Adjustable Surgical Retractor Blade Mechanism
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Solution Overview
Problem
Current surgical retractors for accessing spinal surgical sites are inadequate in providing effective exposure and visualization, often leading to tissue damage and incomplete access due to fixed blade orientations and inability to adjust to anatomical variations.
Innovation Solution
A surgical retractor system with adjustable and extendable blades that mimic anatomical structures, allowing for axial translation and locking in various orientations to prevent tissue creep and damage, facilitating better access and visualization during spinal surgeries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed blade orientation is used in traditional retractors, then device simplicity is maintained, but adaptability to anatomical variations deteriorates
Solution Approach 1:
The retractor blade is made dynamically adjustable through a rotatable shaft mechanism that allows the blade to be positioned at different orientations and locked in place. This dynamic capability enables the retractor to adapt to various anatomical configurations while maintaining a relatively simple overall device structure.
Solution Approach 2:
The retractor is divided into separable components including a base, a rotatable shaft, and an adjustable blade. This segmentation allows each component to be optimized independently and facilitates easy adjustment of the blade orientation to match different anatomical requirements without complicating the entire device.
2Productivity
If non-adjustable blades are used, then manufacturing simplicity is maintained, but surgical efficacy deteriorates
Solution Approach 1:
The adjustable blade mechanism allows the retractor to be customized for different surgical needs without requiring multiple specialized devices. The rotation and locking mechanism adds minimal manufacturing complexity while significantly improving surgical efficacy by enabling precise positioning for various anatomical configurations.
3Object-affected harmful factors
If fixed orientation retractors are used, then device simplicity is maintained, but tissue damage increases due to inability to prevent tissue creep
Solution Approach 1:
The adjustable and lockable blade orientation allows surgeons to position the blade optimally to prevent tissue creep and distribute pressure evenly. This dynamic adjustment capability reduces tissue damage by enabling customization of the retractor's interaction with anatomical structures, outweighing the moderate increase in device complexity.
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 retractor system provides improved access and reduced tissue damage by allowing adjustable and extendable blades to accommodate anatomical variations, enhancing exposure and visualization during spinal surgeries, thus improving surgical efficacy and safety.
Implementation Method 1
A pin is connected with the groove such that rotation of the shaft causes axial translation of the blade relative to the first extension between a first orientation and a second orientation
Data Source
AI summary
A retractor includes a first wall extending from the base. The first wall has a longitudinal axis and extends between a first end and a second end. The first wall includes at least a portion of a longitudinal cavity. A rotatable shaft includes an outer surface that defines a groove. At least a portion of the shaft is disposed in the longitudinal cavity. A blade is disposed for movement along the longitudinal cavity. A post is connected with the blade and is disposed with the groove such that rotation of the shaft causes axial translation of the blade relative to the first wall between a first orientation and a second orientation. Methods of use are disclosed.