Apparatus and method for deployment of an endoluminal device
View Patent ↗An introducer deploys an endoluminal device in a distal location from a proximal location. The introducer comprises a retrograde portion, an anterograde portion axially moveable relative to the retrograde portion, a shaft having a distal tip and an anterograde sheath attached to the distal tip, and an inflatable balloon mounted radially outside the retrograde portion for anchoring the device during deployment from its proximal end to its distal end. The retrograde portion may comprise bilumen tubing having an external wall, an internal wall that defines a central lumen radially inward of the internal wall, and an annular lumen in fluid communication with the balloon defined between the external wall and the internal wall.
1. A method for deployment of an endoluminal device in a distal location in a body lumen from a proximal location, the method comprising the steps of:
(a) inserting an introducer into the body lumen having a lumen wall, the introducer comprising a retrograde portion, an anterograde portion comprising a distal tip and an anterograde sheath attached proximally to the distal tip, a shaft attached to the distal tip and extending concentrically through a central lumen defined by the anterograde portion and retrograde portion, an endoluminal device mounted concentrically over the shaft in the central lumen and having a distal end contained by the anterograde portion and a proximal end contained by the retrograde portion, and an inflatable balloon mounted radially outside the retrograde portion for anchoring the endoluminal device during deployment of the device;
(b) aligning the proximal end of the device in a deployment location;
(c) retracting the retrograde portion to allow a proximal portion including the proximal end of the endoluminal device to deploy;
(d) advancing the retrograde portion so that the balloon is aligned axially within the proximal portion of the device;
(e) inflating the balloon to compress the proximal portion of the endoluminal device against the lumen wall; and
(f) extending the shaft to distally advance the anterograde sheath to deploy a remaining portion of the endoluminal device.
2. The method of claim 1 , wherein the introducer shaft comprises at least one radiopaque marker marking the proximal end of the device and in which step (b) comprises determining the alignment of the proximal end in the deployment location using fluoroscopy to visualize the radiopaque marker.
3. The method of claim 1 , further comprising the steps of:
(g) deflating the balloon; and
(h) removing the introducer from the body lumen.
4. The method of claim 3 , further comprising, prior to step (h), using the balloon to model the endoluminal device against the body lumen.
5. The method of claim 1 , wherein the endoluminal device is adapted for deployment in a location having a sensitive area located distally of the deployment location, the method comprising in step (f) advancing the shaft a distance insufficient for the anterograde portion to intrude into the sensitive area.
6. The method of claim 5 , wherein the endoluminal device comprises a stent, graft, or combination thereof for deployment in an aorta, and the sensitive area comprises a heart.