WO2019040440A1 - Système pour occlusion d'appendice auriculaire gauche - Google Patents

Système pour occlusion d'appendice auriculaire gauche Download PDF

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Publication number
WO2019040440A1
WO2019040440A1 PCT/US2018/047233 US2018047233W WO2019040440A1 WO 2019040440 A1 WO2019040440 A1 WO 2019040440A1 US 2018047233 W US2018047233 W US 2018047233W WO 2019040440 A1 WO2019040440 A1 WO 2019040440A1
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WO
WIPO (PCT)
Prior art keywords
positioning device
atrial appendage
implant
cuff
expandable cuff
Prior art date
Application number
PCT/US2018/047233
Other languages
English (en)
Inventor
Niv Ad
Original Assignee
Niv Ad
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
Priority claimed from US15/681,812 external-priority patent/US10631868B2/en
Application filed by Niv Ad filed Critical Niv Ad
Publication of WO2019040440A1 publication Critical patent/WO2019040440A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
    • A61B17/12009—Implements for ligaturing other than by clamps or clips, e.g. using a loop with a slip knot
    • A61B17/12013—Implements for ligaturing other than by clamps or clips, e.g. using a loop with a slip knot for use in minimally invasive surgery, e.g. endoscopic surgery
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
    • A61B17/122—Clamps or clips, e.g. for the umbilical cord
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
    • A61B17/128—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord for applying or removing clamps or clips
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
    • A61B17/128—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord for applying or removing clamps or clips
    • A61B17/1285—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord for applying or removing clamps or clips for minimally invasive surgery
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
    • A61B2017/00238—Type of minimally invasive operation
    • A61B2017/00243—Type of minimally invasive operation cardiac
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/0046—Surgical instruments, devices or methods, e.g. tourniquets with a releasable handle; with handle and operating part separable
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/0046—Surgical instruments, devices or methods, e.g. tourniquets with a releasable handle; with handle and operating part separable
    • A61B2017/00473—Distal part, e.g. tip or head
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00477—Coupling
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00535—Surgical instruments, devices or methods, e.g. tourniquets pneumatically or hydraulically operated
    • A61B2017/00557—Surgical instruments, devices or methods, e.g. tourniquets pneumatically or hydraulically operated inflatable
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/30—Surgical pincettes without pivotal connections
    • A61B2017/306—Surgical pincettes without pivotal connections holding by means of suction

Definitions

  • Atrial fibrillation is a common cardiac rhythm disorder (“cardiac arrhythmia”) and is characterized by a rapid chaotic heartbeat in which the upper chambers of the heart known as the atria quiver rapidly instead of beating in a steady rhythm. This rapid quivering reduces the heart's ability to properly function as a pump.
  • Atrial fibrillation typically increases the risks of thrombo-embolic stroke and congestive heart failure. Quality of life is also impaired by common AF symptoms such as palpitations, chest pain, fatigue, and dizziness.
  • the irregular heartbeat associated with AF causes blood to pool in the left atrial appendage, allowing clots to accumulate over time. From time to time, clots may dislodge from the left atrial appendage, and may enter various circulation tracks causing strokes, myocardial infarction, limb ischemia, and other vascular problems.
  • LAA left atrial appendage
  • Embodiments of the invention are directed to epicardial implants that are designed to occlude the atrial appendage.
  • the implants described herein provide the ability to reposition the implant prior to expanding one or more expandable cuffs or balloons and are usable in open-chest and/or percutaneous applications.
  • an epicardial implant may include a positioning device that defines an open interior.
  • the positioning device may be configured to be detachably coupled with an implant delivery device such that the positioning device may be detached from the implant delivery device after the epicardial implant is in place about an atrial appendage.
  • the positioning device may include a first side, a second side, and a distal end that couples the first side and the second side.
  • the implant may also include at least one expandable cuff coupled with the positioning device.
  • the positioning device may be configured to selectively move the at least one expandable cuff toward and away from an atrial appendage to position the at least one expandable cuff in a desired position relative to the atrial appendage.
  • the at least one expandable cuff may be expandable into at least a portion of the open interior of the positioning device following placement of the at least one expandable cuff into the desired position.
  • the at least one expandable cuff may be configured to physically occlude a base of the atrial appendage when expanded.
  • an epicardial implant may include a catheter system that has a catheter body defining at least one lumen and a positioning device disposed within the catheter body.
  • the positioning device may define an open interior.
  • the positioning device may be configured to extend from a distal end of the catheter body.
  • the positioning device may be configured to be positioned such that at least portion of a base of an atrial appendage is disposed within the open interior.
  • the implant may also include at least one expandable cuff.
  • the positioning device may be configured to selectively move the expandable cuff toward and away from the atrial appendage to position the at least one expandable cuff in a desired position relative to the atrial appendage.
  • the at least one expandable cuff may be expandable into at least a portion of the open interior of the positioning device following placement of the at least one expandable cuff into the desired position.
  • the at least one expandable cuff may be configured to physically occlude a base of the atrial appendage when expanded.
  • a method for treating an atrial appendage may include providing an epicardial implant.
  • the epicardial implant may include a positioning device defining an open interior.
  • the positioning device may include a first side, a second side, and a distal end that couples the first side and the second side.
  • the implant may also include at least one expandable cuff that is expandable into at least a portion of the open interior of the positioning device.
  • the method may also include positioning the epicardial implant around an external surface of the atrial appendage such that a base of the atrial appendage is disposed in the open interior of the positioning device.
  • the method may further include expanding the at least one expandable cuff into the open interior of the positioning device to an extent sufficient to physically occlude the atrial appendage at the base.
