Drug-Eluting Stapes Prosthesis for Middle Ear Implants
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Solution Overview
Problem
Current surgical treatments for middle ear hearing impairments, such as otosclerosis, often require separate devices for drug delivery and prosthetic replacement, which can be invasive and inefficient, especially in the limited space of the middle ear.
Innovation Solution
A drug-eluting stapes prosthesis is developed, incorporating a drug-eluting polymer that delivers medication directly to the middle and/or inner ear, combining the functions of a prosthetic and a drug delivery system in a single device, allowing for targeted treatment of conditions like otosclerosis and sensorineural hearing loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate devices are used for drug delivery and prosthetic replacement, then each device can be optimized for its specific function, but the number of implants increases and surgical complexity increases
Solution Approach 1:
The patent combines a prosthetic device with a drug delivery system into a single integrated implant. The prosthetic component provides mechanical support and structural replacement, while the drug delivery component releases medication locally. This merging eliminates the need for separate implants, reducing surgical complexity and the number of foreign bodies in the body while maintaining both structural and therapeutic functions.
Solution Approach 2:
The integrated device performs multiple functions simultaneously: it provides mechanical prosthetic replacement to restore structural function, delivers drug therapy to treat underlying conditions, and potentially provides localized anti-inflammatory or immunomodulatory effects. This multi-functionality allows a single device to address both the mechanical deficit and the pathological process.
2Adaptability or versatility
If separate devices are used for drug delivery and prosthetic replacement, then each device can be independently designed, but surgical procedure complexity increases and operation time increases
Solution Approach 1:
By integrating the drug delivery system with the prosthetic device, the patent enables both components to be implanted simultaneously in a single surgical procedure. This eliminates the need for separate surgical stages, reduces operation time, and simplifies the surgical workflow while maintaining the design flexibility of both components through modular integration approaches.
3Quantity of substance
If drug is delivered systemically, then distribution is widespread, but drug concentration at target site is low and side effects increase
Solution Approach 1:
The integrated device enables localized drug delivery directly at the implantation site, creating a high concentration of drug where it is most needed. This local delivery approach spares the rest of the body from exposure to the drug, thereby reducing systemic side effects while maintaining effective therapeutic concentrations at the target site.
Solution Approach 2:
The prosthetic device serves as an intermediary carrier for the drug delivery system, positioning the drug release mechanism precisely at the target site. This intermediary structure enables controlled local release of medication, ensuring that the drug reaches the intended location with high concentration while minimizing exposure to other tissues.
4Reliability
If additional drug delivery devices are implanted, then drug delivery capability is enhanced, but the limited space in the middle ear is exceeded
Solution Approach 1:
The patent integrates the drug delivery system within the structure of the prosthetic device itself, utilizing the existing volume and space of the prosthetic component to house the drug reservoir and release mechanism. This integration eliminates the need for additional separate drug delivery devices, thereby preserving the limited space in the middle ear while maintaining robust drug delivery capability.
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 approach simplifies surgical procedures, reduces the need for additional implants, and enables controlled, long-term drug delivery directly to the affected areas, enhancing treatment efficacy and patient safety by minimizing the number of components and improving drug concentration at the site of action.
Implementation Method 1
incorporating a drug-eluting polymer that delivers medication directly to the middle and/or inner ear
Data Source
AI summary
A medical implant device includes a prosthesis adapted to replace at least a portion of a bone. The prosthesis includes a drug-eluting polymer adapted to deliver a drug to at least a portion of an area surrounding the prosthesis.