WO2007123956A2 - Endovascular aortic repair delivery system with anchor - Google Patents

Endovascular aortic repair delivery system with anchor Download PDF

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Publication number
WO2007123956A2
WO2007123956A2 PCT/US2007/009498 US2007009498W WO2007123956A2 WO 2007123956 A2 WO2007123956 A2 WO 2007123956A2 US 2007009498 W US2007009498 W US 2007009498W WO 2007123956 A2 WO2007123956 A2 WO 2007123956A2
Authority
WO
WIPO (PCT)
Prior art keywords
prosthesis
elongated member
proximal
delivery system
anchor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2007/009498
Other languages
English (en)
French (fr)
Other versions
WO2007123956A3 (en
Inventor
Peter J. Pereira
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Boston Scientific Scimed Inc
Original Assignee
Scimed Life Systems Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Scimed Life Systems Inc filed Critical Scimed Life Systems Inc
Priority to EP07809017A priority Critical patent/EP2051671A2/en
Priority to CA002650068A priority patent/CA2650068A1/en
Priority to JP2009507730A priority patent/JP5226668B2/ja
Publication of WO2007123956A2 publication Critical patent/WO2007123956A2/en
Publication of WO2007123956A3 publication Critical patent/WO2007123956A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
    • A61F2002/9505—Instruments specially adapted for placement or removal of stents or stent-grafts having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument

