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US20180271505A1 - Scaffolds for Joining Layers of Tissue at Discrete Points - Google Patents

Scaffolds for Joining Layers of Tissue at Discrete Points Download PDF

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Publication number
US20180271505A1
US20180271505A1 US15/467,239 US201715467239A US2018271505A1 US 20180271505 A1 US20180271505 A1 US 20180271505A1 US 201715467239 A US201715467239 A US 201715467239A US 2018271505 A1 US2018271505 A1 US 2018271505A1
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US
United States
Prior art keywords
scaffold
tissue
passages
adhesive
top cover
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.)
Abandoned
Application number
US15/467,239
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English (en)
Inventor
Julian Quintero
Leo B. Kriksunov
Robert J. Tannhauser
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.)
Ethicon Inc
Original Assignee
Ethicon 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 Ethicon Inc filed Critical Ethicon Inc
Priority to US15/467,239 priority Critical patent/US20180271505A1/en
Assigned to ETHICON, INC. reassignment ETHICON, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KRIKSUNOV, LEO B., QUINTERO, JULIAN, TANNHAUSER, ROBERT J.
Priority to BR112019019640A priority patent/BR112019019640A2/pt
Priority to EP18716715.0A priority patent/EP3600468B1/fr
Priority to CN201880020260.1A priority patent/CN110461380A/zh
Priority to AU2018237676A priority patent/AU2018237676A1/en
Priority to PCT/US2018/022834 priority patent/WO2018175225A1/fr
Priority to JP2019551995A priority patent/JP7191847B2/ja
Publication of US20180271505A1 publication Critical patent/US20180271505A1/en
Priority to US17/021,601 priority patent/US11980354B2/en
Priority to AU2023202456A priority patent/AU2023202456A1/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/0057—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/00491—Surgical glue applicators
    • 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
    • A61F5/00—Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices ; Anti-rape devices
    • A61F5/0003—Apparatus for the treatment of obesity; Anti-eating devices
    • A61F5/0013—Implantable devices or invasive measures
    • A61F5/0083—Reducing the size of the stomach, e.g. gastroplasty
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/28—Materials for coating prostheses
    • A61L27/34—Macromolecular materials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
    • A61L27/58—Materials at least partially resorbable by the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/00491—Surgical glue applicators
    • A61B2017/00504—Tissue welding
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/0057—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect
    • A61B2017/00646—Type of implements
    • A61B2017/0065—Type of implements the implement being an adhesive
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/0057—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect
    • A61B2017/00646—Type of implements
    • A61B2017/00659—Type of implements located only on one side of the opening
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/11—Surgical instruments, devices or methods for performing anastomosis; Buttons for anastomosis
    • A61B2017/1139—Side-to-side connections, e.g. shunt or X-connections
    • 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
    • A61F2/0063—Implantable repair or support meshes, e.g. hernia meshes

Definitions

  • the present disclosure relates to resorbable scaffolds comprising passages that provide discrete fixation points of two layers of tissue to each other with an adhesive, while simultaneously enabling direct contact between layers of tissue being joined.
  • layers of tissue can be joined utilizing surgical adhesives instead of suturing or stapling, whereby a layer of surgical adhesive is “sandwiched” between the layers of tissue.
  • One known method of applying surgical adhesives is related to dispensing liquid adhesive on one layer of tissue from a dispenser, and then applying the second layer of tissue on top.
  • PCT publication No. WO2008/082444 titled “Articles and Methods for Tissue Repair” discloses a method of medically treating a tissue comprising: directing a transfer device to a tissue surface, the transfer device having associated therewith a patterned array of an adhesive; transferring at least a portion of the patterned array of adhesive from the transfer device to the tissue surface by contact adhesion; moving the transfer device away from the tissue surface; positioning an article to be adhered adjacent at least a portion of the adhesive; and adhering the article to the tissue surface using the adhesive.
  • U.S. Pat. No. 8,353,966 entitled “Scaffold for Bone and Tissue Repair in Mammals” discloses a tissue scaffold for repair and regeneration of bone hard tissue or muscle, skin, or organ soft tissue, the scaffold comprising: a rigid scaffold body having a scaffold central axis, a scaffold transverse dimension, and a scaffold lengthwise dimension which is greater than the scaffold transverse dimension, the scaffold body having a compressive strength between about 20 and about 250 MPa and comprising: biocompatible inorganic glass fibers each having a fiber transverse dimension and a fiber lengthwise dimension which is at least about 10 times the fiber transverse dimension; and an interconnected porosity constituting between about 10 vol. % and about 35 vol.
  • each of the fibers has a diameter between about 20 and about 5000 microns; wherein at least about 75 vol. % of the fibers are longitudinally co-aligned and lie generally lengthwise of the scaffold central axis, are generally free of helical orientation about the scaffold central axis, and are arranged to define open channels within the scaffold which allow fluid flow into and lengthwise within the scaffold; and wherein the fibers are self-bonded together in that adjacent longitudinally aligned fibers are fused together.
