US20210401441A1 - Adhesive cover occluding device for aneurysm treatment - Google Patents

Abstract

The device includes a net portion for occluding an aneurysm neck and an adhesive to secure the net portion. The device can further include a channel orifice opening in the net portion, and an agent channel for delivering a rapid-curing agent through the orifice into the aneurysm. Devices can be delivered through a catheter to the aneurysm, the net can expand to occlude the aneurysm neck, and the net can be adhered to the aneurysm neck. In devices including a channel orifice and agent channel, the rapid-curing agent can be injected into the aneurysm. During injection of the rapid-curing agent, the net portion can create a barrier to inhibit the rapid-curing agent from exiting the aneurysm. After injection of the coagulation agent, portions of the treatment device, excluding the net portion, can be extracted from the patient.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS
• The present application is a continuation application of U.S. patent application Ser. No. 16/269,209 filed Feb. 6, 2019, the entire contents of which are hereby incorporated by reference.
FIELD OF INVENTION
• The present invention generally relates to medical instruments, and more particularly, to treatment devices for aneurysm therapy.
BACKGROUND
• Aneurysms can be complicated and difficult to treat. For example, treatment access can be limited or unavailable when an aneurysm is located proximate critical tissues. Such factors are of particular concern with cranial aneurysms due to the brain tissue surrounding cranial vessels and the corresponding limited treatment access.
• Prior solutions have included endovascular treatment access whereby an internal volume of the aneurysm sac is removed or excluded from arterial blood pressure and flow. In this respect, because the interior walls of the aneurysm can continue being subjected to flow of blood and related pressure, aneurysm rupture remains possible.
• Alternative to endovascular or other surgical approaches can include occlusive devices. Such devices have typically incorporated multiple embolic coils that are delivered to the vasculature using microcatheter delivery systems. For example, when treating cranial aneurysms, a delivery catheter with embolic coils is typically first inserted into non-cranial vasculature through a femoral artery in the hip or groin area. Thereafter, the catheter is guided to a location of interest within the cranium. The sac of the aneurysm can then be filled with the embolic material to create a thrombotic mass that protects the arterial walls from blood flow and related pressure. However, such occlusive devices do have certain shortcomings, including mass effect, which can cause compression on the brain and its nerves. Obtaining an embolic coil packing density sufficient to either occlude the aneurysm neck or fill the aneurysm sac is difficult and time consuming. Further, aneurysm morphology (e.g. wide neck, bifurcation, etc.) can require ancillary devices such a stents or balloons to support the coil mass and obtain the desired packing density. The coils and accompanying ancillary devices can remain in patients for their entire lives, and can apply damaging stressing forces to the aneurysm. Current embolic coil approaches can also involve the delivery of various coils into a coil mass. With each coil inserted, there is an increased risk for an adverse event. Therefore, there is an advantage to creating a system that does not require multiple products or coils to be inserted during one procedure. Additionally, embolic coils do not always effectively treat aneurysms as re-canalization of the aneurysm and/or coil compaction can occur over time.
• One particular type of occlusive approach endeavors to deliver and treat the entrance or “neck” of the aneurysm as opposed to the volume of the aneurysm by implanting a device in the parent vessel of the aneurysm. In such “neck” approaches, by minimizing blood flow across the neck, a cessation of flow into the aneurysm can be achieved. In turn, a thrombotic mass can naturally form without having to deliver embolic materials into the aneurysm sac, as previously described. However, neck-occlusive approaches, such as implanting a flow impeding device in the parent vessel, are not without drawbacks. This type of approach can impede blood flow into peripheral blood vessels while blocking the aneurysm neck in the parent vessel. Impeding flow to the peripheral blood vessel can unintentionally lead to severe damage if the openings of the vessels are blocked.
• Another type of occlusive approach is to use glues, adhesives, or other similar products (e.g., NBCA (N-butyl cyanoacrylate)) to obstruct blood flow to areas of the brain. However, these products, when inserted into cranial vessels alone, can move downstream and cause embolization in areas that are not desirable. It is therefore desirable to have a device which easily, accurately, and safely occludes a neck of an aneurysm or other arterio-venous malformation in a parent vessel and can maintain the placement of any glues or adhesives used without requiring the insertion of multiple products or blocking flow into peripheral vessels communicating with the parent vessel while minimizing applied forces to the aneurysm.
• It is an aim of this invention to resolve these and other issues of the art.
SUMMARY
