Patents Assigned to Daig Corporation
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Publication number: 20040039382Abstract: A linear lesion ablation catheter includes a conductive ablating portion having a predetermined resistivity profile for ablating tissue in a generally even temperature profile. In one embodiment, the conductive ablating portion is disposed on a distal portion of an elongate flexible member and has a resistance that increases exponentially along its length from a center of the ablating portion to a non-infinite value at opposite ends of the ablating portion. The ablating portion is adapted to produce a generally even temperature profile along a length of its surface when the ablating portion is in contact with a target tissue within a patient's body. In one example, the conductive ablating portion comprises a plurality of electrically connected conductive regions which extend from the center to the opposite ends of the ablating portion.Type: ApplicationFiled: August 29, 2001Publication date: February 26, 2004Applicant: Daig CorporationInventors: Mark W. Kroll, John D. Ockuly, Rajesh Pendakanti
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Patent number: 6540755Abstract: A process for the mapping and/or ablation of accessory pathways around the mitral valve using a retrograde approach by use of ablation and/or mapping catheters guided by precurved guiding introducers. Also disclosed are shapes for the guiding introducers to be used for the ablation and/or mapping of the accessory pathways around the mitral valve using a retrograde approach.Type: GrantFiled: March 19, 2001Date of Patent: April 1, 2003Assignee: Daig CorporationInventors: John D. Ockuly, James A. Hassett
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Patent number: 6526302Abstract: A guiding introducer system for use in the treatment of arrhythmia associated with the left ventricle from the ventricular side comprising an inner guiding introducer and an outer guiding introducer wherein the inner guiding introducer is comprised of a first and second section and the outer guiding introducer is comprised of a first and second sections. The guiding introducer system is for use in sensing, pacing, and ablating procedures in the left ventricle.Type: GrantFiled: December 4, 2000Date of Patent: February 25, 2003Assignee: Daig CorporationInventor: James A. Hassett
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Patent number: 6503247Abstract: A process for the treatment of atrial arrhythmia by use of ablation procedures comprising circumferential ablation of vessels, particularly pulmonary veins associated with the left atrium of the heart. Also disclosed are medical devices used for formation of the circumferential ablation lesions in vessels associated with the heart.Type: GrantFiled: May 16, 2001Date of Patent: January 7, 2003Assignee: Daig CorporationInventors: John F. Swartz, Michael C. Bednarek, Richard E. Stehr, Michael J. Coyle
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Patent number: 6466811Abstract: A device for the mapping of cardiac arrhythmia foci including a catheter body having a distal tip, first and second point electrodes, which are secured to the catheter body and which form a first bipolar pair of electrodes, and third and fourth point electrodes, which are secured to the catheter body and which form a second bipolar pair of electrodes, wherein a line passing between the third and fourth point electrodes is within about 45 degrees of being perpendicular to a line passing through the first and second point electrodes.Type: GrantFiled: May 12, 2000Date of Patent: October 15, 2002Assignee: Daig CorporationInventor: James A. Hassett
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Patent number: 6458107Abstract: A steerable catheter for insertion into the ostium of the coronary sinus in the right atria including a flexible catheter body, and a steerable catheter handle wherein the catheter body includes a generally straight proximal section, a deflectable distal section and a precurved tip portion located at a distal end of the deflectable distal section. Preferably, the precurved tip portion curves outside of a plane formed by the deflectable distal section from about 20 degrees to about 50 degrees.Type: GrantFiled: November 15, 1999Date of Patent: October 1, 2002Assignee: Daig CorporationInventor: John D. Ockuly
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Patent number: 6447507Abstract: An ablation system for ablating cardiac tissue within a chamber of the human heart including a guiding introducer system, a rail, one end of which is contained within the guiding introducer system, and an ablation catheter system which is supported by the guiding introducer system. The guiding introducer system may be a single or multiple guiding introducers. The ablation system may include a slotted sheath which passes over the rail which supports the ablation catheter. A process is disclosed for ablation of cardiac tissue to form a linear lesion utilizing a rail catheter ablation and mapping system which includes a guiding introducer, a rail and an ablation catheter system advanced over the rail.Type: GrantFiled: February 4, 2000Date of Patent: September 10, 2002Assignee: Daig CorporationInventors: Michael C. Bednarek, John F. Swartz, Michael J. Coyle, John D. Ockuly, James A. Hassett