  • U.S. Pat. No. 6,652,559 entitled “Wound Closure System” discloses a wound closure system for closing a wound on a patient, comprising: an elongated flexible backing strip having opposite ends, first and second surfaces facing away from one another and a length and width sufficient to secure facing edges of the wound in close juxtaposition to one another, said backing strip comprising a first portion disposed between said ends and adapted to overlie the facing edges of said wound, and second and third portions disposed on either side of said first portion and each provided with a predetermined number of spaced-apart perforations extending through said backing strip from said first surface to said second surface, said first portion being free of any aperture extending through said backing strip from said first surface to said second surface; a first pressure-sensitive adhesive coated on at least part of the first surface of said backing strip including said second and third portions thereof, to adhere at least said second and third portions of said backing strip to the patient with the facing edges of said wound in said close juxtaposition; a first protective member removably attached to said backing strip and
  • U.S. Patent Application Publication No. 2013/0012988 entitled “Wound Closure Material” discloses wound closure material with a core of biodegradable material, wherein at least one side of the core of biodegradable material is provided with a multitude of discrete spots of an adhesive and the core of biodegradable material comprises an open cell structure.
  • U.S. Pat. No. 8,642,831 entitled “Device for Promotion of Hemostasis and/or Wound Healing” discloses a hemostatic matrix material comprising a surface and a plurality of open and interconnected cells, said matrix material comprising gelatine or collagen, wherein the surface of said matrix comprises at least one pharmaceutical composition printed onto said surface in individual and discrete locations, Wherein said pharmaceutical composition comprises one or more hemostatic agents.
  • Synthetic tissue adhesive TissuGlu® Surgical Adhesive by Cohera Medical, Inc. is based on a polyurethane prepolymer and is applied in a spot-like discrete application of the adhesive during abdominoplasty, using a multi-point dispenser.
  • U.S. Patent Application publication No. 2014/0155916 entitled “Multi-layer Porous Film Material” discloses a surgical implant, comprising: a first porous film layer including a plurality of pores; and a second porous film layer including a plurality of pores, the first and second porous film layers being in a stacked configuration and interconnected to one another at a plurality of attachment points to define at least one void between the first and second porous film layers.
  • U.S. Patent Application publication No. 2008/0109034 entitled “Controlled Adhesive Locations Facilitating Tissue Remodeling” discloses a surgical implant for adhering two portions of tissue together comprising; a) an implantable matrix having at least one layer and a plurality of openings formed within the at least one layer for tissue growth therethrough; and b) a polymer adhesive about the implantable matrix for adhering the two portions of tissue together, the adhesive polymerizing to adhere the tissue together when the two portions of tissue are brought together.
  • U.S. Patent Application publication No. 2006/0141012 entitled “Tissue Scaffold” discloses a tissue scaffold comprising: a first film including a plurality of cell openings; and a second film adjacent the first film and including a plurality of cell openings larger than the cell openings of the first film; wherein the cell openings of the first film interconnect with the cell openings of the second film to define pathways extending from the first film to the second film.
  • U.S. Patent Application publication No. 2013/0204077 entitled “Surgical Scaffolds” discloses a surgical scaffold for soft tissue repair, said surgical scaffold comprising a sheet of non-filamentous polymeric material, at least a portion of the sheet surface comprising a plurality of through-holes.
  • a device for joining two layers of tissue comprises a substantially flat and flexible scaffold having an upper surface, a lower surface and sidewalls; a plurality of first passages penetrating said scaffold from said upper surface to said lower surface; a plurality of second passages penetrating said scaffold from said upper surface to said lower surface; a substantially flat and flexible top cover releasably attached to said upper surface and covering all of said upper surface; said top cover having a plurality of top cover passages aligned with said first plurality of passages.
  • a kit comprising the device for joining two layers of tissue, a container containing a polymerizable or cross-linkable fluid adhesive, and a dispenser adapted to dispense said adhesive onto said device.
  • a method of adhesively joining layers of tissue using the device, comprising the steps of: Dispensing a fluid adhesive onto the top cover and filling the plurality of first passages with the adhesive; Removing the top cover from the scaffold; Positioning the scaffold between a first tissue and a second tissue and establishing contact of the adhesive in the first passages with the first and the second tissue; Polymerizing and/or cross-linking the adhesive in contact with the first and second tissue, thus bonding the first and second tissue to each other through the scaffold at discrete points of bonding; Establishing direct contact between the layers of tissue through the plurality of second passages; Leaving the scaffold between the first and the second tissues.
  • FIG. 1 shows an embodiment of the device in a schematic perspective view.
  • FIG. 2 shows an embodiment of the device in a schematic perspective cross-sectional view.
  • FIG. 3 shows an embodiment of the device in a schematic perspective cross-sectional exploded view.
  • FIG. 4 shows an embodiment of the device in a schematic perspective view.
  • FIG. 5 shows an embodiment of the device in a schematic perspective cross-sectional view.
  • FIG. 6 shows an embodiment of the device in a schematic perspective cross-sectional exploded view.
