Surgical Guide-Hub Drill for Perpendicular Skull Entry
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Solution Overview
Problem
Current surgical procedures for placing an external ventricular drain (EVD) in the brain are prone to catheter misplacement and drill plunge complications due to the lack of alignment guides, automatic plunge protection, and excessive complexity in existing hand-crank drills, leading to increased complications and costs.
Innovation Solution
A guided drilling system with a guide-hub and plunge protection mechanism that maintains perpendicular drilling and catheter insertion trajectories, featuring an automatic drill bit retraction system, integrated scalp retraction, hemostasis, augmented reality tracking, and positioning sensors to enhance precision and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hand-crank drill is used for skull penetration, then the surgeon has manual control over drilling, but the procedure is prone to drill plunge complications and catheter misplacement due to lack of automatic protection and alignment guidance
Solution Approach 1:
The drill system performs self-protection through the harness mechanism that automatically detects skull penetration and prevents drill plunge without requiring continuous surgeon intervention. The system serves itself by monitoring drilling depth and activating protection when penetration is detected.
Solution Approach 2:
The patent replaces purely manual mechanical control with an automated mechanical detection and protection system. The harness with detection mechanisms substitutes for constant surgeon monitoring and manual depth control, providing automatic plunge protection while maintaining mechanical drilling operation.
2Manufacturing precision
If alignment guides and automatic plunge protection are added to improve precision, then catheter misplacement and drill plunge complications are reduced, but device complexity increases
Solution Approach 1:
The patent combines multiple functions into integrated components: the guide-hub merges alignment guidance, drill support, and plunge protection functions into a single structure. The harness integrates detection mechanisms and protection functions together, reducing the number of separate components while maintaining comprehensive functionality.
Solution Approach 2:
The guide-hub serves multiple purposes simultaneously: it provides alignment guidance for precise drilling, supports the drill during operation, and works with the harness to provide automatic plunge protection. This multi-functionality reduces the need for separate dedicated components for each function.
3Productivity
If the drill bit is allowed to penetrate freely to place the catheter, then the procedure is simpler, but drill plunge into the brain causes severe injury or death
Solution Approach 1:
The harness is pre-configured to provide counter-action before dangerous plunge can occur. The detection mechanisms are positioned to sense skull penetration in advance, and the protection mechanism is pre-loaded to activate immediately upon detection, preventing the harmful plunge action before it can cause injury.
Solution Approach 2:
The system performs preliminary detection of skull penetration status before allowing further drilling. The harness monitors the drilling process continuously and activates protection in advance of potential dangerous plunge, ensuring safety measures are in place before harm can occur.
Data Source
AI summary
A drilling system includes a guide-hub that includes contact feet configured to be placed against a drilling surface to maintain a fixed angle with the drilling surface. A drilling insert includes a drill bit and a harness. The drilling insert is configured to be inserted into the guide-hub and the harness is configured to detect when the drill bit punctures the drilling surface and automatically prevent further drilling.