Retractable and rapid disconnect, floating diameter embolic coil product and delivery system

Abstract

A vaso-occlusive device, delivery system and method of delivery to a selected site of the vessel in a manner allowing the vaso-occlusive device to substantially assumes a diameter of an inner surface of the vessel or aneurism sac at the site of the embolization procedure. The vaso-occlusive device or embolic coil has specific properties of wanting to float and conform to the diameter of the aneurysm sac thereby enabling retractability and rapid disconnect detachment for such embolic coil, and a predetermined shape requiring fewer embolic coils per embolization procedure advantageously improving patient risk, and the cost and time of the procedure. A method for deploying the embolic coil with such specific properties to the site of an aneurysm using a delivery system configured for deploying the embolic coil features inserting, and/or reconnecting for positioning and reinserting the embolic coil.

What is claimed is: 
     
         1 . A system for delivering a vaso-occlusive device, comprising:
 delivery assembly comprising a delivery tube having proximal and distal ends, an intermediate spring coil secured to said distal end of the delivery tube, and a gripper assembly secured to a distal coil portion having a jaw configured to open and close, said delivery assembly configured to pass within a catheter; and   a member configured to re-connect to said gripper assembly of said delivery assembly, said member having a predetermined shape along its length when said member is in a relaxed condition.   
     
     
         2 . The system of  claim 1 , wherein the member comprises a coil. 
     
     
         3 . The system of  claim 1 , wherein said gripper assembly can be actuated to release said member with no mechanical force being applied by said gripper assembly to disconnect from said member. 
     
     
         4 . The system of  claim 1 , wherein said predetermined shape of said member comprises a primary coil arrangement defined by curvatures extending along a length of said member between a proximal end and a distal end. 
     
     
         5 . The system of  claim 1 , wherein said predetermined shape of said member has a secondary coil arrangement defined by a second set of arcuate extending along a length of said member between a proximal end and a distal end. 
     
     
         6 . The system of  claim 5 , wherein said arcuate curvatures along said length of said member are configured with an upper crest portion and a lower trough portion of second set of arcuate curvatures acutely extend toward one another, thereby defining a series of offset semi-circles arranged about a longitudinal axis of the secondary configuration of said member between the proximal and distal end. 
     
     
         7 . The system of  claim 6 , wherein said arcuate curvatures are waveform-like. 
     
     
         8 . The system of  claim 7 , wherein said arcuate curvatures are uniform in height of the peak and depth of the trough along a trajectory of said member between a proximal end and a distal end. 
     
     
         9 . The system of  claim 7 , wherein said arcuate curvatures are random in height of the peak and depth of the trough along a trajectory of said member between a proximal end and a distal end. 
     
     
         10 . The system of  claim 1 , wherein a proximal end of the member is detachable from said gripper assembly of the delivery assembly. 
     
     
         11 . The system of  claim 1 , wherein a proximal end of the member is electro-mechanically detachable from the delivery assembly. 
     
     
         12 . The system of  claim 1 , wherein a proximal end of the member is a proximal end of the member is mechanically detachable from the delivery assembly. 
     
     
         13 . The system of  claim 1 , wherein a proximal end of the member is wherein a proximal end of the member is chemically detachable from the delivery assembly. 
     
     
         14 . The system of  claim 1 , wherein a proximal end of the member is wherein a proximal end of the member is thermally detachable from the delivery assembly. 
     
     
         15 . The system of  claim 1 , wherein a proximal end of the member is wherein a proximal end of the member is electrolytically detachable from the delivery assembly. 
     
     
         16 . The system of  claim 1 , wherein a jaw of the delivery assembly has zero force disconnect with a proximal end of said member. 
     
     
         17 . The system of  claim 1 , wherein a mechanical jaw of the delivery assembly has low deployment force to disconnect with a proximal end of said member. 
     
     
         18 . A vaso-occlusive device, comprising:
 a member having a predetermined shape along its length when said member is in a relaxed condition to substantially assumes a shape of an inner surface of the vessel at a site of an embolization procedure.   
     
     
         19 . The vaso-occlusive device of  claim 18 , wherein said member is configured can be utilized for a range of diameters of the vessel or aneurysm sac. 
     