  • FIG. 7 shows an embodiment of the device in a schematic perspective view.
  • FIG. 8 shows an embodiment of the device in a schematic top view.
  • FIG. 9 shows an embodiment of the device in a schematic side view.
  • FIG. 10 shows an embodiment of the device in a schematic perspective view.
  • FIG. 11 shows an embodiment of the device in a schematic top view.
  • FIG. 12 shows an embodiment of the device in a schematic side view.
  • FIG. 13 shows an embodiment of the device in a schematic top view.
  • FIG. 14 shows an embodiment of the device in a schematic side cross-sectional view.
  • FIG. 15 shows an embodiment of the device in a schematic top view.
  • FIG. 16 shows an embodiment of the device in a schematic side cross-sectional view.
  • FIGS. 17-18 show embodiments of the scaffold in a schematic bottom view.
  • FIGS. 19-21 show embodiments of the scaffold in a schematic top view.
  • FIGS. 22A-D show embodiments of the device in operation in a schematic side cross-sectional view.
  • FIGS. 23A-E show embodiments of the device in operation a schematic side cross-sectional view.
  • FIG. 1 is showing a schematic perspective view
  • FIG. 2 is showing a schematic perspective cross-sectional view
  • FIG. 3 is showing a schematic perspective cross-sectional exploded view of device 10 .
  • Device 10 comprises thin, flat, flexible scaffold 2 C) made of resorbable or non-resorbable material.
  • scaffold 20 is made of at least partially resorbable or at least partially soluble polymeric or composite material.
  • scaffold 20 is fully resorbable or fully soluble.
  • Scaffold 20 is substantially flat and flexible and is defined by upper surface 22 , lower surface 24 and side walls 26 .
  • a plurality of first passages 30 and a plurality of second passages 40 comprise through-holes or apertures in scaffold 20 and traverse scaffold 20 from upper surface 22 to lower surface 24 , generally perpendicularly to upper surface 22 and lower surface 24 .
  • First passages 30 are seen on upper surface 22 as first upper openings 32 and are seen on lower surface 24 as first lower openings 34 .
  • Second passages 40 are seen on upper surface 22 as second upper openings 42 and are seen on lower surface 24 as second lower openings 44 .
  • first passages 30 and second passages 40 are perpendicular to upper surface 22 and lower surface 24 , i.e. first upper openings 32 have the same dimensions as first lower openings 34 ; and second upper openings 42 have the same dimensions as second lower openings 44 .
  • first passages 30 have conical shape, whereby first upper openings 32 are larger than first lower openings 34 .
  • second passages 40 are empty openings or apertures.
  • second passages 40 can be filled by rapidly soluble materials (not shown), optionally containing medically useful agents, such as wound healing agents, fluid absorbent materials, etc.
  • Scaffold 20 can be of any geometrical shape or form, such as square, rectangular, round, oval, triangular etc.
  • the scaffold can be trimmable. Thickness of scaffold 20 (or height of sidewalls 26 ) is from about 0.2 mm to about 8 mm, more preferably from 1 mm to 6 mm, such as 1, 2, 3, 4 mm.
  • the gross surface area of scaffold 20 when measured from a top view as for instance shown in FIGS. 19-21 is from about 3 cm 2 to about 400 cm 2 , more preferably from 5 cm 2 to 300 cm 2 , such as 10, 20, 50, 100, 150, 200 cm 2 .
  • the diameter of the circle is from about 2 cm to about 20 cm, such as 5 cm, 10 cm, 15 cm, 20 cm.
  • the side of the square is from about 2 cm to about 20 cm, such as 3, 5, 10, 15, 20 cm.
  • First and second passages 30 , 40 can be of any geometry, including circular, rectangular, etc.
  • first passages 30 can have diameters from about 1 mm to about 15 mm, such as 2, 5, 10 mm.
  • second passages 40 can have diameters from about 2 rum to about 50 mm, such as 2, 5, 10, 25, 40 mm.
  • Plurality of second passages 40 can take 50%-95% of space on upper 22 and lower 24 surfaces of scaffold 20 which is not taken by first passages 30 , with positioning of second passages 40 configured so as to not intersect any first passages 30 .
  • the portion of total area of space on upper 22 and lower 24 surfaces of scaffold 20 taken by first passages 30 can be from 5% to 50%; the portion of total area of space on upper 22 and lower 24 surfaces of scaffold 20 taken by second passages 40 can be from 50% to 95%.
  • first passages 30 and second passages 40 are covering a substantial portion of scaffold 20 , such as 30% to 95% of upper surface 22 , such as 40, 60, 80, 90% of upper surface 22 .
  • surface area taken by second passages 40 is from about 30% to about 300% of the surface area taken by first passages 30 .
  • surface area taken by second passages 40 is equal or larger than surface area taken by first passages 30 .
  • Scaffold 20 can have from 4 to hundreds of first passages 30 , such as 10, 20, 50, 75, 100, 500. Scaffold 20 can have from 1 to hundreds of second passages 40 , such as 1, 5, 10, 20, 50, 100.