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Patent number: 6438426Abstract: A coronary sinus catheter includes a distal electrode portion with optimally-spaced and sized ring electrodes and a proximal electrode portion with at least one optimally-spaced and sized larger surface electrode. The catheter has all or some of the following features. First, at least one ring electrode of the distal electrode portion includes a first diameter less than a second diameter of at least one, more proximally disposed, ring electrode of the distal electrode portion. Second, at least one ring electrode of the distal electrode portion includes a first width less than a second width of at least one, more proximally disposed, ring electrode of the distal electrode portion. Third, the distal electrode portion includes at least two ring electrodes and the proximal shock electrode includes at least two larger surface coil electrodes. Fourth, the catheter further includes a collapsible section, adjacent the proximal electrode portion, to facilitate positioning of the catheter within the right atrium.Type: GrantFiled: March 23, 2001Date of Patent: August 20, 2002Assignee: Daig CorporationInventors: Michael L. Hofstad, John D. Ockuly, Michael J. Coyle, Mark W. Kroll, Steven E. Scott
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Publication number: 20020029030Abstract: A coronary sinus guiding introducer utilized to introduce medical devices, such as electrode leads, into the coronary sinus of a human heart. This guiding introducer contains a precurved distal portion, which curves through an arc of about 50 to 150 degrees. Preferably, the distal portion contains a pair of generally coplanar curves, wherein the arc of the first curve is from about 20 to about 60 degrees and the arc of the second curve is from about 30 to about 90 degrees and wherein the second curve is generally coplanar with the first curve. In an alternative embodiment, the second curve curves out of a plane formed by the first curve from about 15 to about 90 degrees. In addition, preferably the guiding introducer is splittable. Also disclosed is a process for introducing medical devices through the lumen of the precurved, coronary sinus guiding introducer.Type: ApplicationFiled: August 15, 2001Publication date: March 7, 2002Applicant: Daig CorporationInventors: Keith G. Lurie, Jean Jacques Blanc, David G. Benditt, Daniel J. Starks
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Publication number: 20020026198Abstract: A process for the mapping and/or ablation of accessory pathways around the mitral valve using a retrograde approach by use of ablation and/or mapping catheters guided by precurved guiding introducers. Also disclosed are shapes for the guiding introducers to be used for the ablation and/or mapping of the accessory pathways around the mitral valve using a retrograde approach.Type: ApplicationFiled: March 19, 2001Publication date: February 28, 2002Applicant: Daig CorporationInventors: John D. Ockuly, James A. Hassett
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Publication number: 20020016589Abstract: An ablation catheter is disclosed having proximal and distal ends and an external surface, a lumen contained within the catheter body, a plurality of openings in the surface of the catheter, wherein the openings are in communication with the lumen, one or more electrodes secured within the catheter within the lumen and a source for conductive media to be introduced into the lumen to contact the electrode. The ablation catheter also may contain a conductive media flow control system which controls the flow of the conductive media through the openings in the surface of the catheter.Type: ApplicationFiled: July 17, 2001Publication date: February 7, 2002Applicant: Daig CorporationInventors: John F. Swartz, Michael C. Bednarek, Richard E. Stehr
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Publication number: 20020010425Abstract: A hemostasis cannula unit including a valve housing, a cap, and a hemostasis valve, wherein the hemostasis valve includes a proximal valve gasket and a distal valve gasket compressed against the valve gasket by the valve housing, wherein the proximal valve gasket is the same shape as the distal valve gasket.Type: ApplicationFiled: December 11, 2000Publication date: January 24, 2002Applicant: Daig CorporationInventors: Xiaoping Guo, Richard Stehr, Daniel J. Potter
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Publication number: 20010044645Abstract: A coronary sinus catheter includes a distal electrode portion with optimally-spaced and sized ring electrodes and a proximal electrode portion with at least one optimally-spaced and sized larger surface electrode. The catheter has all or some of the following features. First, at least one ring electrode of the distal electrode portion includes a first diameter less than a second diameter of at least one, more proximally disposed, ring electrode of the distal electrode portion. Second, at least one ring electrode of the distal electrode portion includes a first width less than a second width of at least one, more proximally disposed, ring electrode of the distal electrode portion. Third, the distal electrode portion includes at least two ring electrodes and the proximal shock electrode includes at least two larger surface coil electrodes. Fourth, the catheter further includes a collapsible section, adjacent the proximal electrode portion, to facilitate positioning of the catheter within the right atrium.Type: ApplicationFiled: March 23, 2001Publication date: November 22, 2001Applicant: DAIG CORPORATIONInventors: Michael L. Hofstad, John D. Ockuly, Michael J. Coyle, Mark W. Kroll, Steven E. Scott
