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Related Experiment Videos

The CarboMedics "Top-Hat" supraannular prosthesis.

J M Bernal1, R Martin-Duran, J M Rabasa

  • 1Department of Cardiovascular Surgery, Hospital Universitario Valdecilla, Universidad de Cantabria, Santander, Spain.

The Annals of Thoracic Surgery
|June 4, 1999
PubMed
Summary

The CarboMedics "Top-Hat" supraannular prosthesis enables the implantation of larger aortic prostheses, particularly beneficial for patients with smaller aortic roots. This design offers improved outcomes in aortic valve replacement surgery.

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Area of Science:

  • Cardiovascular Surgery
  • Biomedical Engineering
  • Prosthetic Devices

Background:

  • The CarboMedics "Top-Hat" supraannular prosthesis was developed to facilitate the implantation of larger aortic prostheses.
  • This design addresses limitations in fitting standard prostheses in certain patient anatomies.

Purpose of the Study:

  • To evaluate the efficacy and outcomes of the CarboMedics "Top-Hat" supraannular aortic prosthesis.
  • To compare the size of implanted supraannular prostheses with standard prostheses and other aortic valve models.

Main Methods:

  • A cohort of 127 patients received the CarboMedics "Top-Hat" supraannular aortic prosthesis between June 1993 and November 1996.
  • Patient data, including prosthesis size and body surface area, were compared with 656 patients receiving standard CarboMedics prostheses and 2,927 patients receiving other aortic prostheses.

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  • Echocardiographic studies were performed on surviving patients, with an average follow-up of 15.7 months.

    • Main Results:

    • Supraannular prostheses were, on average, one size larger than standard prostheses (20.8+/-2.6 mm vs. 18.9+/-2.8 mm).
    • Patients receiving the supraannular prosthesis had a significantly smaller body surface area compared to those with standard or other aortic prostheses.
    • Hospital mortality was 3.9%, late mortality was 5.5%, and actuarial survival was 86.5%+/-3.9% at 42 months.

    Conclusions:

    • The CarboMedics supraannular prosthesis allows for the implantation of larger devices compared to standard CarboMedics or other aortic prosthesis models.
    • This is particularly advantageous for patients with small aortic roots, potentially improving surgical outcomes.
    • The study supports the use of supraannular designs in specific patient populations requiring larger valve replacements.