Two-Part Fluid Applicator for Uniform Medical Device Coating
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Solution Overview
Problem
Traditional coating methods for medical devices often result in inconsistent and flawed coatings, compromising the functionality and biocompatibility of implantable or insertable devices, particularly in delivering precise amounts of drugs to the device surface.
Innovation Solution
A two-part fluid applicator system with a flexible first part and a more flexible second part, which includes a central channel and is used in conjunction with a fluid supply conduit and reservoir, allowing for uniform coating application on rotatable medical devices by ensuring consistent contact and precise deposition of coating compositions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional dip coating methods are used, then the coating process is simple to implement, but the coating uniformity and precision are poor
Solution Approach 1:
The coating apparatus is divided into multiple functional modules: a rotation mechanism for the medical device, a fluid applicator with multiple nozzles for coating material delivery, and a controlled environment chamber. This segmentation allows each module to be optimized independently for precision while maintaining overall system manageability
Solution Approach 2:
The patent replaces traditional mechanical dip coating with a controlled fluid delivery system that uses precision positioning and rotational mechanics to achieve uniform coating. The fluid applicator uses controlled flow rates and precise positioning instead of immersion, enabling superior coating uniformity
2Measurement precision
If traditional coating methods are used, then the equipment is simple, but the active agent delivery precision is insufficient
Solution Approach 1:
The fluid applicator incorporates flow rate control with feedback mechanisms that monitor and adjust the coating material delivery in real-time. This ensures precise active agent delivery by compensating for variations in fluid flow, viscosity, or application conditions
Solution Approach 2:
The system enables precise control of coating parameters including fluid flow rate, applicator speed, rotation speed, and temperature. By independently controlling these parameters, the system achieves precise active agent delivery while managing the complexity through modular parameter control
3Reliability
If coating consistency is improved, then the device functionality is enhanced, but the coating process complexity increases
Solution Approach 1:
The coating apparatus incorporates dynamic control elements including variable rotation speeds, adjustable fluid flow rates, and movable applicator positions. These dynamic capabilities enable consistent coating quality across different device types and coating requirements while maintaining process flexibility
Solution Approach 2:
The coating apparatus is designed with universal features that can accommodate different medical device geometries and coating requirements through programmable control. The same basic system can be configured for various coating applications, reducing overall complexity compared to dedicated systems for each application
Data Source
AI summary
Aspects herein relate to apparatus and methods for coating medical devices. In an embodiment, a coating system is included having a two-part fluid applicator defining a central channel, the two-part fluid applicator can include a first part having a first degree of flexibility; and a second part having a second degree of flexibility. The system can further include a fluid supply conduit in fluid communication with the fluid applicator; and a fluid supply reservoir in fluid communication with the fluid supply conduit. Other embodiments are also included herein.