  • Scaffold 20 can be manufactured by many techniques known to a skilled artisan, such as punching, laminating, web converting, injection molding, layers bonding, machining, 3D printing, etc., and combinations thereof.
  • Scaffold 20 may be formed of either synthetic, semi-synthetic, or natural materials or combinations thereof.
  • suitable materials include, for example, PLGA or polylactic-co-glycolic acid, polylactic acid, polvglycolic acid, polycaprolactone, nylon, polyolefin, polyethylene, polypropylene, ethylene propylene copolymers, and ethylene butylene copolymers, polyurethanes, polyurethane foams, polystyrenes, plasticized polyvinylchlorides, polyesters, polyainides, copolymers and mixtures of the above, cotton, collagen, gelatin, and composites of the above.
  • Scaffold 20 can be porous or non-porous.
  • Scaffold 20 may be either biodegradable, or not biodegradable, or partially biodegradable.
  • biodegradable it is meant that scaffold 20 biodegrades over time in vivo, such that it does not require physical removal after a set period of time.
  • a biodegradable material is one that, in the in vivo environment, will biodegrade over a period of from about one week to about five years.
  • a non-biodegradable material is one that does not biodegrade in an in vivo environment within about five years.
  • surface grooves 80 connecting at least some of second passages 40 each other and/or to periphery of scaffold 20 as shown in FIG. 20 .
  • Surface grooves 80 are cut into upper surface 22 and/or lower surface 24 and are not in fluid communication with first passages 30 .
  • Surface grooves 80 are enabling bodily fluids movement or drainage from the area of joining tissues T 1 and T 2 with bodily fluids moving around discrete joining bonding points formed by adhesive 70 .
  • Device 10 further comprises top cover 200 which comprises thin, flat, flexible film defined by upper surface 222 , lower surface 224 and side walls 226 .
  • Top cover 200 is releasably attached to upper surface 22 and is configured to cover at least all upper surface 22 as shown in FIGS. 1-3 . In alternative embodiments, top cover 200 extends beyond upper surface 22 and is larger than upper surface 22 .
  • Top cover 200 has a plurality of top cover passages 230 which comprise through-holes or apertures in top cover 200 and traverse top cover 200 from its upper surface 222 to its lower surface 224 , generally perpendicularly to upper surface 222 and lower surface 224 .
  • Top cover passages 230 are seen on upper surface 222 as top cover upper openings 232 and are seen on lower surface 224 as top cover lower openings 234 .
  • top cover passages 230 are perpendicular to top cover 200 upper surface 222 and lower surface 224 , i.e., top cover upper openings 232 have the same dimensions as top cover lower openings 234 ; In some embodiments (not shown), top cover passages 230 have conical shape, whereby top cover upper openings 232 are larger than top cover lower openings 234 .
  • First passages 30 are in registration with top cover passages 230 , i.e., when top cover 200 is positioned on scaffold 20 as shown in FIGS. 1-2 , first passages 30 are aligned with top cover passages 230 , forming through-holes or apertures going all the way from top cover 200 upper surface 222 to scaffold 20 lower surface 24 . As shown, first upper openings 32 are aligned or are in registration with top cover lower openings 234 .
  • First upper openings 32 can be of the same or different dimensions as top cover lower openings 234 . In a preferred embodiment, as shown, first upper openings 32 have the same dimensions as top cover lower openings 234 . In some embodiments, first upper openings 32 are smaller than top cover lower openings 234 (not shown). In some embodiments, first upper openings 32 are larger than top cover lower openings 234 (not shown).
  • Second passages 40 are completely covered by top cover 200 and are not exposed on top cover 200 upper surface 222 , i.e. second upper openings 42 are fully covered by top cover 200 .
  • Top cover 200 is made of any polymeric material, such as polymeric film, release liner, etc. material.
  • FIGS. 4 through 6 an embodiment of device 10 of the present invention is shown, which is similar to the embodiments of FIGS. 1-3 , but with an additional optional bottom cover 300 .
  • FIG. 4 is showing a schematic perspective view
  • FIG. 5 is showing a schematic perspective cross-sectional view
  • FIG. 6 is showing a schematic perspective cross-sectional exploded view of device 10 .
  • the advantages of the bottom cover include improved handling and ease of use capabilities of the device as hereinafter described, for example, in the section describing “indirect till”, below.
  • device 10 further comprises optional bottom cover 300 which comprises thin, flat, flexible film defined by upper surface 322 , lower surface 324 and side walls 326 .
  • Bottom cover 300 is releasably attached to lower surface 24 of scaffold 20 and is configured to cover at least all lower surface 24 as shown in FIGS. 1-3 . In alternative embodiments, bottom cover 300 extends beyond lower surface 24 and is larger than lower surface 24 .
  • Optional bottom cover 300 has no apertures or openings, and is configured to completely cover first passages 30 and second passages 40 , i.e., to cover first lower openings 34 and second lower openings 44 .
  • Bottom cover 300 is made of any polymeric material, such as polymeric film, release liner, etc. material.
