Auger-Based Bone Harvesting and Delivery Device
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Solution Overview
Problem
Current bone grafting technologies face challenges in precision, control, and efficiency during both tissue harvesting and material delivery, particularly in Minimally Invasive Surgery (MIS) settings, where existing devices often require high force, result in tissue damage, and have limited capacity and quality of extracted/delivered materials.
Innovation Solution
An auger-based device and method utilizing a cannula with an integrated auger and flighting design that allows for precise and controlled bone tissue harvesting and delivery, enabling greater collection and delivery capacity with reduced force, improved tissue quality, and easier conversion between harvesting and delivery modes by reversing the auger's rotational direction or swapping auger designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional bone grafting devices are used, then bone tissue can be harvested and delivered, but precision and control are limited
Solution Approach 1:
The device is divided into functionally independent components: a harvesting auger assembly with cutting tip for tissue collection, a delivery auger assembly with flighting for material conveyance, and a cannula for guidance. This segmentation allows each component to be optimized for its specific function, improving overall precision while maintaining manageable complexity through modular design.
Solution Approach 2:
The device integrates both harvesting and delivery functions into a single system that can operate in both modes. The auger mechanism can be configured to either collect bone tissue or deliver graft material, reducing the need for separate tools and improving precision by eliminating the need to switch between different device systems.
2Object-affected harmful factors
If traditional harvesting methods are used, then bone tissue can be extracted, but force exertion on the patient is high and tissue quality is compromised
Solution Approach 1:
The device replaces high-force mechanical extraction methods with a controlled auger rotation system that gently collects and conveys bone tissue. The auger's螺旋 flighting structure allows gradual material accumulation and transport, reducing sudden force impacts on the patient's tissue while maintaining effective collection capacity.
Solution Approach 2:
The device controls the rotational speed and direction of the auger to optimize tissue collection. By adjusting rotation parameters, the system can gently gather bone tissue without applying excessive force, thereby improving tissue quality while maintaining adequate collection capacity through controlled parameter variation.
3Manufacturing precision
If traditional delivery methods are used, then graft material can be transported, but precision and control are limited and material quality is compromised
Solution Approach 1:
The device replaces force-driven delivery mechanisms with a rotation-based auger conveyance system. The auger's rotational motion gently transports graft material through the cannula, eliminating the need for high-force pushing or compression that would compromise material quality while achieving precise delivery control through rotational parameter adjustment.
Solution Approach 2:
The delivery system controls the rotation direction and speed of the auger to precisely regulate material flow. By adjusting these parameters, the system achieves accurate delivery positioning and controlled material transport without applying excessive force to the graft, thereby maintaining material integrity and delivery precision.
4Quantity of substance
If traditional devices are used, then bone grafting can be performed, but capacity is limited and conversion between harvesting and delivery modes is difficult
Solution Approach 1:
The device is designed as a universal system where the same basic auger mechanism can perform both harvesting and delivery functions. By simply changing the auger configuration (adding or removing the cutting tip) and adjusting rotation direction, the system can switch between modes without requiring complete tool replacement, thereby maintaining high collection capacity while improving operational ease.
Solution Approach 2:
The device incorporates dynamic reconfigurability through detachable auger components and adjustable rotation mechanisms. This allows the system to adapt between harvesting and delivery modes by dynamically changing the auger's configuration and rotation parameters, making the conversion process simple and maintaining high collection capacity through the same physical platform.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The auger-based device enhances precision and control in bone grafting procedures, allowing for higher quality tissue extraction and delivery with reduced trauma to the patient, increased capacity, and improved handling of custom graft mixtures, while minimizing tissue crushing and operational force.
Implementation Method 1
an auger-based design allows users to harvest bone tissue using an MIS technique
Implementation Method 2
rotating, in a first direction, a cutting tip against a bone target to collect bone tissue
Data Source
AI summary
Auger-based bone harvesting and delivery may be provided by a surgical device comprising: a cannula having first and second openings disposed on respective first and second ends; an auger, disposed within the cannula, including a flighting arranged around an auger shaft (aligned concentrically to the cannula); and a holding area in communication with the first opening. Harvesting may be performed by rotating, a cutting tip against a bone to collect tissue; and conveying the tissue to a holding area via the auger (that is co-rotated with the cutting tip). Delivery may be performed by inserting the first opening of the cannula into a delivery site; providing a graft material in a holding area in communication with a second opening of the cannula into contact with the auger; rotating the auger to convey the graft material to the delivery site via the auger and cannula.