• Disclosed herein are various exemplary devices for treating an aneurysm with an adhesive cover treatment device. The devices can generally include a net portion for occluding an aneurysm neck and an adhesive to secure the net portion. The devices can further include a channel orifice opening in the net portion, and an agent channel for delivering a rapid-curing agent through the orifice into the aneurysm. Devices can be delivered through a catheter to the aneurysm, the net can expand to occlude the aneurysm neck, the net can be adhered to the aneurysm neck. In devices including a channel orifice and agent channel, the rapid-curing agent can be injected into the aneurysm. During injection of the rapid-curing agent, the net portion can create a barrier to inhibit the rapid-curing agent from exiting the aneurysm. After injection of the coagulation agent, portions of the treatment device, excluding the net portion, can be extracted from the patient.
• An example treatment device for occluding an aneurysm can include a net portion that is expandable from a collapsed configuration to an occluding configuration and an adhesive for securing the net portion. The net portion in the occluding configuration can occlude an aneurysm neck to create a barrier between the aneurysm and a blood vessel. The adhesive can secure the net portion in its position in the occluding configuration near the aneurysm neck to prevent the net portion from dislodging and disrupting the barrier between the aneurysm and the blood vessel. When the barrier formed by the net portion is adhered in place, the aneurysm can self-embolize. The example device can be delivered to the aneurysm using a microcatheter.
• The adhesive can be activated prior to or subsequent to the net portion reaching the occluding configuration, such as prior to delivery of the net portion to the aneurysm, upon delivery of the net portion to the aneurysm, when the net portion reaches the occluding configuration, or after the net portion reaches the occluding configuration.
• An example device for occluding an aneurysm can further include a hypotube spanning at least a portion of the perimeter of the net portion that contains the adhesive in an uncured state. The hypotube can contain at least one hypotube orifice that exposes at least some of the adhesive in the uncured state to an environment outside the net portion. A curing channel can deliver a curing agent to the net portion to activate the adhesive from the uncured state. The adhesive can then adhere the net portion in the occluding configuration in its position occluding the aneurysm neck.
• An example device can further include a delivery channel for delivering the adhesive to the net portion. The delivery channel can have a distal end connected to the net portion. The adhesive can be delivered to the net portion prior to or subsequent to the net portion reaching the occluding configuration, such as prior to delivery of the net portion to the aneurysm, upon delivery of the net portion to the aneurysm, when the net portion reaches the occluding configuration, or after the net portion reaches the occluding configuration.
• An example device for occluding an aneurysm can further include a channel orifice and an agent channel. The channel orifice can define an opening in the net portion through which the rapid-curing agent can be injected. The channel orifice can open towards the aneurysm when the net portion is in the occluding configuration. The agent channel can be in communication with the channel orifice and can deliver the rapid-curing agent through the channel orifice into the aneurysm sac.
• The agent channel can have a proximal end and a distal end. The distal end of the agent channel can communicate with the channel orifice to transfer the rapid-curing agent into the aneurysm sac. The proximal end of the agent channel can receive the rapid-curing agent. The channel orifice can also be an opening in the distal end of the agent channel, whereby a single opening functions as both the channel orifice and the distal end of the agent channel.
• The example device can further include a trigger mechanism in communication with the proximal end of the agent channel. The trigger mechanism can communicate with the proximal end of the agent channel to receive the rapid-curing agent or introduce the rapid-curing agent into the agent channel. The trigger mechanism can facilitate delivery of the rapid-curing agent from the proximal end to the distal end of the agent channel, and then through the channel orifice into the aneurysm sac.
• An example method for treating an aneurysm can include providing an exemplary treatment device which can include a net portion and an adhesive; delivering the exemplary treatment device to an aneurysm treatment site; expanding the net portion to an occluding configuration at an aneurysm neck to occlude at least a portion of the aneurysm neck to create a barrier between a blood vessel and the aneurysm; and adhering the net portion approximate to the aneurysm neck.
• The method can further include inserting the adhesive in an uncured state into a hypotube spanning at least a portion of the perimeter of the net portion, where the hypotube contains at least one hypotube orifice exposing at least some of adhesive the environment outside the net portion; and delivering a curing agent to the net portion via a curing channel to activate the adhesive.
• Another example method for treating an aneurysm can include providing an exemplary treatment device which can include a net portion, an adhesive, a channel orifice defining an opening in the net portion, and an agent channel; joining the agent channel to the channel orifice; delivering the exemplary treatment device to an aneurysm treatment site; expanding the net portion to an occluding configuration at an aneurysm neck to occlude at least a portion of the aneurysm neck to create a barrier between a blood vessel and the aneurysm to prevent a rapid-curing agent from entering the blood vessel; adhering the net portion approximate to the aneurysm neck; and delivering the rapid-curing agent through the agent channel, through the channel orifice, and into the aneurysm sac to coagulate the blood present in the aneurysm.