  • Figure 1 is a schematic diagram of an atrial appendage occlusion device of the present invention
  • Figure 2 is an isolation view of a portion of the atrial appendage occlusion device illustrated in Figure 1;
  • Figure 2A is a top schematic view of a portion of the atrial appendage occlusion device illustrated in Figures 1 and 2 in an open condition;
  • Figure 2B is a top schematic view of a portion of the atrial appendage occlusion device illustrated in Figures 1 and 2 in a closed condition;
  • Figure 3 is a schematic diagram of an atrial appendage occlusion device of the present invention engaged with a left atrial appendage;
  • Figure 3 A is a schematic view of an atrial appendage occlusion device engaged with a left atrial appendage in an open condition;
  • Figure 3B is a schematic view of an atrial appendage occlusion device engaged with a left atrial appendage in a closed condition
  • Figure 4A is an isolation view of a portion of the atrial appendage occlusion device illustrated in Figures 1 and 2 in an open condition;
  • Figure 4B is an isolation view of a portion of the atrial appendage occlusion device illustrated in Figures 1 and 2 in a closed condition;
  • Figure 5A is an isolation elevational view of a portion of the atrial appendage occlusion device illustrated in Figures 1 and 2;
  • Figure 5B is a schematic view of an atrial appendage occlusion device in engagement with a left atrial appendage;
  • Figure 5C is a schematic view of an atrial appendage occlusion device in engagement with a left atrial appendage
  • Figure 5D is a schematic view of an atrial appendage occlusion device m engagement with a left atrial appendage in a closed condition
  • Figure 5E is a schematic view of an atrial appendage occlusion device in occlusive engagement with a left atrial appendage
  • Figure 5F is a schematic view of an atrial appendage occlusion device with an implant portion separated from a delivery device.
  • Figure 6A depicts an isometric view of an epicardial implant system according to embodiments.
  • Figure 6B depicts a top view of the epicardial implant system of Figure 6A in an open state according to embodiments.
  • Figure 6C depicts a top view of the epicardial implant system of Figure 6A in a closed state according to embodiments.
  • Figure 6D depicts an isometric view of a positioning device of the epicardial implant system of Figure 6 A according to embodiments.
  • Figure 6E depicts a bottom isometric view of the epicardial implant system of Figure 6 A in an unexpanded state according to embodiments.
  • Figure 6F depicts a front view of the epicardial implant system of Figure 6 A in an unexpanded state according to embodiments.
  • Figure 6G depicts a bottom isometric view of the epicardial implant system of Figure 6 A in an expanded state according to embodiments.
  • Figure 6H depicts a front view of the epicardial implant system of Figure 6 A in an expanded state according to embodiments.
  • Figure 61 depicts a top cross-sectional view of a quick release mechanism of the epicardial implant system of Figure 6 A according to embodiments.
  • Figure 6J depicts a top cross-sectional view of a quick release mechanism of the epicardial implant system of Figure 6 A according to embodiments.
  • Figure 6K depicts a top cross-sectional view of a quick release mechanism of the epicardial implant system of Figure 6 A according to embodiments.
  • Figure 6L depicts an isometric view of the epicardial implant system of Figure 6A with a delivery device and a positioning device disengaged from one another according to embodiments.
  • Figure 7A depicts an isometric view of an epicardial implant system according to embodiments.
  • Figure 7B depicts a top view of the epicardial implant system of Figure 7 A in an open state according to embodiments.
  • Figure 7C depicts a front cross-sectional view of a positioning device of the epicardial implant system of Figure 7A according to embodiments.
  • Figure 8A depicts a side cross-sectional view of an epicardial implant catheter system according to embodiments.
  • Figure 8B depicts a front cross-sectional view of the epicardial implant catheter system of Figure 8 A according to embodiments.
  • Figure 8B depicts a front cross-sectional view of the epicardial implant catheter system of Figure 8 A according to embodiments.
  • Figure 8C depicts a top view of the epicardial implant catheter system of Figure 8 A according to embodiments.
  • Figure 8D depicts a top view of the epicardial implant catheter system of Figure 8 A with a positioning device in an advanced position according to embodiments.
  • Figure 8E depicts a top view of the epicardial implant catheter system of Figure 8 A with a containment sheath removed according to embodiments.
  • Figure 8F depicts a top view of the epicardial implant catheter system of Figure 8 A with a support wire removed according to embodiments.
  • Figure 8G depicts a top view of the epicardial implant catheter system of Figure 8 A with a shape memory wire in a memory shape position according to embodiments.
  • Figure 8H depicts a top view of the epicardial implant catheter system of Figure 8 A with a cuff in an expanded state according to embodiments.
  • Figure 81 depicts a top view of the epicardial implant catheter system of Figure 8 A with a positioning device and cuff in a detached state according to embodiments.
  • Figure 9 is a flowchart depicting a process of occluding an atrial appendage according to embodiments.
  • Embodiments of the invention provide epicardial implants that are usable to physically occlude an atrial appendage in the treatment of atrial fibrillation.
  • the implants described herein may be usable in percutaneous procedures and/or open-chest procedures.
  • Delivery devices may be used to position epicardial implants around an atrial appendage.
  • a catheter delivery system may be used, while in some open-chest applications, a forceps-like delivery system may be used.
  • Each epicardial implant, or atrial appendage occlusion device may include a positioning device, or clamp, that defines an open interior between at least two sides and one or both of a proximal and distal end.
  • the positioning device may be configured to selectively move one or more expandable cuffs toward and away from an atrial appendage to position the expandable cuff(s) in a desired position relative to the atrial appendage.
  • the positioning device may be configured to be detachably coupled with an implant delivery device such that the positioning device may be detached from the implant delivery device after the epicardial implant is in place about an atrial appendage.
  • the positioning device may include a first side, a second side, and a distal end that couples the first side and the second side.
  • the positioning device may include two side prongs that are movably coupled with one another via a hinge.
  • the prongs may be positioned around a base of an atrial appendage and closed such that the prongs largely come together, oftentimes to a generally parallel (within 5° of parallel) state.
  • a distal end of the prongs may include a clasp or latch that may be used to close and secure the two prongs together.
  • the positioning device may include a support wire that forms a loop or hook which has a first side, a second side, and at least one end that together define an open interior of the positioning device.
  • the open interior of the support wire is expandable for positioning about the base of the atrial appendage.
