News Column

Patent Issued for Vascular and Bodily Duct Treatment Devices and Methods

August 20, 2014



By a News Reporter-Staff News Editor at Journal of Engineering -- Concentric Medical, Inc. (Fremont, CA) has been issued patent number 8795345, according to news reporting originating out of Alexandria, Virginia, by VerticalNews editors.

The patent's inventors are Grandfield, Ryan M. (Livermore, CA); Wilson, Scott D. (Redwood City, CA); Miller, John H. (Redwood City, CA); Vu, Emily (San Jose, CA); Pedersen, Kirk L. (San Francisco, CA); Bonsignore, Craig L. (Pleasanton, CA); Sanders, Elliot H. (Hilo, HI).

This patent was filed on October 5, 2009 and was published online on August 5, 2014.

From the background information supplied by the inventors, news correspondents obtained the following quote: "Self-expanding prostheses, such as stents, covered stents, vascular grafts, flow diverters, and the like have been developed to treat ducts within the body. Many of the prostheses have been developed to treat blockages within the vasculature and also aneurysms that occur in the brain. What are needed are improved treatment methods and devices for treating the vasculature and other body ducts, such as, for example, aneurysms, stenoses, embolic obstructions, and the like."

Supplementing the background information on this patent, VerticalNews reporters also obtained the inventors' summary information for this patent: "In accordance with one implementation a vascular or bodily duct treatment device is provided that comprises an elongate self-expandable member movable from a first delivery position to a second placement position, in the first delivery position the expandable member being in an unexpanded position and having a nominal first diameter and in the second position the expandable member being in a radially expanded position and having a second nominal diameter greater than the first nominal diameter for deployment within the bodily duct or vasculature of a patient, the expandable member comprising a plurality of cell structures, the expandable member having a proximal end portion with a proximal end, a cylindrical main body portion and a distal end portion with a distal end, the cell structures in the main body portion extending circumferentially around a longitudinal axis of the expandable member, the cell structures in the proximal and distal end portions extending less than circumferentially around the longitudinal axis of the expandable member, the outer-most cell structures in the proximal end portion having proximal-most linear wall segments that, in a two-dimensional view, form first and second substantially linear rail segments that each extend from a position at or near the proximal-most end of the expandable member to a distal position at or near the cylindrical main body portion. In one implementation the self-expandable member has a longitudinal slit extending along at least a portion of the length of the self-expandable member between the proximal end and the distal end.

"In accordance with another implementation a kit is provided that comprises an elongate flexible wire having a proximal end and a distal end with an elongate self-expandable member coupled to the distal end, the self-expandable member movable from a first delivery position to a second placement position, in the first delivery position the expandable member being in an unexpanded position and having a nominal first diameter and in the second position the expandable member being in a radially expanded position and having a second nominal diameter greater than the first nominal diameter for deployment in the bodily duct or vasculature of a patient, the self-expandable member comprising a plurality of cell structures, the self-expandable member having a proximal end portion with a proximal end, a cylindrical main body portion and a distal end portion with a distal end, the cell structures in the main body portion extending circumferentially around a longitudinal axis of the expandable member, the cell structures in the proximal and distal end portions extending less than circumferentially around the longitudinal axis of the expandable member, the outer-most cell structures in the proximal end portion having proximal-most linear wall segments that, in a two-dimensional view, form first and second substantially linear rail segments that each extend from a position at or near the proximal-most end of the expandable member to a distal position at or near the cylindrical main body portion, the elongate wire with the expandable member having a first length; and a delivery catheter having a second length and sufficient flexibility to navigate the vasculature or bodily duct of the patient, the delivery catheter having a proximal end, a distal end and an inner lumen, the inner lumen having a diameter sufficient to receive the self-expandable member in its unexpanded position and for advancing the unexpanded member from the proximal end to the distal end of the catheter, the second length being less than the first length to allow distal advancement of the self-expandable member beyond the distal end of the catheter to permit the expandable member to deploy toward its expanded position, the distal end of the catheter and the self-expandable member configured to permit proximal retraction of the self-expandable member into the lumen of the catheter when the self-expandable member is partially or fully deployed outside the distal end of the catheter. In one implementation, the self-expandable member has a longitudinal slit extending along at least a portion of the length of the self-expandable member between the proximal end and the distal end.

