Multi-Axis Surgical Retractor Arms for Controlled Tissue Displacement

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Solution Overview

Problem

Existing retractor systems cause significant trauma to tissue during surgical procedures due to inadequate control and refinement of tissue displacement, limiting access and visibility at the surgical site.

Innovation Solution

A multi-axis retractor system with independently translatable arms and blades, featuring a slideable connection mechanism that allows for precise control over tissue retraction, including pivoting and separation of blades, and optional integration of radiolucent materials for improved visibility during procedures like X-ray imaging.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If traditional retractor systems are used to provide access to the surgical site, then the surgeon can access the surgical site, but significant trauma is caused to the tissue due to inadequate control of tissue displacement

Engineering Contradiction:

Improvetissue displacement controlVSAvoidtissue trauma

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The retractor system is divided into multiple independently controllable arms (first arm, second arm, third arm) that can be translated and positioned separately. Each arm can be independently adjusted to control tissue displacement in different directions, allowing precise control over the retraction force applied to tissue, thereby reducing unnecessary trauma while maintaining surgical access.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The retractor arms are designed with dynamic translation capabilities along multiple axes (longitudinal and transverse directions), allowing real-time adjustment of arm positions during surgery. This dynamic control enables the surgeon to refine tissue displacement control continuously, adapting to tissue response and minimizing harmful forces on the tissue throughout the procedure.

Inventive Principle:

Principle #15Dynamics

2Ease of operation

If multiple arms are added to improve tissue displacement control, then tissue trauma is reduced, but device complexity increases

Engineering Contradiction:

Improvetissue retraction controlVSAvoidretractor system structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

Each arm of the retractor system is designed as a multi-functional unit that can translate along both longitudinal and transverse axes, and can be independently positioned. The arms serve multiple functions: providing retraction force, controlling tissue displacement direction, and enabling surgical access. This multi-functionality reduces the need for additional separate mechanisms, thereby limiting the increase in device complexity while maintaining improved tissue control.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20250275827A1Retracting tissue

Publication Date: 2025.09.04 GLOBUS MEDICAL INC

AI summary

Surgical retractors and methods thereof for retracting body tissue in a therapeutic procedure. The surgical retractor may include retractor blades have openings or channels configured to receive bone pins while maintaining accessibility and visibility of the operative window.