  • the positioning device may also include a shape memory wire.
  • the support wire may be manipulated (using a guide wire) to a position in which an outer periphery of the support wire encircles at least a portion of the base of the atrial appendage. The support wire may then be removed, enabling the shape memory wire to rebound to a preset shape that is configured to close the open interior of the positioning device around the base of the atrial appendage.
  • the implant may also include one or more expandable cuffs that are each coupled with the positioning device.
  • the expandable cuff is a balloon that is inflatable by introducing a fluid into an interior of the balloon.
  • the expandable cuff may be expandable into at least a portion of the open interior of the positioning device following placement of the expandable cuff into the desired position.
  • the expandable cuff may be configured to physically occlude a base of the atrial appendage when expanded.
  • an atrial appendage occlusion device 10 includes a multiple lumen delivery device 12, such as a steerable catheter, as is well known in the art.
  • delivery device 12 includes first and second lumens 14, 16 for simultaneously delivering a plurality of devices to, for example, the left atrial appendage (LAA) 20 of a left atrium 22 of a human heart.
  • LAA left atrial appendage
  • a grasping device 18 may be delivered through first lumen 14, while an implant 24 may be delivered through second lumen 16 of delivery device 12.
  • One aspect of the present invention provides for laparoscopic/percutaneous transport of delivery device 12 to LAA 20.
  • delivery device 12 is a distally steerable catheter for minimally invasive introduction to the pericardial space through the pleural or sub- xiphoid spaces using a sel dinger technique.
  • implant 24 of the present invention may be delivered to the LAA without the need for midsternotomy.
  • the device 10 of the present invention may be useful for direct access to the LAA in cases where the patient is undergoing a midsternotomy for other surgical procedures. In either scenario, device 10 is arranged for an epicardial treatment of the LAA.
  • delivery device 12 may be compatible with imaging scopes which may be introduced through a selected lumen 14, 16 thereof.
  • the device of the present invention is arranged to occlude, for example, LAA 20 by pinching, cinching, crimping, clamping, compressing, or otherwise closing base 26 of LAA 20.
  • closing or "occluding" LAA 20 at base 26 is
  • occlusion is of a character to cut off nutrient-providing blood supply to the tissue of LAA 20, thereby eventually resulting in necrosis and/or obliteration of LAA 20.
  • a means for effectuating occlusion of LAA 20 is implant 24, which may be detachably secured to delivery device 12 to remain indefinitely after delivery device 12 is removed from the patient.
  • a grasping device 18 may be employed to grasp and releasably hold LAA 20 to facilitate positioning and engagement of implant 24 at LAA 20.
  • Grasping device 18 may typically comprise a conventional grasping tool, such as a suction tube which establishes negative pressure at a distal end 19 thereof, the negative pressure being suitable to releasably retain tissue, such as LAA 20 at distal end 19.
  • Alternative grasping tools include thoracoscopic forceps and the like.
  • FIG. 2 An enlarged view of implant 24 is illustrated in Figure 2, wherein implant 24 includes a clamp 32 and an inflatable cuff 34 attached to clamp 32.
  • clamp 32 is selectively adjustable between an open, undamped condition 36 (as illustrated in Figure 2), and a closed, clamped position 38.
  • Applicant contemplates a variety of mechanisms for selectively adjusting clamp 22 between the open and closed conditions 36, 38.
  • implant 24 may utilize a control arm 40, which incorporates the dual purpose of physically manipulating the spatial position of clamp 32, as well as selectively adjusting clamp 32 between open and closed conditions 36, 38.
  • An example mechanism for effectuating such selective adjustment is illustrated in Figures 2 A and 2B.
  • control arm 40 includes actuators 42, 44, which are detachably secured to clamp 32 at securement points 46.
  • First and second actuators 42, 44 may be proximally controlled to move relative to one another generally along directions 48, 50 so as to adjust clamp 32 between open and closed conditions 36, 38.
  • First and second actuators 42, 44 are also capable of rotating clamp 32 about an axis 52, and for turning clamp 32 into alignment with LAA 20. Such alignment enables first and second prongs 60, 62 to be placed at least partially about LAA 20.
  • control arm 40 may include a detachable link 54 which may be severed, opened, or otherwise released so as to disengage clamp 32 from control arm 40.
  • implant 24 may be positioned at LAA 20 through thoracoscopic or fluoroscopic guidance.
  • Figure 3 illustrates an engagement of implant 24 with LAA 20.
  • Implant 24 may be manipulated by, for example, first and second actuators 42, 44, so that first and second prongs 60, 62 of clamp 32 are positioned at substantially opposed sides 68,70 of LAA 20, and about at least a portion of LAA 20.
  • LAA 20 includes a lumen 21 defined by inner surface 28.
  • Implant 24 is engaged with LAA 20 initially while in an open condition 36, with first and second prongs 60, 62 of clamp 32 being positioned at substantially opposed sides 68, 70 of LAA 20.
  • lumen 21 of LAA 20 may be substantially closed through the pressing together of opposed sides 68, 70 of LAA 20 to an extent that inner surface 28 is in contact with itself.
  • the placement of clamp 32 in closed condition 38 may occlude LAA 20 by completely closing lumen 21.
  • clamp 32 primarily serves as an anchoring element for inflatable cuff 34, such that inflatable cuff 34 is positioned and oriented to physiologically occlude LAA 20 at base 26.
  • clamp 32 may be selectively adjusted between open and closed positions 36, 38 to not only anchor implant 24 at LAA 20, but to also facilitate the repositioning of implant 24 at LAA 20.
  • imaging techniques such as fluoroscopy and echocardiography may be utilized to assess whether inflatable cuff 34 is properly positioned to physiologically occlude LAA 20 at base 26.
  • an adjustment mechanism such as first and second actuators 42, 44 of control arm 40 may reopen clamp 32 from closed condition 38 to open condition 36, and thereafter reposition clamp 32 at LAA 20.
  • clamp 32 may again be modified from open condition 36 to closed condition 38 to securely anchor implant 24 at LAA 20.
