Experimental study of a new sutureless intraluminal graft with a shape-memory alloy ring Chuanrui Yang, MD, Yanqing Sun, MD, Peiqing Dong, MD, Huazhong.

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Presentation transcript:

Experimental study of a new sutureless intraluminal graft with a shape-memory alloy ring Chuanrui Yang, MD, Yanqing Sun, MD, Peiqing Dong, MD, Huazhong Wang, MD The Journal of Thoracic and Cardiovascular Surgery Volume 107, Issue 1, Pages 191-195 (January 1994) DOI: 10.5555/uri:pii:S0022522394704694 Copyright © 1994 Mosby, Inc. Terms and Conditions

Fig. 1 Schematic drawing of the ring portion of the graft. A, The ring is made of a flat shape-memory alloy with a 15 mm diameter. B, The ring can be compressed to an 8 mm diameter in 4° C normal saline solution and kept at a smaller diameter during aortic insertion. C, The ring can recover its original shape after 20 ml normal saline solution at 38° C is injected onto its surface. The Journal of Thoracic and Cardiovascular Surgery 1994 107, 191-195DOI: (10.5555/uri:pii:S0022522394704694) Copyright © 1994 Mosby, Inc. Terms and Conditions

Fig. 2 New sutureless intraluminal graft with titanium-nickel shape-memory alloy ring is placed at both ends of a knitted Dacron graft and covered with cuffs of Dacron fabric that are turned over on themselves at both ends. The Journal of Thoracic and Cardiovascular Surgery 1994 107, 191-195DOI: (10.5555/uri:pii:S0022522394704694) Copyright © 1994 Mosby, Inc. Terms and Conditions

Fig. 3 Implantation procedure. A, With the ring compressed in 4° C normal saline solution and kept at a smaller diameter (7 to 8 mm), the graft is introduced into the aorta until the proximal and distal spools are covered entirely with aortic tissue. B, After insertion to the appropriate level, 20 ml normal saline solution at 38° C was injected onto its surface until the rings recovered their original shape. The spools then were secured with two wide circular ties. The Journal of Thoracic and Cardiovascular Surgery 1994 107, 191-195DOI: (10.5555/uri:pii:S0022522394704694) Copyright © 1994 Mosby, Inc. Terms and Conditions

Fig. 4 Aortogram 90 days after implantation shows neither stenosis nor dilation at the anastomosis. The Journal of Thoracic and Cardiovascular Surgery 1994 107, 191-195DOI: (10.5555/uri:pii:S0022522394704694) Copyright © 1994 Mosby, Inc. Terms and Conditions

Fig. 5 Macroscopic findings of internal lumen. The graft was covered with neointima, and anastomotic lines were smooth. No detachment of the ring was observed 90 days after implantation. The Journal of Thoracic and Cardiovascular Surgery 1994 107, 191-195DOI: (10.5555/uri:pii:S0022522394704694) Copyright © 1994 Mosby, Inc. Terms and Conditions

Fig. 6 Longitudinal section of aorta 90 days after operation. Elastic fibers are stained black. The area of compression by the silk tie and the ring is shown: the pressure of the tie, which is 5 mm wide and 1 mm thick,on the aorta wall is reduced so that the continuity of the aortic wall was preserved well (Verhoeff staining, original magnification × 100). The Journal of Thoracic and Cardiovascular Surgery 1994 107, 191-195DOI: (10.5555/uri:pii:S0022522394704694) Copyright © 1994 Mosby, Inc. Terms and Conditions

Fig. 7 Longitudinal section of aortic wall 30 days after operation. Outer and inner fourth of the aortic wall was compressed by the spool, and the number of the smooth muscle cell nuclei in this area was less than that in normal aortic wall tissue (hematoxylin and eosin staining, original magnification × 200). The Journal of Thoracic and Cardiovascular Surgery 1994 107, 191-195DOI: (10.5555/uri:pii:S0022522394704694) Copyright © 1994 Mosby, Inc. Terms and Conditions