• The method can further include providing a trigger mechanism; triggering the delivery of the agent by activating the trigger mechanism at a proximal end of the agent channel; and delivering the agent from the proximal end of the agent channel to a distal end of the agent channel.
BRIEF DESCRIPTION OF THE DRAWINGS
• The above and further aspects of this invention are further discussed with reference to the
• following description in conjunction with the accompanying drawings, in which like numerals indicate like structural elements and features in various figures. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating principles of the invention. The figures depict one or more implementations of the inventive devices, by way of example only, not by way of limitation.
• FIGS. 1ato 1care illustrations of a treatment sequence of an exemplary treatment device to occlude an aneurysm according to aspects of the present invention;
• FIGS. 2ato 2bare illustrations of a treatment sequence of an exemplary treatment device to occlude an aneurysm according to aspects of the present invention;
• FIGS. 3ato 3dare illustrations of a treatment sequence of an exemplary treatment device to occlude an aneurysm and deliver a rapid-curing agent to an aneurysm according to aspects of the present invention;
• FIGS. 4ato 4dare illustrations of a treatment sequence of an exemplary treatment device to occlude an aneurysm, and deliver an adhesive to a net portion and a rapid-curing agent to an aneurysm according to aspects of the present invention;
• FIGS. 5ato 5gare illustrations of a treatment sequence of an exemplary treatment device to occlude an aneurysm, and deliver a curing agent to a net portion and a rapid-curing agent to an aneurysm according to aspects of the present invention;
• FIGS. 6ato 6dare illustrations of a treatment sequence of an exemplary treatment device in connection with a trigger mechanism to occlude an aneurysm and deliver a rapid-curing agent to an aneurysm according to aspects of the present invention;
• FIG. 7 is a flow diagram outlining example method steps that can be carried out during delivery and use of a treatment device according to aspects of the present invention; and
• FIG. 8 is a flow diagram outlining example method steps that can be carried out during delivery and use of a treatment device according to aspects of the present invention.
DETAILED DESCRIPTION
• The descriptions contained herein are examples of the invention and are not intended in any way to limit the scope of the invention. In general, example devices described herein describe a treatment device that can be placed and adhered over the neck of an aneurysm to create a barrier between the vessel and the aneurysm. At least one rapid-curing agent can then be delivered into the aneurysm sac. The rapid-curing agent can coagulate the blood in the aneurysm instantly.
• The example devices can include a net portion that can expand from a collapsed configuration to an occluding configuration in which the net portion in the occluding configuration is shaped to occlude an aneurysm neck. The net portion can be adhered in position to occlude the aneurysm neck. In the occluding configuration, the net portion can generally have a channel orifice working in connection with an agent channel that delivers a rapid-curing agent through the channel orifice and into the aneurysm sac.
• It must be noted that, as used in the specification and the appended claims, the singular forms “a,” “an” and “the” include plural referents unless the context clearly dictates otherwise. By “comprising” or “containing” or “including” it is meant that at least the named compound, element, particle, or method step is present in the composition or article or method, but does not exclude the presence of other compounds, materials, particles, method steps, even if the other such compounds, material, particles, method steps have the same function as what is named.
• In describing examples, terminology will be resorted to for the sake of clarity. It is intended that each term contemplates its broadest meaning as understood by those skilled in the art and includes all technical equivalents that operate in a similar manner to accomplish a similar purpose. It is also to be understood that the mention of one or more steps of a method does not preclude the presence of additional method steps or intervening method steps between those steps expressly identified. Steps of a method can be performed in a different order than those described herein without departing from the scope of the disclosed technology. Similarly, it is also to be understood that the mention of one or more components in a device or system does not preclude the presence of additional components or intervening components between those components expressly identified.
• FIGS. 1athrough 1care illustrations of stages or steps that can occur during a treatment sequence of anexemplary treatment device100 delivered to ananeurysm10.FIG. 1ais an illustration of anexample treatment device100 wherein anet portion102 is shown in a collapsed delivery configuration inside adelivery catheter400. Thenet portion102 can have anadhesive agent108 located on at least a portion of the outer perimeter of thenet portion102, and anadhesive barrier110 covering theadhesive agent108. Thenet portion102 can be sized to fit within the lumen of adelivery catheter400 when thenet portion102 is in the collapsed configuration. When thenet portion102 is in the collapsed configuration, thenet portion102 can have sufficient flexibility to be delivered through thedelivery catheter400, navigating torturous anatomical geometries, to be delivered to ananeurysm10. Thenet portion102 in the collapsed configuration can have a substantially tubular shape.
