US20170265849A1 - Apparatus for delivering a device to a hollow organ - Google Patents

Apparatus for delivering a device to a hollow organ Download PDF

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Publication number
US20170265849A1
US20170265849A1 US15/505,253 US201515505253A US2017265849A1 US 20170265849 A1 US20170265849 A1 US 20170265849A1 US 201515505253 A US201515505253 A US 201515505253A US 2017265849 A1 US2017265849 A1 US 2017265849A1
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United States
Prior art keywords
elongated tube
tubular cover
hollow organ
elastic
distal
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Abandoned
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US15/505,253
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English (en)
Inventor
Boaz ASSAF
Eyal Teichman
Shany KRIMBERG - BAREL
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Colospan Ltd
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Cologuard Ltd
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Priority to US15/505,253 priority Critical patent/US20170265849A1/en
Assigned to Cologuard Ltd. reassignment Cologuard Ltd. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ASSAF, BOAZ, KRIMBERG-BAREL, Shany, TEICHMAN, EYAL
Assigned to COLOSPAN LTD. reassignment COLOSPAN LTD. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: Cologuard Ltd.
Publication of US20170265849A1 publication Critical patent/US20170265849A1/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
    • A61B17/00234—Surgical instruments, devices or methods for minimally invasive surgery
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/12—Surgical instruments, devices or methods for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels or umbilical cord
    • A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
    • A61B17/12027—Type of occlusion
    • A61B17/12036—Type of occlusion partial occlusion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/12—Surgical instruments, devices or methods for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels or umbilical cord
    • A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
    • A61B17/12027—Type of occlusion
    • A61B17/1204—Type of occlusion temporary occlusion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/12—Surgical instruments, devices or methods for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels or umbilical cord
    • A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
    • A61B17/12099—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/12—Surgical instruments, devices or methods for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels or umbilical cord
    • A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
    • A61B17/12131—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device
    • A61B17/12136—Balloons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/02—Holding devices, e.g. on the body
    • A61M25/04—Holding devices, e.g. on the body in the body, e.g. expansible
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M27/00—Drainage appliance for wounds or the like, i.e. wound drains, implanted drains
    • A61M27/002—Implant devices for drainage of body fluids from one part of the body to another
    • 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
    • A61B17/1114—Surgical instruments, devices or methods for performing anastomosis; Buttons for anastomosis of the digestive tract, e.g. bowels or oesophagus
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/00234—Surgical instruments, devices or methods for minimally invasive surgery
    • A61B2017/00292—Surgical instruments, devices or methods for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
    • A61B2017/00336—Surgical instruments, devices or methods for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means with a protective sleeve, e.g. retractable or slidable
    • 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
    • A61B2017/1132—End-to-end connections
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/12—Surgical instruments, devices or methods for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels or umbilical cord
    • A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
    • A61B2017/1205—Introduction devices
    • 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
    • A61F2002/045—Stomach, intestines
    • 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
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0063—Three-dimensional shapes
    • A61F2230/0065—Three-dimensional shapes toroidal, e.g. ring-shaped, doughnut-shaped
    • 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
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0003—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having an inflatable pocket filled with fluid, e.g. liquid or gas

Definitions

  • the resent invention relates to an apparatus for delivering a device into a hollow organ.
  • Embodiments of the present invention relate to an apparatus for delivering and deploying an intra-luminal sheath for bypassing an anastomosis site in a colon.
  • Surgical intervention can require an operative union of resected tissues or a bypass of non-resected diseased tissue.
  • Such union procedures which are termed anastomosis, can be performed via open or minimal invasive surgery where the ligated ends are manually sutured or stapled using a surgical stapler. While an anastomosis may be end-to-end, it could also be performed side-to-side or end-to-side depending on the required reconstruction or bypass.
  • Anastomosis can be performed on vascular structures, the gastrointestinal (GI) tract (including esophagus, stomach, small bowel, large bowel, bile ducts, and pancreas), and the urinary tract (including ureters, urinary bladder and urethra).
  • GI gastrointestinal
  • Surgical anastomosis is a common procedure, in particular in the gastrointestinal (GI) tract. Virtually all elective resections of gastrointestinal organs are followed by anastomoses to restore continuity.