Definitions

  • Endovascular Aortic Repair (EVAR) delivery systems typically delivers a prosthesis by a sheath retraction mechanism in which the prosthesis is held in place by a stabilizer within the delivery system while the sheath is being retracted.
  • a conventional EVAR delivery system thus typically transmits a compressive force to the prosthesis during deployment. Such a compressive force adds to the force required to retract the sheath and expose the prosthesis.
  • a delivery system for deploying a prosthesis in a body lumen, the prosthesis having a proximal end, a distal end, and a radially compressed configuration.
  • proximal refers to the end closer to an access location outside the body
  • distal refers to the end farther from the access location.
  • the delivery system has a proximal end and a distal end, and includes a primary elongated member positioned coax ⁇ ally within the prosthesis and having a proximal end and a distal end.
  • a secondary elongated member surrounds a portion of the primary elongated member and a portion of the secondary elongated member is positioned coaxially within the prosthesis.
  • the secondary elongated member has a proximal end and a distal end.
  • the delivery system further includes a proximal anchor attached to the secondary elongated member.
  • the anchor is adapted for engagement with the proximal end of the prosthesis, thereby maintaining the prosthesis in its radially compressed configuration.
  • At least one outer sheath is adapted to be retracted to expose the prosthesis while the prosthesis is maintained in its radially compressed configuration.
  • the primary elongated member and the secondary elongated member are axially movable relative to one another to disengage the prosthesis from the anchor and permit expansion of the radially compressed prosthesis.
  • Fig. IA is a plan view of a delivery system for deploying a prosthesis in a body lumen, shown with an outer sheath retracted to expose the prosthesis while the prosthesis is maintained in its radially compressed configuration;
  • Fig. IB is the delivery system as illustrated in Fig. IA shown with the proximal end of the prosthesis expanded and the distal end of the prosthesis maintained in its radially compressed configuration;
  • Fig. 1C is the delivery system as illustrated in Fig. IA shown with the proximal end of the prosthesis expanded and the distal end of the prosthesis expanded;
  • Fig. 2A is a plan view of another delivery system for deploying a prosthesis in a body lumen, shown with a proximal outer sheath and a distal outer sheath mated together while the prosthesis is maintained in its radially compressed configuration;
  • Fig. 2B is the delivery system as illustrated in Fig. 2A shown with the distal end of the prosthesis expanded and the proximal end of the prosthesis maintained in its radially compressed configuration;
  • Fig. 2C is the delivery system as illustrated in Fig . 2A shown with the proximal end of the prosthesis expanded and the distal end of the prosthesis expanded. . DETAILED DESCRIPTION OF THE INVEIMTION
  • a delivery system 10 for deploying a prosthesis 12 in a body lumen (not shown), prosthesis 12 having a proximal end 12P, a distal end 12D, and a radially compressed configuration, as illustrated in Fig. IA.
  • Delivery system 10 has a proximal end (not shown) and a distal end 1OD.
  • a tip 14 is attached or over molded at the distal end 1OD of delivery system 10, and a pusher handle (not shown) is located at the proximal end and remains outside the body lumen.
  • Delivery system 10 includes a primary elongated member 16 positioned coaxially within prosthesis 12 and having a proximal end (not shown) and a distal end 16D.
  • a secondary elongated member 18 surrounds a portion of primary elongated member 16 and a portion of secondary elongated member 18 is positioned coaxially within prosthesis 12.
  • Secondary elongated member 18 has a proximal end (not shown) and a distal end 18D.
  • Delivery system 10 further includes a proximal anchor 2OP attached to secondary elongated member 18, and a distal anchor 2OD attached to primary elongated member 16.
  • Proximal anchor 2OP is adapted for engagement with the proximal end of prosthesis 12P
  • distal anchor 2OD is adapted for engagement with the distal end of prosthesis 12D, thereby maintaining prosthesis 12 in its radially compressed configuration.
  • each of proximal anchor 2OP and distal anchor 2OD includes prongs 22 adapted for engagement with apertures 24 in prosthesis 12.
  • Prongs 22 of proximal anchor 2OP extend toward the proximal end of delivery system 10
  • prongs 22 of distal anchor 2OD extend toward the distal end 1OD of delivery system 10.
  • Prosthesis 12 may consist of, among other things, a self-expanding stent or a self-expanding stent-graft (as represented in Figs. IA - 1C). End portions 12P and 12D of stent-graft 12 represent wire end loops of the stent that are not covered by the graft. For clarity purposes, the stent portion covered by the graft of stent-graft 12 is not shown. Apertures 24 represent the openings within the wire end loops of the stent. As illustrated in Fig.
  • prongs 22 of proximal anchor 2OP and distal anchor 2OD are hooked through (i.e., engaged with) openings 24 within wire end loops 12P and 12D, respectively, of the stent of prosthesis 12.
  • Such engagement of anchors 2OP, 2OD with ends 12P, 12D, respectively, of prosthesis 12 maintains prosthesis 12 in its radially compressed configuration.
  • prongs 22 of anchors 2OP, 2OD effectively grab the ends 12P, 12D of prosthesis 12 to prevent prosthesis 12 from self-expanding.
  • An outer sheath 26 is adapted to be retracted to expose prosthesis 12 while prosthesis 12 is maintained in its radialty compressed configuration under tension between anchors 2OP, 2OD, as illustrated in Fig. IA.
