Medical device for anastomosis
A medical device for an anastomosis is provided. The medical device distinguishes an inner tubular layer, an outer tubular layer, and a support element defining a longitudinal axis. It further distinguishes two or more independent C-rings distributed and positioned at an acute orientation angle relative to the longitudinal axis of the support element at one end of the support element. The support element and the two or more C-rings are embedded in between the inner and the outer tubular layers. The types of applications one could envision are e.g. a proximal anastomosis, distal anastomosis, or side-to-side anastomoses, in a customized pre-fabricated graft. Embodiments of the invention could also be incorporated into an anastomotic connector device design. Embodiments of the invention could further be envisioned as vascular grafts applications such as Coronary Artery Bypass Graft (CABG), dialysis access grafts and peripheral vascular applications.
1 . A medical device to form a union between two tubular structures, comprising:
a first tubular structure configured to be connected to a second tubular structure via a union, wherein the first tubular structure comprises:
(a) an inner tubular layer;
(b) an outer tubular layer;
(c) a support element defining a longitudinal axis; and
(d) one or more independent not fully closed circular structures each independently distributed and each independently positioned at an acute orientation angle relative to the longitudinal axis of the support element at one end of the support element,
wherein the support element and the one or more independent not fully closed circular structures are embedded in between the inner and the outer tubular layers,
wherein the support element further comprises an end-ring attached to the one end of the support element, wherein the end-ring is a circular or oval non-deformable closed end-ring, and wherein the circular or oval non-deformable end-ring is aligned substantially in parallel, adjacent, yet independently positioned to the one or more independent not fully closed circular structures, and
wherein at least one of the one or more independent, not fully closed circular structures are configured to be incorporated into the union between the first tubular structure and the second tubular structure.
2 . The medical device as set forth in claim 1 , wherein the inner tubular layer is an electrospun layer.
3 . The medical device as set forth in claim 1 , wherein the outer tubular layer is an electrospun layer.
4 . The medical device as set forth in claim 1 , wherein the one or more independent, not fully closed circular structures are made of nitinol.
5 . The medical device as set forth in claim 1 , wherein a distance between the circular or oval non-deformable end-ring attached to the support element and the first independent, not fully closed circular structures is in the range of 0.5 to 1.5 mm.
6 . The medical device as set forth in claim 1 , wherein in the case of two or more independent, not fully closed circular structures, a distance in-between two adjacent not fully closed circular structures is in the range of 1.5 to 2.5 mm.
7 . The medical device as set forth in claim 1 , wherein the acute orientation angle is a 30 degree angle to a 60 degree angle.
8 . The medical device as set forth in claim 1 , wherein the acute orientation angle is a 15 degree angle to a 90 degree angle.
9 . The medical device as set forth in claim 1 , wherein the support element is a stent, an SRS, a coil, a wire, a braid or any other type of support structure used in cardiovascular implants.
10 . The medical device as set forth in claim 1 , wherein the one or more independent, not fully closed circular structures are under pre-load.
11 . The medical device as set forth in claim 1 , wherein the one or more independent, not fully closed circular structures prevent radial deformation.