  • GI gastrointestinal
  • GI anastomosis carry a relatively high risk of anastomotic leaks especially in subjects that are immuno-compromised, such as subjects undergoing chemotherapy. Such leaks must be identified in a reasonable amount of time to allow for medical intervention.
  • sheaths which bypass the anastomotic site have been devised. Such sheaths are typically delivered via dedicated catheters and anchored above(upstream) the anastomotic site thereby supporting the flow of material to circumvent or bypass the anastomosis site.
  • the present inventors While reducing the present invention to practice, the present inventors have devised an apparatus which can be used to deliver an intra-luminal sheath to the anastomosis site without causing tissue trauma during delivery or anchoring.
  • an apparatus for delivery of a device into a hollow organ comprising: (a) an elongated tube having proximal and distal openings and being configured for carrying the device on a distal portion thereof; and (b) a tubular cover for covering at least a portion of the device when mounted on the elongated tube, the tubular cover being radially elastic and axially non-elastic; the tubular cover being retrievable into the elongated tube through the distal opening, such that when the device is mounted on the elongated tube and covered by the tubular cover, retrieval of the tubular cover into the elongated tube uncovers the device for delivery into the hollow organ.
  • the apparatus further comprises an additional elongated tube positioned within the elongated tube and being attached to the tubular cover structure, wherein the tubular cover is retrievable into the elongated tube by pulling the additional elongated tube against the elongated tube.
  • the elongated tube includes a hollow nose cone forming the distal opening.
  • tubular cover is fabricated from an elastic material having non-elastic axial elements.
  • the elastic material is an elastic polymer.
  • a proximal end of each of the elongated tube and the additional elongated tube is attached to a user-operable handle.
  • the device is mounted on a distal portion of the elongated tube.
  • the apparatus further comprises a fluid conduit for delivering friction-reducing composition to a distal portion of the elongated tube.
  • the conduit is removably attached to the elongated tube.
  • a distal opening of the fluid conduit is positioned such that the friction-reducing composition is delivered between the tubular cover and the device when the device is mounted on the elongated tube.
  • the friction-reducing composition is an oil or a water -based lubricant.
  • a method of delivering a device into a hollow organ comprising: (a) delivering into the hollow organ an elongated tube having proximal and distal openings, the elongated tube having the device mounted thereupon and being at least partially covered by a tubular cover being radially elastic and axially non-elastic; (b) retrieving the tubular cover into the elongated tube through the distal opening thereby uncovering the device; and (c) pulling the elongated tube in a proximal direction to thereby deliver the device to the hollow organ.
  • tubular cover is attached to an additional elongated tube positioned within the elongated tube and further wherein (b) is effected by pulling the additional elongated tube against the elongated tube.
  • tubular cover is fabricated from an elastic material having non-elastic axial elements.
  • the device is a tubular sleeve having at least one toroidal balloon and further wherein the toroidal balloon is inflated to anchor the tubular sleeve in the hollow organ prior to, or following (c).
  • the hollow organ is a colon and the tubular sleeve is at least 200 mm in length.
  • the hollow organ is a colon and further wherein (a) is effected by delivering the tubular sleeve through the anal orifice.
  • At least one toroidal balloon is inflated via an inflation conduit having an inflation port positioned outside the body.
  • the method further comprising delivering a friction-reducing composition to a distal portion of the elongated tube prior to (b).
  • the delivering is effected via a fluid conduit having a distal opening positioned at the distal portion of the elongated tube.
  • a distal opening of the fluid conduit is positioned such that the friction-reducing composition is delivered between the tubular cover and the device.
  • the friction-reducing is an oil or a water -based lubricant.
  • the present invention successfully addresses the shortcomings of the presently known configurations by providing a delivery apparatus that can be used to deliver a device into a hollow organ.
  • FIG. 1 illustrates the present delivery apparatus with an intraluminal device mounted thereupon and covered by a tubular cover.
  • FIG. 2 a illustrates the delivery apparatus of FIG. 1 without the intraluminal device.
  • FIG. 2 b illustrates the tubular cover with attached/integrated longitudinal struts.
  • FIG. 3 illustrates the delivery apparatus of FIG. 1 with the intraluminal device mounted thereupon and the tubular cover partially withdrawn into the lumen of the delivery apparatus through the distal opening of the elongated (outer) tube.