     
         20 . The vaso-occlusive device of  claim 18 , said member is configured with a proximal loop orthogonal to the plane of a delivery assembly and said proximal loop is adapted for re-connection to a gripper assembly of said delivery assembly. 
     
     
         21 . The vaso-occlusive device of  claim 18 , comprises a coil. 
     
     
         22 . The vaso-occlusive device of  claim 18 , wherein said member has zero force disconnect and low deployment force. 
     
     
         23 . The vaso-occlusive device of  claim 18 , wherein said predetermined shape of said member comprises a primary coil arrangement defined by curvatures extending along a length of said member between a proximal end and a distal end. 
     
     
         24 . The vaso-occlusive device of  claim 18 , wherein said predetermined shape of said member has a secondary coil arrangement defined by a second set of arcuate extending along a length of said member between a proximal end and a distal end. 
     
     
         25 . The vaso-occlusive device of  claim 18 , wherein said arcuate curvatures along said length of said member are configured with an upper crest portion and a lower trough portion of second set of arcuate curvatures acutely extend toward one another, thereby defining a series of offset semi-circles arranged about a longitudinal axis of the secondary configuration of said member between the proximal and distal end. 
     
     
         26 . The vaso-occlusive device of  claim 25 , wherein said arcuate curvatures are waveform-like can be uniform or random in height of the peak and depth of the trough along a trajectory of said member between a proximal end and a distal end. 
     
     
         27 . The vaso-occlusive device of  claim 18 , wherein a proximal end of the member is electro-mechanically detachable from the delivery assembly. 
     
     
         28 . The vaso-occlusive device of  claim 18 , wherein a proximal end of the member is a proximal end of the member is mechanically detachable from the delivery assembly. 
     
     
         29 . The vaso-occlusive device of  claim 18 , wherein a proximal end of the member is wherein a proximal end of the member is chemically detachable from the delivery assembly. 
     
     
         30 . The vaso-occlusive device of  claim 18 , wherein a proximal end of the member is wherein a proximal end of the member is thermally detachable from the delivery assembly. 
     
     
         31 . The vaso-occlusive device of  claim 18 , wherein said member is formed from a shape-memory alloy from the group of a biocompatible metal wire, NiTi, platinum, tungsten, titanium, gold, iridium, palladium, tantalum, or a platinum alloy. 
     
     
         32 . The vaso-occlusive device of  claim 18 , wherein said member is formed from a shape-shape settable alloy from the group of a biocompatible metal wire, platinum, tungsten, titanium, gold, iridium, palladium, tantalum, or a platinum alloy. 
     
     
         33 . A method of occluding a selected site in a vessel with a vaso-occlusive device, the method comprising the steps of:
 accessing the site with a delivery assembly;   deploying the vaso-occlusive device from said delivery assembly into the selected site of the vessel in a manner allowing the vaso-occlusive device to substantially assumes a shape of an inner surface of the vessel at the site.   
     
     
         34 . A method of  claim 33 , comprising the added step of: connecting said delivery assembly to the vaso-occlusive device in the vessel in during an embolization procedure. 
     
     
         35 . A method of  claim 33 , comprising the added step of: deploying subsequent secondary and/or filler vaso-occlusive devices from said delivery assembly into the selected site of the vessel so as to fill and stabilize to the interior shape of the deployed the vaso-occlusive device that assumed the shape of the inner surface of the vessel at the site, thereby causing blood to coagulate and form thrombus which fills the vessel so as to prevent the rupture of the vessel and subsequent bleeding. 
     
     
         36 . A method of occluding a selected site in a vessel with a vaso-occlusive device, the method comprising the steps of:
 accessing the site with a delivery assembly;   deploying the vaso-occlusive device from said delivery assembly into the selected site of the vessel in a manner allowing the vaso-occlusive device to substantially assumes a diameter of an inner surface of the vessel at the site.   
     
     
         37 . A method of  claim 36 , whereby the method comprising the added step of:
 connecting said delivery assembly to the vaso-occlusive device in the vessel in during an embolization procedure.   
     
