Segmented Multi-Plate Surgical Retract
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Solution Overview
Problem
Conventional self-retaining retractors have limited spread or opening ability, restricting visibility and movement in surgical procedures due to their design, which can hinder the effectiveness of medical staff during operations.
Innovation Solution
The development of retractor assemblies with a multi-plate construction, C-shaped arms, and advanced locking mechanisms, including quick release and ratcheting locks, allowing for adjustable angles and increased maneuverability, enabling better visibility and access to the surgical field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If conventional self-retaining retractors are used, then the structure is simple, but the spread ability is limited and visibility is restricted
Solution Approach 1:
The retractor arm is divided into multiple segments connected by pivot joints, allowing each segment to move independently and increase the overall spread ability while maintaining structural simplicity
Solution Approach 2:
The retractor incorporates dynamic locking mechanisms that allow the arms to be adjusted to various angles and locked in place, providing both mobility during adjustment and stability during use, thereby improving visibility without requiring a complex fixed structure
2Length of moving object
If cross members are added to increase spread ability, then the opening ability improves, but the visibility and maneuverability are restricted
Solution Approach 1:
Instead of using rigid cross members, the retractor uses segmented arms with pivot joints that allow flexible positioning and better maneuverability while achieving the required spread ability
Solution Approach 2:
The retractor arms are configured to move in multiple dimensions through pivot joints, allowing adjustment in various planes to improve maneuverability and surgical access without requiring additional cross members that would obstruct the field
3Ease of operation
If the retractor arm is made lighter, then the ease of manipulation improves, but the strength may be compromised
Solution Approach 1:
The retractor arm uses varying thickness and density in different sections, with thicker portions at stress points and thinner portions elsewhere, optimizing the strength-to-weight ratio for easier manipulation while maintaining necessary strength
Solution Approach 2:
The retractor arm is constructed from composite materials or materials with optimized mechanical properties that provide high strength-to-weight ratio, enabling easy manipulation while maintaining structural integrity under surgical loads
4Strength
If multi-plate construction is used, then the strength increases and weight decreases, but the device complexity increases
Solution Approach 1:
Multiple plates are combined using standardized connection elements and pivot joints that simplify the assembly process, allowing the multi-plate construction to achieve high strength-to-weight ratio without proportionally increasing 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 improved retractor assemblies provide a wider range of motion, enhanced visibility, and easier manipulation, facilitating more effective surgical procedures by allowing for adjustable angles and secure locking mechanisms, thus improving surgical efficiency and access.
Implementation Method 1
a biasing element, such as a spring or the like, operably coupled to the quick release plate and configured to urge the quick release plate against the ratchet teeth
Implementation Method 2
a ratchet configured to receive the quick release plate, wherein the ratchet includes a series of ratchet teeth extending laterally therefrom
Data Source
AI summary
Retractor assemblies and methods of using them to retract tissue. A retractor assembly as described herein may include first and second arms pivotally coupled and each arm formed of a plurality of stacked and separated plates, spaced to define a gap therebetween, providing strength while affording a reduction in weight of the retractor assembly. The retractor assembly may also include a ratcheting locking mechanism.