Patella Cutting Guide Angled Bone Spur Harvest
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Solution Overview
Problem
Current methods for harvesting quadriceps tendons for ACL reconstruction face challenges such as limited graft size, significant post-operative pain, and complications with cadaver grafts, while existing surgical tools struggle to efficiently create a bone spur from the patella, leading to suboptimal outcomes like chronic knee pain and scarring.
Innovation Solution
A cutting guide device that facilitates the creation of a properly sized bone spur by guiding angled cuts on the patella, allowing for the harvesting of a larger and stronger quadriceps tendon graft with reduced post-operative pain and scarring, featuring a handle with a terminal portion having a flat side and upwardly sloping wall to direct a saw blade for precise cuts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a large incision is made to harvest quadriceps tendon, then a larger graft can be obtained, but a large post-operative scar is created
Solution Approach 1:
The incision is divided into two separate smaller incisions: one for introducing the cutting guide and another for harvesting the graft. This segmentation allows the surgeon to obtain a large quadriceps tendon graft while minimizing visible scarring, as the two small incisions are less noticeable than one large incision would be.
2Productivity
If existing surgical tools are used to create bone spur, then the procedure can be completed, but the cutting precision is insufficient leading to chronic knee pain
Solution Approach 1:
A cutting guide is introduced as an intermediary tool between the surgeon and the bone cutting process. The guide includes a reference surface that contacts the femur and a cutting surface that directs the oscillating bone cutter, ensuring precise and accurate creation of the bone spur while preventing chronic knee pain through proper anatomical alignment.
3Strength
If the quadriceps tendon is harvested, then a stronger graft is obtained, but the surgical complexity increases
Solution Approach 1:
The cutting guide serves as a simplified intermediary device that actually reduces surgical complexity despite the strength benefits of quadriceps tendon harvesting. The guide provides pre-configured reference surfaces and cutting angles, eliminating the need for complex measurements and calculations during surgery, thereby making the procedure more straightforward while enabling harvest of the stronger quadriceps tendon.
Data Source
AI summary
A guide operates in the creation of a bone spur to facilitate harvesting a quadriceps tendon and includes an end having a width equal to a desired graft width with a terminal slope equal to a cutting angle desired. In use, the guide may be initially positioned parallel to the femur to form guide cuts in the patella. The guide is then rotated ninety degrees to allow an angled cut at the guide cut. The guide is again rotated, this time one hundred eighty degrees and a second angled cut made on the other guide cut. A final lateral cut is made and the bone spur may be lifted from the patella.