Spinal Retractor Translating Arms Angulating Blades
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Solution Overview
Problem
Current spinal retractors lack flexibility and precision in blade positioning, leading to suboptimal surgical site access and stabilization during spinal surgeries.
Innovation Solution
A spinal retractor with adjustable and lockable translating arms and angulating blades, allowing for triangulated medial/lateral and cephalad/caudal tissue retraction, providing improved precision and stability in positioning and surgical site access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed angle retractor blade configurations are used, then the retractor structure is simple, but flexibility and precision in blade positioning are limited
Solution Approach 1:
The retractor blade configuration transitions from fixed angle to variable angle through the use of adjustable linkages and positioning mechanisms. The blade angle can be dynamically changed during surgery to accommodate different anatomical requirements, resolving the contradiction between structural simplicity and positioning flexibility.
Solution Approach 2:
The retractor system allows adjustment of blade angle parameters and positioning coordinates. By enabling continuous variation of these parameters rather than fixed discrete positions, the system achieves both reasonable structural complexity and high adaptability for different surgical scenarios.
2Adaptability or versatility
If variable angle retractor blade configurations are used, then flexibility in blade positioning is improved, but preciseness and stability in positioning are reduced
Solution Approach 1:
The retractor system incorporates pre-calibrated positioning mechanisms and guide structures that ensure accurate blade placement before surgery begins. Adjustment mechanisms are pre-configured with precise stop positions and alignment features, allowing flexible positioning while maintaining manufacturing precision through built-in reference systems.
Solution Approach 2:
The system includes positioning feedback mechanisms such as alignment indicators, reference marks, and mechanical stops that provide real-time information about blade position. This feedback allows the surgeon to achieve precise positioning while maintaining flexibility in adjusting blade angles and orientations during the procedure.
3Manufacturing precision
If adjustable and lockable translating arms with angulating blades are used, then precision and stability in positioning are enhanced, but device complexity increases
Solution Approach 1:
The retractor is divided into modular segments including translating arms, angulating blades, and adjustment mechanisms that can be independently positioned and locked. This segmentation allows each component to be optimized for its specific function while maintaining overall precision, and the modular nature helps manage device complexity through standardized interfaces and assembly.
Data Source
AI summary
A retractor assembly includes a base; a first side arm assembly coupled to a first side of the base and configured to translate relative to the base along a first direction; a second side arm assembly coupled to a second side of the base and configured to translate relative to the base along the first direction independent from the first side arm assembly; and a central arm assembly coupled to a center portion of the base and configured to translate relative to the base along a second direction different from the first direction.