Clip-Type Cranial Flap Anchoring Device for Stable Closure
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Solution Overview
Problem
Current methods for closing and anchoring cranial flaps during neurosurgery face issues such as poor stability, high cost, need for special instruments, and risk of brain damage, with limited stability and cumbersome reoperation procedures.
Innovation Solution
A clip-type cranial flap closing and anchoring device comprising two parts with a U-section and L-section design, respectively, that securely fasten to the skull using a screw, preventing slippage and allowing for easy re-opening, made from medical-grade materials like titanium, and allowing outward movement in case of brain edema.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If absorbable plastic buttons are used to attach the cranial flap, then the flap can be kept in position, but the buttons are thick and can be felt under skin, sometimes may look ugly if applied on exposed surface, and have poor stability and grip
Solution Approach 1:
The device is divided into two separate parts: a first part that contacts the top surface of the flap and a second part that contacts the bottom surface, with a gap between them to accommodate the flap. This segmentation allows each part to be thin and cosmetically acceptable while together providing stable anchoring.
Solution Approach 2:
The cranial flap is nested within the gap between the first and second parts of the device, with the first part positioned above the flap and the second part positioned below, creating a nested structure that secures the flap while maintaining a thin profile.
2Reliability
If absorbable plastic buttons with thread are used to attach the flap, then the flap can be kept in position, but the application is time consuming and the buttons are expensive
Solution Approach 1:
The invention eliminates the need for separate threads and multiple components by integrating the anchoring function directly into the clip structure. The clip itself provides the securing mechanism through its compression action, removing the time-consuming step of threading and knotting.
Solution Approach 2:
The first and second parts of the clip work together as an integrated unit to secure the flap, combining the functions of positioning and anchoring in a single device that is applied in one motion, reducing application time.
3Reliability
If metal/titanium discs with serrated wire are used to anchor the flap, then satisfactory anchorage is provided, but special and expensive instruments are required, and reoperation is cumbersome and time consuming
Solution Approach 1:
The clip device is self-contained and can be applied and removed using standard surgical instruments without requiring special tools. The compression and locking mechanisms are built into the device itself, eliminating the need for external instrumentation during application and reoperation.
4Reliability
If the cranial flap is securely anchored to prevent movement, then brain protection is improved, but the device should allow outward movement in case of brain edema
Solution Approach 1:
The clip device provides dynamic anchoring that adapts to changing conditions. The compression mechanism can accommodate slight movements and expansions of the brain tissue while maintaining secure attachment, allowing for brain edema without complete rigidity.
Data Source
AI summary
Provided herein is a clip type cranial flap closing and anchoring device having a single structure including first part in contact with top surface of the flap and second part in contact with bottom surface of said flap maintaining a gap therebetween to accommodate the flap, wherein the first part is fixedly secured to third part for fastening the device to the skull.