• Moving on toFIG. 1b, thetreatment device100 can be delivered to ananeurysm10 by sliding thedevice100 distally when thenet portion102 is in a collapsed configuration through adelivery catheter400. Thetreatment device100 can be delivered to a treatment site through ablood vessel106.FIG. 1billustrates thetreatment device100 inside thedelivery catheter400 located near ananeurysm neck12.FIG. 1bfurther shows thenet portion102 pushed partially out of thedelivery catheter400 for deployment inside theaneurysm sac16. Thenet portion102 can expand as it exits thedelivery catheter400. Thenet portion102 can include a memory shape material such as Nitinol, a Nitinol alloy, a polymer memory shape material, or other memory shape material having properties for reshaping as described herein. Thenet portion102 can be in a deformed shape in the collapsed configuration and reshape based on a predetermined shape after exiting thedelivery catheter400. As shown here, upon thenet portion102 exiting thedelivery catheter400, theadhesive barrier110 can be removed to expose theadhesive agent108 located on at least a portion of the perimeter of the net portion. Alternatively, theadhesive barrier110 can be removed at other times prior to or subsequent to thenet portion102 reaching the occluding configuration, such as prior to delivery of thenet portion102 to theaneurysm10, upon delivery of thenet portion102 to theaneurysm10, when thenet portion102 reaches the occluding configuration, or after thenet portion102 reaches the occluding configuration. Theadhesive agent108 can include medical grade silicone-based adhesives as well as light-curable adhesives. Theadhesive agent108 can include adhesives such as N-butyl cyanoacrylate (NBCA), Poly(methyl methacrylate) (PMMA996), N-Methyl-2-Pyrrolidone (NMP), Carbonic anhydrase-related protein 10 (CA10), EA/MMA, and DME.
• FIG. 1cillustrates theexample treatment device100 wherein thenet portion102 is in an occluding configuration in theaneurysm10. Thenet portion102 in the occluding configuration can be sized to occlude at least a portion of ananeurysm neck12. Thenet portion102 in the occluding configuration can completely occlude theaneurysm neck12 as depicted inFIG. 1c. Thenet portion102 in the occluding configuration can occlude theneck12 to create a barrier between ablood vessel106 and theaneurysm10. Thenet portion102 can occlude theaneurysm10 from inside theaneurysm sac16. As illustrated inFIG. 1c, the exposedadhesive agent108 can be in contact with theaneurysm wall14 when thenet portion102 is in the occluding configuration. In occluding configuration, thenet portion102 can be capable of deflecting a blood flow from theaneurysm10, diverting a blood flow from theaneurysm10, slowing a blood flow into theaneurysm10, or any combination thereof.
• In the occluding configuration, thenet portion102 can extend to theaneurysm wall14, and theadhesive agent108 can hold thenet portion102 in its position relative to theaneurysm wall14 andaneurysm neck12 such that thetreatment device100 doesn't become dislodged and therefore ineffective at inhibiting blood flow into theaneurysm10. Thenet portion102 can also provide a force against theaneurysm wall14 to help maintain the occluding configuration of thenet portion102 and assist theadhesive agent108 in adhering to theaneurysm wall14. For example, thenet portion102 can be made of a memory shape material having a first, predetermined shape and a second, collapsed shape in the collapsed configuration. When thenet portion102 is in an occluding configuration within theaneurysm10, thenet portion102 can move to a third, deployed shape that is based at least in part on the first, predetermined shape and the anatomical geometry of theaneurysm10. In the example, the first, predetermined shape can be sized larger than thewall14 within theaneurysm sac16; thenet portion102 can move to extend to thewall14; and thenet portion102 can provide a force against thewall14 as the properties of the memory shape material cause thenet portion102 to attempt to open to the predetermined shape. This force can help theadhesive agent108 adhere to the wall to maintain the position of thenet portion102. Thenet portion102 in the occluding configuration can take the shape of theaneurysm neck12 and/orinterior walls14 of the aneurysm near theaneurysm neck12.
• FIG. 2aillustrates the deployment of thenet portion102 in the same manner described inFIG. 1b.FIG. 2a, however, shows thenet portion102 pushed partially out of thedelivery catheter400 for deployment outside theaneurysm sac16 across theaneurysm neck12.FIG. 2billustrates theexample treatment device100 wherein thenet portion102 is in an occluding configuration outside of theaneurysm10. In this example, theadhesive agent108 can adhere thenet portion102 to the walls of theblood vessel106 and over theaneurysm neck12 to deflect a blood flow from theaneurysm10, divert a blood flow from theaneurysm10, slow a blood flow into theaneurysm10, or any combination thereof. Theadhesive agent108 can hold thenet portion102 in its position over theaneurysm neck12 such that thetreatment device100 doesn't become dislodged and therefore ineffective at inhibiting blood flow into theaneurysm10 and becoming a potential blockage elsewhere in the vascular.