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Publication number: 20010041890Abstract: A process for the treatment of atrial arrhythmia by use of ablation procedures comprising circumferential ablation of vessels, particularly pulmonary veins, associated with the left atrium of the heart. Also medical devices for such process including a pair of balloons secured to a catheter with one balloon located within the other balloon and an ablation catheter located within one of the balloons, which devices are used for the formation of a circumferential ablation lesion in the pulmonary vein.Type: ApplicationFiled: March 22, 2001Publication date: November 15, 2001Applicant: Daig CorporationInventors: James A. Hassett, John F. Swartz, Michael C. Bednarek
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Publication number: 20010021849Abstract: A process for the treatment of atrial arrhythmia by use of ablation procedures comprising circumferential ablation of vessels, particularly pulmonary veins associated with the left atrium of the heart. Also disclosed are medical devices used for formation of the circumferential ablation lesions in vessels associated with the heart.Type: ApplicationFiled: May 16, 2001Publication date: September 13, 2001Applicant: Daig CorporationInventors: John F. Swartz, Michael C. Bednarek, Richard E. Stehr, Michael J. Coyle
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Patent number: 6287306Abstract: A linear lesion ablation catheter includes a conductive ablating portion having a predetermined resistivity profile for ablating tissue in a generally even temperature profile. In one embodiment, the conductive ablating portion is disposed on a distal portion of an elongate flexible member and has a resistance that increases exponentially along its length from a center of the ablating portion to a non-infinite value at opposite ends of the ablating portion. The ablating portion is adapted to produce a generally even temperature profile along a length of its surface when the ablating portion is in contact with a target tissue within a patient's body. In one example, the conductive ablating portion comprises a plurality of electrically connected conductive regions which extend from the center to the opposite ends of the ablating portion.Type: GrantFiled: March 25, 1999Date of Patent: September 11, 2001Assignee: Daig CorporationInventors: Mark W. Kroll, John D. Ockuly, Rajesh Pendakanti
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Patent number: 6277107Abstract: A coronary sinus guiding introducer utilized to introduce medical devices, such as electrode leads, into the coronary sinus of a human heart. This guiding introducer contains a precurved distal portion, which curves through an arc of about 50 to 150 degrees. Preferably, the distal portion contains a pair of generally coplanar curves, wherein the arc of the first curve is from about 20 to about 60 degrees and the arc of the second curve is from about 30 to about 90 degrees and wherein the second curve is generally coplanar with the first curve. In an alternative embodiment, the second curve curves out of a plane formed by the first curve from about 15 to about 90 degrees. In addition, preferably the guiding introducer is splittable. Also disclosed is a process for introducing medical devices through the lumen of the precurved, coronary sinus guiding introducer.Type: GrantFiled: May 9, 1997Date of Patent: August 21, 2001Assignee: Daig CorporationInventors: Keith G. Lurie, Jean Jacques Blanc, David G. Benditt, Daniel J. Starks
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Patent number: 6264654Abstract: An ablation catheter is disclosed having proximal and distal ends and an external surface, a lumen contained within the catheter body, a plurality of openings in the surface of the catheter, wherein the openings are in communication with the lumen, one or more electrodes secured within the catheter within the lumen and a source for conductive media to be introduced into the lumen to contact the electrode. The ablation catheter also may contain a conductive media flow control system which controls the flow of the conductive media through the openings in the surface of the catheter.Type: GrantFiled: July 27, 1999Date of Patent: July 24, 2001Assignee: Daig CorporationInventors: John F. Swartz, Michael C. Bednarek, Richard E. Stehr
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Publication number: 20010005783Abstract: A guiding introducer system for use in the treatment of arrhythmia associated with the left ventricle from the ventricular side comprising an inner guiding introducer and an outer guiding introducer wherein the inner guiding introducer is comprised of a first and second section and the outer guiding introducer is comprised of a first and second sections. The guiding introducer system is for use in sensing, pacing, and ablating procedures in the left ventricle.Type: ApplicationFiled: December 4, 2000Publication date: June 28, 2001Applicant: Daig CorporationInventor: James A. Hassett
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Patent number: 6251109Abstract: A process for the treatment of atrial arrhythmia by use of ablation procedures including circumferential ablation of vessels, particularly pulmonary veins, associated with the left atrium of the heart. Also medical devices for such process including a pair of balloons secured to a catheter with one balloon located within the other balloon and an ablation catheter located within one of the balloons, which devices are used for the formation of a circumferential ablation lesion in the pulmonary vein.Type: GrantFiled: January 20, 1999Date of Patent: June 26, 2001Assignee: Daig CorporationInventors: James A. Hassett, John F. Swartz, Michael C. Bednarek