Surgical Rongeur Interchangeable Amorphous Metal Tip
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Solution Overview
Problem
Conventional Kerrison rongeur devices require frequent sharpening and sterilization, leading to increased costs and reduced precision due to the need for multiple devices and extensive maintenance cycles, which can compromise surgical outcomes.
Innovation Solution
A surgical cutting apparatus with an interchangeable, detachable tip made from amorphous metal that allows for easy replacement and sharpening, reducing the need for multiple reusable devices and simplifying the sterilization process, while maintaining sharpness and strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple reusable rongeur devices are used to maintain sharpness, then cutting precision is improved, but device complexity and sterilization costs increase
Solution Approach 1:
The rongeur device is divided into two segments: a reusable handle and a disposable tip containing the blade. This segmentation allows the critical cutting component (blade) to be replaced independently, maintaining sharpness without requiring multiple complete devices. The handle can be reused while only the tip needs replacement, reducing the number of devices needed from multiple complete rongeurs to one handle with multiple interchangeable tips.
Solution Approach 2:
The patent implements a disposable tip design where the blade and footplate are contained in a single-use or limited-use tip that is discarded after a certain number of sterilization cycles or when dullness occurs. This eliminates the need to repeatedly sterilize and maintain multiple expensive reusable devices, while ensuring consistent cutting precision through factory-sharp disposable tips.
2Reliability
If reusable devices are extensively sterilized, then hygiene is improved, but maintenance costs and time increase
Solution Approach 1:
The disposable tip is designed to be sterilized a limited number of times (e.g., 3-5 cycles) and then discarded, rather than requiring indefinite reuse. This reduces the cumulative sterilization time and costs compared to repeatedly sterilizing multiple reusable devices, while maintaining appropriate hygiene standards for the procedure's duration.
Solution Approach 2:
The system allows for the discarding of tips after limited use and sterilization cycles, recovering the expensive handle for continued use. This approach optimizes the balance between sterility requirements and resource utilization, avoiding the excessive sterilization cycles that would be required if complete devices were reused extensively.
3Loss of substance
If blades are extended usage before sharpening, then cost is reduced, but cutting precision deteriorates
Solution Approach 1:
The disposable tip contains a blade that is factory-sharpened to precise specifications and is designed for limited use (typically one procedure or a few sterilization cycles). Rather than extending usage of a single blade until it becomes dull and expensive to sharpen, the system replaces the entire tip when sharpness deteriorates, ensuring consistent cutting precision while optimizing cost through controlled disposal rather than expensive professional sharpening services.
4Manufacturing precision
If multiple rongeur devices are maintained, then blade sharpness is preserved, but expense increases
Solution Approach 1:
By segmenting the device into reusable handle and disposable tip, the system reduces the total cost compared to maintaining multiple complete reusable rongeur devices. The expensive handle is shared across multiple procedures, while only the cheaper tips are replaced, achieving blade sharpness preservation at lower overall cost.
Solution Approach 2:
The disposable tip provides a cost-effective alternative to maintaining multiple expensive reusable devices. Each tip is manufactured with a sharp blade at a lower cost than a complete reusable device, and the ability to replace rather than sharpen eliminates expensive professional sharpening services, reducing overall expenditure while maintaining precision.
Data Source
AI summary
A surgical rongeur device has an interchangeable, locking tip at a cutting end for engageable replacement with a variety of cutting tips for facilitating sterilization and blade changes. A detachable linkage between a handle portion and an interchangeable cutting tip (tip) provides a strong connection for actuation by the handle end but allowing for tip replacement via slidable, lateral displacement of the tip. The tip includes a blade and footplate formed from an amorphous metal for longevity and strength advantages. A handle provides a lever to actuate the tip from slidable communication via the detachable linkage. An interlocking member extends longitudinally from the handle into an internal slot on the tip for locking the tip by preventing lateral movement out of alignment with the handle. The aligned tip is responsive to actuation from the handle via a rail for disposing the blade longitudinally against the footplate.