  • Holding the prosthesis under tension minimizes radiat forces exerted on outer sheath 26 by the self-expanding stent and thus minimizes the frictional force between prosthesis 12 and outer sheath 26 that adds to the force required to retract outer sheath 26 and expose prosthesis 12.
  • Primary elongated member 16 and secondary elongated member 18 are axially movable relative to one another to disengage prosthesis 12 from anchors 2OP, 2OD and permit expansion of the radially compressed prosthesis 12, as illustrated in Fig. 1C.
  • each of primary elongated member 16 and secondary elongated member 18 comprises a hypotube or single lumen extrusion.
  • Primary elongated member 16 may guide delivery system 10 through the body lumen (not shown) over a guidewire (not shown) to the area to be repaired.
  • primary elongated member 16 and secondary elongated member 18 are not represented (with hidden lines) within outer sheath 26. It is to be understood, however, that secondary elongated member 18 extends proximally within outer sheath 26 to the pusher handle (not shown), and primary elongated member 16 extends proximally within secondary elongated member 18 to the pusher handle (not shown). It is at the pusher handle location that primary elongated member 16 and secondary elongated member 18 are axially manipulated relative to one another.
  • Secondary elongated member 18 includes a pilot portion 28 proximally adjacent proximal anchor 2OP to facilitate movement of anchor 2OP into outer sheath 26.
  • Pilot portion 28 is tapered toward its relatively smaller proximal end from a relatively larger cross section having an effective diameter greater than the effective diameter of anchor 2OP.
  • the shape of pilot portion 28 is not limited to hexagonal, as represented in Figs. IA - 1C, and may consist of a variety of shapes that taper to facilitate movement of anchor 2OP into outer sheath 26 (i.e., to prevent prongs 22 from getting caught on outer sheath 26 as anchor 2OP is moved into outer sheath 26).
  • delivery system 10 is initially in its pre-insertion configuration (not shown). More specifically, primary elongated member 16, secondary elongated member 18, proximal anchor 2OP, distal anchor 2OD, and prosthesis 12 are all loaded within outer sheath 26 such that only pilot tip 14 is protruding from outer sheath 26. In this configuration, delivery system 10 is inserted into the body lumen (not shown).
  • Outer sheath 26 is proximally retracted to expose prosthesis 12 while prosthesis 12 is maintained in its radially compressed configuration by anchors 2OP, 2OD, as illustrated in Fig. IA.
  • Secondary elongated member 18 is distally advanced to disengage the proximal end 12P of prosthesis 12 from proximal anchor 2OP to allow expansion of proximal end 12P of prosthesis 12, as illustrated in Fig. IB. More specifically, distal movement of secondary elongated member 18 causes prongs 22 to disengage apertures 24 of prosthesis 12, thereby releasing the compressive reaction force applied to the proximal end 12P of prosthesis 12 and allowing it to self-expand.
  • Primary elongated member 16 is proximally retracted to disengage the distal end 12D of prosthesis 12 from distal anchor 2OD to allow expansion of the distal end 12D of prosthesis 12, as illustrated in Fig. 1C. More specifically, proximal movement of primary elongated member 16 causes prongs 22 to disengage apertures 24 of prosthesis 12, thereby releasing the compressive force applied to the distal end 12D of prosthesis 12 and allowing it to self-expand.
  • Proximal anchor 2OP and distal anchor 2OD are secured inside outer sheath 26 (not shown). More specifically, secondary elongated member 18 is typically proximally retracted into outer sheath 26. As explained above, the tapered shape of pilot portion 28 facilitates movement of anchor 2OP into outer sheath 26 by preventing prongs 22 of proximal anchor 2OP from getting caught on outer sheath 26 as anchor 2OP is moved into outer sheath 26. Primary elongated member 16 is also typically proximally retracted into outer sheath 26. Because prongs 22 of distal anchor 2OD extend toward the distal end 1OD of delivery system 10 (i.e., away from outer sheath 26), distal anchor 2OD slides easily into outer sheath 26.
  • Delivery system 10 is returned to its pre-insertion configuration
  • FIGs. 2A - 2B illustrate an alternative exemplary configuration of a delivery system 110 for deploying a prosthesis 112 in a body lumen (not shown).
  • delivery system 110 includes only one anchor, proximal anchor 120P.
  • delivery system 110 includes prosthesis 112 having a proximal end 112P, a distal end 112D, and a radially compressed configuration, as illustrated in Fig. 2A.
  • Delivery system 110 has a proximal end (not shown) and a distal end HOD.
  • a tip 114 is attached or over molded at the distal end HOD of delivery system 110, and a pusher handle (not shown) is located at the proximal end and remains outside the body lumen.
  • Delivery system HO includes a primary elongated member 116 positioned coaxially within prosthesis 112 and having a proximal end (not shown) and a distal end 116D.
  • a secondary elongated member 118 surrounds a portion of primary elongated member 116 and a portion of secondary elongated member 118 is positioned coaxially within prosthesis 112.
  • Secondary elongated member 118 has a proximal end (not shown) and a distal end 118D.
  • Delivery system HO further includes a proximal anchor 120P attached to secondary elongated member 118.
  • Proximal anchor 120P is adapted for engagement with the proximal end of prosthesis 112P, thereby maintaining the proximal end 112P of prosthesis 112 in its radially compressed configuration.
  • proximal anchor 120P includes prongs 122 adapted for engagement with apertures 124 in prosthesis 112. Prongs 122 of proximal anchor 120P extend toward the proximal end of delivery system 110.