     
         38 . A method of  claim 36 , comprising the added step of: deploying subsequent secondary and/or filler vaso-occlusive devices from said delivery assembly into the selected site of the vessel so as to fill and stabilize to the interior shape of the deployed the vaso-occlusive device that assumed the diameter of the inner surface of the vessel at the site thereby causing blood to coagulate and form thrombus which fills the vessel so as to prevent the rupture of the vessel and subsequent bleeding. 
     
     
         39 . A method of occluding a selected site in a vessel with a vaso-occlusive device, the method comprising the steps of:
 accessing the site with a delivery assembly;   deploying the vaso-occlusive device from said delivery assembly into the selected site of the vessel in a manner allowing the vaso-occlusive device to substantially assumes a shape of an inner surface of the vessel at the site; and   connecting said delivery assembly to the vaso-occlusive device in the vessel in during an embolization procedure.   
     
     
         40 . A method of  claim 39 , comprising the added step of: deploying subsequent secondary and/or filler vaso-occlusive devices from said delivery assembly into the selected site of the vessel so as to fill and stabilize to the interior shape of the deployed the vaso-occlusive device that assumed the shape of the inner surface of the vessel at the site thereby causing blood to coagulate and form thrombus which fills the vessel so as to prevent the rupture of the vessel and subsequent bleeding. 
     
     
         41 . A system for delivery of a vaso-occlusive device to a location in a patient's vasculature, comprising:
 a delivery tube having proximal and distal ends, an intermediate spring coil secured to said distal end of the delivery tube, and a gripper assembly secured to a distal coil portion having a jaw configured to open and close, said delivery assembly configured to pass within a catheter   a core wire disposed in said intermediate spring coil of said delivery tube, said core wire being electrically coupled to said gripper assembly, said core wire forming a first conductive path to said gripper assembly,   a ground wire disposed in said intermediate spring coil of said delivery tube, said ground wire being electrically coupled to said gripper assembly, said ground wire forming a return conductive path from said gripper assembly,   an electrical contact positively bias coupled to a proximal end of said core wire and a proximal end of said ground wire, whereby an electrical circuit is formed to said gripper assembly so that by energizing said electrical contact said jaw moves to an open position.   
     
     
         42 . The delivery system of  claim 41 , further comprising a connector for electro-thermally connecting a distal end of said core wire and said ground wire to an opening of a tip opposite said jaw of said gripper assembly. 
     
     
         43 . The delivery system of  claim 41 , wherein said jaw of said gripper assembly has an opening and a recess configured to hold the vaso-occlusive device for delivery to the location in a patient's vasculature. 
     
     
         44 . The delivery system of  claim 41 , wherein said jaw of said gripper assembly is configured to connect to the vaso-occlusive device deployed to the location in a patient's vasculature in an embolization procedure and by energizing said electrical contact said jaw moves to an open position and halting energizing said jaw moves to a closed position. 
     
     
         45 . The delivery system of  claim 41 , wherein a jaw of the delivery assembly has zero force disconnect with a proximal end of said member. 
     
     
         46 . The delivery system of  claim 41 , wherein a mechanical jaw of the delivery assembly has low deployment force to disconnect with a proximal end of said member. 
     
     
         47 . The delivery system of  claim 41 , wherein said jaw of said gripper assembly comprises a shape-memory alloy from the group of a biocompatible metal wire, NiTi, platinum, tungsten, titanium, gold, iridium, palladium, tantalum, or a platinum alloy. 
     
     
         48 . The delivery system of  claim 41 , wherein said jaw is formed from a shape-shape settable alloys from the group of a biocompatible metal wire, platinum, tungsten, titanium, gold, iridium, palladium, tantalum, or a platinum alloy. 
     
     
         49 . The delivery system of  claim 41 , further including a pull wire to actuate a mechanical jaw of said gripper assembly. 
     
     
         50 . The delivery system of  claim 49 , wherein said pull wire is formed from a shape-memory alloy from the group of a biocompatible metal wire, NiTi, platinum, tungsten, titanium, gold, iridium, palladium, tantalum, or a platinum alloy. 
     
     
         51 . The delivery system of  claim 50 , wherein said pull wire is formed from a shape-shape settable alloy from the group of a biocompatible metal wire, platinum, tungsten, titanium, gold, iridium, palladium, tantalum, or a platinum alloy.