TRANS-AORTIC PROXIMAL AORTIC STENT GRAFT

Abstract

A trans-aortic proximal aortic stent graft [TAPAS graft] (7) for introducing into a blood vessel. A a tubular sheath which encases a folded self-expanding prosthesis (4) from the inside as well as from the outside such that a sheath outer wall (2) of the sheath lies against the prosthesis (4) from the outside and a sheath inner wall (3) lies against the prosthesis from the inside and keeps the prosthesis (4) folded. The prosthesis (4) is surrounded by the sheath at the distal end in the transition from the sheath inner wall (3) to the sheath outer wall (4), and the prosthesis (4) is provided with an anchor (8) at the proximal end. Also, a method for using a trans-aortic proximal aortic stent graft [TAPAS graft] (7).

Claims

1. A Trans Aortic Proximal Aortic Stent Graft [TAPAS-Graft] (7) for insertion into a blood vessel, comprising a tubular sheath surrounding a folded, self-expanding prosthesis (4) both internally and externally, such that a sheath outer wall (2) of the sheath lies against the outside of the prosthesis (4) and a sheath inner wall (3) lies against the inside of the prosthesis and holds the prosthesis (4) folded, wherein a distal end of the prosthesis (4) is surrounded by the sheath in a transition from the sheath inner wall (3) to the sheath outer wall (4) and the prosthesis (4) is provided with an anchor (8) at the proximal end.

2. The Trans Aortic Proximal Aortic Stent-Graft [TAPAS-Graft] (7) for insertion into a blood vessel according to claim 1, wherein in the sheath a guide (5), in particular a guide catheter, is introduced, which is releasably connected to the anchor (8) on the prosthesis (4) via a releasable fixation with release mechanism (6) connectable.

3. The Trans Aortic Proximal Aortic Stent Graft [TAPAS-Graft] (7) for insertion into a blood vessel according to claim 2, wherein the releasable fixation with release mechanism (6) is designed as a cord-splint mechanism.

4. A method of using a Trans Aortic Proximal Aortic Stent-Graft [TAPAS Graft] (7) according to claim 2, with the steps: fixing the TAPAS graft (7) to the guide (5), wherein the releasable fixation with the trigger mechanism (6) connects the guide (5) to the anchor (8) on the prosthesis, introducing the TAPAS graft (7) via the guide (5) (into a blood vessel), preferably under image converter (BV) control, releasing the TAPAS graft (7) by fully releasing and deploying the folded, self-expanding prosthesis (4) by pulling out the sheath, and thereby engaging the prosthesis (4) on a blood vessel wall (1); positioning the prosthesis (4) via the guide (5) fixed with the anchoring (8) to the prosthesis (4) and releasably fixing with release mechanism (6) to the anchor, separating the prosthesis (4) from the guide (5) by actuation of the release mechanism, removing the guide (5) with the sheath.

Description

[0039] There is shown in:

[0040] FIG. 1 an inventive device in a first position in cross section;

[0041] FIG. 2 an inventive device in the first position shown in FIG. 1 in longitudinal section;

[0042] FIG. 3 a proximal anchor on a prosthesis in the first position in cross section;

[0043] FIG. 4 a proximal anchor of the release mechanism in the first position in perspective lateral view and

[0044] FIG. 5 in an inventive device in the second position in longitudinal section.

[0045] In FIG. 1, an inventive TAPAS graft 7 is shown in a first position in cross-section. From outside to inside, the figure shows a blood vessel wall 1 and a tube-like, folded prosthesis 4 held between a sheath outer wall 2 and sheath inner wall 3.

[0046] FIG. 2 shows an inventive TAPAS graft 7 in a first position in longitudinal section. From outside to inside, the figure shows a blood vessel wall 1 and a prosthesis 4 held between a sheath outer wall 2 and sheath inner wall 3. The inventive TAPAS graft 7 is releasably fixed to the prosthesis 4 to a centrally located guide 5, in particular a guide catheter or guide wire, via an anchor 8. The anchor 8 on the prosthesis 4 is releasably connected to the proximal end of the guide 5, which in the figure is at the top, with a release mechanism 6, wherein this preferably works by a cord-splint mechanism such that after an unfolding of the prosthesis 4 with the pulling out of the sheath and the guide the connection of the prosthesis 4 with the guide 5 can be released with the release by the release mechanism 6.

[0047] FIG. 3 shows an anchor 8 with releasable fixation 6 on the guide 5 of the trigger mechanism in the first position in cross section at the proximal end 11 of the prosthesis 4. Here, for example, a cord-splint mechanism can be effective.

[0048] FIG. 4 shows an anchor with releasable fixation 6 of the release mechanism in the first position in the cross section at the proximal end 11 of the prosthesis 4.

[0049] FIG. 5 shows an inventive TAPAS graft 7 in a second position in longitudinal section. This second position shows a partial unfolding of the prosthesis 4, by a partial removal or displacement of the sheath outer wall 2, wherein individual elements/sections of the prosthesis 4 in the upper region of the figure cling to the blood vessel wall 1. The sheath 9 is moved by pulling on the guide 5 and thus frees the unfolding process of the prosthesis 4.

[0050] In the lower part of the figure, i.e. at the distal end 10, the prosthesis 4 is still held between the outer sheath wall 2 and sheath inner wall 3.

[0051] The inventive TAPAS graft 4 is releasably fixed to a centrally located guide 5. The detachable fixation 6 takes place on the (in the figure top) shown proximal end of the prosthesis 4 and preferably only after the complete deployment of the prosthesis 4 is it released from this and pulled out with the guide 5.

LIST OF REFERENCE NUMBERS

[0052] 1 Blood vessel wall [0053] 2 Sheath outer wall [0054] 3 Sheath inner wall [0055] 4 Prosthesis [0056] 5 Guide [0057] 6 Releasable fixation with release mechanism [0058] 7 TAPAS Graft [0059] 8 Anchor [0060] 9 Sheath [0061] 10 Distal end [0062] 11 Proximal end