Delivery device with an expandable positioner for positioning a prosthesis

Patent metadata

Field	Value
Publication number	US-2016158045-A1
Application number	US-201514925597-A
Country	US
Kind code	A1
Filing date	Oct 28, 2015
Priority date	Dec 8, 2014
Publication date	Jun 9, 2016
Grant date	—

Abstract

A prosthesis delivery device comprises a cannula having an expandable positioning device disposed at the proximal end thereof. A prosthesis is retained on the cannula distal of the expandable device. Expansion of the expandable device retains and centers the delivery device and the prosthesis carried thereon in the vessel and allows repositioning of the prosthesis without contacting the proximal end of the prosthesis with the vessel walls prior to deployment.

First claim

1 . A prosthesis delivery device comprising:
a delivery cannula having at least one lumen extending there through and a proximal end; a nose cone dilator disposed at the proximal end of the delivery cannula, and an opening formed in a wall of the nose cone dilator, wherein the opening is in flow communication with the at least one cannula lumen; an expandable positioner disposed about the opening formed in the wall of the nose cone dilator, the expandable positioner comprising a wall defining an interior space, wherein the interior space of the expandable positioner is in flow communication with the at least one cannula lumen via the opening formed in the wall of the nose cone, wherein the positioner comprises a radially expanded condition and a radially contracted condition; and wherein flowing a fluid proximally through the at least one cannula lumen, through the opening formed in the wall of the nose cone dilator, and into the interior space of the positioner moves the positioner from the contracted condition to the expanded condition.

2 . The delivery device of claim 1 wherein the expandable positioner comprises an inflatable device.

3 . The delivery device of claim 1 wherein the expandable positioner comprises a balloon.

4 . The delivery device of claim 2 wherein the at least one lumen is in flow communication with the inflatable device.

5 . The delivery device of claim 1 wherein the expandable positioner comprises a proximal end and a distal end, and wherein the proximal and distal ends of the positioner are secured to an outer surface of the nose cone dilator.

6 . The delivery device of claim 1 further comprising a prosthesis carried on the delivery cannula.

7 . The delivery device of claim 6 wherein the prosthesis comprises a stent graft comprising a proximal bare stent.

8 . The delivery device of claim 7 wherein the proximal bare stent comprises at least one anchoring mechanism configured to engage a vessel wall.

9 . The delivery device of claim 8 wherein the at least one anchoring mechanism of the bare stent is prevented from engaging a vessel wall when the positioner is in an expanded configuration.

10 . A prosthesis delivery device comprising:
a delivery cannula having a longitudinal axis and an expandable proximal region, the expandable proximal region comprising a proximal end and a distal end and a plurality of expandable wings extending between the proximal and distal ends; wherein the expandable wings comprise a radially outwardly expanded condition and a radially inwardly contracted condition, and wherein the expandable wings are expanded radially outwardly by urging together the proximal and distal ends of the expandable proximal region along the longitudinal axis.

11 . The delivery device of claim 10 wherein the expandable proximal region comprises a malecot.

12 . The delivery device of claim 10 further comprising a prosthesis retained on the delivery cannula, wherein the prosthesis has a proximal end releasably attached to the cannula.

13 . The delivery device of claim 12 wherein the prosthesis comprises a stent graft comprising a proximal bare stent.

14 . The delivery device of claim 13 wherein the proximal bare stent comprises at least one anchoring mechanism configured to engage a vessel wall.

15 . The delivery device of claim 14 wherein the at least one anchoring mechanism of the bare stent is prevented from engaging a vessel wall when the expandable proximal region is in an expanded configuration.

16 . A method of delivering a prosthesis comprising:
introducing a delivery device into a vessel, the delivery device comprising a delivery cannula having at least one lumen extending there through and a proximal end, a nose cone dilator disposed at the proximal end of the delivery cannula, a radially expandable positioner disposed about a portion of the nose cone, a prosthesis carried on the delivery cannula distal to the radially expandable positioner, a retractable sheath disposed about the prosthesis; flowing fluid through the at least one lumen to expand the expandable positioner; positioning the delivery device in the vessel; retracting the sheath to expose at least a proximal end of the prosthesis; releasing the proximal end of a prosthesis from the delivery cannula; and releasing the distal end of the prosthesis from the delivery cannula.

17 . The method of claim 16 further comprising withdrawing the delivery device from the vessel.

18 . A method of delivering a prosthesis comprising
introducing a delivery device into a vessel, the delivery device comprising a delivery cannula having a first lumen extending there through and a proximal end, a nose cone dilator disposed at the proximal end of the delivery cannula, a radially expandable positioner disposed distally of the nose cone, a prosthesis carried on the delivery cannula distal to the radially expandable positioner, a retractable sheath disposed about the prosthesis; expanding the positioner to position the delivery device in the vessel; retracting the sheath to expose at least a portion of the prosthesis; releasing a proximal end of a prosthesis from the delivery cannula; releasing the distal end of the prosthesis from the delivery cannula.

19 . The method of claim 18 wherein the radially expandable positioner comprises a malecot having a proximal end and a distal end.

20 . The method of claim 18 wherein the delivery cannula further comprises a second cannula coaxial with and longitudinally moveable relative to the delivery cannula.

21 . The method of claim 20 wherein the proximal end of the expandable positioner is attached to the second cannula and the distal end of the expandable positioner is attached to the delivery cannula and wherein the method further comprises moving the second cannula distally to urge the proximal and distal ends of the positioner towards each other thereby expanding the expandable positioner.

Assignees

• Cook Medical Technologies Llc

Inventors

• Havel William J
• Huser Matt
• Kratzberg Jarin
• Ringenberger Kimberly

Classifications

• A61F2/958 Primary

  Inflatable balloons for placing stents or stent-grafts · CPC title

• A61F2/86

  Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure · CPC title

• A61F2/95

  Instruments specially adapted for placement or removal of stents or stent-grafts · CPC title

• A61F2/966

  with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod · CPC title

• A61F2/9662 Primary

  the middle portion of the stent or stent-graft is released first · CPC title