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The Bjork-Shiley Heart Valve

The Bjork-Shiley Heart Valve. By Daniel Wec. Brief Overview. the disc to open and close to enable the blood to flow through. The Bjork-Shiley Heart Valve is an artificial heart valve used to deal with defective heart valves or heart valvular diseases.

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The Bjork-Shiley Heart Valve

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  1. The Bjork-Shiley Heart Valve By Daniel Wec

  2. Brief Overview the disc to open and close to enable the blood to flow through. • The Bjork-Shiley Heart Valve is an artificial heart valve used to deal with defective heart valves or heart valvular diseases. • It is a mechanical heart valve and has been in use since the 1970s. • It is based on a tilting disc design where two struts (inlet and outlet) allow

  3. History • 1969 – The Bjork-Shiley Heart Valve is developed by Dr. Viking Bjork and Donald Shiley. • 1970s – It is one of the most common mechanical heart valves to be implanted in patients who require an artificial heart valve. • 1979 – Pfizer buys out Shiley, Inc and creates secrecy agreements which prevent important information (faulty outlet tip) to be released to the FDA and doctors. • 1986 – FDA takes the heart valve off the market. • 1992 – Pfizer sells Shiley’s businesses to Sorin Biomedical. • 1994 – Lawsuit is settled and Pfizer is to pay around $20 million (some estimates are closer to $200 million.)

  4. Currently • Alliance Medical Technologies purchased the heart valve line from Sorin Biomedical. • The firm has former Shiley and Pfizer employees working for it.

  5. Limitations • Open-Heart Surgery • Blood Thinning Medication • Backflow • Blood Infection • Blood Tests • 30 year lifespan

  6. Future The Bjork-Shiley Heart Valve can once again become used and if it is, the following are improvements that can be made to allow the device to function better: • Remove the need for blood thinning medication. • Reduce the amount of backflow. • Lower the risk of blood infection. • Increase the time between blood tests from 4-6 weeks or possibly even remove the need for blood tests at all. • Increase the durability and, in turn, the lifespan of the device.

  7. Works Cited • "Artificial Heart Valve." Wikipedia. N.p.. Web. 24 Nov 2012. <http://en.wikipedia.org/wiki/Artificial_heart_valve> • "Bjork Shiley Heart Valve." Lawyers and Settlements. N.p., 24 2012. Web. 24 Nov 2012. <http://www.lawyersandsettlements.com/lawsuit/bjork_shiley_heart_valves.html> • "Bjork-Shiley valve." Wikipedia. N.p.. Web. 24 Nov 2012. <http://en.wikipedia.org/wiki/Bjork–Shiley> • "Mechanical Heart Valves." cedars-sinai. N.p., n.d. Web. 24 Nov 2012. <http://www.cedars-sinai.edu/Patients/Programs-and-Services/Heart-Institute/Centers-and-Programs/Cardiothoracic-Surgery-Services/Heart-Valve-Repair-and-Replacement/Mechanical-Heart-Valves.aspx; • "Mechanical Heart Valve." drexel.edu. N.p., 17 2008. Web. 24 Nov 2012. <http://www.pages.drexel.edu/~nag38/History.html>

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