Delivery system aid and associated systems and methods

1 . An endoluminal delivery system, comprising:

an introducer sheath having a proximal end, a distal end, a lumen extending between the proximal end and the distal end, and a proximal opening at the proximal end providing access to the lumen;

a delivery catheter configured to be passed through the proximal opening into the lumen of the introducer sheath;

an endoluminal device releasably maintained along the delivery catheter at a delivery profile that is configured for the endoluminal device to be passed through the proximal opening into the lumen of the introducer sheath while the endoluminal device is maintained in the delivery profile, the endoluminal device having an inner lumen, a first opening providing access to the inner lumen, and a second opening providing access to the inner lumen;

a guidewire tube removably received by the endoluminal device such that the guidewire tube is removable from the endoluminal device when the endoluminal device is in the delivery profile, the guidewire tube passing through the first opening of the endoluminal device into the inner lumen of the endoluminal device, and out of the second opening of the endoluminal device, the guidewire tube having a first end, a second end, and a lumen configured to receive a guidewire; and

an enlarged feature located between the first end and the second end of the guidewire tube, wherein the first end of the guidewire tube has a first end opening and the second end of the guidewire tube has a second end opening to provide access to the lumen of the guidewire tube and receive the guidewire therethrough, the enlarged feature selectively preventing insertion of the guidewire tube through the proximal opening of the introducer sheath into the lumen of the introducer sheath, and the enlarged feature having a surface texture configured to aid in removal of the guidewire tube from the endoluminal device, the surface texture comprising one or more of: indentations, lines, dimples, or crosshatches.

2 . The system of claim 1 , wherein the proximal opening into the lumen of the introducer sheath is defined by a hemostatic valve.

3 . The system of claim 1 , further comprising a guidewire received in the lumen of the guidewire tube.

4 . The system of claim 1 , further comprising a constraint releasably maintaining the endoluminal device in the delivery profile.

5 . The system of claim 1 , wherein the enlarged feature includes a portion of the guidewire tube that defines an enlarged outer profile relative to a remaining portion of the guidewire tube.

6 . The system of claim 1 , wherein the enlarged feature includes at least one of a bead, a ring, a barb, a knob, and a catch.

7 . The system of claim 1 , wherein the enlarged feature is substantially teardrop shaped.

8 . The system of claim 1 , wherein the enlarged feature is positioned along a proximal portion of the guidewire tube.

9 . The system of claim 1 , wherein the enlarged feature defines a maximum diametric dimension that is greater than a maximum diametric dimension of adjacent portions of the guidewire tube by at least 10%, 20%, 30%, 40%, 50%, 60%, 100%, 200%, 300%, or more.

10 . The system of claim 1 , wherein the enlarged feature is attached around the guidewire tube.

11 . An endoluminal delivery system, comprising:

an introducer sheath having a proximal end, a distal end, a lumen extending between the proximal end and the distal end, and a proximal opening at the proximal end providing access to the lumen;

a delivery catheter configured to be passed through the proximal opening into the lumen of the introducer sheath;

an endoluminal device releasably maintained along the delivery catheter at a delivery profile that is configured for the endoluminal device to be passed through the proximal opening into the lumen of the introducer sheath while the endoluminal device is maintained in the delivery profile, the endoluminal device having an inner lumen, a first opening providing access to the inner lumen, and a second opening providing access to the inner lumen;

a guidewire tube removably received by the endoluminal device such that the guidewire tube is removable from the endoluminal device when the endoluminal device is in the delivery profile, the guidewire tube passing through the first opening of the endoluminal device into the inner lumen of the endoluminal device, and out of the second opening of the endoluminal device, the guidewire tube having a first end, a second end, and a lumen configured to receive a guidewire; and

an enlarged feature located at the guidewire tube such that a portion of the guidewire tube extends beyond an end of the enlarged feature, wherein the first end of the guidewire tube has a first end opening and the second end of the guidewire tube has a second end opening to provide access to the lumen of the guidewire tube, the enlarged feature selectively preventing insertion of the guidewire tube through the proximal opening of the introducer sheath into the lumen of the introducer sheath, and the enlarged feature having a surface texture configured to aid in removal of the guidewire tube from the endoluminal device, the surface texture comprising one or more of: indentations, lines, dimples, or crosshatches.

12 . An endoluminal delivery system, comprising:

an introducer sheath having a proximal end, a distal end, a lumen extending between the proximal end and the distal end, and a proximal opening at the proximal end providing access to the lumen;

a delivery catheter configured to be passed through the proximal opening into the lumen of the introducer sheath;

an endoluminal device releasably maintained along the delivery catheter at a delivery profile that is configured for the endoluminal device to be passed through the proximal opening into the lumen of the introducer sheath while the endoluminal device is maintained in the delivery profile, the endoluminal device having an inner lumen, a first opening providing access to the inner lumen, and a second opening providing access to the inner lumen;

a guidewire tube removably received by the endoluminal device such that the guidewire tube is removable from the endoluminal device when the endoluminal device is in the delivery profile, the guidewire tube passing through the first opening of the endoluminal device into the inner lumen of the endoluminal device, and out of the second opening of the endoluminal device, the guidewire tube having a first end with a first end opening, a second end with a second end opening, and a lumen configured to receive a guidewire; and

an enlarged feature located at a position between the first end and the second end of the guidewire tube, wherein the enlarged feature is configured to selectively prevent insertion of the guidewire tube through the proximal opening of the introducer sheath into the lumen of the introducer sheath while the first end opening and the second end opening of the guidewire tube provide access to the lumen of the guidewire tube, and the enlarged feature having a surface texture configured to aid in removal of the guidewire tube from the endoluminal device, the surface texture comprising one or more of: indentations, lines, dimples, or crosshatches.