Dayville, CT (June 2001) û Foster CorporationÆs new SEPÖ low friction olefin elastomer has been selected for the critical ear pieces in Visualization TechnologyÆs InstaTrak® 3500 headset. The headset is part of a revolutionary system used for surgical navigation during endoscopic sinus procedures. The earpieces must maintain fixed points of contact in the ear during the procedure while offering sufficient comfort during prolonged patient use. FosterÆs new olefin elastomer offers flexibility for a secure and comfortable fit without the normal material tackiness.

The InstaTrak® System is a three-dimensional guidance system used in minimally invasive image guided surgery, such as endoscopic sinus surgery. The InstaTrak® System tracks the precise location of surgical instruments during surgery and displays the location on pre-operative computed tomography (CT) scan images of the patientÆs sinuses. This technology complements traditional endoscopic images and provides the surgeon with a more comprehensive anatomic view, enabling safer, more effective procedures.

The headset provides critical markers during preoperative CT scanning and surgery that are essential for software conversion to a visual image and navigation system. The earpieces provide two of the three rigid anatomy points necessary for reproducibility. These earpieces contact the bone structure of the inner ear and can be in position for prolonged periods of time. Harder ear piece materials proved to be unforgiving and caused patient discomfort. Softer materials were either too forgiving or were accompanied by a tackiness that created discomfort upon removal.

According to Ken Ayotte, manufacturing engineer at Visualization Technology, "FosterÆs low friction olefin elastomer improved comfort of the ear pieces without loss in performance. Acetal proved far too hard on the patientÆs ear, while the high frictional properties of standard elastomers made it difficult to remove the earpieces following use. FosterÆs selective enhancement of the olefin elastomerÆs frictional properties without losing mechanical performance was exactly what this application needed."

Low friction olefin elastomers represent FosterÆs emerging family of low friction polymers designed to enhance lubricity without substantial attrition in other key properties. This precision alteration technology is part of the companyÆs development of an entire line of Selectively Enhanced Polymers (SEPÖ compounds).

Foster Corporation is a global market leader in design, development and delivery of specialty thermoplastic solutions for medical applications. Visualization Technology is a leader in sinus and advanced ENT image guidance systems. For more information on Foster, please call 860.774.3964 or visit www.fostercomp.com. Visualization Technology can be reached at 800-708-3856 or www.visualizationtechnology.com.

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Contact:Dan Lazas
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