High-Speed Medical Device Coating Apparatus
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Solution Overview
Problem
Traditional coating methods for medical devices, such as dip coating, often result in irregular coatings with thicker and thinner sides, leading to sub-optimal durability and increased friction, especially on surfaces with varying topologies, and fail to deliver precise drug doses effectively.
Innovation Solution
A coating apparatus that rotates medical devices at high speeds (over 500 RPM) using a fluid applicator, generating centrifugal force to ensure uniform coating thickness across surfaces with high and low points, preventing coating material from pooling in low areas and maintaining it on the device surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional dip coating methods are used, then the coating process is simple, but the coating uniformity is poor with variable thickness
Solution Approach 1:
The medical device is rotated at high speeds (greater than 500 RPM) during coating application, transforming the static dip coating process into a dynamic rotating coating process. This rotation ensures uniform coating distribution around the entire circumference of the device, eliminating the thick and thin sides problem inherent in traditional dip coating methods.
Solution Approach 2:
A fluid applicator is used to apply the coating solution to the rotating medical device. The fluid applicator delivers the coating material in a controlled manner onto the rotating surface, ensuring uniform deposition throughout the rotation cycle and achieving consistent coating thickness.
2Measurement precision
If traditional coating methods are used, then the process is simple, but the drug delivery precision is poor
Solution Approach 1:
The high-speed rotation of the medical device during coating ensures that the coating material, including any embedded drugs, is distributed uniformly around the entire circumference. This dynamic process guarantees that each segment of the device receives the precise intended dose, eliminating the variability in drug delivery that occurs with static dip coating methods.
Solution Approach 2:
The coating process incorporates control mechanisms that monitor and adjust the coating application in real-time during rotation, ensuring that the desired coating thickness and drug dosage are achieved uniformly across the entire device surface.
3Manufacturing precision
If coating is applied to surfaces with varying topology, then complete surface coverage is attempted, but coating material pools in low areas creating irregular thickness
Solution Approach 1:
By rotating the medical device at high speeds during coating application, the coating material is continuously redistributed around the entire circumference. This dynamic motion prevents pooling in low areas and ensures that coating material is evenly distributed across surfaces with varying topology, achieving uniform thickness despite surface irregularities.
Solution Approach 2:
The high-speed rotation creates a form of mechanical motion that continuously agitates the coating material during application, preventing it from settling and pooling in low areas. This mechanical action ensures uniform coating distribution even on surfaces with high and low points.
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 high-speed rotation mechanism achieves uniform coatings on medical devices, enhancing durability and precision in drug delivery by maintaining the coating evenly around the circumference and preventing material migration into porous surfaces, with over 99% efficiency in coating solution deposition.
Implementation Method 1
A coating apparatus that rotates medical devices at high speeds (over 500 RPM) using a fluid applicator, generating centrifugal force to ensure uniform coating thickness across surfaces with high and low points
Data Source
AI summary
Embodiments of the invention include apparatus and methods for coating medical devices. In an embodiment, the invention includes a coating apparatus including a coating application unit including a fluid applicator; a first rotation mechanism and a second rotation mechanism; and a controller, wherein the controller causes the first rotation mechanism and the second rotation mechanism to rotate a medical device at substantially the same speed, wherein the speed is greater than 500 rotations per minute. In an embodiment, the invention includes a method of coating a medical device including rotating a medical device with a rotation mechanism at a speed of greater than 500 rotations per minute; contacting the medical device with a fluid applicator; and applying a coating solution to the device. In an embodiment, the invention includes a medical device. In some embodiments a surface of a shaft of the device comprises high points and low points.