Arthroscopic Drill Guide and Elastomeric Cable for Glenoid Augmentation
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Solution Overview
Problem
Conventional surgical techniques for shoulder instability, such as arthroscopic glenoid bone augmentation, face challenges including complex procedures, high complication rates, and inadequate control of implant placement, leading to issues like graft migration and glenohumeral arthritis.
Innovation Solution
The development of a drill guide and tensioner and crimping device system for arthroscopic bone augmentation, which includes a drill guide with offset slots for precise pilot hole placement and a surgical elastomeric cable with a tensioner and crimping mechanism to apply compressive force and secure the graft to the glenoid, facilitating easier and more stable bone augmentation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional surgical techniques (open repair, bone transfer) are used for shoulder instability, then structural stability is achieved, but surgical complexity and complication rates increase
Solution Approach 1:
The drill guide is divided into separate functional components: a guide body, a tab for positioning, and a drill guide opening for hole creation. This segmentation allows each component to perform its specific function efficiently, reducing overall surgical complexity while maintaining reliability
Solution Approach 2:
The drill guide acts as an intermediary tool between the surgeon and the bone drilling process. It provides precise guidance and control, simplifying the surgical procedure while ensuring accurate pilot hole placement for reliable graft fixation
2Strength
If arthroscopic glenoid bone augmentation with screws is used, then fixation strength is improved, but ease of insertion during surgery deteriorates
Solution Approach 1:
The difficult-to-insert screw component is extracted and replaced with a suture-based fixation system. The suture can be easily passed through the graft and secured with a button, providing sufficient fixation strength while dramatically improving ease of insertion during the arthroscopic procedure
3Ease of operation
If sutures or buttons are used for glenoid implant fixation, then ease of insertion is improved, but reliability deteriorates due to fracture risk from lack of force dispersion
Solution Approach 1:
The button fixture is designed with a specific local geometry that distributes forces across multiple contact points with the bone. This local quality enhancement provides both ease of insertion and reliable fracture resistance by preventing stress concentration at any single point
4Ease of operation
If sutures or buttons without spike or peg are used for glenoid fixation, then ease of operation is improved, but control of implant deteriorates
Solution Approach 1:
The drill guide serves as an intermediary positioning tool that provides precise control over implant placement. It includes a tab that can be positioned against the bone surface and a drill guide opening that ensures accurate hole placement, thereby maintaining control while preserving ease of operation
5Reliability
If conventional surgical techniques are used, then treatment effectiveness is achieved, but post-operative complications and recurrent instability increase
Solution Approach 1:
The conventional mechanical fixation systems (screws, open repairs) are replaced with a minimally invasive arthroscopic suture-based system. This substitution reduces tissue trauma and surgical morbidity while maintaining treatment effectiveness and reducing post-operative complications through smaller incisions and less soft tissue disruption
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
This system reduces surgical complexity, minimizes complications, and effectively restores the natural anatomy and biomechanics of the joint by providing precise pilot hole alignment and secure graft fixation, thereby improving patient outcomes.
Implementation Method 1
a surgical cable, such as an elastomeric ribbon, adapted for applying a compressive force across the bone and the graft
Data Source
AI summary
Arthroscopic devices adapted for minimally invasive procedures, such as bone augmentations and reconstructive surgery, are provided. The arthroscopic devices include a drill guide adapted for efficiently and accurately positioning pilot holes and surgical instrumentation relative to the bone; a surgical cable, such as an elastomeric surgical cable, adapted for applying a compressive force across the bone fragments after the surgical repair to promote healing; and a tensioner and crimping device for applying tension to the surgical cable and securing the surgical cable in place. A surgical procedure is also disclosed where a cerclage is applied arthroscopically by passing a member such as an elastomeric ribbon through the glenoid and a bone graft, where the member is tensioned and fixed into place to hold the bone graft in firm contact with the glenoid to facilitate healing.