Surgical Guide Instrument for Precise DBS Lead Countersinking
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Solution Overview
Problem
Existing deep brain stimulation (DBS) lead-locking mechanisms in neurosurgery result in a 'proud' profile on the scalp, leading to risks of erosion, infection, and poor cosmesis, while countersinking to address these issues adds surgical time and can cause divots or troughs if not properly matched.
Innovation Solution
A surgical guide instrument with a circular and ovular ring structure, featuring protrusions and a bar, is used to assist in countersinking a shelf for DBS lead locking mechanisms, ensuring precise drilling and a flush fit without additional surgical steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If countersinking is performed to reduce the proud profile of DBS anchoring devices, then the risk of erosion and infection is reduced and cosmesis is improved, but surgical time is increased
Solution Approach 1:
The guide instrument is prepared beforehand with the precise countersink geometry pre-defined by the circular ring and ovular ring. The surgeon simply needs to align and drill through the guide, rather than manually shaping the countersink during surgery. This preliminary preparation of the guide instrument eliminates the time-consuming manual countersinking process while ensuring consistent, infection-reducing results.
Solution Approach 2:
The guide instrument serves as an intermediary tool that translates the desired final countersink geometry into a simple drilling operation. The circular ring and ovular ring with bar create a precise template that guides the drill bit to produce the exact countersink shape needed, eliminating the need for complex manual shaping while ensuring the proud profile is properly reduced.
2Loss of time
If manual countersinking is performed without a guide instrument, then surgical time may be reduced, but divots and troughs in the scalp occur due to poor contour matching
Solution Approach 1:
The guide instrument acts as a physical template or intermediary that carries the precise countersink contour geometry. The circular ring and ovular ring with bar create a rigid framework that ensures the drill follows the exact desired contour, eliminating guesswork and ensuring perfect matching between the countersink and the anchoring device profile.
Solution Approach 2:
The complex manual skill of shaping a precise countersink contour is replaced by a simple mechanical drilling operation guided by the pre-fabricated guide instrument. Instead of requiring the surgeon to manually sculpt the bone to match the device profile, the guide instrument mechanically enforces the correct geometry through its circular and ovular ring structure.
3Manufacturing precision
If a complex guide instrument with multiple components is used, then precision of countersinking is improved, but device complexity increases
Solution Approach 1:
The guide instrument merges multiple functions into a single integrated device. The circular ring for alignment, the ovular ring for contour definition, and the bar for structural support are combined into one piece that performs all guiding functions simultaneously. This integration maintains precision while reducing the number of separate components the surgeon must handle.
Solution Approach 2:
The guide instrument is designed to be universally applicable to different DBS anchoring devices. The circular and ovular ring configuration can accommodate various base ring sizes and profiles, making the same guide instrument structure useful for multiple device types. This universality reduces the need for multiple specialized instruments, effectively reducing overall system complexity.
Data Source
AI summary
Systems, devices and methods are described for surgical guide instruments. For example, this disclosure describes surgical guide instruments for assisting in countersinking shelves for deep brain stimulation lead locking mechanisms.