  • FIGS. 7-9 an embodiment of device 10 is shown with top cover 200 having a top cover pull tab 250 .
  • FIG. 7 is showing a schematic perspective view
  • FIG. 8 is showing a schematic top view
  • FIG. 9 is showing a schematic side view of device 10 .
  • Top cover pull tab 250 extends beyond scaffold 20 and overhangs scaffold 20 to facilitate lift-up and removal of releasable top cover 200 .
  • Top cover pull tab 250 is sized to be easily graspable by hand or by surgical grasper or by another surgical tool and can have a width substantially identical to top cover 200 width (as shown) or can be narrower, with the width of top cover pull tab 250 being 10%-80% of the width of top cover 200 .
  • width of top cover pull tab 250 is 1-10 cm, such as 1, 2, 3, 4, 5 cm.
  • Length L 1 of top cover pull tab 250 indicated in FIGS. 8-9, 11-12 by arrow L 1 is from about 3 mm to about 30 min, such as 5, 10, 15, 20 mm.
  • top cover 200 having a top cover pull tab 250
  • bottom cover 300 having a bottom cover pull tab 350 .
  • FIG. 10 is showing a schematic perspective view
  • FIG. 11 is showing a schematic top view
  • FIG. 12 is showing a schematic side view of device 10 .
  • Bottom cover pull tab 350 extends beyond scaffold 20 and overhangs scaffold 20 to facilitate lift-up and removal of releasable bottom cover 300 .
  • Bottom cover pull tab 350 is sized to be easily graspable by hand or by surgical grasper or by another tool and can have a width substantially identical to bottom cover 300 width (as shown) or can be narrower, with the width of bottom cover pull tab 350 being 10%-80% of the width of bottom cover 300 .
  • width of bottom cover pull tab 350 is 1-10 cm, such as 1, 3, 4, 5 cm.
  • Length L 2 of bottom cover pull tab 350 indicated in FIGS. 11-12 by arrow L 2 is from about 3 mm to about 30 mm, such as 5, 10, 15, 20 mm.
  • top cover pull tab 250 , and bottom cover pull tab 350 can be opposite each other for ease of independent removal of top cover 200 and bottom cover 300 .
  • top cover pull tab 250 , and bottom cover pull tab 350 can be positioned over the same sides of scaffold 20 , or can be positioned over adjacent sides of scaffold 20 .
  • FIGS. 13 and 14 an embodiment of device 10 similar to embodiments of FIGS. 7-9 is shown, with the shown embodiment having three of second passages 40 instead of two.
  • FIG. 13 shows a schematic top view
  • FIG. 14 shows a schematic side cross-sectional view along the lines A-A indicated in FIG. 13 .
  • FIGS. 15 and 16 an embodiment of device 10 similar to embodiments of FIGS. 10-12 is shown, with the shown embodiment having three second passages 40 instead of two.
  • FIG. 15 shows a schematic top view
  • FIG. 16 shows a schematic side cross-sectional view along the lines A-A indicated in FIG. 15 .
  • FIGS. 17 and 18 an embodiment of scaffold 20 similar to embodiments of FIGS. 1-12 is shown, with FIGS. 17 and 18 showing a schematic bottom view, i.e., view from the lower surface 24 .
  • FIG. 17 shows optional pressure sensitive adhesive bands or stripes 50 disposed over lower surface 24 , covering from 10% to 90% of lower surface 24 area not taken by first passages 30 and second passages 40 , i.e. covering from 10% to 90% of lower surface 24 area not taken by first lower openings 34 and second lower openings 44 .
  • optional pressure sensitive adhesive stripes 50 are covering 20, 30, 40, 50, 60, or 70% of lower surface 24 area not taken by first passages 30 and second passages 40 .
  • Other shapes and forms of applying pressure sensitive adhesive are contemplated, including dots, squares, mixed angular bands, etc.
  • FIG. 18 shows, in an alternative embodiment, optional pressure sensitive 52 disposed over lower surface 24 , covering 100% of lower surface 24 area not taken by first passages 30 and second passages 40 .
  • pressure sensitive adhesive can be additionally or alternatively deployed on upper surface 22 of scaffold 20 , in stripes, dots, bands, or in full coverage, in all cases on surface not taken by first passages 30 and second passages 40 .
  • FIGS. 19-21 showing a schematic top view, various embodiments of scaffold 20 are shown, with different sizes and different arrangements of first passages 30 and second passages 40 .
  • initiators and/or accelerators of adhesive polymerization or cross-linking can be disposed in first passages 30 as shown by reference numeral 60 , such as by being coated on first passages 30 walls as shown in FIGS. 19-21 and FIGS. 13-14 .
  • Initiators and/or accelerators of adhesive polymerization or cross-linking can be also disposed in second passages 40 , however in a preferred embodiment, no initiators and/or accelerators of adhesive polymerization or cross-linking are disposed in second passages 40 .