  • Such adjustability of clamp 32, and correspondingly implant 24, is facilitated through the detachable connection of control arm 40 to clamp 32.
  • the detachable connection as described above, enables proximal control to repeatedly adjust clamp 32 between open and closed conditions 36, 38, including from open condition 36 to closed condition 38, and from closed condition 38 to open condition 36.
  • Such adjustment of clamp 32 may be repeated several times if necessary to appropriately position and orient implant 24 at LAA 20.
  • Clamp 32 may be fabricated from a variety of biocompatible materials, such as stainless steel, titanium, and other metallic, alloy, and non-metallic materials. In some embodiments, clamp 32 may be formed of a resilient material, thereby continuing to apply direct pressure to LAA 20 enclosed within clamp 32 in closed condition 28. Because clamp 32 primarily serves as an anchoring device, clamp 32 need not be of specific structural capacity, and may therefore exhibit a relatively low profile for ease of delivery and placement at LAA 20. [0068] As illustrated in Figures 4A and 4B, clamp 32 includes first and second prongs 60, 62 emanating from central portion 61.
  • First and second prongs 60, 62 may be the same or different curvatures forming various shapes, including an opening with tapered ends, oval, ovoid, crescent, etc.
  • Prong length "L” may be equal or different as between first and second prongs 60, 62, and may be provided in various sizes as physiologically appropriate.
  • prong length "L” may be between about 1-5 cm, though other sizes are contemplated as being useful in the present invention.
  • prong thickness "T" may be even or uneven along first and second prongs 60, 62, and may be between, for example, about 0.1-5 mm.
  • Clamp 32 may also include tissue engaging projections and fasteners, such as spikes, staples, rivets, sutures, and clips extending from one or both of first and second prongs 60, 62.
  • the tissue fasteners may be formed of a resilient, elastic, superelastic, metallic, alloy, or non- metallic material.
  • the tissue fasteners may be integrally formed with clamp 32, mounted within clamp 32, or mounted within a device that may be attached to clamp 32.
  • the repositionability of clamp 32 is advantageous for precisely positioning inflatable cuff 34 at LAA 20, such that inflation of cuff 34 physiologically occludes LAA 20 at base 26.
  • the term “physiologically occludes” is intended to mean the substantially complete closure or occlusion of lumen 21 of LAA 20 to an extent appropriate to prevent the formation of clot and the release of emboli from the appendage. Therefore, “physiological occlusion” may include any closure of LAA 20 which is effective in the prevention of clot formation and the release of emboli therefrom, and need not comprise the closure of the entirety of lumen 21 of LAA 20.
  • “physiologically occludes” may refer to a closure of lumen 21 at or near base 26 with such closure constituting intimate contact of inner surface 28 at or near base 26 to an extent appropriate to prevent blood flow into and out from LAA 20.
  • Inflatable cuff 34 includes one or more portions 70A, 70B that may be selectively inflated with a fluid, such as saline, to inwardly press upon LAA 20 to an extent appropriate to physiologically occlude LAA 20.
  • implant 24 includes a fluid supply tube 78 that is detachably secured to inflatable cuff 34.
  • Fluid supply tube 78 may be configured for selectively conveying pressurized fluid such as saline to inflatable cuff 34 through a one way valve 80 which permits fluid flow into, but not out from, inflatable cuff 34.
  • Fluid supply tube 78 is preferably deliverable along with implant 24 through a lumen 16 of delivery device 12.
  • inflatable cuff 34 defines one or more balloon structures defining respective portions 70A, 70B, with the balloon structures employing a resiliently elastic skin which may be resiliently expanded upon inflating fluid flow from fluid supply tube 78 into respective chambers thereof.
  • inflatable cuff 34 may include relatively rigid outer walls 35 with relatively elastic and non-rigid inner walls 37. In such a manner, inflation of inflatable cuff 34 causes expansion of inflatable cuff 34 inwardly along direction arrows 39. Such inward expansion of inflatable cuff 34 effectuates the occlusion of LAA 20.
  • Inflatable cuff 34 may be fabricated from a variety of materials to provide the functionality described above.
  • inflatable cuff 34 may include a skin layer 82 which is manufactured from one or more materials to provide zoned characteristics.
  • a first material for skin layer 82 may be substantially rigid at outer surface 35, while a different material may be provided at an inner surface 37.
  • reinforcement materials or devices may be employed to promote inward expansion of cuff 34 upon inflation thereof. Such reinforcement materials or devices may be disposed at or adjacent to outer surface 35 of inflatable cuff 34 to limit outwardly-directed expansion.
  • Inflatable cuff 34 may be secured to clamp 32 at one or more points along clamp 32. In some embodiments, inflatable cuff 34 is secured to the entire length of clamp 32. In other embodiments, however, inflatable cuff 34 may extend only partially along clamp 32, and may include discontinuous portions along clamp 32. A variety of securement mechanisms are contemplated by the present invention to secure inflatable cuff 34 to clamp 32. Example mechanisms include adhesives, fasteners, and other mechanisms, including conventional mechanisms for securing inflatable cuff 34 to clamp 32. [0075] Inflatable cuff 34 may include one or more distinct chambers that are sequentially or simultaneously filled with inflation fluid supplied through fluid supply tube 78. In one
  • inflatable cuff 34 may include a plurality of chambers which are filled through an "overflow" concept in which a secondary chamber is filled only after a primary chamber is completely filled with fluid.
  • each portion 70A, 70B of inflatable cuff 34 may be filled with between about 1-10 cc of fluid.
  • FIG. 5B-5E An occlusion sequence utilizing implant 24 is illustrated in Figures 5B-5E, in which implant 24 is placed about LAA 20 in an open condition 36. Positioning of implant 24 at LAA 20 may be verified through echocardiography and fluoroscopy. Figure 5B illustrates an improper positioning of implant 24, in that inflatable cuff 34 does not extend to base 26 of LAA 20, where occlusion is desired. In one embodiment, clamp 32 may be adjusted to a closed condition 38 at the position illustrated in Figure 5B, followed by position verification through echocardiography and/or fluoroscopy. When it is determined that the position and/or orientation of implant 24 is incorrect, clamp 32 may be re-adjusted to an open condition 36 for re-positioning of implant 24. as described above.
