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Summary and recommendations

P D Stein1, K C Dellsperger

  • 1Henry Ford Hospital, New Center Pavilion, Detroit, MI 48202-2691, USA.

The Journal of Heart Valve Disease
|August 1, 1996
PubMed
Summary
This summary is machine-generated.

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Björk-Shiley Delrin (BSD) heart valves show minimal wear-related issues, with regurgitation not always indicating dysfunction. Prophylactic replacement is not recommended; patients require individualized assessment based on valve function.

Area of Science:

  • Biomaterials Science
  • Cardiovascular Surgery
  • Medical Device Engineering

Background:

  • Up to 7,000 patients may have Björk-Shiley Delrin (BSD) heart valves implanted for 15-27 years.
  • Clinical uncertainty exists regarding the long-term function and need for prophylactic replacement of BSD valves.

Purpose of the Study:

  • To evaluate the long-term performance and safety of Björk-Shiley Delrin (BSD) heart valves.
  • To determine if prophylactic replacement of BSD valves is warranted.

Main Methods:

  • Review of clinical data and engineering studies related to BSD valve function.
  • Analysis of regurgitation patterns and disc wear in implanted BSD valves.
  • Assessment of reported cases of valve component failure, including disc fracture and strut fracture.

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Main Results:

  • Clinically significant regurgitation can occur due to Delrin disc wear in some BSD valves over time.
  • Regurgitation in normally functioning BSD valves is higher than in Björk-Shiley Radiopaque Spherical disc valves.
  • Only two cases of inlet strut fracture were reported; no catastrophic failures linked to Delrin disc fracture.
  • Engineering studies indicate no increased risk of Delrin disc failure from fracture or fatigue.
  • Disc wear, when present, occurs at a manageable rate, allowing for timely diagnosis and non-emergency treatment.

Conclusions:

  • Björk-Shiley Delrin (BSD) heart valves are expected to provide years of continued service.
  • Disc wear does not necessitate prophylactic valve removal; individualized patient management is crucial.
  • Treatment decisions should be based on the specific function of each patient's valve.