Double-Bladed Cartilage Cutter With Adjustable Guide
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Solution Overview
Problem
Current methods for cutting costal cartilage in medical procedures lack precision and consistency, leading to suboptimal results in reconstructive surgeries, particularly in rhinoplasty, due to the reliance on manual scalpel techniques and existing mechanical devices that fail to produce uniformly thick slices.
Innovation Solution
A double-bladed cutting device with an adjustable guide and compression mechanism that allows for precise and uniform cutting of costal cartilage specimens, enabling the production of user-defined, uniformly thick sections from the central core of the rib, reducing skill and time requirements while enhancing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual scalpel techniques are used to cut costal cartilage, then the method is simple and requires minimal equipment, but the precision and uniformity of the cartilage slices are poor
Solution Approach 1:
The patent introduces a mechanical cutting device with parallel blades and spacers as an intermediary tool between the surgeon and the cartilage. This device mediates the cutting process by providing fixed spacing guides that ensure uniform thickness, eliminating the imprecision of direct manual scalpel work while maintaining surgical control.
Solution Approach 2:
The patent changes the critical parameter of slice thickness control from being operator-dependent to being device-defined through fixed spacers. By establishing a predetermined spacing parameter between parallel blades, the system achieves consistent uniformity across all cuts, transforming an variable manual process into a controlled mechanical one.
2Manufacturing precision
If existing mechanical cutting devices with parallel blades and spacers are used, then the cutting speed increases and simplicity is maintained, but the accuracy and precision of uniform thickness slices deteriorate
Solution Approach 1:
The patent employs a dynamic guillotine-style cutting mechanism where the blades move vertically through the cartilage rather than requiring the cartilage to be pushed through fixed blades. This dynamic approach allows for cleaner cuts with greater precision while maintaining rapid cutting speed, as the downward motion provides controlled force distribution across the cutting edge.
Solution Approach 2:
The cutting device is segmented into multiple functional components: parallel blades for cutting, spacers for thickness control, and a guillotine mechanism for actuation. This segmentation allows each component to be optimized independently - the blades for precision cutting, the spacers for accurate spacing, and the mechanism for rapid operation - achieving both high accuracy and productivity.
3Quantity of substance
If slices are obtained from peripheral regions of costal cartilage to provide abundant supply, then the quantity of cartilage grafts increases, but the risk of warping after graft placement increases
Solution Approach 1:
The patent applies preliminary action by using the precise mechanical cutting device to prepare cartilage slices with uniform thickness and balanced cross-sections before graft placement. This pre-processing ensures that the structural integrity and shape stability are established in advance, preventing warping issues that would otherwise require corrective measures after implantation.
Solution Approach 2:
The patent applies local quality by enabling selective harvesting from different regions of the costal cartilage with controlled precision. The uniform cutting mechanism allows surgeons to obtain balanced cross-sections from central core regions (which provide stability) or peripheral regions (which provide quantity), with the ability to mix approaches to achieve both abundance and shape reliability in the final graft set.
Data Source
AI summary
A double-bladed cutting device providing a practical method for obtaining costal cartilage specimens in both an operating room and research setting. The device reduces the skill and time required to fashion cartilage slices, while increasing the uniformity of the cut specimens. Furthermore, via an adjustable guide, slices can be obtained precisely from the central core of the rib. Although specimen lengths up to 4 cm are preferred, longer lengths can be attained without modification of the device. The cartilage specimen may be held in place within the device via means of compression or tension.