Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B17/00—Surgical instruments, devices or methods
  • A61B17/32—Surgical cutting instruments
  • A61B17/3205—Excision instruments
  • A61B17/3207—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B17/00—Surgical instruments, devices or methods
  • A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
  • A61B2017/22094—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for for crossing total occlusions, i.e. piercing
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
  • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
  • A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • 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
  • A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
  • A61M2025/0042—Microcatheters, cannula or the like having outside diameters around 1 mm or less
• • 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
  • A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
• • 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
  • A61M29/00—Dilators with or without means for introducing media, e.g. remedies
  • A61M29/02—Dilators made of swellable material

Definitions

• This disclosure relates to systems and apparatus for treating humans via allopathic or surgical intervention, minimally invasive surgical practices, endovascular procedures, percutaneous procedures, and related medical procedures. Specifically, this disclosure relates to systems for addressing vessel lumen-based issues and treatment of occlusions within a body, including those related to peripheral vascular disease states, cardiovascular diseases, cerebrovascular diseases, and others.
• a crossing device comprising, in combination: a body coupled to a microcatheter at a proximal end of the microcatheter; a handle coupled to a blade at a proximal end of the blade, the blade disposed within a lumen of the microcatheter; wherein a sharpened tip of the blade is configured to advance from a natural position within the lumen of the microcatheter to an extended position beyond a distal end of the microcatheter as the handle is advanced relative to the body.
• the crossing device may further comprise a spring configured to compress as the handle is advanced relative to the body; wherein the spring is configured to expand and retract the blade relative to the microcatheter as the handle is released.
• the crossing device may further comprise a luer configured to attach to a proximal end of the handle and provide adaptable use of a supplemental treatment device in combination with the crossing device.
• the luer may be configured to guide a supplemental treatment device to the lumen of the microcatheter or a lumen of the blade.
• the supplemental treatment device may be at least one of: a guidewire, a PTA balloon, and a stent device.
• the tip of the blade may be disposed at a distal end of the blade and is of a rigid material.
• the tip of the blade may be a hollow, sharpened, everted tip.
• the handle and the body may be configured to limit the expansion of the spring and provide the natural position of the blade and further configured to selectively lock the blade in at least one of the natural position and the extended position.
• the body may further comprise a nose detachable from the body and secured to the microcatheter, such that the microcatheter is selectively removable from the body.
• an improved surgical method for addressing blockage within a vessel comprising, in combination: delivering an apparatus including at least a microcatheter to a desired treatment situs; positioning the microcatheter having at least a blade proximate to a surface of an occlusion, wherein the microcatheter is attached to a body and comprises a lumen; providing the blade within the lumen of the microcatheter to the surface of the occlusion, wherein the blade is attached to a handle; advancing the blade to an extended position by manipulation of the handle relative to the body; and retracting the blade to a natural position by releasing the handle.
• the blade may be retracted by a spring between the handle and the body.
• the method may result in reconfiguration of at least a portion of the occlusion, whereby a different flow condition may be achieved.
• the method may further comprise advancing the microcatheter and the blade through a channel created by advancement of the blade to an extended position.
• the method may further comprise providing a supplemental treatment device to the occlusion through a lumen of the blade.
• the supplemental treatment device may be at least one of a guidewire, a PTA balloon, and a stent device.
• a kit comprising: a crossing device further comprising: a body coupled to a microcatheter at a proximal end of the microcatheter; a handle coupled to a blade at a proximal end of the blade, the blade disposed within a lumen of the microcatheter; wherein a sharpened tip of the blade may be configured to advance from a natural position within the lumen of the microcatheter to an extended position beyond a distal end of the microcatheter as the handle is advanced relative to the body; and directions for use.
• the kit may further comprise a supplemental treatment device configured to be advanced within the lumen of the microcatheter.
• the kit may further comprise a luer disposed at a proximal end of the handle and configured to guide the supplemental treatment device into the lumen of the microcatheter.
• the supplemental treatment device may be at least one of: a guidewire, a PTA balloon, and a stent device.
• a system for addressing obstructions within lumens comprising, in combination: a body coupled to a microcatheter at a proximal end of the microcatheter; a handle coupled to a blade at a proximal end of the blade, the blade disposed within a lumen of the microcatheter; a luer configured to attach to a proximal end of the handle and provide adaptable use of a supplemental treatment device in combination with the crossing device; a spring configured to compress as the handle is advanced relative to the body; wherein a tip of the blade may be configured to advance from a natural position within the lumen of the microcatheter to an extended position beyond a distal end of the microcatheter as the handle is advanced relative to the body; wherein the spring may be configured to expand and retract the blade relative to the microcatheter as the handle is released.