• FIGS. 3athrough 3care illustrations of stages or steps that can occur during a treatment sequence of anexemplary treatment device100 to occlude an aneurysm and deliver a rapid-curingagent114 to ananeurysm10.FIG. 3ais an illustration of anexample treatment device100 wherein thenet portion102 with anadhesive agent108 covered by anadhesive barrier110 is shown in a collapsed delivery configuration inside adelivery catheter400, similar toFIG. 1a. Thenet portion102 can contain achannel orifice104 positioned on a proximal end of the collapsednet portion102. Thechannel orifice104 can work in connection with anagent channel112. Thechannel orifice104 can be connected to the distal end112aof theagent channel112. Thetreatment device100 can be sized to fit within the lumen of adelivery catheter400 when thenet portion102 is in the collapsed configuration. Theagent channel112 can have sufficient length to be accessible outside of the patient when thenet portion102 reaches a treatment site. Thenet portion102 is shown in a collapsed delivery configuration inside adelivery catheter400.
• FIG. 3billustrates thetreatment device100 inside thedelivery catheter400 with thenet portion102 exiting thedelivery catheter400 for deployment outside asac16 of ananeurysm10, similar to the manner described inFIG. 1b. Alternatively, thenet portion102 can deploy inside thesac16 of theaneurysm10. As thedevice100 exits thedelivery catheter400, theadhesive agent108 is exposed in the manner described inFIG. 1b.
• FIG. 3cillustrates thetreatment device100 wherein thenet portion102 is in the occluding configuration outside theaneurysm sac16 similar toFIG. 2b. As illustrated, thechannel orifice104 can be located in thenet portion102 such that thechannel orifice104 opens up to theaneurysm10. Thechannel orifice104 can be centrally located in thenet portion102. Thechannel orifice104 in thenet portion102 can work in connection with anagent channel112. Theagent channel112 can allow for the transfer of one or more rapid-curingagents114 through thechannel112 to thechannel orifice104. The rapid-curingagent114 can include agents such as collagen, chitosan, kaolin, zeolite, organic or biocompatible solvents, or other agents having properties for rapid-curing as described herein. Theagent channel112 can have a distal end112aand aproximal end112b(seeFIG. 6). The distal end112aof theagent channel112 can connect to thechannel orifice104. Theproximal end112bcan receive the rapid-curingagent114 into theagent channel112 and deliver the rapid-curingagent114 from the proximal end to the distal end112aconnected to thechannel orifice104. Theproximal end112bcan be accessible outside of the patient for injection of the rapid-curingagent114 into the patient. Rapid-curingagent114 passing through the lumen of theagent channel112 to the distal end112acan subsequently pass through thechannel orifice104 and into theaneurysm sac16 upon reaching the distal end112aof theagent channel112. The distal end112aof theagent channel112 can also be thechannel orifice104 of thenet portion102. The rapid-curingagent114 can coagulate the blood inside theaneurysm10. The rapid-curingagent114 can coagulate the blood inside theaneurysm10 virtually instantaneously upon contacting the blood inside theaneurysm10 according to the coagulation properties of the rapid-curingagent114.
• As shown inFIG. 3d, once the rapid-curingagent114 has been pumped into theaneurysm sac16, the components of the treatment device100 (not shown) aside from thenet portion102 can be removed from theaneurysm10. The components of thetreatment device100 aside from thenet portion102 can be removed once the rapid-curingagent114 has coagulated the blood in theaneurysm10. The components of thetreatment device100 aside from thenet portion102 can be sized to traverse through a lumen of a retrieval catheter (not shown).
• FIGS. 4ato 4dare illustrations of stages or steps that can occur during a treatment sequence of anexemplary treatment device100 to occlude ananeurysm10, deliver an adhesive108 to thenet portion102, and deliver a rapid-curingagent114 to ananeurysm10.FIG. 4ais an illustration of anexample treatment device100 wherein thenet portion102 is shown in a collapsed delivery configuration inside adelivery catheter400. Thedevice100 can have achannel orifice104 andagent channel112 as described inFIG. 3a. Thedevice100 can also have adelivery channel118 that can work in communication with thenet portion102. Thedelivery channel118 can have a distal end118ain communication with thenet portion102. Thedelivery channel108 can deliver adhesive108 thenet portion102 to adhere thenet portion102 approximate theneck12. Thetreatment device100 can be sized to fit within the lumen of adelivery catheter400 when thenet portion102 is in the collapsed configuration.
• FIG. 4billustrates the deployment of thenet portion102 inside thesac16 of ananeurysm10. As illustrated inFIG. 4b, thetreatment device100 can be delivered to ananeurysm10 by sliding thedevice100 distally when thenet portion102 is in a collapsed configuration through adelivery catheter400. Thetreatment device100 can be delivered to a treatment site through ablood vessel106.FIG. 4billustrates thetreatment device100 inside thedelivery catheter400 located near ananeurysm neck12.FIG. 4bfurther shows thenet portion102 pushed partially out of thedelivery catheter400 for deployment inside theaneurysm sac16. Thenet portion102 can expand as it exits thedelivery catheter400. Alternatively, thenet portion102 can deploy outside thesac16 of theaneurysm10.