  • FIG. 4 illustrates the delivery apparatus of FIG. 1 with the tubular cover drawn into the lumen through the distal opening of the elongated (outer) tube.
  • FIG. 5 illustrates a fluid a conduit for delivering a friction-reducing composition to the distal portion of the delivery apparatus.
  • FIGS. 6 a - h illustrate delivery and deployment of an intraluminal device in a colon using the delivery apparatus of the present invention.
  • FIG. 7 illustrates a prototype of a delivery apparatus which includes a longitudinally elastic tubular cover. As is shown by this Figure, pulling of handle proximally stretches the tubular cover longitudinally and prevents release of the device from the delivery apparatus.
  • FIG. 8 illustrates a prototype system including a delivery apparatus (A), a movement limiting band (B) and anastomosis shield device (C).
  • the present invention is of an apparatus which can be used to deliver a device into a hollow organ. Specifically, the present invention can be used to deliver a device for bypassing an anastomosis site in a hollow organ such as a colon.
  • anastomosis protection devices for internally bypassing an anastomosis site.
  • Such protection devices employ internally anchored sleeves (e.g. U.S. 20100010517, U.S. 20100010518) or externally clamped sleeves (e.g. U.S. Pat. No. 3,435,823, U.S. 20050033226) for routing feces and isolating it from the anastomosis site.
  • bypass devices provide a promising alternative to fecal diversion procedures, they have yet to meet clinical acceptance largely due to complications associated with sleeve-tissue anchoring and sleeve placement and removal.
  • U.S. Pat. No. 8,690,817 to the present inventors discloses a unique anastomosis bypass device that includes several expandable toroidal balloons.
  • the balloons stabilize the device against the inner walls of the colon and provide sealing thereagainst, while an externally mounted band (surrounding the colon) limits movement of the intraluminal device within the colon.
  • the present inventors have devised a delivery apparatus which can be used to deliver and deploy an intraluminal device such as that described in US8690817.
  • an apparatus for delivery of a device into a hollow organ is provided.
  • the phrase “hollow organ” refers to any hollow tissue structure that serves as a conduit for biological material. Examples include the GI tract, including the esophagus, stomach and intestines, the urinary tract, including the ureters, bladder and urethra, and the vascular system including arteries, veins and the like.
  • biological material includes, but is not limited to, feces, urine, blood and the like.
  • the delivery apparatus of the present invention includes an elongated tube (also referred to herein as “outer tube”) having proximal and distal openings; the outer tube is configured for carrying the deliverable device thereupon.
  • the delivery apparatus further includes a tubular cover for covering at least a portion of the device when mounted on the outer tube.
  • the tubular cover is retrievable into the outer tube through the distal opening, such that when the device is mounted on the outer tube and covered by the tubular cover, retrieval of the tubular cover into the outer tube uncovers the device for delivery into the hollow organ.
  • tubular cover of the present delivery apparatus was designed with radial elasticity and axially rigidity (inelasticity).
  • the radial elasticity enables the tubular cover to closely hug and apply compressive (packing) forces on the deliverable device or a portion thereof, while the longitudinal (axial) rigidity (non-elasticity) prevents longitudinal stretching of the tubular cover when pulled into the outer tube through the distal opening thereof.
  • the tubular cover is pulled into the outer tube by an additional elongated tube (also referred to herein as “inner tube”) which is disposed within the outer tube and is attached to the distal portion of the tubular cover. Pulling of the inner tube with respect to the outer tube pulls the tubular cover in a distal direction into the distal opening of the outer tube thereby uncovering the distal portion of the outer tube (on which a deliverable device is mounted.
  • inner tube also referred to herein as “inner tube”
  • FIGS. 1-5 illustrate one embodiment of the present apparatus which is referred to herein as apparatus 10 .
  • Apparatus 10 includes an outer tube 12 that is disposed over an inner tube 14 (not visible, indicated with dotted line).
  • Outer tube 12 can be fabricated from PTFE, Nylon, Pebax, or any other thermoplastic/elastic polymer (with or without braid reinforcement), or a metal (e.g. stainless steel or Nitinol).
  • Outer tube 12 can be thin (wall thickness of 0.5-1 mm or less) or slotted to allow flexibility and yet provide pushability.
