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Two-stage rotor powered blood pump

A rotor and pump housing technology, applied in the field of two-stage rotor powered blood pumps, can solve problems such as limited donor organs

Active Publication Date: 2015-08-19
THE CLEVELAND CLINIC FOUND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the limited availability of donor organs, CHF patients have to wait until a suitable donor organ is placed

Method used

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  • Two-stage rotor powered blood pump
  • Two-stage rotor powered blood pump
  • Two-stage rotor powered blood pump

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Experimental program
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Embodiment approach

[0045] It has been found that, for constant system impedance, output flow and pump speed have a linear relationship. As a result, the control algorithm executed by controller 82 adjusts the pump speed to provide regular system flow. Balanced system flow and lung flow are achieved by adjusting the axial position of rotor assembly 30 . According to the first embodiment of the invention, axial adjustment of the rotor assembly 30 occurs inherently or automatically due to the structure of the left and right impellers 34, 36 and hydraulic pressure.

[0046] Because the axial hydraulic forces acting on the support plate portions 110 and 120 of the impellers 34 and 36 are primarily generated by the pump inlet pressure, the axial position of the rotor assembly 30 is responsive to the pressure differential between the left inlet portion 92 and the right inlet portion 102 to adjust. As the axial position of the rotor assembly 30 is adjusted, the geometry and hydraulic performance of th...

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Abstract

A pump (10) includes a stator housing (22), a stator (20) supported in the housing, and a rotor assembly (30). The rotor assembly (30) includes a rotor (32) supported in the housing for rotation relative to the stator (20) about an axis (12). The rotor assembly (30) also includes a first impeller (34) operatively coupled to a first axial end of the rotor (32) for rotation with the rotor about the axis (12). The rotor assembly further includes a second impeller (36) operatively coupled to a second axial end of the rotor (32), opposite the first axial end, for rotation with the rotor about the axis (12). The rotor assembly (30) is movable along the axis (12) relative to the housing to adjust hydraulic performance characteristics of the pump (10).

Description

technical field [0001] The present invention relates to a pump that can be used in fluid transfer applications in which two streams of liquid are kept in balance. More specifically, the present invention relates to a two-stage rotorkinetic pump configuration for providing pulsatile, continuous flow, blood pumping performance. Background of the invention [0002] Congestive heart failure (CHF) is an increasingly common cause of cardiovascular disability and premature death. Despite advances in medical therapy, heart transplantation remains the main modality used to treat patients with advanced congestive heart failure. However, due to the limited availability of donor organs, CHF patients have to wait until a suitable donor organ is placed. Blood-pumping devices, known as cardiac assist devices (VAD) and total artificial hearts (TAH), can be used as bridging treatment options for patients with CHF and other cardiac conditions who would otherwise have a suitable donor in pla...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D1/06F04D29/42A61M60/196A61M60/232A61M60/422A61M60/562A61M60/82
CPCF04D15/0033A61M1/1031A61M1/101A61M1/1017F04D13/14A61M1/12F04D15/0027A61M1/1015A61M60/824A61M60/82A61M60/422A61M60/148A61M60/232A61M60/196
Inventor 大卫·霍瓦斯伦纳德·A·R·郭丁亚历克斯·马希耶罗
Owner THE CLEVELAND CLINIC FOUND