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Ann Thorac Surg 1994;58:806-810
© 1994 The Society of Thoracic Surgeons

Articles

New approach to aortic dissection: Development of an insertable aortic prosthesis

Hideaki Yoshida, MD*, Keishu Yasuda, MD, Tatsuzo Tanabe, MD

Department of Cardiovascular Surgery and Second Department of Surgery, Hokkaido University, Sapporo, Japan

Accepted for publication January 22, 1994.

* Address reprint requests to Dr Yoshida, Department of Cardiovascular Surgery, Hokkaido University Hospital, N-14, W-5, Kita-ku, Sapporo, 060 Japan.

We have developed a new aortic prosthesis with which we can replace or reinforce the aorta using a simple percutaneous technique. We have named the new prosthesis the shape-memory aortic prosthesis (SAP); if consists of a spiral-shaped nitinol stent and polyurethane tube. It can be compressed inside a 14F catheter at a low temperature and regain its original shape at above 30 °C. As a preliminary study, SAP sutureless grafting into the descending aorta was performed on 10 mongrel dogs. We found that when the proper diameter of SAP was applied, it functioned satisfactorily for 3 months or more. A percutaneous placement technique pertinent to the SAP also was developed and tried on 4 animals. Our procedure was applied to Stanford type B dissection models to close the entry point successfully. This newly developed SAP has potential to be applied to emergency cases of human aortic dissections.




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