  • the outer diameter (OD) of outer tube 12 can be 3-7 mm while the inner diameter (ID) can be 2-6 mm.
  • Outer tube can be fabricated via extrusion or any other suitable fabrication approach.
  • Inner tube 14 can be fabricated via, for example, extrusion using the materials described above. Inner tube 14 can have an OD of 2-6 mm and an ID of 0.1-1 mm.
  • At least a distal portion 13 of outer tube 12 is configured for carrying a deliverable device.
  • Device 15 shown in FIGS. 1, 3 and 5 is configured for bypassing/shielding colon anastomosis sites and is about 200-500 cm in length. As such, device 15 is disposed over the length of outer tube 12 , with only a tissue-anchoring segment thereof (having two toroidal anchoring balloons 19 shown in FIGS. 3 and 5 ) being covered by tubular cover 24 . However, shorter devices can be mounted over distal portion 13 and be completely covered by tubular cover 24 .
  • Apparatus includes handle 16 having two portions, a proximal portion 20 which is connected to inner tube 14 and a distal portion 18 which is connected to outer tube 12 .
  • Handle portion 18 and 20 can be fabricated via machining, 3D printing or molding using a variety of polymers and/or alloys (e.g. POM-C, ABS, polycarbonate, stainless steel etc.)
  • Handle 16 can be 100-200 mm in length and 15-45 mm in diameter.
  • Proximal portion 20 can be pulled against distal portion 18 to thereby pull inner tube 14 with respect to outer tube 12 .
  • Handle 16 includes a safety mechanism 26 (e.g. a removable pin, a movable element, a ratchet mechanism or the like) for preventing inadvertent pulling of portion 20 with respect to portion 18 when apparatus 10 is used.
  • a safety mechanism 26 e.g. a removable pin, a movable element, a ratchet mechanism or the like
  • Distal end 22 of inner tube 14 is connected to a tubular cover 24 ( FIG. 2 a ) which is configured for partially or fully covering a deliverable device (partial covering is shown with device 15 of FIG. 1 ).
  • a tubular cover 24 FIG. 2 a
  • Tubular cover 24 can be partially or completely pulled into outer tube 12 (partial withdrawal into outer tube 12 shown in FIG. 3 ).
  • a graduated scale 17 FIGS. 3 and 4 ) disposed within handle 16 can become visible as portion 20 is pulled to indicate the portion (in percent or mm) of tubular cover withdrawn into outer tube 12 .
  • Tubular cover 24 is a radially elastic, longitudinally rigid tubular structure which is capable of elastically stretching radially to accommodate device 15 and apply a compressive force thereupon.
  • Tubular cover 24 can be fabricated from nylon, silicone, latex, rubber, polyurethane or the like with a radial compliance of 10-100%. Fabrication can be effected using common approaches such as dipping, blow molding, casting, extrusion or the like.
  • tubular cover 24 The longitudinal rigidity of tubular cover 24 is provided by longitudinal reinforcement, e.g. axial elements, such as struts 25 which are attached to, or integrated into tubular cover 24 ( FIG. 2 b ).
  • Struts 25 can be embedded into tubular cover 24 during manufacturing (dipping, over molding) or joined thereto via gluing, sandwiching (dual layer) or the like.
  • Struts 25 can be attached to distal connector 29 of tubular cover 24 which is in turn connected to (glued/welded) inner tube 14 .
  • struts 25 can be provided in or on tubular cover 24 .
  • 4-8 struts spanning the length of tubular cover 26 can be arranged around the circumference thereof in symmetrical or non-symmetrical spacing.
  • Struts 25 can span the entire length of tubular cover 26 or a portion thereof (e.g. 70-95%).
  • Struts 25 can be configured to provide longitudinal rigidity only under pulling forces, since tubular cover 24 is pulled to uncover the delivered device.
  • struts 25 can be fabricated as strings (single filament of braided), or ribbons from inelastic polymers such as nylon, PLA or PEEK, or from natural materials such as silk or cotton.
  • Struts 25 can also be fabricated from rigid materials such as, alloys (stainless steel) and the like.
  • the axial compliance of struts 25 is less than 20%, preferably less than 10%.
  • FIG. 4 illustrates apparatus 10 without device 15 and with tubular cover 24 partially withdrawn into outer tube 12 showing distal portion 13 and nose cone 28 .