"In accordance with one implementation, a bodily duct or vascular treatment device is provided having an elongate self-expandable member movable from a first delivery position to a second placement position, in the first delivery position the expandable member being in an unexpanded position and having a nominal first diameter and in the second position the expandable member being in a radially expanded position and having a second nominal diameter greater than the first nominal diameter for deployment within the bodily duct or vasculature of a patient, the expandable member comprising a plurality of generally longitudinal undulating elements with adjacent undulating elements being interconnected in a manner to form a plurality of diagonally disposed cell structures, the expandable member having a proximal end portion, a cylindrical main body portion and a distal end portion, the cell structures in the main body portion extending circumferentially around a longitudinal axis of the expandable member, the cell structures in the proximal and distal end portions extending less than circumferentially around the longitudinal axis of the expandable member, the outer-most cell structures in the proximal end portion having proximal-most linear wall segments that, in a two-dimensional view, form first and second substantially linear rail segments that each extend from a position at or near the proximal-most end of the expandable member to a position at or near the cylindrical main body portion. In one implementation, connected to the proximal-most end of the expandable member is a proximally extending elongate flexible wire having a length and flexibility sufficient for navigating and accessing the vasculature or bodily duct of the patient.

"In accordance with another implementation, a vascular treatment device is provided that includes an elongate self-expandable member movable from a first delivery position to a second placement position, in the first delivery position the expandable member being in an unexpanded position and having a nominal first diameter and in the second position the expandable member being in a radially expanded position and having a second nominal diameter greater than the first nominal diameter for deployment within the vasculature of a patient, the expandable member comprising a plurality of generally longitudinal undulating elements with adjacent undulating elements being interconnected in a manner to form a plurality of cell structures that are arranged to induce twisting of the expandable member as the expandable member transitions from the unexpanded position to the expanded position, the expandable member having a proximal end portion, a cylindrical main body portion and a distal end portion, the cell structures in the main body portion extending circumferentially around a longitudinal axis of the expandable member, the cell structures in the proximal and distal end portions extending less than circumferentially around the longitudinal axis of the expandable member, the outer-most cell structures in the proximal end portion having proximal-most linear wall segments that form first and second substantially linear rail segments that each extend from a position at or near the proximal-most end of the expandable member to a position at or near the cylindrical main body portion. In one implementation, connected to the proximal-most end of the expandable member is a proximally extending elongate flexible wire having a length and flexibility sufficient for navigating and accessing the vasculature or bodily duct of the patient.

"In accordance with another implementation, a bodily duct or vascular treatment device is provided that includes an elongate self-expandable member movable from a first delivery position to a second placement position, in the first delivery position the expandable member being in an unexpanded position and having a nominal first diameter and in the second position the expandable member being in a radially expanded position and having a second nominal diameter greater than the first nominal diameter for deployment within the bodily duct or vasculature of a patient, the expandable member comprising a plurality of generally longitudinal undulating elements with adjacent undulating elements being interconnected to form a plurality of diagonally disposed cell structures, the expandable member having a cylindrical portion and a distal end portion, the cell structures in the cylindrical portion extending circumferentially around a longitudinal axis of the expandable member, the cell structures in the distal end portion extending less than circumferentially around the longitudinal axis of the expandable member, the proximal-most cell structures in the main body portion having proximal-most end points. One or more of the proximal-most end points of the expandable member have a proximally extending elongate flexible wire having a length and flexibility sufficient for navigating and accessing the vasculature or bodily duct of the patient.