  • Implant 24 may be re-positioned, as illustrated in Figure 5C.
  • inflatable cuff 34 extends substantially to base 26 of LAA 20. Confirmation of such appropriate position and orientation may be performed, for example, subsequent to adjustment of clamp 32 to a closed condition 38, such as is illustrated in Figure 50.
  • fluid is directed through fluid supply tube 78, and through one-way valve 80 into inflatable cuff 34 to thereby expand inflatable cuff 34 to an extent appropriate to physiologically occlude LAA 20 at base 26.
  • Figure 5E illustrates such occlusion subsequent to inflation of inflatable cuff 34.
  • Sufficient occlusion of LAA 20 may be confirmed through echocardiography and/or fluoroscopy. If, for example, further closure of LAA 20 is required to accomplish physiological occlusion, additional fluid may be added to inflatable cuff 34 through fluid supply tube 78.
  • control arm 40 may be detached from clamp 32 as described above.
  • fluid supply tube 78 may be separated from inflatable cuff 34, preferably upstream from one-way valve 80 so as to maintain fluid pressure within inflatable cuff 34.
  • An illustration of implant 24 at LAA 20 subsequent to separation from control arm 40 and fluid supply tube 78 is shown in Figure 5F.
  • a variety of mechanisms are contemplated for separating fluid supply tube 78 from inflatable cuff.
  • a thoracoscopic scissor maybe guided through delivery device 12 to cut fluid supply tube 78 at a location proximal to one-way valve 80.
  • the thoracoscopic scissor, fluid supply tube 78, and control arm 40 may be withdrawn through respective lumens 14, 16 of delivery device 12, and the delivery device 12 may thereafter be withdrawn from the patient. Consequently, implant 24 may be left at LAA 20 indefinitely to ensure physiological occlusion thereof.
  • inflatable cuff 34 is detachably secured to clamp 32, such that subsequent to confirmation of physiological occlusion of LAA 20 by inflatable cuff 34, clamp 32 may be detached from inflatable cuff 34, and withdrawn from the procedure site through delivery device 12. In such an embodiment, only inflatable cuff 34 is left at LAA 20 following the occlusion procedure.
  • clamp 32 primarily acts as an anchoring mechanism, while inflatable cuff 34 performs the occlusion of LAA 20.
  • Inflatable cuff 34 may assume a variety of configurations, and in one embodiment may have a height "H" of about 0.22 cm. Other sizes, however, of inflatable cuff 34 may be employed in implant 24 of the present invention.
  • the term "cuff is not intended to be exclusive of the various inflatable or otherwise expandable bodies useful in the present application. To that end, other terms may be interchangeably utilized to describe inflatable cuff 34.
  • Example alternative terms include bladder, balloon, diaphragm, vessel, skirt, tube, and the like.
  • inflatable cuff 34 may be selectively and adjustably expandable through means other than inflation, including various mechanical expansion means to constrict the LAA 20 to an occlusive extent.
  • FIGS 6A-6L depict another embodiment of an epicardial implant 100 and delivery device 102.
  • delivery device 102 enables a user to manipulate a positioning device 104 of the implant 100 about the atrial appendage.
  • delivery device 102 includes a handle 106 that is configured to pivot a first prong 108 and a second prong 110 of the positioning device 104 toward and away from one another.
  • handle 106 may be scissor-like and include two members that are coupled with a hinge or pivot point 114 that allows a user to open and close the prongs 108 and 110.
  • a user such as a surgeon or other medical personnel, may use the handle 106 to position the first prong 108 and the second prong 110 around a base of an atrial appendage such that the atrial appendage is disposed within an open interior 112 of the positioning device 104. Open interior 112 is formed between the first prong 108 and the second prong 110 as shown in Figure 6B. While shown with pivot point 114 being a part of positioning device 104, it will be appreciated that in some embodiments, the pivot point 114 may be disposed on the handle 106. [0083] Once the positioning device 104 is in the proper location, the handle 106 may be used to close the positioning device 104 around the atrial appendage.
  • a user may pivot the two handle members toward one another about pivot point 114 to bring the first prong 108 and the second prong 110 into close proximity, oftentimes in a parallel or near parallel (within about 5° of parallel) state as shown in Figure 6C.
  • an inner surface of the positioning device 104 may be configured to only lightly contact the surface of the atrial appendage when closed to maintain a general position of the positioning device 104. In other embodiments, when closed the positioning device 104 is secured with greater pressure against the atrial appendage such that the atrial appendage is pinched between the first prong 108 and the second prong 110.
  • a distal end of the positioning device 104 may clasp or latch to maintain the prongs 108 and 110 in a desired position.
  • a distal end of one or both of the prongs 108 and 110 may form a clasp or latch.
  • the first prong 108 may include a latch extension 116 that is configured to engage with a corresponding receptacle 118 of the second prong 110.
  • Receptacle 1 18 is shown in Figure 6D and may include a recess that receives a protrusion of the latch extension 116 to lock the latch extension 116 in place. It will be appreciated, however, that other securement mechanisms may be used, and in some embodiments, the location of the latch and the receptacle may be reversed.
  • the positioning device 104 including the latch extension 116, may be configured to be re-opened such that the positioning device 104 can be repositioned.
  • the latch extension 116 and receptacle 118 may be configured to disengage upon application of a predetermined amount of force applied via the handle 106.
  • the latch mechanism may include a disengagement actuator that releases the latch extension 116 from the recess 118.
  • the positioning device 104 may be opened and closed any number of times to ensure that a proper placement of the positioning device 104 is achieved.
  • the positioning device 104 may form a closed circuit surrounding the open interior 112, with the first prong 108 and second prong 110 serving as elongated side members and the distal end and hinge or other pivot point 114 forming end members.
