Adjustable Surgical Retractor Frame for Stable Multi-Directional Exposure
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Solution Overview
Problem
Current surgical retractors, such as the Balfour and Bookwalter systems, face limitations in providing adequate exposure for large or obese patients, requiring conversion to another system, causing unintentional blade migration, and necessitating time-consuming repositioning, which is particularly problematic in emergency situations.
Innovation Solution
A surgical retractor assembly with adjustable frame segments and snap-fit connectors that allow for rapid assembly and adjustment without disrupting the sterile field, featuring snap-fit connectors and ratchet mechanisms to stabilize the frame, and rotatable blades with mechanical stops to prevent incorrect positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the standard Balfour retractor is used for large or obese patients, then the device is simple and easy to use, but it provides inadequate abdominal exposure and requires conversion to another system
Solution Approach 1:
The retractor frame is divided into multiple adjustable segments that can be independently positioned and locked. This segmentation allows the frame to be configured in different sizes and shapes to accommodate various patient body types and incision sizes, resolving the contradiction between ease of use and adaptability.
Solution Approach 2:
The retractor incorporates adjustable and reconfigurable components that allow dynamic modification of the frame structure during surgery. The ability to adjust blade positions, frame dimensions, and retraction forces enables the device to adapt to different patient sizes while maintaining simple operation through standardized adjustment mechanisms.
2Area of stationary object
If the Balfour retractor blades are extended for larger wounds, then the retraction coverage increases, but unintentional blade migration and rotation occur
Solution Approach 1:
The retractor blades are pre-loaded with spring mechanisms that apply continuous stabilizing force to maintain blade position against tissue pressure. This preliminary action prevents unintentional migration and rotation even when blades are extended for larger wounds, as the springs continuously counteract destabilizing forces.
Solution Approach 2:
The ratchet and pawl mechanisms provide mechanical feedback that prevents blade movement in the wrong direction while allowing controlled adjustment. This feedback system ensures blade position stability by automatically engaging locking mechanisms when blades are pushed by tissue pressure, preventing migration while maintaining extended coverage.
3Adaptability or versatility
If the Bookwalter retractor system is set up, then adequate exposure is provided, but time-consuming setup and repositioning is required
Solution Approach 1:
The retractor is divided into modular segments that can be independently assembled and positioned. This segmentation allows rapid setup by assembling only the necessary components for the specific surgical need, and enables quick repositioning by adjusting individual segments without disassembling the entire system, reducing time loss while maintaining adequate exposure.
Solution Approach 2:
The retractor incorporates quick-adjust mechanisms with ratchet locks that allow dynamic repositioning during surgery without complete disassembly. These mechanisms enable surgical team to rapidly adjust blade positions and frame configuration to maintain adequate exposure as surgery progresses, significantly reducing repositioning time compared to fixed systems.
4Adaptability or versatility
If additional retractor blades are attached to the Balfour retractor, then retraction in additional directions is achieved, but the design limitations prevent adequate exposure
Solution Approach 1:
The retractor frame is designed with universal attachment points and standardized mounting interfaces that allow multiple blade assemblies to be attached at various positions and orientations. This multi-functionality enables retraction in multiple directions simultaneously while maintaining a relatively simple base design, as the same frame structure supports various blade configurations.
Solution Approach 2:
The retraction system is segmented into independent blade assemblies that can be attached to different locations on the frame. Each blade can be independently positioned and adjusted, allowing complex multi-directional retraction patterns to be achieved by combining simple modular components rather than requiring a complex integrated design.
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 assembly provides enhanced exposure for various patient sizes, minimizes blade migration, and allows for quick setup, maintaining sterility and reducing operational interruptions.
Implementation Method 1
a first connector configured for coupling to a first end section of the first frame segment and a second connector configured for coupling to a second end section of the first frame segment; wherein each of the pair of connectors includes a channel configured for receiving an end section of the second frame segment when the end section and the channel are aligned about in parallel with each other and vertically overlaid
Data Source
AI summary
A surgical retractor assembly and related attachments are provided to assist in surgical procedures. The surgical retractor provides for increased flexibility and ease of assembly. The surgical retractor may, for example, comprise two frame segments configured so that they may be coupled together using a connector that allows one frame segment to be vertically positioned above a second frame segment and lowered onto the second frame segment so that a top surface of the second frame segment is received within a connector channel. The frame segments may thus be coupled together to form an adjustable frame.