Self-Retaining Neural Retraction Clip with Spring-Loaded Segmented Legs
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Solution Overview
Problem
Current spinal fusion procedures face challenges with manual neural tissue retraction, which increases the risk of neural damage due to reduced visibility and requires frequent adjustments, leading to potential dural tears and mechanical instability during surgery.
Innovation Solution
A self-retaining neural retraction clip with spring-like compression and expansion, featuring spiked feet that pierce vertebral bodies for secure positioning, and adjustable retraction mechanisms to minimize manual intervention and enhance surgical visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual neural tissue retraction is performed with hand-held dural retractors, then neural retraction can be achieved, but visibility of neural retraction is reduced and risk of neural damage increases
Solution Approach 1:
The retractor system is self-retaining with interlocked legs that automatically maintain retraction without requiring continuous manual adjustment by the operative assistant. The spring-loaded mechanism with teeth that engage the dura mater provides automatic self-adjustment and maintenance of retraction position.
Solution Approach 2:
The retractor is divided into separate components including first and second legs with feet, a compression member, and interlocking mechanisms. This segmentation allows the retractor to be inserted in a compressed state and then expanded to engage the neural tissue, improving visibility and control.
2Reliability
If frequent adjustment of the retractor is performed to ensure proper positioning, then neural retraction can be maintained, but patient risk increases due to excessive retraction or inadvertent release
Solution Approach 1:
The interlocked leg mechanism with spring-loaded feet automatically maintains proper retraction positioning without requiring frequent manual adjustments. The self-retaining design prevents inadvertent release while avoiding excessive retraction forces through controlled mechanical engagement.
Solution Approach 2:
The spring-loaded mechanism provides gradual, controlled engagement of the neural tissue rather than abrupt retraction. The elastic compression member cushions the engagement process, preventing sudden excessive forces that could cause dural tears or neural damage.
3Reliability
If hand-held dural retractors are manually placed and secured, then neural retraction can be achieved, but operative site crowding increases and visibility to disc space is minimized
Solution Approach 1:
The retractor components are inserted separately through the disc space and then expanded within the neural foramen. This segmented approach allows insertion without occupying significant surgical site space, maintaining visibility to the disc space while achieving effective neural retraction.
Solution Approach 2:
The retractor transitions from a compressed linear configuration during insertion to an expanded three-dimensional configuration during operation. This dimensional change allows the retractor to achieve effective neural retraction in the lateral dimension while minimizing occupation of the anterior-posterior surgical site space.
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 self-retaining neural retraction clip reduces the risk of neural damage by maintaining consistent and stable dural retraction, improving surgical access and visibility, and minimizing the need for frequent adjustments during spinal surgery.
Implementation Method 1
a curved intermediate section connecting the inner portions of the first and second legs to provide (typically, spring-like) compression and expansion
Data Source
AI summary
A self-retaining neural retraction clip, preferably having controlled retraction level and an off-set retraction means. This device can reduce operative site clutter to enhance disc access while providing consistent and stable dural retraction.