Intra-aortic spiral balloon pump

Abstract

An intra-aortic balloon pump (IABP) is provided that has a series of spiral pleats that function to control the wash of blood associated with an inflation cycle. Additionally, the torsional expansionincreases the net efficiency of the IABP relative to a conventional cylindrically shaped balloon. The inflating membrane is textured to promote natural growth of a biologic lining on the surface of the indwelling pump to reduce the need for anticoagulation and the risk of thromboembolic events; promote washing of the surface to minimize stasis and thrombus formation; minimize strain on the IABP; minimize elongation radially and longitudinally to avoid fatigue of the IABP; minimize stretching and stress distribution along a balloon; promote a sweeping effect through the channels in the non-expanded state to wash the surface; or a combination thereof.

Description

[0001] related application [0002] This application claims priority to U.S. Provisional Application Serial No. 62 / 510,561, filed May 24, 2017; the contents of which are incorporated into this application by reference. technical field [0003] The present invention relates generally to cardiac assist devices, and in particular to a spiral balloon pump for insertion into a patient's aorta to enhance cardiac output. Background technique [0004] It is known that temporary intra-aortic balloon pumps are inserted through the femoral artery of the leg for emergency patient treatment. The purpose of the initial temporary use of the pump is for ambulatory patients to use it only for a few hours to a few days in an emergency. Temporary intra-aortic balloon pumps are limited in size to prevent complete occlusion of the aortic lumen and / or any branch arteries, so that the pressure at each site remains balanced at all times, and are passed percutaneously through the route of introduc...

AI Technical Summary

Problems solved by technology

The folding and wrapping of the material raises concerns about damage to the balloon pump material, which could lead to premature failure when subjected to multiple pumping cycles if a particular patient must be used for extended periods of time beyond a few days

In addition, the limited cross-sectional area of ​​the power conduit to the pump further limits the success of this device

[0005] Subsequent generations of intraaortic balloon pumps (IABPs) have increased the effective pumping volume of such devices, but problems remain in controlling the flushing of blood over the balloon for efficient operation

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