b) a first and a second scroll involute elements interfitting to make a plurality of line contacts therebetween, for defining at least one pair of fluid pockets; and c) at least said first element moving in an orbital motion relative to said second element, such that said line contacts shift and cause said at least one pair of fluid pockets to change in volume while shifting toward said at least one outlet port, with the volume of each fluid pocket being gradually changed. - View Dependent Claims (16, 17, 18, 19, 20)
- at least one motor-driven scroll type pump including;
Specification