  • initiators and/or accelerators of adhesive polymerization or cross-linking can be disposed in first passages 30 on bottom cover 300 upper surface 322 , either on the whole upper surface 322 , or only inside first passages 30 on bottom cover 300 upper surface 322 , as shown in FIGS. 15-16 by reference numeral 62 .
  • initiators and/or accelerators of adhesive polymerization or cross-linking can be disposed in first passages 30 on bottom cover 300 upper surface 322 and also coated on the walls of first passages 30 .
  • a mesh coated with initiators and/or accelerators of adhesive polymerization or cross-linking provided on upper surface 22 , lower surface 24 , or both, with the mesh positioned over first passages 30 .
  • Scaffold 20 in some embodiments includes one or more chemical materials located in or on it.
  • one or more chemical substances may be dispersed in or on scaffold 20 , preferably within first passages 30 , on bottom cover 300 upper surface 322 , such as being chemically bound, physically bound, coated, absorbed, or adsorbed to it.
  • the scaffold 20 preferably includes at least a polymerization initiator or rate accelerator or modifier, and may optionally include one or more bioactive materials.
  • a polymerization initiator or accelerator or rate modifier may be loaded in or on scaffold 20 so that the initiator or rate modifier provides the desired initiation or rate modification effect to a subsequently applied polymerizable adhesive composition.
  • the polymerization initiator or rate modifier may be immobilized in or on scaffold 20 , so that the initiator or rate modifier does not become detached from scaffold 20 and its residues are dispersed in the resultant polymeric material.
  • the polymerization initiator or rate modifier may be initially attached to scaffold 20 , but only in such a manner that it becomes mobilized or solubilized by a subsequently applied polymerizable adhesive composition and dispersed in the resultant polymeric material.
  • a combination of chemical substances may also be provided in or on scaffold 20 , to provide multiple effects.
  • a first chemical species such as a polymerization initiator or rate modifier
  • a second, different chemical species such as a bioactive material
  • Other combinations of chemical species and resultant effects are also envisioned.
  • the chemical substance may be applied in a uniform manner to scaffold 20 , such that there is a substantially uniform concentration of the chemical substance within scaffold 20 .
  • the chemical substance may be applied such that a concentration gradient exists across or through scaffold 20 .
  • the chemical substances may be incorporated in or on scaffold 20 in any suitable manner.
  • the chemical substance may be added to scaffold 20 by contacting scaffold 20 with a solution, mixture, or the like including the chemical substances.
  • the chemical substance may be added to scaffold 20 , for example, by dipping, spraying, roll coating, gravure coating, brushing, vapor deposition, or the like.
  • the chemical substance may be incorporated into or onto scaffold 20 during manufacture of scaffold 20 , such as during molding.
  • the polymerization initiator or rate modifier loaded in or on scaffold 20 may provide a number of advantages for example, so as to provide faster polymerization time.
  • the concentration of polymerization initiator or rate modifier may be increased to provide even faster polymerization time.
  • the polymerization initiator or rate modifier is loaded directly in or on scaffold 20 , it is not necessary to mix the polymerizable adhesive composition with a polymerization initiator or rate modifier prior to application. This may allow a longer working time, where the polymerizable monomer composition may be more precisely and carefully applied over a longer period of time.
  • Quaternary ammonium chloride and bromide salts useful as polymerization initiators are particularly suitable.
  • quaternary ammonium salts such as domiphen bromide, butyrylcholine chloride, benzalkonium bromide, acetyl choline chloride, among others, may be used.
  • Benzalkonium or benzyltrialkyl ammonium halides such as benzyltrialkyl ammonium chloride may be used.
  • the benzalkonium halide may be benzalkonium halide in its unpurified state, which comprises a mixture of varying chain-length compounds, or it can be any suitable purified compound including those having a chain length of from about 12 to about 18 carbon atoms, including but not limited to C 12 , C 13 , C 14 , C 15 , C 16 , C 17 , and C 18 compounds.
  • the initiator may be a quaternary ammonium chloride salt such as benzyltrialkyl ammonium chloride (BTAC).
  • initiators or accelerators may also be selected by one of ordinary skill in the art without undue experimentation.
  • suitable initiators or accelerators may include, but are not limited to, detergent compositions; surfactants: e.g., nonionic surfactants such as polysorbate 20 (e.g., Tween 20TM from ICI Americas), polysorbate 80 (e.g., Tween 80TM from ICI Americas) and poloxamers, cationic surfactants such as tetrabutylammonium bromide, anionic surfactants such as sodium tetradecyl sulfate, and amphoteric or zwitterionic surfactants such as dodecyldimethyl(3-sulfopropyl)ammonium hydroxide, inner salt; amines, imines and amides, such as imidazole, arginine and povidine; phosphines, phosphites and phosphonium salts, such as triphenylphos
  • a blend of initiators may provide superior results to a single initiator.
  • the blend of initiators can provide one initiator that preferentially initiates one monomer, and a second initiator that preferentially initiates the other monomer, or can provide initiation rates to help ensure that both monomer species are initiated at equivalent, or desired non-equivalent; rates.
  • a blend of initiators can help minimize the amount of initiator necessary.