  • the positioning device 104 may close only three sides of the open interior, with an end opposite the distal end remaining open.
  • the positioning device 104 may house one or more expandable cuffs 120.
  • the first prong 108 and the second prong 110 may each define a cuff housing 122.
  • the cuff housing 122 may be a recess formed within an interior surface of each prong 108 and 110 that is sized and shaped to receive an uninflated cuff 120.
  • Cuffs 120 be formed from similar materials and may have similar features as cuffs 34 described in relations to Figures 1-5 above.
  • cuff 120 may define one or more balloon structures, with the balloon structures employing a resiliently elastic skin which may be resiliently expanded upon the filling of an internal reservoir.
  • Cuff 120 may include relatively rigid outer walls with relatively elastic and non-rigid inner walls.
  • Cuff 120 may be secured to the positioning device 104 at one or more points along a length of the positioning device 104.
  • Each cuff 120 may include one or more distinct chambers that are sequentially or simultaneously filled with inflation fluid supplied through fluid supply tube.
  • the cuffs 120 may be any shape or size to press and/or squeeze against the atrial appendage to physically occlude the appendage.
  • the cuffs 120 may have a triangular cross-sectional shape, with at least one separate cuff 120 being disposed in each of the prongs 108 and 110.
  • the cuffs 120 will be oriented such that parallel surfaces of the triangular cuff(s) in the first prong 108 and the triangular cuff(s) in the second prong 110 face one another, although other orientations may be possible. It will be appreciated that other shapes of cuffs 120 may be used.
  • cuffs 120 may have rectangular, square, circular, and/or other cross-sectional shapes that constrict and occlude the atrial appendage. Additionally, in some embodiments the cuffs 120 within the first prong 108 and the second prong 110 may have different shapes.
  • Each cuff 120 may be expanded by filling an internal reservoir of the cuff 120 with a fluid.
  • a fluid For example, saline and/or another fluid may be introduced into the reservoir via one or more fluid supply tubes 124.
  • the fluid may be introduced gradually, which allows the implant 100 to be repositioned if necessary, without damaging the contacting heart tissue.
  • the fluid supply tubes 124 may each include a one-way valve (not shown) that permits the fluid to be introduced into the reservoir, but prevents the fluid from escaping the reservoir.
  • a clip or other clamping device may be secured around a portion of the fluid supply tube to cinch or squeeze the outer walls of the tube together, thereby sealing the interior of the tube. This allows the cuff 120 to be deflated again by removing the clip and allowing the fluid to escape the cuff 120. Deflation of the cuff 120 may be necessary if the positioning device 104 moves out of a proper position. In some embodiments, a portion of the fluid supply tube may be burned off after the cuffs 120 have been inflated. This may serve to remove any excess tubing, as well as to melt the remaining tube shut to seal the cuffs 120.
  • the cuffs 120 are maintained in an uninflated state as shown in Figures 6E and 6F. This allows the implant 100 to be repositioned until a proper placement relative to the atrial appendage is achieved.
  • triangular cuffs 120 are shown in an uninflated state where inner surfaces of the cuffs 120 are at an angle relative to one another and are not close enough to one another to occlude the atrial appendage.
  • the cuffs 120 may be expanded by introducing fluid into the reservoir of each cuff 120.
  • the implant 100 including both the positioning device 104 and the cuffs 120, may be detached from the delivery device 102.
  • the handle 106 may include a quick release mechanism that allows the implant 100 to be quickly disengaged.
  • each member of handle 106 may include a depressible actuator, such as a button 126.
  • button 126 In an engaged position, button 126 may extend outward through an opening in the handle 106.
  • the button 126 may be biased outward, such as using a spring 128 positioned within the handle 106.
  • Button 126 may be coupled with and/or formed integral with a magazine catch 130. Magazine catch 130 is configured to be received within a recess formed within the handle 106 and may include a catch boss 132 that extends from a main body of the magazine catch 130.
  • the catch boss 132 may engage within a catch recess 134 formed within the position device 104.
  • the button 126 forces the magazine catch 130 and catch boss 132 to move away from the catch recess 134, thereby releasing the handle 106 from the positioning device 104 as shown in Figures 61 and 6 J.
  • a portion of the magazine catch 130 may extend through an opening formed in the handle 106 when the button 126 is depressed as shown in Figure 6K.
  • both handle members may include the quick release mechanism.
  • the buttons 126 may be actuated simultaneously and/or individually. This allows the handle members to be detached from the implant 100 at the same time or one by one. It will be appreciated that other quick release mechanisms may be utilized to releasable couple the handle 106 and the implant 100. It will also be appreciated that the quick release mechanism may be reversed such that the actuator is on the implant 100 rather than the delivery device 102.
  • the handle 106 may be adjustable and/or configured to be at an angle relative to the positioning device 104 such that the two components are not co-planar.
  • the handle 106 may be pivoted or otherwise attached to the positioning device 104 at an angle of between about 0° and 90°. Such orientations may allow the surgical team an easier angle to view and manipulate the positioning device 104.
  • FIGS 7A-7C depict another embodiment of an implant 200 and delivery device 202 that uses circular cuffs 220.
  • Implant 200 and delivery device 202 may be constructed similarly to those described in relation to Figures 6A-6L.
  • delivery device 202 may include handle 206 and a quick release mechanism 212 similar to that of delivery device 102.
  • Implant 200 includes a positioning device 204 having a first prong 208 and a second prong 210 that may be pivoted relative to each other between an open state and a closed state.
  • Each prong 208 and 210 defines a cuff housing 222, such as a recess that is sized and shaped to receive the unexpanded cuff 220 as shown in Figure 7B.
  • the cuffs 220 may be expanded as shown in Figure 7C.
  • circular cuffs 220 are expanded such that the inner-facing surfaces of each cuff 220 are positioned proximate to one another, allowing the cuffs 220 to pinch or otherwise occlude the atrial appendage.
  • FIGS 8A-8H depict an embodiment of an implant delivery system in the form of a catheter system.
