Magnetically Actuated Gating Device for Vessel Patency Control

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Solution Overview

Problem

Existing medical devices for controlling the patency of vessels, such as arteriovenous fistulas, are difficult to manipulate between configurations, leading to complications during hemodialysis and fistula maturation.

Innovation Solution

Magnetically actuated gating devices with a housing, rotatable member, and compression member that interact with external magnetic fields to control vessel patency by altering the cross-sectional area of the vessel lumen, allowing for regulated blood flow.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If existing medical devices are used to control vessel patency, then vessel flow can be regulated, but the devices are difficult to manipulate between configurations

Engineering Contradiction:

Improveease of manipulationVSAvoiddevice complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent replaces complex mechanical manipulation mechanisms with a magnetic actuation system. An external magnet interacts with a magnetic element inside the device to rotate a drive shaft, which then actuates the compression member through a rack-and-pinion mechanism. This substitution eliminates the need for complex external manipulation mechanisms while maintaining precise control capability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces a magnetic element as an intermediary between the external actuator and the internal mechanical components. The magnetic element transmits rotational force from the external magnet to the drive shaft without requiring direct mechanical connection, simplifying the overall device structure while enabling easy external control.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If magnetically actuated gating devices are used, then external control of vessel patency is achieved, but the device structure becomes more complex

Engineering Contradiction:

Improveexternal control capabilityVSAvoiddevice complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent replaces complex external mechanical manipulation systems with a magnetic actuation system. The external magnet interacts with the magnetic element to provide remote control capability, eliminating the need for complex external mechanical linkages while achieving versatile control of vessel patency.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The magnetic actuation mechanism serves multiple functions: it provides external control capability, enables rotation of the drive shaft, and actuates the compression member through the rack-and-pinion mechanism. This multi-functionality reduces the need for separate mechanisms, thereby managing device complexity while enhancing adaptability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Productivity

If compression member is used to alter vessel cross-sectional area, then blood flow is regulated, but manipulation difficulty increases

Engineering Contradiction:

Improveflow regulation precisionVSAvoidmanipulation ease

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The patent replaces difficult manual manipulation of the compression member with magnetic actuation. The external magnet rotates the drive shaft, which through the rack-and-pinion mechanism, precisely controls the compression member's movement. This substitution maintains precise flow regulation while dramatically improving ease of operation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The magnetic element acts as an intermediary that translates external magnetic field interactions into precise rotational motion of the drive shaft. This intermediary mechanism enables fine control of the compression member's position and force application, achieving precise flow regulation without difficult manipulation.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 devices provide a mechanism for externally controlling vessel patency and flow rates, reducing complications associated with AVFs and assisting in fistula maturation by allowing for precise regulation of blood flow during and after treatment.

Implementation Method 1

The rotatable member is disposed within the first passageway and has a second magnetic field that is adapted to interact with the first magnetic field such that the rotatable member moves from its first position to its second position when the element is moved in the first direction

Methodology Applied

Scientific EffectMagnetic field interaction: Magnetic Field

Data Source

PatentUS10039552B2Magnetically actuated gating devices, systems, kits, and methods

Publication Date: 2018.08.07 COOK MEDICAL TECHNOLOGIES LLC

AI summary

Magnetically actuated gating devices, magnetically actuated gating systems, magnetically actuated gating kits, and methods of treatment using a magnetically actuated gating device are described herein. An example embodiment of a magnetically actuated gating device comprises a housing, a rotatable member, a compression member, and a membrane. The rotatable member has a first magnetic field that is configured to interact with a second magnetic field produced by an external element to move the rotatable member between a first position and a second position.