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Coatings in Biomedical Device Applications
There are many types of coatings used in the manufacturing and preparation of biomedical devices. Some coatings protect the device from corrosion while others protect from complications such as tissue trauma, infection, or even rejection. Drug delivery coatings are also becoming common. Other biomedical devices, including angioplasty balloons, are freestanding membranes that must be of uniform and fixed thickness in order to function properly.
Measurement methods of these coating thicknesses vary, but one thing is certain – the most commonly used methods (such as weighing a part before and after coating) do not detect incomplete coverage or coating non-uniformities that can lead to device failure.
The Filmetrics Advantage
Filmetrics offers a broad range of solutions for measuring coated biomedical devices:
- Stents: The small coated areas of stents usually require a microscope-based instrument. Our F40 is used in dozens of labs to measure passivation and/or drug-delivery coatings. A special stent fixture for convenient rotational positioning during measurement is available. A special version of our “Thickness Imaging” F80 system (see U.S. Pat# 7,151,609) makes an automated thickness map of the entire stent surface by simply rotating the stent under its measurement head.
- Implants: Irregularly-shaped surfaces are generally the only challenge when measuring coatings on implants. Filmetrics has a full line of probes for this application.
- Guide Wires & Needles: Like stents, these devices often benefit from microscope-based instruments such as the F40. Two-dimensional mapping of thickness over microscopic areas is possible with the F42.
- Catheter and Angioplasty Balloon Wall Thickness: Thickness greater that 100 microns and visible-spectrum opacity both mean that the F20-NIR is the preferred instrument for this application in large number of labs worldwide.
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Contact Michael Klayman or any of our other thin-film experts to discuss your biomedical device application.
Filmetrics offers free trial measurements – results are typically available in 1-2 days. |
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