New approach to aortic dissection: development of an insertable aortic prosthesis.
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); it 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 degrees 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.
Yoshida
H
H
Department of Cardiovascular Surgery, Hokkaido University, Sapporo, Japan.
Yasuda
K
K
Tanabe
T
T
D000784:Aortic Dissection / Q000601:surgery*; D000818:Animals; D017545:Aortic Aneurysm, Thoracic / Q000601:surgery*; D001807:Blood Vessel Prosthesis / Q000295:instrumentation* / Q000379:methods; D002408:Catheters, Indwelling; D004285:Dogs; D008954:Models, Biological; D019736:Prostheses and Implants; D011474:Prosthesis Design; D015996:Survival Rate; D016896:Treatment Outcome