• FIG. 4cillustrates thetreatment device100 wherein thenet portion102 is in the occluding configuration inside theaneurysm sac16. As shown inFIG. 4c, after thenet portion102 reaches the occluding configuration, theadhesive agent108 can be delivered to thenet portion102 through thedelivery channel118 to adhere thenet portion102 over theaneurysm neck12 inside theaneurysm sac16. Alternatively,delivery channel118 can deliver adhesive108 to thenet portion102 to adhere thenet portion102 in the occluding configuration over theaneurysm neck12 outside theaneurysm sac16. The adhesive108 can also be delivered prior to or subsequent to thenet portion102 reaching the occluding configuration, such as prior to delivery of thenet portion102 to theaneurysm10, upon delivery of thenet portion102 to theaneurysm10, or when thenet portion102 reaches the occluding configuration. After thenet portion102 is adhered over theneck12, the rapid-curingagent114 can be delivered to theaneurysm sac16 in the manner described inFIG. 3c.
• As inFIG. 3d,FIG. 4dillustrates theaneurysm10 once the rapid-curingagent114 has been pumped into theaneurysm sac16, after which the components of the treatment device100 (not shown) aside from thenet portion102 can be removed from theaneurysm10.
• FIGS. 5ato 5fare illustrations of stages or steps that can occur during a treatment sequence of anexemplary treatment device100 to occlude ananeurysm10, deliver a curing agent124 to thenet portion102, and deliver a rapid-curingagent114 to ananeurysm10.FIG. 5ais an illustration of anexample treatment device100 wherein thenet portion102 is shown in a collapsed delivery configuration inside adelivery catheter400. Thedevice100 can have achannel orifice104 andagent channel112 as described inFIG. 3a. Thedevice100 can also have ahypotube120 spanning at least a portion of the perimeter of thenet portion102. Thehypotube120 can span the entire perimeter of thenet portion102. Thehypotube120 can contain an adhesive108 in an uncured state. Thehypotube120 can contain one or more hypotube orifices122 (seeFIG. 5d) that expose theuncured adhesive108 to the environment outside thehypotube120.
• Thedevice100 can further have a curingchannel126 that can work in communication with thenet portion102. The curingchannel126 can have a distal end126ain connection withnet portion102. The curingchannel126 can deliver a curing agent (as discussed above) to thenet portion102 of thedevice100. The curingagent126 can activate theuncured adhesive108 in thenet portion102. Thetreatment device100 in its entirety can be sized to fit within the lumen of adelivery catheter400 when thenet portion102 is in the collapsed configuration.
• FIG. 5billustrates the deployment of thenet portion102 inside thesac16 of ananeurysm10 similar toFIG. 4b.FIG. 5cillustrates thetreatment device100 wherein thenet portion102 is in the occluding configuration inside theaneurysm sac16 in the manner shown inFIG. 4c. As shown here, after thenet portion102 reaches the occluding configuration, the curing agent124 can be delivered to thenet portion102 through the curingchannel126 to activate theadhesive agent108 and adhere thenet portion102 over theaneurysm neck12 inside theaneurysm sac16. Alternatively, the curing agent124 can be delivered to thenet portion102 through the curingchannel126 to activate theadhesive agent108 and adhere thenet portion102 over theaneurysm neck12 outside theaneurysm sac16. The curing agent124 can be delivered prior to or subsequent to thenet portion102 reaching the occluding configuration, such as prior to delivery of thenet portion102 to theaneurysm10, upon delivery of thenet portion102 to theaneurysm10, or when thenet portion102 reaches the occluding configuration.
• FIG. 5dshows a blown-up and cross-sectional view of thehypotube120. Thehypotube120 can contain at least onehypotube orifice122 as well as the adhesive108 in an uncured state. The hypotube orifices122 can expose theuncured adhesive108 to the environment outside thehypotube120.FIG. 5eis a cross section ofnet portion102 loaded with adhesive108. For example, inFIGS. 5dand 5e, theuncured adhesive108 can be delivered by first being mechanically held within thenet portion102. Thenet portion102 can contain a lumen along the circumference (a hypotube122) with orifices that allow the uncured adhesive to be exposed. The viscosity of the adhesive108 can be characterized such that it could be injected into a lumen of thenet portion102 but viscous enough that it will not relocate or disperse during delivery. Upon placing thenet portion102 and later delivering a curing agent, the adhesive within the net will be activated. The net would have orifices that expose some of the adhesive to the aneurysm, allowing it to adhere the edges of the net to the aneurysm wall. In this case, the net would act as the device blocking flow into the aneurysm
• FIG. 5fillustrates thetreatment device100 wherein thenet portion102 is in the occluding configuration inside theaneurysm sac16 in the manner shown inFIG. 4c. When the curing agent124 is delivered to thenet portion102, the adhesive108 can cure and adhere thenet portion102 in the occluding configuration over theaneurysm neck12 to occlude theaneurysm10. Once thenet portion102 has been adhered in position, therapid curing agent114 can be delivered to theaneurysm10 as illustrated inFIG. 3c
• Similar toFIG. 3d,FIG. 5gillustrates theaneurysm10 once the rapid-curingagent114 has been pumped into theaneurysm sac16, after which the components of thetreatment device100 aside from thenet portion102 are removed from theaneurysm10.
• FIGS. 6ato 6eare illustrations of stages or steps that can occur during another example implementation sequence of anexemplary treatment device100 to occlude ananeurysm10 and deliver a rapid-curingagent114 to ananeurysm10.
