Oscillating Blade Bone Resection Device

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Solution Overview

Problem

Current surgical instruments for resecting soft tissue or bone in constrained environments, such as minimally-invasive procedures, suffer from poor ergonomics leading to musculoskeletal disorders, reduced accuracy, and risk of nerve damage due to inadequate control and visualization, with existing tools often obstructing the surgeon's view and causing unintentional trauma.

Innovation Solution

A powered cutting system with an oscillating or continuously rotating blade, housed within a mechanism that prevents unintentional tissue resection, utilizing a mechanical transmission or oscillator to achieve high-frequency oscillations, and featuring ergonomic design and visualization aids to minimize nerve damage and improve precision.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a rotating blade is used for tissue resection, then cutting efficiency is improved, but the risk of nerve damage increases due to tissue tangling and excessive strain

Engineering Contradiction:

Improvecutting efficiencyVSAvoidnerve damage risk

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent applies mechanical vibration by oscillating the blade back and forth in a limited angular range rather than continuous rotation. This oscillating motion reduces the risk of nerve tissue tangling and excessive strain while maintaining effective cutting through high-frequency vibrations that enable efficient tissue resection.

Inventive Principle:

Principle #18Mechanical vibration

Solution Approach 2:

The blade motion is changed from static continuous rotation to dynamic oscillating motion with variable angular displacement. The blade oscillates within a limited angular range and can be controlled to adapt to different tissue types and surgical requirements, optimizing both cutting efficiency and safety.

Inventive Principle:

Principle #15Dynamics

2Device complexity

If manual operation is used for resection instruments, then device complexity is reduced, but surgeon fatigue and reduced accuracy occur due to high muscle activation requirements

Engineering Contradiction:

Improveinstrument structureVSAvoidsurgeon fatigue and accuracy

Core Design Contradiction:

Device complexityVSEase of operation

Solution Approach 1:

The patent replaces manual mechanical operation with a powered oscillating mechanism. The instrument includes a motor-driven oscillating blade that eliminates the need for high muscle activation, reducing surgeon fatigue while maintaining precise control through the oscillating motion mechanism.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If the cutting tool is exposed for direct access to tissue, then resection speed is improved, but unintentional tissue trauma increases due to obstructed visualization

Engineering Contradiction:

Improveresection speedVSAvoidunintentional tissue trauma

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent employs a shield with controlled openings that acts as a protective barrier between the oscillating blade and surrounding tissues. The shield allows visualization of the cutting site while preventing accidental contact with adjacent structures, and the oscillating blade motion enables effective cutting through the controlled exposure.

Inventive Principle:

Principle #30Flexible shells and thin films

4Force

If high force is applied for tissue resection, then cutting power is improved, but nerve damage and tissue destruction increase

Engineering Contradiction:

Improvecutting powerVSAvoidnerve damage and tissue destruction

Core Design Contradiction:

ForceVSObject-affected harmful factors

Solution Approach 1:

The patent uses high-frequency oscillating vibrations of the blade to achieve effective tissue cutting with reduced force application. The vibrational motion enables the blade to slice through tissue and bone more efficiently without requiring excessive force, thereby reducing the risk of nerve damage and unwanted tissue destruction.

Inventive Principle:

Principle #18Mechanical vibration

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 reduces musculoskeletal strain, enhances accuracy, and minimizes nerve damage by using high-frequency oscillations to slice bone with less force, while providing improved visualization and control, thus facilitating safer and more efficient tissue resection in constrained surgical environments.

Implementation Method 1

high frequency oscillations can enable the blade to slice bone with less force and damage

Methodology Applied

Scientific EffectHigh-frequency oscillations: Vibration

Data Source

PatentUS11413056B2Bone and tissue resection devices and methods

Publication Date: 2022.08.16 MEDOS INT SARL

AI summary

Embodiments of a cutting assembly for a bone and tissue resection device bone disclosed herein. In one embodiment, a cutting assembly can include a blade shaft having a distal end with an arcuate blade, a sleeve surrounding the blade shaft and arcuate blade, the sleeve having a distal end defining an opening sized and shaped to allow the arcuate blade to translate distally beyond the distal end of the sleeve, a footplate positioned beyond the distal end of the sleeve and configured to resist distal movement of material being cut by the arcuate blade when the arcuate blade is translated distally against the material, and a support extending from the distal end of the sleeve to the footplate, the support element defining a cutting region between the distal end the sleeve and the footplate.