Disposable Elastic Head Coating Device for Medical Implants
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Solution Overview
Problem
Current medical implant coating technologies are complex, expensive, and not easily adaptable for variable antibiotic protection, especially in non-cemented joint endoprostheses and osteosynthesis materials, with challenges in fixing antibiotics on the implant surface and requiring extensive warehousing for different antibiotic combinations.
Innovation Solution
A device with a container containing a liquid pharmaceutical active substance and an elastic head with channels for applying the substance to the implant surface, allowing for easy adaptation and use during operations, using a rotatable elastic head to minimize friction and ensure even coating without releasing non-biodegradable particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional industrial coating methods are used for medical implants, then coating uniformity and reliability are improved, but device complexity and production cost increase
Solution Approach 1:
The patent employs disposable applicators with pre-attached coating compositions, eliminating the need for complex reusable coating devices. Each applicator is single-use, ensuring sterility and eliminating cleaning/maintenance requirements while maintaining reliable coating application. This resolves the contradiction by providing industrial-level coating reliability through simple, disposable tools rather than complex reusable equipment.
Solution Approach 2:
The coating composition is pre-applied to the applicator in a controlled environment before sterilization. This preliminary action ensures uniform coating distribution and proper formulation preparation, while the actual implant coating occurs simply by pressing the pre-prepared applicator against the implant surface. This eliminates the need for complex real-time coating control systems during the surgical procedure.
2Ease of operation
If water-soluble antibiotic salts are used for coating, then ease of application is improved, but fixing the antibiotic on the implant surface becomes difficult
Solution Approach 1:
The patent uses composite coating compositions that combine water-soluble antibiotic salts with carrier materials or matrices that provide adhesion to the implant surface. This composite structure allows the antibiotic to remain water-soluble for easy application while the carrier material ensures reliable fixation and controlled release. The composite material resolves the contradiction by integrating both the ease of application and the fixation reliability into a single coating system.
3Reliability
If different antibiotic coatings are prepared for different patients, then treatment effectiveness is improved, but warehousing complexity and cost increase
Solution Approach 1:
The patent enables dynamic customization of antibiotic coatings at the point of use rather than requiring static pre-prepared coatings for each patient. The system allows selection and application of different antibiotic compositions from a range of options during the surgical procedure, providing treatment effectiveness tailored to specific patient needs without the need for extensive pre-warehousing of multiple specialized coating types.
Solution Approach 2:
The patent employs a universal applicator system that can accommodate multiple different antibiotic coating compositions. A single versatile platform can apply various antibiotic formulations, eliminating the need for separate specialized devices for each antibiotic type. This universality reduces warehousing complexity while maintaining the ability to provide effective, customized treatment for different patients.
4Ease of operation
If elastic head with channels is used for coating, then ease of operation and adaptability are improved, but manufacturing precision requirements increase
Solution Approach 1:
The elastic head with channels is implemented as a disposable component that is pre-manufactured with the required precision. By making it single-use, the system can incorporate higher manufacturing precision without increasing cost, as each unit is mass-produced to specification and then discarded. This resolves the contradiction by allowing high precision manufacturing in a disposable component that provides excellent ease of operation during use.
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
Enables simple, efficient, and adaptable antibiotic coating of various medical implants during operations, providing effective antibiotic protection with minimal disruption and reduced costs, suitable for both cemented and non-cemented implants.
Implementation Method 1
When the surface to be coated comes into contact with the elastic head, in particular when it is brushed over or rolled over, the surface to be coated is wetted with the liquid
Implementation Method 2
which has at least one channel connected to the interior of the container, so that when the elastic head sweeps over or rolls over the surface to be coated, the liquid wets the surface to be coated
Implementation Method 3
an elastic head for applying the liquid to a surface to be coated
Data Source
Figure 1
Figure 2
AI summary
The apparatus (1) comprises a container (4) containing the liquid (6) which includes one pharmaceutically active substance such as gentamicin sulfate solution. A resilient head (8) made of biocompatible elastomer applies the liquid onto the to-be-coated surface. The resilient head is connected via one channel (12) with the interior of the container. The container is formed with elastic walls, so that the liquid flows through the channel to the surface of the head, during the application of manual pressure on the elastic container walls. An independent claim is included for method for coating medical implant.