Aneurysm occluding device for use with coagulating agents

Abstract

Devices can generally include a fan portion for occluding an aneurysm neck, a channel orifice opening in the fan portion, and an agent channel for delivering a coagulating agent through the orifice into the aneurysm. Devices can be delivered through a catheter to the aneurysm, the fan portion can expand to occlude the aneurysm neck, and coagulating agent can be injected into the aneurysm. During injection of the coagulating agent, the fan portion can inhibit the coagulating agent from exiting the aneurysm. After injection of the coagulation agent, the fan portion can collapse and the device can be extracted from the patient.

1 . A treatment device for treating an aneurysm, the treatment device comprising:
 a fan portion which is inflatable 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, the fan portion comprising a concave surface facing into a sac of the aneurysm, an outer surface of the fan portion configured to be in contact with an interior wall of the aneurysm proximate to the neck of the aneurysm when the fan portion is in the occluding configuration;   a channel orifice defining an opening in the fan portion, wherein in the occluding configuration the channel orifice is open to the aneurysm; and   an agent channel joined to the channel orifice in the collapsed configuration, the agent channel configured to deliver a coagulating agent to the aneurysm sac through the channel orifice.   
     
     
         2 . The treatment device of  claim 1  further comprising an inflation tube for inflating the fan portion, the inflation tube comprising a distal end connected to the fan portion. 
     
     
         3 . The treatment device of  claim 1  further comprising:
 a trigger mechanism for introducing the coagulating agent into the agent channel; 
 wherein the agent channel comprises a proximal end in communication with the trigger mechanism to receive the coagulating agent into the agent channel and a distal end in communication with the channel orifice; and 
 wherein the agent channel delivers the coagulating agent from the proximal end to the distal end and through the channel orifice into the sac of the aneurysm. 
 
     
     
         4 . The treatment device of  claim 1 , wherein the channel orifice is an opening in the distal end of the agent channel. 
     
     
         5 . The treatment device of  claim 1 , wherein the fan portion is further collapsible from the occluding configuration to an extraction configuration following delivery of the coagulating agent to the aneurysm sac, the extraction configuration sized to traverse through a lumen of a retrieval catheter. 
     
     
         6 . The treatment device of  claim 1  further comprising a trigger mechanism in communication with a proximal end of the agent channel for introducing the coagulating agent into the agent channel. 
     
     
         7 . A method for treating an aneurysm, the method comprising:
 providing a treatment device comprising a fan portion inflatable from a collapsed configuration to an occluding configuration, a channel orifice defining an opening in the fan portion, and an agent channel;   joining an inflation tube comprising a distal end to the fan portion for inflating the fan portion;   joining the agent channel to communicate with the channel orifice when the fan portion is in the collapsed configuration;   delivering the treatment device to an aneurysm treatment site;   inflating the fan portion to an occluding configuration approximate a center of an aneurysm neck by the inflation tube, wherein the inflated fan portion configuration is sized to extend across and occlude at least a portion of a neck of the aneurysm, the fan portion comprising a concave surface facing into a sac of the aneurysm, and an outer surface of the fan portion configured to be in contact with an interior wall of the aneurysm proximate to the neck of the aneurysm when the fan portion is in the occluding configuration;   
       injecting a coagulating agent through the agent channel and the channel orifice into the aneurysm sac to coagulate blood present in the aneurysm; and
 collapsing the treatment device from the occluding configuration to an extraction configuration for extraction of the device after the injection of the coagulating agent. 
 
     
     
         8 . The method of  claim 7 , wherein the step of inflating the fan portion to an occluding configuration approximate a center of an aneurysm neck further comprises the step of creating a barrier between a blood vessel and the aneurysm to prevent the coagulating agent from entering the blood vessel. 
     
     
         9 . The method of  claim 7  further comprising the step of removing the treatment device through a retrieval catheter. 
     
     
         10 . The method of  claim 7  further comprising the step of removing the treatment device through a retrieval deployment system. 
     
     
         11 . The method of  claim 7  further comprising 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. 
 
     
     
         12 . The method of  claim 7 , wherein the fan portion is inflated to expand as it exits the delivery catheter. 
     
     
         13 . The method of  claim 7 , wherein the fan portion is completely removed from the delivery catheter before inflation begins. 
     
     
         14 . The method of  claim 7 , wherein inflation of the fan portion begins while the fan portion is still entirely or partially inside the delivery catheter.