  • the catheter system may include a catheter body, such as advancing sheath 300 that defines at least one lumen. As shown here, sheath 300 defines three lumens.
  • a first lumen 302 is provided that is configured to receive a guide wire 304.
  • Two outer lumens 306 are provided that receive an implant 320 that includes a positioning device 308 and at least one cuff 310.
  • the positioning device 308 may include a containment sheath 312, a support wire 314, and a shape memory wire 316.
  • the containment sheath 312 may extend around the support wire 314, shape memory wire 316, and catheter with cuff 310.
  • the first lumen 302 may be offset from the two outer lumens 306 such that the positioning device is in a different plane than the guide wire 304 as shown in Figure 8B.
  • the advancing sheath 300 may be elongated such that it constrains all or a substantial portion of the positioning device 308 and cuff 310 as shown in Figure 8C. This elongate advancing sheath may be inserted percutaneously for placement of the positioning device 308 and cuff 310 around an atrial appendage.
  • the guide wire 304 may be inserted into the patient.
  • the guide wire 304 is reciprocatably received within the catheter body 300 and is configured to manipulate a position of the positioning device 308, the advancing sheath 300, and cuff 310 to a proper location.
  • the advancing sheath 300 may be at least partially retracted, exposing at least a portion of the positioning device 308 as shown in Figure 8D.
  • the exposure of the positioning device 308 may be a result of the positioning device 308 being pushed out of the advancing sheath 300.
  • This allows the support wire 314 to be unconstrained, enabling the support wire 314 to expand the positioning device 308.
  • the support wire 314 may be biased to expand to a circular, ovoid, and/or other generally open shape when unconstrained.
  • the positioning device 308 may include two sides and a distal end that define an open interior 318 in which the atrial appendage may be received.
  • the size of the open interior 318 may be determined by how far the advancing sheath 300 is retracted, with a larger retraction resulting in a larger sized open interior 318. While shown here having a loop shape, it will be appreciated that the positioning device 308 and/or support wire 314 may have other shapes that define open interiors, such as hook shapes.
  • the containment sheath 312 may be removed, exposing the support wire 314, shape memory wire 316, and cuff 310 as shown in Figure 8E. In some embodiments, the removal of the containment sheath 312 may be done once the shape memory wire 316 is set. This exposes the uninflated cuff 310 or balloon.
  • the support wire 314 may be configured to restrict the shape memory wire 316 from retaining its preset shape. Once the open interior 318 is properly positioned around the atrial appendage, the support wire 314 may be removed from the catheter system as shown in Figure 8F. This allows the shape memory wire 316 to return to its shape memory as shown in Figure 8G.
  • the shape memory wire 316 may be formed of nitinol, or a similar shape memory material, and may be formed to contract into a more compact shape that may capture and/or compress the atrial appendage.
  • the shape memory wire 316 may grab the atrial appendage lightly so as to just maintain a position of the implant, while in other embodiments, the shape memory wire 316 is configured to firmly compress the appendage.
  • the cuff(s) 310 may be inflated and/or otherwise expanded into the open interior 318 as shown in Figure 8H.
  • the cuff(s) 310 may include a single cuff 310 or a series of cuffs 310 that are configured to contact multiple sides of the atrial appendage to occlude the appendage.
  • the cuff 310 may be generally u- shaped with a circular cross-section.
  • the u-shaped cuff 310 may include two sides and a distal end that defines the open interior 318.
  • cuffs 310 While shown having a round or circular cross- sectional shape, it will be appreciated that other cross-sectional and/or longitudinal shapes of cuffs 310 may be used. Additionally, rather than a single u-shaped cuff 310, a number of cuffs 310 may be provided to occlude the appendage.
  • the cuff(s) 310 may be inflated by introducing a fluid into one or more reservoirs within each cuff 310. The fluid may be introduced gradually, which allows the implant 320 to be repositioned if necessary, without damaging the contacting heart tissue. In some embodiments, this may be achieved by introducing the fluid through a fluid supply tube (not shown). A one-way valve may be used to ensure that the fluid may not escape the cuff 310.
  • a clip or other clamping device may be secured around a portion of the fluid supply tube to cinch or squeeze the outer walls of the tube together, thereby sealing the interior of the tube. This allows the cuff 120 to be deflated again by removing the clip and allowing the fluid to escape the cuff 120. deflation of the cuff 120 may be necessary if the positioning device 104 moves out of a proper position.
  • the cuff(s) 310 squeeze and/or otherwise occlude the atrial appendage. Finally, after inflating the cuff(s) 310, the shape memory wire 316 and cuff(s) 310 are detached from the rest of the catheter system as shown in Figure 81. This allows the shape memory wire 316 and cuff(s) 310 to remain attached to the atrial appendage. To detach the cuff(s) 310, it may be necessary to clip or otherwise cut the fluid supply tube. This may be done at a position upstream of the one-way valve and/or clip to ensure that the cuff(s) 310 remains inflated. In some embodiments, a portion of the fluid supply tube may be burned off after the cuff(s) 310 have been inflated. This may serve to remove any excess tubing, as well as to melt the remaining tube shut to seal the cuff(s) 310.
  • a grasping device such as that described in relation to Figure 1 may be employed to grasp and releasably hold the atrial appendage to facilitate positioning and engagement of any of the implants 100, 200, and 320.
  • Grasping device may typically comprise a conventional grasping tool, such as a suction tube which establishes negative pressure at a distal end thereof, the negative pressure being suitable to releasably retain tissue, such as the atrial appendage at distal end.
  • Alternative grasping tools include thoracoscopic forceps and the like.
  • FIG. 9 depicts a process 900 for treating an atrial appendage using an epicardial implant.
  • process 900 may be performed using any of the epicardial implants described herein, such as implant 24, implant 100, implant 200, and implant 320.
  • Process 900 may begin by providing the epicardial implant at block 902.
  • the implant may include a positioning device and at least one expandable cuff that is expandable into at least a portion of the open interior of the positioning device.