• Figure 1A is a schematic view of an embodiment of a crossing device in a natural position, according to embodiments of the present disclosure
• Figure 1 B is a schematic view of an embodiment of a crossing device in an extended position, according to embodiments of the present disclosure
• Figure 2A is a schematic view of an embodiment of a crossing device in a natural position, according to embodiments of the present disclosure
• Figure 2B is a schematic view of an embodiment of a crossing device in an extended position, according to embodiments of the present disclosure
• Figure 3 is an exploded view of an embodiment of a crossing device, according to embodiments of the present disclosure.
• Figure 4 is a cross-sectional view of an embodiment of a crossing device, according to embodiments of the present disclosure.
• Figure 5A is a schematic view of an embodiment of a blade of a crossing device, according to embodiments of the present disclosure.
• Figure 5B is a schematic view of an embodiment of a blade of a crossing device, according to embodiments of the present disclosure.
• the present inventors have discovered that treatment of conditions, including chronic total occlusions, remain challenged by the paucity of extent devices. Namely, surgeons require improved apparatus to impact, address, and ameliorate occlusions by thrombi, emboli, and other obstructions in real time during procedures.
• the inventors of the present disclosure have invented and reduced to practice improved systems, comprised of devices and methods for ablating, crossing, or cutting an occlusion including known constraints of managing fluid-flow and other access issues within a body, particularly in the lumen of vessels.
• the devices and methods discussed herein may be employed for medical treatment and in conjunction with other devices and methods for medical treatment, as known to those skilled in the art.
• a lumen of a blood vessel or other fluid-bearing vessel may become occluded.
• a chronic total occlusion ("CTO") or other partial or total obstruction of a blood vessel may occur or be the result of a thrombus, an embolism, atherosclerosis, or other disease that results in a blockage, restriction, or occlusion of fluid flow within a body.
• CTO chronic total occlusion
• Endovascular procedures include angioplasty procedures, stent placement, various scope procedures, and plethoric diagnostic, intermediary and interlocutory clot addressing schemes, which may include temporarily or permanently emplaced devices.
• An occlusion may include a fibrous cap, composed of lipids, endothelial cells, macrophages, smooth muscle cells, foam cells, connective tissue, and other vascular materials.
• An occlusion may include calcification, such that the occlusion becomes hardened.
• various endovascular procedures including thrombectomy, angioplasty, stent placement, retrieval of an obstruction, and others may be complicated or prevented by the difficulty or inability to penetrate the occlusion. For example, such procedures may require at least partial penetration of an occlusion before the procedure may be commenced or completed. Often, establishing some degree of reperfusion is critical.
• crossing device 1 may include body 13, microcatheter 21 , handle 12, and blade 16. According to embodiments, crossing device 1 allows for a handheld mechanical penetration of an occlusion. Surgeons and interventionalists have expressed ongoing needs for devices leveraging their "hand" or feel for manipulating devices in situ.
• body 13 may be attached to microcatheter 21
• handle 12 may be attached to blade 16, such that handle 12 is moveable relative to body 13, and movement of handle 12 relative to body 13 causes advancement and retraction of blade 16 along the inner portion of microcatheter 21 .
• Figs. 1A and 2A show crossing device 1 in a natural position, with handle 12 and blade 16 retracted;
• Figs. 1 B and 2B show crossing device 1 in an extended position, with handle 12 and blade 16 extended.
• handle 12 may include or be combined with one or more of luer 1 1 , plunger rod 14, hypo support 15, and blade 16.
• handle 12, luer 1 1 , plunger rod 14, hypo support 15, and blade 16 may be combined to form an integrated unit.
• One or more interfaces e.g., threading, etc.
• fixations e.g., adhesive, epoxy, etc.
• body 13 may include or be combined with one or more of nose guide 19, nose 18, heat shrink 20, and microcatheter 21 .
• nose guide 19, nose 18, heat shrink 20, and microcatheter 21 may be combined to form an integrated unit.
• One or more interfaces e.g., threading, etc.
• fixations e.g., adhesive, epoxy, etc.
• spring 17 may be disposed between at least a portion of handle 12 and at least a portion of body 13.