  • prosthesis 112 may consist of, among other things, a self-expanding stent or a self- expanding stent-graft (as represented in Figs. 2A - 2C). For clarity purposes, the stent portion covered by the graft of stent-graft 112 is not shown. As illustrated in Figs. 2A and 2B, prongs 122 of proximal anchor 120P are hooked through (i.e., engaged with) openings 124 within wire end loops 112P and 112D, respectively, of the stent of prosthesis 112.
  • anchor 120P Such engagement of anchor 120P with end 112P of prosthesis 112 maintains the proximal end 112P of prosthesis 112 in its radially compressed configuration.
  • prongs 122 of anchor 120P effectively grab the proximal end 112P of prosthesis 112 to prevent the proximal end 112P of prosthesis 112 from self-expanding.
  • a distal outer sheath 126D mates with a proximal outer sheath 126P, as illustrated in Fig. 2A.
  • Distal outer sheath 126D is adapted to be advanced to expose prosthesis 112 and allow expansion of distal end 112D of prosthesis 112, while proximal end 112P of prosthesis 112 is maintained in its radially compressed configuration, as illustrated in Fig. 2B.
  • Primary elongated member 116 and secondary elongated member 118 are axially movable relative to one another to disengage prosthesis 112 from anchor
  • each of primary elongated member 116 and secondary elongated member 118 comprises a hypotube or single lumen extrusion.
  • Primary elongated member 116 may guide delivery system 110 through the body lumen (not shown) over a guidewire (not shown) to the area to be repaired.
  • primary elongated member 116 is not shown within proximal outer sheath 126P.
  • secondary elongated member 118 is not shown within proximal outer sheath 126P in Fig. 2C. It is to be understood, however, that secondary elongated member 118 extends proximally within proximal outer sheath 126P to the pusher handle (not shown), and primary elongated member 116 extends proximally within secondary elongated member 118 to the pusher handle (not shown). It is at the pusher handle location that primary elongated member 116 and secondary elongated member 118 are axially manipulated relative to one another.
  • secondary elongated member 118 includes a pilot portion 128 proximally adjacent proximal anchor 120P to facilitate movement of anchor 120P into proximal outer sheath 126P.
  • delivery system 110 is initially in its pre-insertion configuration, as shown in Fig. 2A. More specifically, a portion of primary elongated member 116, proximal anchor 120P, and prosthesis 112 are loaded within distal outer sheath 126D with pilot tip 114 protruding from distal outer sheath 126D. A substantial portion of secondary elongated member 118 is loaded within proximal outer sheath 126P. Proximal outer sheath 126P and distal outer sheath 126D are mated. In this configuration, delivery system 110 is inserted into the body lumen (not shown).
  • Distal outer sheath 126D is distally advanced away from mating proximal outer sheath 126P to expose prosthesis 112 to allow expansion of the distal end 112D of prosthesis 112 while the proximal end 112P of prosthesis 112 is maintained in its radially compressed configuration by proximal anchor 120P, as illustrated in Fig. 2B.
  • Secondary elongated member 118 is distally advanced to disengage the proximal end 112P of prosthesis 112 from proximal anchor 120P to allow expansion of the proximal end 112P of prosthesis 112, as illustrated in Fig. 2C.
  • Proximal anchor 120P is secured inside proximal outer sheath 126P (not shown). More specifically, secondary elongated member 118 is typically proximaily retracted into proximal outer sheath 126P. As explained above with reference to delivery system 10 of Figs. IA - 1C, the tapered shape of pilot portion 128 facilitates movement of anchor 120P into proximal outer sheath 126P by preventing prongs 122 from getting caught on proximal outer sheath 126P as anchor 120P is moved into proximal outer sheath 126P. Primary elongated member 116 is also typically proximaily retracted into proximal outer sheath 126P. Distal outer sheath 126D is mated with proximal outer sheath 126P.
  • Delivery system 110 is returned to its pre-insertion configuration (described above) but without prosthesis 112, and is removed from the body lumen (not shown) .
  • An exemplary material for forming primary elongated member 16, 116, secondary elongated member 18, 118, proximal anchor 2OP, 120P, distal anchor 2OD, and prongs 22 is stainless steel.
  • the present invention is not limited to this material, and may include any materials, including, for example, metallic (titanium, for example) or non-metallic (a polymer or other composite material, for example) materials that offer desired properties including both strength and flexibility.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Cardiology (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
PCT/US2007/009498 2006-04-24 2007-04-19 Endovascular aortic repair delivery system with anchor Ceased WO2007123956A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP07809017A EP2051671A2 (en) 2006-04-24 2007-04-19 Endovascular aortic repair delivery system with anchor
CA002650068A CA2650068A1 (en) 2006-04-24 2007-04-19 Endovascular aortic repair delivery system with anchor
JP2009507730A JP5226668B2 (ja) 2006-04-24 2007-04-19 アンカを持つ大動脈修復部材血管内送達システム

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/409,579 US20070250151A1 (en) 2006-04-24 2006-04-24 Endovascular aortic repair delivery system with anchor
US11/409,579 2006-04-24

Publications (2)

Publication Number Publication Date
WO2007123956A2 true WO2007123956A2 (en) 2007-11-01
WO2007123956A3 WO2007123956A3 (en) 2007-12-13

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PCT/US2007/009498 Ceased WO2007123956A2 (en) 2006-04-24 2007-04-19 Endovascular aortic repair delivery system with anchor

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US (1) US20070250151A1 (enExample)
EP (1) EP2051671A2 (enExample)
JP (2) JP5226668B2 (enExample)
CA (1) CA2650068A1 (enExample)
WO (1) WO2007123956A2 (enExample)

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