A New Unibody Branched Stent-graft for Reconstruction of the Canine Aortic Arch

Li W, Xu K, Zhong H, et al (The First Affiliated Hosp of China Med Univ, Shenyang, Liaoning, PR China) Eur J Vasc Endovasc Surg 44:139-144, 2012^§

Abstract

Objectives

To evaluate the feasibility and safety of a new unibody branched stent-graft for reconstruction of the canine aortic arch.

Materials and Methods

Twenty adult hybrid dogs were used for the experiments. Ten dogs were implanted with single-branched stent-grafts; the other ten dogs were implanted with double-branched stent-grafts. The stent-grafts were implanted transluminally via the abdominal aorta. The branched limbs were caught and pulled into supra-aortic vessels using gooseneck snare wires introduced via the axillary arteries. The animals were euthanized 4 months after implantation.

Results

One of the ten dogs implanted with a single-branched stent-graft died from failure of the implantation procedure, and two of the ten dogs implanted with double-branched stent-grafts died from failure of the procedure and excessive blood loss. After month 4, the remaining unibody branched stent-grafts were patent and did not migrate.

Conclusions

This new unibody branched stent-graft could be used to reconstruct the aortic arch. This is a total endovascular technique, and compared to other branched stent-grafts appears to be safer and easier to implant (Figs 1 and 3–5).

Figure 1 The unibody branched stent-graft. (A) The single-branched stent-graft consists of a branched limb for the left subclavian artery (LSA) and the main stentgraft. The first Z segment of the main stent-graft is bare. (B) The double-branched stent-graft consists of two branched limbs and the main stent-graft. The first limb is for the innominate artery (IA) and the second limb is for the LSA. The first Z segment of the main stent-graft is bare. (Reprinted from European Journal of Vascular and Endovascular Surgery. Li W, Xu K, Zhong H, et al. A new unibody branched stent-graft for reconstruction of the canine aortic arch. Eur J Vasc Endovasc Surg. 2012;44:139-144, Copyright 2012, with permission from European Society for Vascular Surgery.)

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