• spring 17 extends between plunger rod 14— which is attached to handle 12— and nose guide 19— which is attached to body 13.
• spring 17 may tend to separate handle 12 from body 13 by way of elastic expansion.
• Handle 12 and body 13 may be configured to set a limit on the separation.
• plunger rod 14 may include a flange that contacts a portion of body 13 to prevent travel along the axis beyond a certain point.
• nose 18 may be separate from and attachable to nose guide 19. Nose 18 may be fixably attached to microcatheter 21 and removably attached to nose guide 19, such that a microcatheter may be exchanged by removing nose 18. Such an option avoids the need to replace an entire system for need of a new microcatheter.
• crossing device 1 may facilitate use of a guidewire.
• Blade 16 may be configured with a hollow inner portion to allow a guidewire to be advanced from a proximal end of blade 16 to a distal end of blade 16.
• a guidewire lumen within blade 16 may be configured to accommodate any guidewire used for general vascular surgical procedures, such that a separate or distinct guidewire is not required for operation of crossing device 1 .
• Such technology is known in the art, and incorporated herein by reference are the following U.S. patent applications and publications: U.S. Patent No. 6,066,149, U.S. Patent No. 5,972,019, U.S. Patent No. 5,695,469, U.S. Patent No. 6,506,178, U.S. Patent No.
• a luer 1 1 may be configured to interface with handle 12, as shown in Figs. 3 and 4.
• Luer 1 1 may be a detachable hub/luer device configured to direct devices to microcatheter 21 .
• Luer 1 1 may facilitate use of a support catheter, PTA balloon catheter, guidewire, or another lumen-configured or catheter-based supplemental treatment device to be exchanged with components of crossing device 1 during use, without removal of crossing device 1 from a patient.
• Such a configuration provides the ability to operate crossing device 1 in tandem or in sequence with other devices intended to deliver treatment to the same or nearby location.
• devices advanced within the lumen of blade 16 or otherwise provided through luer 1 1 may be operated, manipulated, and moved either along with or independent of handle 12, body 13, or their associated attached components.
• blade 16 may be configured to penetrate an occlusion upon contact with the occlusion.
• the distal end of blade 16 may include one of a variety of shapes to facilitate addressing the occlusion. Examples are shown in Figs. 5A and 5B.
• blade 16 may include an everted end, an end with a sharpened tip, a concave end, a convex end, a coring tip, or other geometry to address an occlusion.
• Blade 16 may be hollow or solid.
• microcatheter 21 and blade 16 may provide sufficient flexibility to provide trackability within vessels of a patient. Microcatheter 21 and blade 16 may also provided sufficient rigidity to adequately transfer translational and rotational forces to be responsive at a distal end to a user located at a proximal end. According to embodiments, a tip at a distal end section of blade 16 may be relatively rigid, to provide a force of impact to an occlusion upon extension of the same.
• blade 16 may be configured to provide rotational motion at the point of deployment (e.g., at or near the distal end of crossing device 1 ). For example, as a user provides torque to handle 12, the torque may be translated along blade 16 to the distal end of blade 16. A torque provided at the distal end may improve treatment of the occlusion. The torque may be applied and translated before, during, or after extension of blade 16 beyond the distal end of microcatheter 21 and penetration of the occlusion. According to embodiments, blade 16 may be configured to automatically rotate as it advances longitudinally relative to microcatheter 21 . For example, threading may be provided about the axis along which blade 16 travels, such that travel of blade 16 along the axis also results in rotation of blade 16.
• blade 16 may be configured to be entirely or almost entirely disposed within microcatheter 21 at its distal end when crossing device 1 is in a natural position, as shown in Figs. 1A and 2A, and to be somewhat extended beyond the distal end of microcatheter 21 when crossing device 1 is in an extended position, as shown in Figs. 1 B and 2B.
• blade 16 may be configured to lock relative to microcatheter 21 when in a natural position or an extended position.
• Mechanisms to selectively or automatically lock and unlock blade 16 may be provided and may be operable by a user located at a proximal end of crossing device 1 to activate or deactivate said mechanisms.
• crossing device 1 may be configured as either an "over the wire” device (see Fig. 4) or a "rapid exchange” device (not shown).
• supplemental devices may be configured to interface with crossing device 1 in a rapid exchange configuration.
• Crossing device 1 may include at least one lumen to accommodate a supplemental device to be used in conjunction with other components of crossing device 1 .
