Surgical File Guide Shield Dimple for Blade Alignment
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Solution Overview
Problem
Existing surgical file instruments often wobble during use, compromising precision in bone removal and potentially injuring surrounding anatomy due to lack of a stable reciprocating motion mechanism.
Innovation Solution
A surgical file instrument with a unique configuration featuring a dimple on the guide/shield in sliding relationship with the file blade, combined with a motion converter using a planetary gear system, cam, and thrust control, ensures the blade remains centered and in-line during reciprocation, utilizing an elongated outer tube casing and a solid insert with an 'infinity symbol' aperture for precise bone removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional surgical file instrument is used, then the file can be inserted into tight anatomical spaces, but the file blade wobbles and vacillates from the center line during operation
Solution Approach 1:
A guide/shield member is introduced as an intermediary component between the file blade and the surrounding anatomy. This guide/shield has a central channel that receives the file blade and lateral surfaces that contact and guide the blade, ensuring it remains centered and prevents wobbling during reciprocating motion.
Solution Approach 2:
The surgical file instrument is divided into separate functional components: the file blade for cutting, the guide/shield member for centering and protection, and the handle for actuation. This segmentation allows each component to be optimized independently - the file blade can be thin for accessing tight spaces while the guide/shield provides the necessary guidance and stability.
2Length of moving object
If the file blade is made thin to fit into small spaces, then access to tight areas is improved, but the file becomes more prone to wobbling and losing alignment
Solution Approach 1:
The guide/shield member serves as a mediator that provides lateral support to the thin file blade. The guide/shield's central channel and lateral surfaces prevent the thin blade from wobbling or deviating from the center line, allowing the blade to remain thin for accessing tight spaces while maintaining stability during operation.
3Object-affected harmful factors
If a shield is added to protect surrounding anatomy, then safety is improved, but the device complexity increases
Solution Approach 1:
The guide/shield member is designed to perform multiple functions simultaneously: it protects surrounding anatomy from inadvertent injury, centers and guides the file blade to prevent wobbling, and provides a structural framework for the overall instrument. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity.
4Ease of operation
If a complex transmission mechanism is used to convert rotary motion to reciprocating motion, then precise control is achieved, but the manufacturing cost and complexity increase
Solution Approach 1:
The patent replaces complex mechanical transmission mechanisms with a simpler direct reciprocating motion system. The file blade is directly actuated to move back and forth along the center line of the guide/shield, eliminating the need for torus transmission devices, variable thickness cams, or other complex rotary-to-reciprocating conversion mechanisms while maintaining precise control.
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 solution maintains the file's alignment and stability, enhancing precision in surgical procedures by preventing wobbling and ensuring safe operation in tight anatomical spaces, while being simpler and less costly to manufacture.
Implementation Method 1
a surgical file instrument that includes a motion converter having a planetary gear system
Implementation Method 2
a surgical file instrument that includes a motion converter having a planetary gear system, cam and thrust control
Data Source
AI summary
A surgical file instrument including a surgical file assembly having an elongated tubular member with a guide/shield supporting the blade of the surgical file and being formed on the distal end thereof, the guide/shield portion being generally planar shaped and having an elongated longitudinally extending dimple defining a rail for guiding said blade and keeping it central and preventing wobbling. The side edges of said guide/shield extend upwardly and bear against the underside of the blade for supporting the same.