  • Nose cone 28 is shaped to facilitate delivery of apparatus 10 into the hollow organ and to enable easy retraction thereof.
  • nose cone 28 also facilitates collection of tubular sheath (which slides thereupon) into outer tube 12 .
  • Nose cone 28 is preferably fabricated from low friction materials such as Teflon or Delrin.
  • Nose cone 28 also functions as a distal stop to prevent any distal movement of the device carried on outer tube 12 during unsheathing of tubular cover 24 .
  • FIG. 5 illustrates apparatus 10 with tubular cover 24 partially covering device 15 mounted on outer tube 12 and a conduit 30 disposed between handle 16 and distal portion 13 .
  • Conduit 30 includes a proximal opening 32 and distal opening 34 .
  • Conduit 30 can be used to deliver a friction reducing compound to distal portion preferably under tubular cover 24 within a space between tubular cover 24 and device 15 .
  • a friction reducing compound can be water or oil-based and can include glycerin and hydroxyethyl cellulose lubricants.
  • the friction reducing compound can be facilitated by a syringe or pump connected to proximal opening 32 via, for example, a Luer lock mechanism.
  • the friction reducing compound can decrease friction caused by contact of inner walls of tubular cover 24 and outer walls of device 15 to thereby facilitate unsheathing of device 15 (via withdrawal of tubular cover 24 into outer tube 12 ).
  • Delivery of the friction reducing compound can be effected prior to positioning of apparatus 10 carrying device 15 in the hollow organ, or following such positioning and prior to pulling of inner tube 14 with respect to outer tube 12 .
  • Apparatus 10 can be used to deliver any intraluminal device into any hollow organ.
  • One preferred device deliverable by apparatus 10 is the anastomosis bypass device described in U.S. Pat. No. 8,690,817 and generally shown in FIGS. 1, 3 and 5 .
  • Such a device is a tubular sleeve constructed from silicone, PTFE, DacronTM or latex or any other suitable material and having dimensions in the range of 250-500 mm length, 25-50 diameter and 0.05-1 mm wall thickness.
  • the movement of the tubular sleeve within the hollow organ is limited via an externally mounted movement-limiting element which is preferably configured as a band loosely encircling the hollow organ.
  • the sleeve includes an upstream opening for receiving the biological material transported through the hollow organ and downstream opening which serves as an exit point for the biological material.
  • the sleeve can include two distinct functional portions.
  • a first (distal) portion functions in stabilizing the sleeve within the hollow organ and sealing it with respect to the hollow organ inner walls, thus serving as the entry portion for the biological material.
  • the first portion is preferably more rigid in nature and can be shaped to facilitate movement of the biological material from the hollow organ and into the sleeve.
  • the first portion of the sleeve is preferably constructed from silicone (Shore A 30-80), with a thickness of 0.1-0.6 mm and configured with an external diameter of 30-60 mm, and a length of 25-100 mm.
  • This portion can also include stabilizing struts and inflatable external balloons for anchoring and stabilization.
  • the diameter of the first portion can increase slightly under internal pressure exerted by passage of biological material, such increase is typically no more than 5-15% of the fully open diameter.
  • a second (proximal) portion of the sleeve can function in directing the biological material moving through the sleeve into a portion of the hollow organ downstream of the anastomosis site and/or outside the body.
  • this portion of the sleeve is designed to contain the biological material while providing some accommodation for volume and movement.
  • the second portion of the sleeve can be elastic and flimsy and is preferably constructed from a silicone material (Shore A value of 5-40) and a thickness of 0.05-0.3 mm.
  • the second portion of the sleeve can range in length from 150-450 mm and 20-40 mm in diameter when fully open.
  • the second portion of the sleeve when utilized in bypassing a low colorectal anastomosis, the second portion of the sleeve can be 150-350 mm in length when fully deployed.
  • the first portion is preferably contiguous with the second portion and is thus fabricated as one unitary structure or assembled from two irreversibly attached portions (using for example, adhesives, mechanical fasteners and the like) which are assembled prior to positioning.
  • the first portion can also include a mechanism for further stabilizing the sleeve in the hollow organ and limiting its movement against the externally mounted movement-limiting element.
