Bendable Pin Assembly with Side Holes for Percutaneous Bone Fixation
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Solution Overview
Problem
Current surgical methods for treating bone metastasis and fractures, especially in cancer patients and osteoporotic individuals, require extensive incisions and procedures, leading to complications, prolonged recovery times, and interference with anticancer medication, while existing treatments for bone reinforcement are invasive and carry risks such as fracture nonunion and weakened limb activity.
Innovation Solution
A bendable pin assembly with multiple holes for percutaneous insertion, allowing for the injection of medication and bone cement directly into the bone without skin incision, using stainless steel or titanium-based materials, to reinforce weakened bones and promote bone regeneration, while minimizing complications and enabling immediate anticancer treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If extensive incision and traditional surgical treatment is performed, then bone reinforcement and fracture fixation can be achieved, but recovery time is prolonged and complications increase
Solution Approach 1:
The surgical procedure is segmented into percutaneous pin insertion followed by separate medication/bone cement injection through the pin holes, avoiding the need for extensive incision while maintaining treatment effectiveness. The pin structure itself is segmented with multiple holes to enable targeted delivery of treatment agents.
Solution Approach 2:
The pin assembly serves as an intermediary device that provides both mechanical support for bone fixation and a delivery conduit for medication and bone cement. This intermediary structure eliminates the need for separate incisions and accelerates recovery while ensuring reliable bone reinforcement.
2Reliability
If extensive incision and tumor curettage is performed, then cancer treatment can be conducted, but patient general condition deteriorates due to anesthesia and bleeding
Solution Approach 1:
The harmful elements of extensive incision, large-scale tissue exposure, and significant bleeding are extracted from the treatment procedure. The percutaneous pin insertion method retains the essential cancer treatment function through minimal skin penetration, eliminating the harmful side effects of traditional extensive surgery.
Solution Approach 2:
The pin assembly functions as a temporary, minimally invasive device that achieves cancer treatment objectives without the need for prolonged surgical intervention. The percutaneous approach allows for quick procedure completion and immediate transition to anticancer medication, reducing exposure to anesthesia and surgical complications.
3Reliability
If separate hole definition is performed after metal pin insertion, then bone regeneration material can be injected, but additional surgical steps and recovery time are required
Solution Approach 1:
The pin structure is merged with injection functionality by incorporating holes directly into the pin body. This allows bone regeneration material and anticancer medication to be delivered through the same pin insertion site, eliminating the need for separate hole-definition steps and reducing overall procedural complexity.
Solution Approach 2:
The pin assembly serves multiple functions simultaneously: mechanical fixation of bone fragments, delivery conduit for medication, and carrier for bone cement. This multi-functionality eliminates the need for separate devices and procedures, simplifying the overall treatment protocol while ensuring effective bone regeneration.
4Stability of the object's composition
If artificial joints and plates are used for fracture fixation, then bone stability can be achieved, but extensive incision and long recovery are required
Solution Approach 1:
The pin assembly serves as a temporary stabilization device that provides sufficient bone fixation during the critical healing period. The percutaneous insertion and minimal invasiveness allow for quick procedure completion and accelerated recovery, with the pin serving its stabilization function effectively without requiring extensive surgical exposure.
Solution Approach 2:
The approach changes the parameters of surgical intervention from extensive incision and large implant structures to minimal percutaneous access with slender pins. This parameter change maintains bone stability through precise pin placement and supplementary bone cement, while dramatically reducing recovery time and surgical trauma.
Data Source
Figure 1a~1b
Figure 1c~1d
Figure 1e~1f
AI summary
A pin assembly (100,100',100'') for operation includes a hollow pin (10a,10c,10f) for operation having a plurality of side holes (30) defined through a wall thereof, and a root part (20) which is closed, or open due to the presence of a through-hole (40); and a hollow support member (60) having a pin fastening part formed therein in the shape of a groove (65) to fasten one end of the pin for operation, and being open at both ends thereof, wherein the pin for operation is fastened to the pin fastening part of the support member, and by applying external force to one end of the support member, the pin for operation is inserted into a bone. Medication or cement can be injected through a pin.