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Laser scanning helps validate venous filter design.

* high accuracy, resolution

* no-contact scanning

When an arterial filter was being designed several years ago, extensive CFD analysis was performed to optimize the device to minimize shear stress on delicate blood cells. Since the resulting design has proven itself as safe and effective, it became model on which to base the design of a venous filter.

Because of the critical nature of the design, the geometry was too complex to be characterized fully via contact-dependent CMM. Outsourcing the specialized job, the medical manufacturer emailed the CAD geometry and shipped the physical part to Laser Design, who scanned the part that day, generating a point cloud with millions of points. Geomagic Qualify was then used to generate a color deviation report between a graphical comparison of the manufactured part vs. the CAD model, coding differences in colors that indicate the magnitude of the variation from the design intent. Based on these scans, the manufacturer's engineers modified their CAD model to match it more perfectly to the actual as-built part.

The new venous filter has since gone into production and has proven just as safe and effective as its predecessor.

Laser Design, Minneapolis, MN

Circle 246, or www.rsleads.com/509df-246

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Title Annotation:Application Xtra
Publication:Designfax
Date:Sep 1, 2005
Words:201
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