  • Such a mechanism can include an expandable structure which can be used for increasing the external diameter of the first portion following deployment.
  • expandable structure which can be used for increasing the external diameter of the first portion following deployment.
  • examples include, stent-like bands which are expanded following deployment, compressed foam-like elements (disposed as a ring or discrete ‘blocks’ around the outer circumference of the first portion).
  • Expansion of such mechanisms can be effected by releasing a constraining mechanism such as a sheath or a pull-string.
  • a constraining mechanism such as a sheath or a pull-string.
  • a stent like band cut out of a Nitinol or stainless steel tube or braided from Nitinol or stainless steel wire
  • OD outer diameter
  • ID internal diameter
  • a presently preferred expandable structure includes one or more (e.g. 2 or 3) inflatable structures (balloons/bladders/sacs) disposed as a ring (e.g. toroidal balloons) or a plurality of discrete inflatable structures around the outer circumference of the first portion.
  • inflatable structures balloons/bladders/sacs
  • a ring e.g. toroidal balloons
  • discrete inflatable structures around the outer circumference of the first portion.
  • Inflation of such an inflatable structure can be effected via an inflation conduit disposed within a sidewall of the sleeve.
  • an inflation conduit disposed within a sidewall of the sleeve.
  • such conduit can run the length of the sleeve from the distal opening to the inflatable structure(s), or it can traverse only a portion of this length (e.g. 100-400 mm).
  • the system of the present invention also includes a movement-limiting element for limiting the movement of the sleeve and preventing the first portion thereof from migrating past the anastomosis site (in a direction of flow through the hollow organ).
  • a movement-limiting element is a band encircling the outer surface of the hollow organ. It will be appreciated that such a band need not completely encircle the hollow organ; as such it can be an open band covering, for example, about 270 degrees of the circumference of the hollow organ.
  • a presently preferred configuration of the band is configured such that no substantial radial force is applied to the hollow organ when in use. Such a configuration negates the possibility of tissue ischemia and necrosis especially when the hollow organ is, for example, a colon which distends when fecal matter passes there through.
  • a hollow organ such as a colon is designed to radially expand in order to accommodate passage of feces during peristalsis (about 3-4 times per day). Such expansion can increase the diameter of a colon from 3 to 6 cm.
  • a band positioned in close contact with the outer wall of the colon can apply inward pressure on the wall tissue when the colon expands during passage of feces. Such pressure can lead to tissue ischemia and necrosis and or to tissue erosion dues to both compressive forces and axial forces and frictional forces that result from axial movement of the colon with respect to the band.
  • the band of the present invention can be configured to closely encircle the hollow organ and elastically expand when the organ expands, or alternatively and preferably the band can be configured with a diameter slightly smaller than that of the expanded organ (e.g. about 15-30% smaller), but larger than that of the relaxed state of the hollow organ (e.g. about 15-30% larger).
  • the band can be fabricated with an internal diameter of 30 -50 mm and a substantially rigid (e.g. 10% compliance) internal circumflex.
  • the distal portion of the (internal) sleeve is relatively rigid (as described above), it may limit organ radial expansion at the site around and distally to the anastomosis and thus reduce contact forces/pressures between the organ outer wall and the band inner diameter.
  • the band limits movement of the sleeve (specifically the first portion of the sleeve) by functioning as a stop for the first portion of the sleeve (e.g. a stop for the balloon or balloon inflated around the first portion of the sleeve).
  • a band having an internal diameter of 40mm would function as a movement stop for a sleeve which includes a first portion having an external diameter of 50 mm and yet such a band would not apply compressive forces to the outer colon wall.
  • the band is preferably located at or above the anastomosis site.
  • the band is secured to the tissue at the desired site via anchors, adhesive, sutures and the like. Such securement can be to the outer wall of the hollow organ or to tissues adjacent thereto.
  • the band can be located about 50-100 mm above (upstream) the anastomosis and axially secured in place by threading the band through the colon mesentery.
  • the band is delivered as a linear strip and closed to a circle around the hollow organ using, for example, a latch, a suture, a lasso suture around the band or other locking mechanisms. Delivery of the band is preferably effected through an incision in the abdominal wall.
