Medical Handle Cable Routing for Electromagnetic Noise Suppression

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Solution Overview

Problem

Medical devices with flexible cable bundles are susceptible to noise along the cable lines, necessitating improved cable routing and handle assemblies to reduce noise.

Innovation Solution

The medical device incorporates a flexible elongate cable bundle that is folded upon itself in an organized manner within the handle, with a shield layer removed from the cable bundle before passing through an electrical noise suppression member, such as a ferrite bead, and is routed to suppress electromagnetic interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If the cable bundle is routed through the handle without removing the shield layer, then the cable bundle maintains its structural integrity, but electromagnetic interference and noise increase

Engineering Contradiction:

Improveelectromagnetic interferenceVSAvoidcable routing complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The cable bundle is segmented into two parts: the shield layer is separated from the inner conductor elements. This segmentation allows the shield to be routed differently (through the ferrite bead) while the inner conductors follow a separate path, enabling independent optimization of electromagnetic interference suppression and signal transmission.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The ferrite bead acts as an intermediary component that the shield layer passes through. This intermediary provides magnetic shielding and suppresses high-frequency electromagnetic interference without affecting the inner conductor elements, which remain isolated from the ferrite bead.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Volume of moving object

If the cable bundle is folded in an organized manner within the handle, then space is efficiently utilized, but the risk of electromagnetic interference increases

Engineering Contradiction:

Improvehandle space utilizationVSAvoidelectromagnetic interference

Core Design Contradiction:

Volume of moving objectVSObject-affected harmful factors

Solution Approach 1:

The cable bundle is divided such that only the shield layer is folded within the handle in an organized manner, while the inner conductors are routed separately without folding. This segmentation allows compact space utilization for the shield while maintaining clean signal paths for the inner conductors, reducing electromagnetic interference.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The inner conductor elements are extracted from the folded region of the cable bundle. By removing the sensitive inner conductors from the folded area where the shield layer is compressed, the design prevents electromagnetic interference while maintaining efficient space utilization through shield layer folding.

Inventive Principle:

Principle #2Taking out (Extraction)

3Object-affected harmful factors

If the shield layer is removed before the ferrite bead, then electromagnetic interference is reduced, but the assembly process becomes more complex

Engineering Contradiction:

Improvenoise in cable linesVSAvoidassembly process

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The shield layer is pre-separated from the inner conductors at a designated separation point within the handle, before reaching the ferrite bead. This preliminary action is performed during the assembly process, allowing the shield to be routed through the ferrite bead while the inner conductors are already positioned in their final locations, simplifying the overall assembly sequence.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

A guide structure or intermediary component is provided within the handle to facilitate the separation and routing of the shield layer through the ferrite bead. This intermediary guides the shield layer through the noise suppression member while maintaining proper alignment and positioning, making the assembly process more manageable despite the additional step of shield removal.

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 solution effectively reduces electromagnetic interference and noise in the cable bundles, enhancing the performance of medical devices by improving emission and immunity.

Implementation Method 1

an electrical noise suppression member that is disposed within the handle... the electrical noise suppression member may comprise a ferrite bead... one or both of a material or configuration adapted to suppress electromagnetic interference from the elongate cable bundle

Methodology Applied

Scientific EffectElectromagnetic interference suppression: Electromagnetic Induction

Data Source

PatentUS20250255578A1Cable routing and assemblies for medical device handles

Publication Date: 2025.08.14 NUVERA MEDICAL INC

AI summary

Medical devices that include a medical tool, a handle and a flexible cable bundle passing through the handle. The handles and cable routing therethrough are adapted to reduce noise within the cable.