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Catheter pump assembly including a stator

a catheter and stator technology, applied in the direction of catheters, prostheses, therapy, etc., can solve the problems of insufficient flow, too large to be advanced percutaneously, and high mortality rate, so as to minimize turbulence and minimize losses

Inactive Publication Date: 2016-02-04
TC1 LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a design for an impeller and flow modifying structure that minimizes losses and reduces turbulence at the boundary between them. The impeller has a blade with a trailing edge at an angle of more than 60 degrees to the longitudinal axis of the impeller. The angles of the impeller and flow modifying structure are approximately the same. This design improves the efficiency of the impeller and flow modifying structure.

Problems solved by technology

Heart disease is a major health problem that has high mortality rate.
Fixed cross-section ventricular assist devices designed to provide near full heart flow rate are either too large to be advanced percutaneously (e.g., through the femoral artery without a cutdown) or provide insufficient flow.
While the flow rate of a rotary pump can be increased by rotating the impeller faster, higher rotational speeds are known to increase the risk of hemolysis, which can lead to adverse outcomes and in some cases death.

Method used

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  • Catheter pump assembly including a stator
  • Catheter pump assembly including a stator
  • Catheter pump assembly including a stator

Examples

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Embodiment Construction

[0055]This application is directed to apparatuses for inducing motion of a fluid relative to the apparatus. In particular, the disclosed embodiments generally relate to various configurations for an impeller disposed at a distal portion of a percutaneous catheter pump. For example, FIGS. 1-4 show aspects of an exemplary catheter pump 10 that can provide high performance flow rates. The exemplary pump 10 includes a motor driven by a controller 22. The controller 22 directs the operation of the motor 14 and an infusion system 26 that supplies a flow of infusate in the pump 10. A catheter system 80 that can be coupled with the motor 14 houses an impeller within a distal portion thereof. In various embodiments, the impeller is rotated remotely by the motor 14 when the pump 10 is operating. For example, the motor 14 can be disposed outside the patient. In some embodiments, the motor 14 is separate from the controller 22, e.g., to be placed closer to the patient. In other embodiments, the...

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PUM

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Abstract

A catheter pump assembly is provided that includes a proximal a distal portion, a catheter body, an impeller, and a flow modifying structure. The catheter body has a lumen that extends along a longitudinal axis between the proximal and distal portions. The impeller is disposed at the distal portion. The impeller includes a blade with a trailing edge. The flow modifying structure is disposed downstream of the impeller. The flow modifying structure has a plurality of blades having a leading edge substantially parallel to and in close proximity to the trailing edge of the blade of the impeller and an expanse extending downstream from the leading edge. In some embodiments, the expanse has a first region with higher curvature and a second region with lower curvature. The first region is between the leading edge and the second region.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]This application is directed to pumps for mechanical circulatory support of a heart. In particular, this application is directed to various implementations of a stator that can be used to enhance flow and / or performance of a catheter pump.[0003]2. Description of the Related Art[0004]Heart disease is a major health problem that has high mortality rate. Physicians increasingly use mechanical circulatory support systems for treating heart failure. The treatment of acute heart failure requires a device that can provide support to the patient quickly. Physicians desire treatment options that can be deployed quickly and minimally-invasively.[0005]Intra-aortic balloon pumps (IABP) are currently the most common type of circulatory support devices for treating acute heart failure. IABPs are commonly used to treat heart failure, such as to stabilize a patient after cardiogenic shock, during treatment of acute myocardial infarctio...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61M60/13A61M60/221A61M60/237A61M60/812A61M60/818
CPCA61M1/1024A61M1/1017A61M1/1031A61M1/1008A61M1/125A61M1/1086A61M5/14236A61M5/14212A61M25/0068A61M2025/0073A61M2210/125A61M60/414A61M60/812A61M60/237A61M60/13A61M60/818A61M60/221A61M60/416A61M60/808A61M60/806A61M60/422A61M60/824A61M60/148
Inventor ZENG, ZIJING
Owner TC1 LLC
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