Percutaneous Magnetic Pumping System for Hemodynamic Support

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Solution Overview

Problem

Current hemodynamic support systems face challenges in providing efficient and minimally invasive blood perfusion, particularly in patients with inadequate blood circulation, as they often require large insertion devices and generate excessive heat, which can cause tissue damage and are limited by the size of accessible blood vessels.

Innovation Solution

A percutaneous pumping system powered by a magnetic motor, featuring a rotatable magnet and impeller within a pumping sleeve or expandable stent, driven by an external magnetic field, which reduces heat generation and allows for smaller insertion devices, enabling efficient blood perfusion without the need for internal motor conductors or superconductors.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If conventional motor-driven pumping systems are used, then sufficient pumping power can be achieved, but heat generation increases causing tissue damage and device size increases requiring larger insertion devices

Engineering Contradiction:

Improvepumping powerVSAvoidheat generation

Core Design Contradiction:

PowerVSTemperature

Solution Approach 1:

The patent replaces the conventional motor-driven pumping system with a magnetic field-driven system. Instead of using a mechanical motor that generates heat through electrical resistance and friction, the invention uses an external magnetic field to directly drive the impeller rotation. This substitution eliminates the need for internal motor conductors and superconductors, thereby reducing heat generation while maintaining sufficient pumping power to circulate at least 5 liters of blood per minute.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Power

If conventional motor-driven pumping systems are used, then sufficient pumping power can be achieved, but device complexity increases requiring internal motor conductors and superconductors

Engineering Contradiction:

Improvepumping powerVSAvoidinternal motor components

Core Design Contradiction:

PowerVSDevice complexity

Solution Approach 1:

The patent extracts and removes the internal motor components (conductors and superconductors) from the pumping device. By using an external magnetic field source positioned outside the patient's body, the invention eliminates the need for complex internal motor assemblies. This simplification allows the pumping device to be inserted through smaller vascular access points while still providing sufficient pumping power through the magnetic field-driven impeller mechanism.

Inventive Principle:

Principle #2Taking out (Extraction)

3Ease of operation

If larger insertion devices are used to accommodate motor components, then motor function can be achieved, but vascular access is limited by the size of accessible blood vessels

Engineering Contradiction:

Improvemotor functionVSAvoidvascular access size

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The patent replaces the mechanical motor system with a magnetic field-driven system that requires minimal internal components. The external magnetic field source eliminates the need for large motor housings and internal conductors, allowing the insertion device to be significantly smaller. This enables the device to be introduced through smaller vascular access points such as the femoral artery or other peripheral vessels, greatly improving adaptability to different vascular access locations and patient anatomies.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The system effectively pumps at least 5 liters of blood per minute with reduced heat build-up, facilitating hemodynamic support in various vascular locations while minimizing tissue damage and accommodating smaller vascular access points.

Implementation Method 1

The at least one first magnet is configured and arranged to be driven to rotate by a magnetic field generated external to the pumping sleeve

Methodology Applied

Scientific EffectMagnetic field: Magnetic Field

Implementation Method 2

A percutaneous pumping system powered by a magnetic motor, featuring a rotatable magnet and impeller within a pumping sleeve or expandable stent, driven by an external magnetic field

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS8734508B2Systems and methods for making and using percutaneously-delivered pumping systems for providing hemodynamic support

Publication Date: 2014.05.27 BOSTON SCIENTIFIC SCIMED INC

AI summary

A percutaneous pumping system for providing hemodynamic support to a patient includes a pumping sleeve that defines a lumen extending along the length of the pumping sleeve. The pumping sleeve is configured and arranged for insertion into patient vasculature. At least one rotatable magnet is disposed in the pumping sleeve. The at least one first magnet is configured and arranged to be driven to rotate by a magnetic field generated external to the pumping sleeve. At least one impeller is coupled to the at least one magnet. Rotation of the at least one magnet causes a corresponding rotation of the at least one impeller. An anchoring arrangement is coupled to the pumping sleeve. The anchoring arrangement is configured and arranged to anchor the pumping sleeve at a target pumping location when the pumping sleeve is inserted into patient vasculature.