  • Access to the heart may be provided percutaneously, such as by using a catheter implant system such as implant 320 and/or during an open-chest procedure in which an implant system such as implant 24, 100, or 200 may be used.
  • the epicardial implant is positioned around an external surface of the atrial appendage such that a base of the atrial appendage is disposed in the open interior of the positioning device.
  • the positioning device may include a support wire that is configured to expand the open interior of the positioning device for positioning about the base of the atrial appendage.
  • the positioning device may also include a shape memory wire, such as a nitinol wire.
  • the support wire may be manipulated (using a guide wire) to a position in which an outer periphery of the support wire encircles at least a portion of the base of the atrial appendage.
  • the support wire may then be removed, enabling the shape memory wire to rebound to a preset shape that is configured to close the open interior of the positioning device, that is guided around the base of the atrial appendage.
  • the positioning device may be positioned around and closed about the atrial appendage using a forceps-like delivery device.
  • the positioning device may be latched or otherwise secured about the appendage.
  • the at least one expandable cuff is expanded into the open interior of the positioning device to an extent sufficient to physically occlude the atrial appendage at the base at block 906. This may be done by introducing a fluid, such as saline, into an interior of the at least one expandable cuff via a fluid supply tube.
  • fluid may be introduced into the at least one expandable cuff via a one-way valve that interfaces with the fluid supply tube of the delivery device.
  • a clip or other clamping device may be secured around a portion of the fluid supply tube to cinch or squeeze the outer walls of the tube together, thereby sealing the interior of the tube.
  • the positioning device prior to expanding the at least one expandable cuff, the positioning device may be secured to the atrial appendage. This helps ensure that the implant does not move during the expansion step.
  • the positioning device may be secured by tightening at least the first side and the second side of the positioning device such that the first side and the second side contact the atrial appendage.
  • a shape memory wire may be used to clamp or otherwise close the positioning device against a surface of the atrial appendage.
  • the epicardial implant may be disengaged from a delivery device at block 908.
  • a delivery device For example, in a percutaneous application, a containment sheath, support wire, and advancing sheath may be retracted and the shape memory wire and cuff(s) may be cut or otherwise disengaged from the rest of the catheter system.
  • a quick release mechanism may be actuated to release a handle of a delivery device from the positioning device and cuffs.

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Abstract

La présente invention concerne un implant épicardique comportant un dispositif de positionnement qui définit un intérieur ouvert. Le dispositif de positionnement est configuré de façon à être couplé de façon détachable à un dispositif de placement d'implant de sorte que le dispositif de positionnement puisse être détaché du dispositif de placement d'implant une fois que l'implant est en place autour d'un appendice auriculaire. Le dispositif de positionnement a des premier et deuxième côtés avec une extrémité distale qui couple les premier et deuxième côtés. L'implant comprend un manchon extensible couplé au dispositif de positionnement. Le dispositif de positionnement est configuré pour déplacer sélectivement le manchon extensible vers et depuis un appendice auriculaire pour positionner le manchon extensible dans une position souhaitée par rapport à l'appendice auriculaire. Le manchon extensible est extensible dans au moins une partie de l'intérieur ouvert du dispositif de positionnement pour occlure physiquement une base de l'appendice auriculaire après le placement du manchon extensible dans la position souhaitée.
PCT/US2018/047233 2017-08-21 2018-08-21 Système pour occlusion d'appendice auriculaire gauche WO2019040440A1 (fr)

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US15/681,812 US10631868B2 (en) 2010-06-24 2017-08-21 System for occlusion of left atrial appendage

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3538917A (en) * 1968-04-12 1970-11-10 Robert G Selker Balloon occlusion clip
US20020072759A1 (en) * 2000-08-15 2002-06-13 Fry William R. Low-profile, shape-memory surgical occluder
US7566336B2 (en) * 2003-11-25 2009-07-28 Cardia, Inc. Left atrial appendage closure device
US20100145361A1 (en) * 2004-06-18 2010-06-10 Francischelli David E Methods and Devices for Occlusion of an Atrial Appendage
US20110009853A1 (en) * 2001-12-04 2011-01-13 Bertolero Arthur A Left atrial appendage devices and methods
WO2014190317A2 (fr) * 2013-05-24 2014-11-27 Cedars-Sinai Medical Center Dispositifs et procédés d'occlusion d'appendice auriculaire gauche
US20140364901A1 (en) * 2008-07-19 2014-12-11 Atricure, Inc. Pericardial Devices, Systems and Methods for Occluding an Atrial Appendage
US20170042550A1 (en) * 2014-04-25 2017-02-16 Flow MedTech, Inc Left atrial appendage occlusion device
US20170196568A1 (en) * 2014-07-07 2017-07-13 Rainbow Medical Ltd. Left atrial appendage closure

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3538917A (en) * 1968-04-12 1970-11-10 Robert G Selker Balloon occlusion clip
US20020072759A1 (en) * 2000-08-15 2002-06-13 Fry William R. Low-profile, shape-memory surgical occluder
US20110009853A1 (en) * 2001-12-04 2011-01-13 Bertolero Arthur A Left atrial appendage devices and methods
US7566336B2 (en) * 2003-11-25 2009-07-28 Cardia, Inc. Left atrial appendage closure device
US20100145361A1 (en) * 2004-06-18 2010-06-10 Francischelli David E Methods and Devices for Occlusion of an Atrial Appendage
US20140364901A1 (en) * 2008-07-19 2014-12-11 Atricure, Inc. Pericardial Devices, Systems and Methods for Occluding an Atrial Appendage
WO2014190317A2 (fr) * 2013-05-24 2014-11-27 Cedars-Sinai Medical Center Dispositifs et procédés d'occlusion d'appendice auriculaire gauche
US20170042550A1 (en) * 2014-04-25 2017-02-16 Flow MedTech, Inc Left atrial appendage occlusion device
US20170196568A1 (en) * 2014-07-07 2017-07-13 Rainbow Medical Ltd. Left atrial appendage closure

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