Modular Surgical Retractors for Stable, Adjustable Spinal Access

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Solution Overview

Problem

Existing surgical retractors face challenges in providing stable access to spinal surgical sites, especially during lateral approaches, with issues related to maintaining orientation, adjustability, and minimizing tissue trauma.

Innovation Solution

Surgical retractors with a base portion and two retractor blades, featuring ratchet mechanisms for adjustment, alignment features for proper orientation, and modular designs to accommodate various surgical needs, allowing for adjustable and orthogonal corridors.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing surgical retractors are used for lateral approaches to the spine, then access to the surgical site is provided, but stable access and proper orientation are difficult to maintain

Engineering Contradiction:

Improvestability of access to surgical siteVSAvoidease of maintaining orientation

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The retractor system incorporates adjustable blades that can be independently positioned and locked at various angles relative to the base portion, allowing dynamic adaptation to different surgical site geometries while maintaining stable access. The adjustability mechanisms enable the surgeon to optimize the configuration for each specific surgical scenario.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The retractor blades are designed with asymmetric geometries and non-uniform thickness profiles that provide inherent stability and prevent rotation during insertion and use. The asymmetric design ensures proper orientation through mechanical constraints rather than relying solely on surgeon skill, thereby improving both stability and ease of operation.

Inventive Principle:

Principle #4Asymmetry

2Adaptability or versatility

If fixed configuration retractors are used, then device simplicity is maintained, but adaptability to various surgical requirements is limited

Engineering Contradiction:

Improveadaptability to surgical requirementsVSAvoidcomplexity of retractor structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The retractor is divided into modular components including a base portion and separate adjustable blades, each with independent adjustment mechanisms. This segmentation allows each component to be optimized for its specific function while providing overall system versatility. The modular design enables adaptation to various surgical requirements without requiring complete redesign of the entire device.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The retractor incorporates multiple adjustment mechanisms that allow dynamic reconfiguration of blade positions, angles, and spacing during the surgical procedure. This dynamic capability provides high adaptability to different surgical scenarios while maintaining relatively simple individual components, balancing versatility with device complexity.

Inventive Principle:

Principle #15Dynamics

3Object-affected harmful factors

If standard retractor designs are used, then manufacturing simplicity is maintained, but minimization of tissue trauma is compromised

Engineering Contradiction:

Improvetissue traumaVSAvoidease of manufacturing retractor

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The retractor blades feature varying thickness profiles and localized geometric features optimized for specific functional requirements. The blades are thicker at certain regions for structural strength while thinner at other regions to minimize tissue displacement and trauma. This localized optimization reduces tissue trauma while maintaining manufacturability through standard machining processes.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The retractor design incorporates variable parameters such as blade thickness, curvature, and angle that can be adjusted based on specific surgical requirements. These parameter variations allow optimization of tissue interaction characteristics while maintaining compatibility with conventional manufacturing methods, balancing tissue trauma minimization with ease of manufacture.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12369897B2Surgical retractors and methods of using the same

Publication Date: 2025.07.29 ALPHATEC SPINE INC

AI summary

Disclosed herein are surgical retractors and methods of using such surgical retractors where the surgical retractors include a base portion and two retractor blades. The base portion has (a) two extensions, each extension having a receiving area, and (b) and one or more engagement portions. Each retractor blade includes both a blade portion with proximal and distal ends and an arm portion extending from the proximal end of the blade portion. Each arm portion is received by a respective receiving area.