"In accordance with another implementation, a kit is provided that includes an elongate flexible wire having a proximal end and a distal end with an elongate self-expandable member attached to the distal end, the self-expandable member movable from a first delivery position to a second placement position, in the first delivery position the expandable member being in an unexpanded position and having a nominal first diameter and in the second position the expandable member being in a radially expanded position and having a second nominal diameter greater than the first nominal diameter for deployment within a bodily duct or vasculature of a patient, the expandable member comprising a plurality of generally longitudinal undulating elements with adjacent undulating elements being interconnected in a manner to form a plurality of diagonally disposed cell structures, the expandable member having a proximal end portion, a cylindrical main body portion and a distal end portion, the cell structures in the main body portion extending circumferentially around a longitudinal axis of the expandable member, the cell structures in the proximal and distal end portions extending less than circumferentially around the longitudinal axis of the expandable member, the outer-most cell structures in the proximal end portion having proximal-most linear wall segments that, in a two-dimensional view, form first and second substantially linear rail segments that each extend from a position at or near the proximal-most end of the expandable member to a position at or near the cylindrical main body portion, the elongate wire and expandable member having a first length, and a delivery catheter having a second length and sufficient flexibility to navigate the vasculature or bodily duct of a patient, the delivery catheter having a proximal end, a distal end and an inner diameter, the inner diameter sufficient to receive the expandable member in its unexpanded position and for advancing the unexpanded member from the proximal end to the distal end of the catheter, the second length being less that the first length to allow distal advancement of the expandable member beyond the distal end of the catheter to permit the expandable member to deploy toward its expanded position, the distal end of the catheter and the expandable member configured to permit proximal retraction of the expandable member into the catheter when the expandable member is partially or fully deployed outside the distal end of the catheter.

"In accordance with another implementation, a method for removing an embolic obstruction from a vessel of a patient is provided that includes (a) advancing a delivery catheter having an inner lumen with proximal end and a distal end to the site of an embolic obstruction in the intracranial vasculature of a patient so that the distal end of the inner lumen is positioned distal to the embolic obstruction, the inner lumen having a first length, (b) introducing an embolic obstruction retrieval device comprising an elongate flexible wire having a proximal end and a distal end with an elongate self-expandable member attached to the distal end into the proximal end of the inner lumen of the catheter and advancing the self-expandable member to the distal end of the lumen, the self-expandable member movable from a first delivery position to a second placement position, in the first delivery position the expandable member being in an unexpanded position and having a nominal first diameter and in the second position the expandable member being in a radially expanded position and having a second nominal diameter greater than the first nominal diameter for deployment within an embolic obstruction of a patient, the expandable member comprising a plurality of generally longitudinal undulating elements with adjacent undulating elements being interconnected in a manner to form a plurality of cell structures, the expandable member having a proximal end portion, a cylindrical main body portion and a distal end portion, the cell structures in the main body portion extending circumferentially around a longitudinal axis of the expandable member, the cell structures in the proximal and distal end portions extending less than circumferentially around the longitudinal axis of the expandable member, the outer cell structures in the proximal end portion having proximal linear wall segments that, in a two-dimensional view, form first and second substantially linear rail segments that each extend from a position at or near the proximal end of the expandable member to a position at or near the cylindrical main body portion, the elongate wire and expandable member in combination having a second length longer than the first length, proximally retracting the delivery catheter sufficient to deploy the self-expandable device so that the one or more of the cell structures entrap at least a portion of the embolic obstruction, and (d) proximally retracting the delivery catheter and self-expandable device to outside the patient. In an alternative implementation, the self-expandable member is partially or fully retracted into the inner lumen of the delivery catheter prior to proximally retracting the delivery catheter and self-expandable device to outside the patient."

For the URL and additional information on this patent, see: Grandfield, Ryan M.; Wilson, Scott D.; Miller, John H.; Vu, Emily; Pedersen, Kirk L.; Bonsignore, Craig L.; Sanders, Elliot H.. Vascular and Bodily Duct Treatment Devices and Methods. U.S. Patent Number 8795345, filed October 5, 2009, and published online on August 5, 2014. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=8795345.PN.&OS=PN/8795345RS=PN/8795345

Keywords for this news article include: .

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Source: Journal of Engineering


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