• FIG. 6ais an illustration of anexample treatment device100 including anet portion102, achannel orifice104, anagent channel112, and atrigger mechanism116. Thenet portion102 is shown in a collapsed delivery configuration inside adelivery catheter400. Thenet portion102 can contain thechannel orifice104 that can be in communication with anagent channel112. Theagent channel112 can have aproximal end112bin communication with thetrigger mechanism116. Theproximal end112bof theagent channel112 can receive the rapid-curingagent114 into theagent channel112 for delivery. Thetrigger mechanism116 can facilitate the delivery of the rapid-curingagent114 to ananeurysm sac16. The components of thetreatment device100 excluding thetrigger mechanism116 can be sized to fit within the lumen of adelivery catheter400 when thenet portion102 is in the collapsed configuration.
• FIG. 6billustrates thetreatment device100 inside thedelivery catheter400 with thenet portion102 exiting thedelivery catheter400 for deployment outside theaneurysm sac16 in a manner similar toFIG. 4b. As illustrated inFIGS. 6bto 6d, the treatment site can include ananeurysm10 positioned adjacent bifurcated blood vessel branches and thetreatment device100 can be delivered to theaneurysm10 through astem branch106 feeding the bifurcated blood vessel branches.
• FIG. 6cillustrates thetreatment device100 wherein thenet portion102 is in an occluding configuration in theaneurysm10. Upon thenet portion102 reaching the occluding configuration, thetrigger mechanism116 can facilitate the delivery of the rapid-curingagent114 through theagent channel112 to theaneurysm sac16.
• As inFIG. 3d,FIG. 6dillustrates theaneurysm10 once the rapid-curingagent114 has been pumped into theaneurysm sac16, after which the components of thetreatment device100 aside from thenet portion102 can be removed from theaneurysm10.
• FIG. 7 is a flow diagram outlining example method steps that can be carried out during the administration of atreatment device100. The method steps can be implemented by any of the example means described herein or by any means that would be known to one of ordinary skill in the art.
• Referring to amethod700 outlined inFIG. 7, in step710 a treatment device comprising a net portion and an adhesive can be provided for administration to a patient. Instep720, the treatment device can be delivered to the aneurysm treatment site. In step730, the net portion can be expanded to an occluding configuration approximate a center of an aneurysm neck, wherein the expanded net portion occludes at least a portion of the aneurysm neck to create a barrier between a blood vessel and the aneurysm. Instep740, the net portion can be adhered approximate to the aneurysm neck.
• Method700 can further comprise the steps of inserting the adhesive in an uncured state into a hypotube spanning at least a portion of the perimeter of the net portion, wherein the hypotube comprises at least one hypotube orifice exposing a portion of the adhesive in the uncured state to the environment outside the net portion, and delivering a curing agent to the net portion via a curing channel to activate the adhesive.
• FIG. 8 is a flow diagram outlining example method steps that can be carried out during the administration of atreatment device100. The method steps can be implemented by any of the example means described herein or by any means that would be known to one of ordinary skill in the art.
• Referring to amethod800 outlined inFIG. 8, instep810 the treatment device comprising a net portion, an adhesive, a channel orifice defining an opening in the net portion, and an agent channel can be provided for administration to a patient. Instep820, the agent channel can be joined to communicate with the channel orifice. Instep830, the treatment device can be delivered to an aneurysm treatment site. Instep840, the net portion can be expanded to the occluding configuration approximate a center of an aneurysm neck. When the net portion is expanded to the occluding configuration instep840, the net portion can occlude at least a portion of an aneurysm neck. Step840 can also create a barrier between ablood vessel106 and the aneurysm to prevent the rapid-curing agent from entering the blood vessel. In step850, net portion can be adhered approximate to the aneurysm neck. In step860, the rapid-curing agent can be delivered through the agent channel and the channel orifice into the aneurysm sac to coagulate the blood present in the aneurysm.
• Method800 can further comprise the steps of providing a trigger mechanism and triggering the delivery of the agent by activating the trigger mechanism at a proximal end of the agent channel to deliver the agent from the proximal end of the agent channel to a distal end of the agent channel.
• It should be apparent to those skilled in the art that the present teachings cover devices with any possible combination of a net portion, adhesive, channel orifice, agent channel, hypotube, delivery channel, curing channel, and/or trigger mechanism. The descriptions contained herein are examples of the invention and are not intended in any way to limit the scope of the invention. As described herein, the invention contemplates many variations and modifications of the device for occluding an aneurysm, including alternative geometries of elements and components described herein, utilizing any number of known means for braiding, knitting, weaving, or otherwise forming the net portion as is known in the art, utilizing any of numerous materials for each component or element (e.g. radiopaque materials, memory shape materials, etc.), utilizing additional components including components to deliver a treatment device to an aneurysm or eject an treatment device from a delivery catheter, or utilizing additional components to perform functions not described herein, for example. These modifications would be apparent to those having ordinary skill in the art to which this invention relates and are intended to be within the scope of the claims which follow.