  • the diameter of the band can be adjustable prior to or following positioning using, for example, a ratchet concept in which the relatively stiff outer rim of the band is tuned and locked to a diameter that will allow the above defined gap between the colon and the internal “relatively soft” inner band material or a Lasso concept in which the diameter of the ring is limited (and changed) by a “suture” going around the soft inner ring material. In that concept shortening of the suture length will decrees the ring OD.
  • FIGS. 6 a - h Delivery of a device 15 into a hollow organ using apparatus 10 is exemplified by FIGS. 6 a - h which illustrate delivery of an anastomosis bypass device into a colon.
  • Apparatus 10 with a mounted device is inserted through the anus and advanced to the anastomosis site until the distal end is located proximal to the external ring ( FIG. 6 a ).
  • a safety pin locking portion 20 to portion 18 is removed and the handle is pulled proximally withdrawing the tubular cover and exposing the device ( FIGS. 6 b - d ).
  • each balloon of the device is inflated with 15 ml of saline using a standard 20 ml syringe positioned outside the body ( FIG. 6 e ). Once the balloons are inflated, apparatus 10 is completely withdrawn from the colon/rectum via gentle pulling ( FIGS. 6 f - g ) leaving the device anchored in position in the colon ( FIG. 6 h ).
  • a delivery apparatus prototype constructed having an elastic tubular cover was evaluated in pigs.
  • FIG. 7 illustrates a deployed delivery apparatus outside the body, stretched cover indicated by arrow) preventing release of the device from the delivery apparatus.
  • the present inventors fabricated an improved prototype having a tubular cover which is radially elastic and longitudinally inelastic.
  • This improved prototype was evaluated in 16 animal trials (pigs) and results showed that the tubular cover was easily withdrawn into the elongated outer tube of the apparatus to uncover the device and enable delivery thereof.
  • FIG. 8 A prototype of the present delivery device was tested in human subjects ( FIG. 8 ).
  • a single arm open label study was conducted in order to evaluate safety, tolerability and performance profile of the present delivery apparatus and the intraluminal device delivered thereby (described in U.S. Pat. No. 8,690,817) in patients undergoing colorectal surgery.
  • the objectives of this study were to assess the performance of the delivery apparatus and the device delivered thereby.
  • the device was deployed in the anastomosis site as follows.
  • the external ring/band (B) was positioned around the colon upstream of the anastomosis site during the open part of the procedure when the resected bowel was pulled out of the abdominal wall through a small incision.
  • the delivery apparatus (A) with a mounted device (C) was inserted through the anus and advanced to the anastomosis site until the distal end of the delivery apparatus was located upstream of the external ring (B).
  • the handle of the delivery apparatus was unlocked and pulled proximally to withdraw the tubular cover and expose the device.
  • each balloon of the device was inflated with saline using a standard 20 ml syringe positioned outside the body. Once the balloons were inflated, the delivery apparatus was completely withdrawn from the colon/rectum via gentle pulling leaving the device anchored in position in the colon.
  • Type of surgery was diverse and included 2 open surgeries, 9 laparoscopic surgeries, 1 Robotic surgery converted to open and 1 robotic converted to lap. In all cases, delivery of the device was through the anal orifice.
  • the average duration of the surgical procedure was 231 minutes (range, 125-332 min).
  • Application and deployment of the device added a median of 7 minutes to the procedure (range 5-21 min).
  • the median distance from the anal verge to the anastomosis was 5 cm (range, 2-14).
  • Post-surgery activities included a daily evaluation of subject's clinical state and assessments/record of temperature, passing flatus and bowel movements, concomitant medications (with focus on laxative, antibiotics, parenteral narcotics, or oral analgesic), food intake tolerability (liquid/solid) and catheter use.
  • the application of the device can be performed easily by any surgeon experienced in colorectal anastomoses procedures, with median application time of 7 minutes (5-21) vs. stoma formation 15 minutes (10-30).

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ES2743490T3 (es) 2020-02-19
CN107148257B (zh) 2019-01-22
EP3206634A2 (en) 2017-08-23
JP2017535322A (ja) 2017-11-30
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BR112017006009A2 (pt) 2017-12-19
WO2016059634A2 (en) 2016-04-21
IL251454A0 (en) 2017-05-29
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IL251454B (en) 2021-08-31
US20200146663A1 (en) 2020-05-14

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