  • a blend of initiators may enhance the polymerization reaction kinetics.
  • FIG. 22 showing a schematic cross-sectional side view similar to the views shown in FIG. 14 or 16 , device 10 comprising scaffold 20 with top cover 200 is positioned on tissue T 1 , with tissue T 1 adjacent to and in contact with lower surface 24 as seen in FIG. 22A .
  • scaffold 20 is immobilized on tissue by optional pressure sensitive adhesive 50 or 52 disposed on lower surface 24 .
  • a cross-linkable or polymerizable liquid or semi-liquid adhesive 70 is then applied onto top cover 200 upper surface 222 allowing adhesive 70 to penetrate into top cover passages 230 and from there into first passages 30 , filling first passages 30 as shown. Excess adhesive 70 is also shown on top cover 200 upper surface 222 .
  • adhesive 70 is not able to penetrate into second passages 40 .
  • Adhesive 70 starts bonding to tissue T 1 at discrete zones or points defined by first passages 30 .
  • Top cover 200 is then removed, preferably by pulling on tab 250 , with scaffold 20 remaining on tissue T 1 as shown in FIG. 22C , with adhesive 70 filling first passages 30 and upper surface 22 exposed.
  • second tissue T 2 is then brought into contact with upper surface 22 thus sandwiching scaffold 20 between tissues T 1 and T 2 and bringing adhesive 70 contained within first passages 30 into contact also with tissue T 2 .
  • Adhesive 70 establishes a bond at its interfaces with tissues T 1 and T 2 and is also polymerized and/or crosslinks inside first passages 30 .
  • tissues T 1 and T 2 which are being adhesively joined are adhesively bound to each other by adhesive 70 at discrete zones or points defined by first passages 30 .
  • tissues T 1 and T 2 are exposed to each other and can establish contact through second passages 40 which are not filled with adhesive 70 .
  • FIG. 23 showing a schematic cross-sectional side view similar to the views shown in FIG. 14 or 16 , device 10 comprising scaffold 20 with top cover 200 and bottom cover 300 is initially positioned with top cover 200 upper surface 222 facing upwards.
  • cross-linkable or polymerizable adhesive 70 is then applied onto top cover 200 upper surface 222 allowing adhesive 70 to penetrate into top cover passages 230 and from there into first passages 30 , filling first passages 30 as shown.
  • Excess adhesive 70 is also shown on top cover 200 upper surface 222 .
  • adhesive 70 is not able to penetrate into second passages 40 .
  • Top cover 200 is then removed, optionally by pulling on tab 250 , leaving scaffold 20 with bottom cover 300 attached and with adhesive 70 filling first passages 30 and upper surface 22 exposed as shown in FIG. 23B .
  • scaffold 20 with bottom cover 300 is then turned with upper surface 22 towards tissue T 1 and brought into contact with tissue T 1 , positioning scaffold 20 on tissue T 1 with tissue T 1 adjacent to and in contact with upper surface 22 .
  • Adhesive 70 starts bonding to tissue T 1 at discrete zones or points defined by first passages 30 .
  • scaffold 20 is further immobilized on tissue by optional pressure sensitive adhesive disposed on upper surface 22 (not shown).
  • Bottom cover 300 is then removed, optionally by pulling on tab 350 , leaving scaffold 20 on tissue T 1 with adhesive 70 filling first passages 30 and lower surface 24 exposed as shown in FIG. 23D .
  • second tissue T 2 is then brought into contact with lower surface 24 thus sandwiching scaffold 20 between tissues T 1 and T 2 and bringing adhesive 70 contained within first passages 30 into contact also with tissue T 2 .
  • Adhesive 70 establishes a bond at interfaces with tissue T 1 and T 2 and is also polymerized and/or crosslinks inside first passages 30 .
  • tissues T 1 and T 2 which are being adhesively joined are adhesively bound to each other by adhesive 70 at discrete zones or points defined by first passages 30 .
  • tissues T 1 and T 2 are exposed to each other and can establish contact through second passages 40 which are not filled with adhesive 70 .
  • areas of tissues T 1 and T 2 where no bonding has occurred can contact each other and establish healing contact through second passages 40 .
  • scaffold 20 positioned between layers of tissue T 1 and T 2 enables uniform distribution of liquid adhesive for joining the layers of tissue together at discrete fixation points and not over the whole areas of exposed tissues, enabling tissue to tissue contact.
  • liquid or semi-liquid adhesive 70 is polymerized or is cross-linking upon contact with tissues T 1 and T 2 .
  • adhesive 70 is polymerized or is cross-linking after coming in contact with initiators and/or accelerators of adhesive polymerization and/or cross-linking.
  • initiators and/or accelerators can be coated or disposed non-releasably, i.e. immobilized in or on the scaffold 20 while retaining activity to initiate or accelerate polymerization and/or cross-linking.
  • initiators and/or accelerators are disposed releasably, i.e. they can be at least partially released into and mix with flowing adhesive 70 .