• a rapid exchange lumen may entry access at or near a proximal end of crossing device 1 and may extend to the distal end of crossing device 1 (e.g., the distal end of microcatheter 21 ).
• crossing device 1 may be used to address an occlusion.
• the distal end of crossing device 1 including a portion of microcatheter 21 , blade 16, or a guidewire, may be brought to the location of an occlusion.
• the guidewire may first be brought to the occlusion, followed by microcatheter 21 and blade 16.
• Blade 16 may be extended beyond the distal end of microcatheter 21 by operation of handle 12, as disclosed herein.
• As the occlusion is penetrated increased advancement of microcatheter 21 , blade 16, or a guidewire may be provided.
• Increased advancement of microcatheter 21 , blade 16, or a guidewire may provide a improved position of the same to continue the crossing procedure in iterative steps. The process may be repeated in successive steps until the occlusion is crossed as desired.
• a method for causing blade 16 to penetrate an occlusion is disclosed.
• microcatheter 21 may be brought to an occlusion, such as a heavily calcified lesion or other obstruction, as discussed herein.
• Blade 16 may be advanced by crossing device 1 such that it penetrates the occlusion.
• Blade 16 may retract when handle 12 is released, by the function of spring 17.
• the above described steps may be repeated as desired.
• the above described steps may be repeated until the occlusion is entirely breached or until sufficient access is provided for other devices to act upon the occlusion.
• a PTA balloon, stent device, or other catheter-based supplemental treatment device may operate within a channel created by operation of crossing device 1 .
• the method and use of crossing device 1 may provide increased perfusion of fluid flow through the channel created by crossing device 1 .
• the increased perfusion may provide improved conditions to facilitate breakdown of the occlusion, such that perfusion alone or in combination with other methods may remove threats presented by the occlusion.
• variations on embodiments may be made to provide customizable use and performance characteristics of crossing device 1 .
• spring 17 may be omitted such that handle 12 may travel relative to body 13 along the axis within certain limitations, such that the user may selectively and manually advance and retract blade 16 relative to microcatheter 21 .
• crossing device 1 may be configured to allow blade 16 to be extended in a natural position and retracted based on action taken by a user (not shown).
• the configuration shown in Fig. 4 may be modified such that spring 17 is located such that its tendency toward elastic expansion causes handle 12 to be advanced toward body 13.
• retraction of handle 12 may compress spring 17, such that release of handle 12 causes advancement of blade 16 toward or beyond the distal end of microcatheter 21 .
• crossing device 1 may include two springs to provide novel use and performance characteristics (not shown). For example, one spring may tend toward extension of blade 16, and another spring may tend toward retraction of blade 16. Blade 16 may be configured such that the distal tip of blade 16 is in a desired location when equilibrium between the two springs is achieved in a natural position. A user may selectively advance or retract blade 16 by operation of handle 12, and release for blade 16 to allow release of any energy stored in the springs, with the blade 16 eventually reaching equilibrium in a natural position.
• kits of parts are disclosed.
• kits of parts can be envisioned by the person skilled in the art, the kits of parts including at least one component disclose herein and configured to perform at least one of the methods herein disclosed.
• directions for use (“DFU") are included and the device may be part of a surgical tray or other packaged accessory set for surgeries.
• the kit may be a sub-component of a surgical tray.
• each physical element disclosed should be understood to encompass a disclosure of the action which that physical element facilitates.

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• Health & Medical Sciences (AREA)
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• Medical Informatics (AREA)
• Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
• Engineering & Computer Science (AREA)
• Biomedical Technology (AREA)
• Heart & Thoracic Surgery (AREA)
• Vascular Medicine (AREA)
• Molecular Biology (AREA)
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• General Health & Medical Sciences (AREA)
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• 2009
  • 2009-09-03 WO PCT/US2009/055950 patent/WO2011028203A1/en not_active Ceased
  • 2009-09-30 US US12/570,677 patent/US9204893B2/en active Active
• 2010
  • 2010-08-30 WO PCT/US2010/047170 patent/WO2011028665A2/en not_active Ceased
  • 2010-08-30 CN CN201080049452.9A patent/CN102762159B/zh active Active
  • 2010-08-30 CA CA2772024A patent/CA2772024C/en active Active
  • 2010-08-30 EP EP10814335.5A patent/EP2473122B1/en active Active
  • 2010-08-30 JP JP2012527953A patent/JP6050682B2/ja active Active
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• 2012
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• 2015
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