Prosthetic Device with Antibiotic-Eluting Beads
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current prosthetic devices implanted in the human body are prone to infections, with one-stage treatment methods showing a higher risk of reinfection due to inadequate antibiotic delivery, as existing antibiotic-loaded gels are ineffective against bacteria within the bone or joint site.
Innovation Solution
A prosthetic device with a structure featuring a tubular wall, inner cavity, and strategically placed holes or ports to house a filler material that absorbs and elutes antibiotics, ensuring prolonged exposure and effective delivery of antibiotics to the implant site, thereby preventing or treating infections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If antibiotic-loaded gels are applied on the outer surface of a prosthesis, then bacteria present in the outside environment are prevented from settling on the prosthesis, but the gels are ineffective against bacteria within the bone or joint site due to overly reduced contact time
Solution Approach 1:
The patent embeds a reservoir containing antibiotic-eluting beads inside the prosthesis structure. The reservoir is nested within the prosthesis body, allowing the antibiotic delivery system to be integrated within the implant rather than applied externally. This enables prolonged antibiotic release directly at the implant site, effectively treating bacteria within the bone or joint site while maintaining the prosthesis structural integrity.
Solution Approach 2:
The patent introduces antibiotic-eluting beads as an intermediary substance between the antibiotic reservoir and the surrounding tissue. These beads absorb antibiotic solution and gradually elute it into the surrounding bone or joint site, extending the contact time and ensuring effective antibiotic delivery to bacteria within the implant site. The beads act as a controlled release mechanism, mediating between the stored antibiotic and the target bacteria.
2Device complexity
If a one-stage treatment is used where the new prosthesis is immediately inserted after cleaning the surgical site, then the treatment procedure is simplified, but the risk of reinfection increases due to inadequate antibiotic delivery
Solution Approach 1:
The patent incorporates antibiotic-loaded beads into the prosthesis before implantation, performing the antibiotic loading action in advance during the manufacturing or preparation phase. This preliminary action ensures that the prosthesis is pre-equipped with a sustained-release antibiotic system, eliminating the need for separate antibiotic application steps during surgery while maintaining effective infection prevention and treatment capabilities.
Solution Approach 2:
The patent combines the prosthesis structure with the antibiotic delivery system into a single integrated device. The reservoir containing antibiotic-eluting beads is merged with the prosthesis body, creating a unified implant that simultaneously provides mechanical support and sustained antibiotic release. This merging allows the one-stage treatment to maintain both procedural simplicity and infection prevention reliability.
3Ease of repair
If the prosthesis is inserted without bone cement, then it is more easily removable in case of new infection, but the use of bone cement is substantially required when bone conditions are compromised
Solution Approach 1:
The patent changes the fixation method from mechanical interlocking with bone cement to biological integration through porous coating. The porous coating on the prosthesis surface allows bone ingrowth, creating a strong biological bond that replaces the need for bone cement. This parameter change in the fixation mechanism maintains ease of removal (by disrupting bone ingrowth rather than cement bond) while providing adequate fixation strength even in compromised bone conditions through enhanced osseointegration.
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 prosthetic device effectively prevents or treats infections by providing sustained antibiotic release, reducing the risk of reinfection and maintaining mechanical properties comparable to conventional prostheses.
Implementation Method 1
The filler material (7) has a capillary capacity and it is capable of absorbing a solution containing an antibiotic or medical substance
Implementation Method 2
such prosthetic device is capable of eluting or diffusing an antibiotic substance in order to prevent the onset of an infection or cure an infection underway
Data Source
AI summary
Prosthetic device suitable for being implanted in a bone or joint site of the human body, including a prosthetic body, wherein the prosthetic device includes or can be added with antibiotic or a medical substance.