  • adhesive 70 is polymerized or is cross-linking after coming in contact with initiators and/or accelerators 60 releasably disposed in first openings 30 , and/or with initiators and/or accelerators 62 releasably disposed on bottom cover 300 .
  • Rapid polymerization and/or crosslinking of adhesive 70 in contact with tissues T and T 2 results in bonding of tissues T 1 and T 2 to each other through scaffold 20 at discrete points of bonding corresponding to first passages 30 and more specifically corresponding to first upper openings 32 and first lower openings 34 .
  • cross-linking or polymerizing of adhesive 70 is initiated once adhesive 70 has advanced into first openings 30 .
  • Adhesive 70 can be any type of biocompatible and rapidly cross-linkable and/or polymerizable compound or mixture of compounds. Rapidly cross-linkable and/or polymerizable means that after initiators or accelerators are added, or after the adhesive is formed from two or more components, it is capable of curing, i.e. cross-linking and/or polymerizing within 0.2 min to about 20 min, more preferably within 0.5 min to 10 min, such as 1, 2, 3, 5 min.
  • adhesive 70 is formed prior to injection into scaffold 20 , for instance by mixing two components contained in separate barrels or a two-barrel syringe, by passing these two components through a mixing tip. In this embodiment, there is no crosslinking initiator or accelerator disposed inside of scaffold 20 . In one embodiment, adhesive 70 is formed by mixing fibrinogen and thrombin together.
  • adhesive 70 comprises fibrinogen, and crosslinking initiator or accelerator disposed inside of scaffold 20 comprises thrombin.
  • the polymerizable adhesive composition may comprise a polymerizable monomeric adhesive.
  • the polymerizable adhesive composition comprises a polymerizable 1,1-disubstituted ethylene monomer formulation.
  • the polymerizable adhesive composition comprises a cyanoacrylate formulation.
  • synthetic polymerizable adhesive materials such as polyurethane, polyethylene glycol, acrylates, glutaraldehyde and biologically based adhesives may be used.
  • Suitable .alpha-cyanoacrylate monomers which may be used, alone or in combination, include alkyl.alpha.-cyanoacrylates such as 2-octyl cyanoacrylate; dodecyl cyanoacrylate; 2-ethylhexyl cyanoacrylate; butyl cyanoacrylate such as n-butyl cyanoacrylate; ethyl cyanoacrylate; methyl cyanoacrylate or other .alpha.-cyanoacrylate monomers such as methoxyethyl cyanoacrylate; 2-ethoxyethylcyanoacrylate; 3-methoxybutyl cyanoacrylate; 2-butoxyethylcyanoacrylate; 2-isopropoxyethyl cyanoacrylate; and 1-methoxy-2-propyl cyanoacrylate.
  • alkyl.alpha.-cyanoacrylates such as 2-octyl cyanoacrylate; dodecyl cyanoacrylate; 2-
  • the monomers are ethyl, n-butyl, or 2-octyl.alpha.-cyanoacrylate.
  • Other cyanoacrylate monomers which may be used include alkyl ester cyanoacrylates, such as those prepared by the Knoevenagel reaction of an alkyl cyanoacetate, or an alkyl ester cyanoacetate, with paraformaldehyde, subsequent thermal cracking of the resultant oligomer and distillation.

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US15/467,239 US20180271505A1 (en) 2017-03-23 2017-03-23 Scaffolds for Joining Layers of Tissue at Discrete Points
JP2019551995A JP7191847B2 (ja) 2017-03-23 2018-03-16 離散した点で組織の層を接合するためのスキャフォールド
AU2018237676A AU2018237676A1 (en) 2017-03-23 2018-03-16 Scaffolds for joining layers of tissue at discrete points
EP18716715.0A EP3600468B1 (fr) 2017-03-23 2018-03-16 Échafaudages permettant de joindre des couches de tissu en des points discrets
CN201880020260.1A CN110461380A (zh) 2017-03-23 2018-03-16 用于在离散点处接合组织层的支架
BR112019019640A BR112019019640A2 (pt) 2017-03-23 2018-03-16 armações para unir camadas de tecido em pontos distintos
PCT/US2018/022834 WO2018175225A1 (fr) 2017-03-23 2018-03-16 Échafaudages permettant de joindre des couches de tissu en des points discrets
US17/021,601 US11980354B2 (en) 2017-03-23 2020-09-15 Scaffolds for joining layers of tissue at discrete points
AU2023202456A AU2023202456A1 (en) 2017-03-23 2023-04-21 Scaffolds for joining layers of tissue at discrete points

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EP3600468A1 (fr) 2020-02-05
AU2018237676A1 (en) 2019-09-05
EP3600468B1 (fr) 2021-06-23
JP2020511259A (ja) 2020-04-16
BR112019019640A2 (pt) 2020-04-14
AU2023202456A1 (en) 2023-05-11
JP7191847B2 (ja) 2022-12-19
US11980354B2 (en) 2024-05-14
US20200405278A1 (en) 2020-12-31
CN110461380A (zh) 2019-11-15
WO2018175225A1 (fr) 2018-09-27

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