Hollow Pin Assembly for Percutaneous Bone Stabilization and Drug Delivery
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Solution Overview
Problem
Current surgical methods for treating bone metastases and osteoporotic fractures are invasive, risky, and ineffective in stabilizing weakened bones without causing complications, especially for advanced cancer patients and the elderly, as they require extensive surgery and internal metal fixators that easily loosen due to weakened bones.
Innovation Solution
A pin assembly with a hollow pin featuring multiple side holes and a head that allows for percutaneous insertion into bones without skin or muscle incision, enabling the injection of medications and bone cement through the pin to reinforce and stabilize the bone, while the pin is fixed in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If percutaneous pin insertion is used, then surgical invasiveness is reduced, but bone stabilization effectiveness deteriorates
Solution Approach 1:
The pin combines two separate functions into one device: it simultaneously provides internal fixation (bone stabilization) and serves as a drug delivery system. The pin includes both structural support elements and hollow channels for injecting bone cement and medications, eliminating the need for separate procedures.
Solution Approach 2:
The pin assembly serves multiple functions: mechanical stabilization of fractured bones, delivery of bone cement for reinforcement, and administration of chemotherapeutic agents or osteogenic medications. This multi-functional design addresses multiple treatment needs through a single percutaneous procedure.
2Reliability
If internal metal fixators are used, then bone fixation is achieved, but loosening occurs due to weakened bones
Solution Approach 1:
The procedure delivers bone cement and osteogenic medications into the bone tissue before and during the insertion of the pin. This preliminary strengthening of the bone creates a more stable environment that prevents subsequent loosening of the fixation device.
Solution Approach 2:
The treatment combines multiple materials with complementary properties: metal pin for mechanical strength, bone cement for immediate structural reinforcement, and osteogenic medications for long-term bone regeneration. This composite approach creates a synergistic effect that enhances overall fixation stability.
3Reliability
If extensive surgery is performed, then bone treatment is thorough, but surgical risks and complications increase
Solution Approach 1:
The invention extracts the essential treatment functions from the context of extensive open surgery and delivers them through a percutaneous approach. The pin system provides bone stabilization, drug delivery, and bone cement injection without requiring large incisions, muscle cutting, or extensive surgical exposure.
4Reliability
If multiple separate procedures are used for fixation and medication delivery, then treatment completeness is achieved, but procedural complexity increases
Solution Approach 1:
The pin assembly integrates multiple treatment modalities into a single device and procedure. The hollow pin structure allows simultaneous delivery of bone cement through one channel and chemotherapeutic agents or osteogenic medications through other channels, while the pin itself provides mechanical fixation. This eliminates the need for separate surgical procedures.
Data Source
AI summary
A pin assembly for operation includes a hollow pin for operation having a plurality of side holes defined through an outer surface thereof and a head which is closed or open due to the presence of a through-hole; a hollow support having a pin fastening part formed therein in the shape of a groove to fasten one end of the pin for operation, and being open at both ends thereof, and a hollow injector for insertion into an insertion hole formed in the support, wherein the hollow pin for operation is fastened to the pin fastening part of the support, and by applying external force to one end of the support, the hollow pin for operation is inserted into a bone.