Claims (20)

1. A treatment device for treating an aneurysm comprising:

a net portion expandable from a collapsed configuration to an occluding configuration, the occluding configuration sized to extend across and occlude at least a portion of a neck of the aneurysm to create a barrier between a blood vessel and the aneurysm; and

an adhesive circumscribing at least a portion of a perimeter of the net portion when the net portion is in the occluding configuration, the adhesive being positioned to contact with tissue approximate the aneurysm neck thereby securing the net portion in a position approximate the aneurysm neck; and

an adhesive barrier configured to be removed to expose the adhesive agent.

2. The treatment device ofclaim 1, wherein the net portion in the collapsed configuration is sized to traverse through a lumen of a delivery catheter.

3. The treatment device ofclaim 1, wherein the adhesive barrier is removed to expose the adhesive agent located on at least a portion of the perimeter of the net portion subsequent to the net portion reaching the occluding configuration.

4. The treatment device ofclaim 1, wherein the adhesive barrier is removed to expose the adhesive agent located on at least a portion of the perimeter of the net portion prior to the net portion reaching the occluding configuration.

5. The treatment device ofclaim 1, wherein the adhesive barrier is removed to expose the adhesive agent located on at least a portion of the perimeter of the net portion upon delivery of the net portion to the aneurysm.

6. The treatment device ofclaim 2, wherein the adhesive barrier is removed to expose the adhesive agent located on at least a portion of the perimeter of the net portion upon exiting the delivery catheter.

7. The treatment device ofclaim 1 further comprising:

a channel orifice defining an opening in the net portion, wherein in the occluding configuration the channel orifice is open to the aneurysm; and

an agent channel in communication with the channel orifice delivering a rapid-curing agent to an aneurysm sac through the channel orifice.

8. The treatment device ofclaim 7 further comprising:

a trigger mechanism for introducing the rapid-curing agent into the agent channel;

wherein the agent channel comprises a proximal end in communication with the trigger mechanism to receive the rapid-curing agent into the agent channel and a distal end in communication with the channel orifice; and

wherein the agent channel delivers the rapid-curing agent from the proximal end to the distal end and through the channel orifice into the sac of the aneurysm.

9. A method for treating an aneurysm comprising:

providing a treatment device comprising a net portion, an adhesive circumscribing at least a portion of a perimeter of the net portion, and a removable adhesive barrier covering at least a portion of the adhesive;

delivering the treatment device to an aneurysm treatment site;

expanding the net portion to an occluding configuration approximate a center of an aneurysm neck, wherein the expanded net portion occludes at least a portion of the aneurysm neck to create a barrier between a blood vessel and the aneurysm;

removing the adhesive barrier to expose a portion of the adhesive to tissue approximate the aneurysm neck prior to, during, or after the expansion step; and

adhering the net portion approximate to the aneurysm neck by the adhesive.

10. The method ofclaim 9, wherein the net portion in the collapsed configuration is sized to traverse through a lumen of a delivery catheter.

11. The method ofclaim 9, wherein the adhesive barrier is removed to expose the adhesive agent located on at least a portion of the perimeter of the net portion subsequent to the net portion reaching the occluding configuration.

12. The method ofclaim 9, wherein the adhesive barrier is removed to expose the adhesive agent located on at least a portion of the perimeter of the net portion prior to the net portion reaching the occluding configuration.

13. The method ofclaim 9, wherein the adhesive barrier is removed to expose the adhesive agent located on at least a portion of the perimeter of the net portion upon delivery of the net portion to the aneurysm.

14. The method ofclaim 10, wherein the adhesive barrier is removed to expose the adhesive agent located on at least a portion of the perimeter of the net portion upon exiting the delivery catheter.

15. The method ofclaim 10 further comprising:

introducing a rapid-curing agent through an agent channel to the aneurysm sac, the agent channel in communication with a channel orifice defining an opening in the net portion,

wherein in the occluding configuration the channel orifice is open to the aneurysm.

16. The method ofclaim 15, wherein the treatment device further comprises:

a trigger mechanism for introducing the rapid-curing agent into the agent channel;

wherein the agent channel comprises a proximal end in communication with the trigger mechanism to receive the rapid-curing agent into the agent channel and a distal end in communication with the channel orifice; and

wherein the agent channel delivers the rapid-curing agent from the proximal end to the distal end and through the channel orifice into the sac of the aneurysm.

17. A method for treating an aneurysm comprising:

providing a treatment device comprising a net portion, an adhesive circumscribing at least a portion of a perimeter of the net portion when the net portion is in an occluding configuration, a removable adhesive barrier covering at least a portion of the adhesive, a channel orifice defining an opening in the net portion, and an agent channel;

joining the agent channel with the channel orifice;

delivering the treatment device to an aneurysm treatment site via a delivery catheter;

expanding the net portion to the occluding configuration approximate a center of an aneurysm neck, wherein the expanded net portion occludes at least a portion of the aneurysm neck to create a barrier between a blood vessel and the aneurysm to prevent a rapid-curing agent from entering the blood vessel;

adhering the net portion approximate to the aneurysm neck by removing the adhesive barrier such that the adhesive contacts tissue approximate the aneurysm neck prior to, during, or after the expansion step; and

delivering the rapid-curing agent through the agent channel and the channel orifice into the aneurysm sac to coagulate the blood present in the aneurysm.

18. The method ofclaim 17, wherein the adhesive barrier is removed to expose the adhesive agent located on at least a portion of the perimeter of the net portion subsequent to the net portion reaching the occluding configuration.

19. The method ofclaim 17, wherein the adhesive barrier is removed to expose the adhesive agent located on at least a portion of the perimeter of the net portion prior to the net portion reaching the occluding configuration.

20. The method ofclaim 17, wherein the adhesive barrier is removed to expose the adhesive agent located on at least a portion of the perimeter of the net portion upon exiting the delivery catheter.

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