Interchangeable Retractor Blades for Tissue Encroachment
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Solution Overview
Problem
Existing soft tissue retractor systems face challenges with soft tissue encroachment between blades during expansion, limiting the surgical field of view and requiring auxiliary devices to increase blade width, which complicates procedures and prolongs cleaning and sterilization times.
Innovation Solution
A system with interchangeable retractor blades and shells that adjust curvature to expand the surgical area, featuring first and second blades with different radii of curvature to configure the shells into various viewing areas, reducing tissue encroachment and the need for auxiliary devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional robust retractor blades are used to split the psoas muscle and expand the retractor, then direct access to the intervertebral space is achieved, but soft tissue encroachment occurs between the opened blades
Solution Approach 1:
The retractor blades are designed with curved surfaces instead of flat surfaces, allowing them to conform to the natural anatomy of the psoas muscle and vertebral structures. This curvature enables the blades to split and retract tissue more effectively while maintaining wider spacing between adjacent blades, thereby reducing soft tissue encroachment in the surgical field.
Solution Approach 2:
The invention introduces auxiliary blades that extend perpendicular to the main blade plane, creating a three-dimensional retraction structure. This additional dimensional element provides lateral support and keeps soft tissue away from the surgical site without requiring excessive widening of the primary blades, thus reducing tissue encroachment while maintaining access.
2Object-affected harmful factors
If auxiliary devices are added to increase blade width and reduce tissue encroachment, then the surgical field of view is improved, but device complexity increases
Solution Approach 1:
The auxiliary blades are integrated directly into the retractor assembly as a unified structure, combining the primary retraction function with the auxiliary tissue-retracting function in a single device. This eliminates the need for separate auxiliary devices and simplifies the overall system while maintaining the ability to reduce soft tissue encroachment.
Solution Approach 2:
The retractor system is designed with blades that perform multiple functions: the primary blades provide main retraction and surgical access, while the integrated auxiliary blades simultaneously provide lateral tissue support and field-of-view management. This multi-functionality reduces the need for additional specialized devices.
3Object-affected harmful factors
If more auxiliary devices are used to improve surgical access, then tissue encroachment is reduced, but cleaning and sterilization time increases
Solution Approach 1:
By integrating the auxiliary blades into the main retractor assembly as a single unified device, the invention reduces the number of separate components that require individual cleaning and sterilization. The merged structure allows for streamlined processing while maintaining the tissue-retracting functionality.
Solution Approach 2:
The retractor blades are designed as modular, separable components that can be detached from the main assembly. This segmentation allows for efficient cleaning and sterilization, as individual blade components can be quickly processed separately rather than requiring the entire complex assembly to be sterilized as one unit.
Data Source
AI summary
A system for interchangeable retractor blades includes a shell, a first retractor blade, and a second retractor blade. The shell includes a rigid proximal end configured to attach to a surgical retractor and an opening, a distal closed end, and a pliable portion including a pocket in communication with the opening and extending along a length of the shell to the distal closed end. The first retractor blade includes a first geometry received through the opening into the pocket and that shapes the pliable portion to configure the shell in a first configuration. The second retractor blade includes a second geometry received through the opening into the pocket and that shapes the pliable portion to configure the shell in a second configuration.