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US 2016/0250023 A1Published application
Infundibular reducer device delivery system and related methods
AssigneeMedtronic Vascular, Inc.
InventorsNasser Rafiee, Morgan House, Nareak Douk, Philipp Bonhoeffer
Life of this patent
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Abstract
Described is a delivery system for minimally invasive delivery of a self-expandable stent to a body lumen, and particularly delivery of a prosthetic valve to the right ventricular outflow tract. Also described is a method of loading a stent onto such a delivery system, and a method of delivering a self-expandable stent to a desired anatomic site.
Claims10
1-9. (canceled)
10:
- A method of loading a device onto a delivery system, the method comprising the steps of:
- receiving a self-expanding device having a proximal end and a distal end, a central lumen there through, and a plurality of attachment members located at or near the proximal end;
- receiving a delivery system comprising a loading rail having two free ends, an elongated inner catheter having a proximal end and a tapered distal end, an elongated holding catheter having a proximal end and a distal end comprising a coil for attachment to the device and a center lumen passing there through to slidably maintain the inner catheter and the coil, and an elongated outer sheath having a proximal and a distal end and a center lumen passing there through;
- extending the inner catheter through the lumen of the holding catheter and extending both the inner catheter and holding catheter through the lumen of the outer sheath;
- threading the plurality of attachment members onto the loading rail;
- connecting one free end of the loading rail to the coil on the holding catheter;
- advancing the plurality of attachment members along the loading rail and onto the coil, wherein the advancing procedure partially collapses the device;
- removing the loading rail from the coil after all of the attachment members are transferred to the coil;
- collapsing the device in the outer sheath by sliding outer sheath over the stent;
- and
- enclosing the collapsed device by retracting the inner catheter proximally and pulling the distal tapered end into the distal end of the outer sheath.
8 more elements
11:
- The method of claim 10, wherein the plurality of attachment members comprise loops.
12:
- The method of claim 10, wherein the device is a prosthetic valve further comprising a replacement valve that is attached to the device within the central lumen.
13:
- A method of delivering a self-expandable device to a desired anatomic site, the method comprising the steps of:
- receiving a delivery system comprising:
- a device having a proximal end and a distal end and a central lumen there through, and a plurality of attachment members at the proximal end;
- an elongated inner catheter having a proximal end and a tapered, distal end for insertion into a body lumen;
- an elongated holding catheter having a proximal end and a distal end and a center lumen that slidably maintains the inner catheter passing there through, and a coil on the distal end attached to the plurality of attachment members on the device;
- and
- an elongated outer sheath having a proximal and a distal end and a center lumen passing there through slidably and rotatably maintaining the holding catheter and inner catheter, the distal, tapered end of the inner catheter maintained in the distal end of the outer sheath, and holding and enclosing the device in a collapsed configuration for delivery to a desired anatomic site;
- advancing the delivery system intraluminally toward the anatomic site;
- upon reaching the anatomic site, retracting the outer sheath to allow the stent to partially expand;
- rotating the holding catheter in order to release the attachment members of the device from the coil and allowing the device to expand, thereby releasing the device from the delivery system;
- and
- removing the delivery system from the anatomic site.
9 more elements
14:
- The method of claim 13, wherein the device further comprises a replacement valve connected to the device in the central lumen of the device.
15:
- The method of claim 14, wherein the plurality of attachment members comprise loops.
16:
- The method of claim 13, wherein the delivery system further comprises dye injection ports through which dye may flow from the system to the anatomic site, and further comprising the step of delivering dye through the dye injection ports.
17:
- The method of claim 16, wherein the dye is delivered under visualization.
18:
- The method of claim 17, wherein visualization is achieved by using a procedure chosen from the group consisting of fluoroscopy, echocardiography, intravascular ultrasound, angioscopy and real-time magnetic resonance imaging.