Patents by Inventor James Calvin Allan
James Calvin Allan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20130253309Abstract: In one example, this disclosure is directed to a method for intravascular implantation of an implantable medical device comprising positioning a distal end of an elongated outer sheath forming an inner lumen adjacent a target site within a vasculature of a patient, and partially deploying an implantable medical device from the distal opening, wherein the implantable medical device includes an expandable fixation element. A portion of the expandable fixation element assumes an expanded position when the implantable medical device is partially deployed from the distal opening. The method including advancing the distal end of the outer sheath within the vasculature with the implantable medical device partially deployed from the distal opening, and monitoring at least one of the vasculature and the portion of the expandable fixation element for deflection to determine when the size of the portion of the expandable fixation element corresponds to the size of the vasculature.Type: ApplicationFiled: May 29, 2012Publication date: September 26, 2013Applicant: MEDTRONIC, INC.Inventors: James Calvin Allan, Erik C. Griswold, William J. Havel, Steven L. Waldhauser, Kelly M. Wien, Kendra Yasger, Rudolph A. Beasley, Jon D. Schell, Don H. Tran
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Patent number: 8478431Abstract: A fixation device for retaining a leadless medical implant to tissue includes an array of elongate tines having self-expanding distal portions. The fixation tines may be advanced between an implant body and an outer jacket to deploy the tines from a delivery configuration in which the tines are constrained by the outer jacket to an expanded configuration in which the distal end portions of the tines are released from the outer jacket. The implant and fixation device are contained within a sheath for delivery to the treatment site and a pusher within the sheath advances the fixation device relative to the implant body and deploys the tines. A distal end of the implant having an electrode may form a distal tip of the delivery system, and a potential implantation site may be tested prior to deployment of the fixation device to allow for easy repositioning of the implant.Type: GrantFiled: March 14, 2011Date of Patent: July 2, 2013Assignee: Medtronic, Inc.Inventors: Erik Griswold, James Calvin Allan, Don Tran
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Patent number: 8475372Abstract: An implantable medical device, such as a sensor for monitoring a selected internally detectable physiological parameter of a patient, is attached to a fixation member that is deployable within the patient to position and orient the sensor to enable it to perform its function. The fixation member may be configured to lie in a single plane when deployed or may be tubular in shape. The attachment of the housing and fixation member includes providing the fixation member with a linear attachment strut that is non-circular in cross section and providing the housing with external members that define an elongate channel, non-circular in cross section and receptive to the attachment strut. The attachment strut can be inserted transversely into the channel and the external member can be crimped over the strut to secure the housing and fixation member together.Type: GrantFiled: April 20, 2011Date of Patent: July 2, 2013Assignee: Medtronic Vascular, Inc.Inventors: Jon D. Schell, George Patras, Kamal Deep Mothilal, Erik Griswold, James Calvin Allan, Albert Dunfee, Rudy Beasley
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Patent number: 8412352Abstract: This disclosure is directed to an implantable medical device having a housing that encloses at least a communication module. The implantable medical device also includes a first electrode electrically coupled to the communication module and an electrically conductive fixation mechanism that is mechanically coupled to the housing and electrically coupled to the communication module within the housing. The electrically conductive fixation mechanism includes a dielectric material that covers part of a surface of the fixation mechanism. A portion of the electrically conductive fixation mechanism is not covered by the dielectric material such that the portion of the electrically conductive fixation mechanism is exposed to form a second electrode that is electrically coupled to the communication module. The communication module is configured to communicate using the first electrode and second electrode.Type: GrantFiled: March 15, 2011Date of Patent: April 2, 2013Assignee: Medtronic, Inc.Inventors: Erik C. Griswold, James Calvin Allan
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Patent number: 8401643Abstract: A medical device adapted to be implanted in a vessel of a human body includes a housing that contains a diagnostic or therapeutic module and an anchor for supporting the housing in an intended location and orientation within the vessel. The anchor is expandable from a low profile configuration adapted for delivery to an expanded configuration for engagement with the vessel wall. The anchor and a delivery catheter are adapted to enable the medical device to be retrieved and repositioned or removed from the vessel. The anchor is adapted to apply sufficient force against the vessel wall to maintain the anchor in place but less force than that required to provide scaffolding support for the vessel.Type: GrantFiled: May 17, 2011Date of Patent: March 19, 2013Assignee: Medtronic Vascular, Inc.Inventors: Erik Griswold, James Calvin Allan, Rudy Beasley
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Publication number: 20130035636Abstract: A delivery catheter and method for delivering and deploying an implantable medical device include a mechanical latch by which the device can remain firmly attached at a single point of connection to the delivery catheter during deployment of the device. The delivery catheter provides simple yet firm control of the release mechanism to enable the clinician to confirm the accuracy of the deployment before releasing the tether or, if the placement of the device should be corrected, the tether can be maintained while the device is recaptured and repositioned or removed from the patient.Type: ApplicationFiled: August 3, 2011Publication date: February 7, 2013Applicant: Medtronic Vascular, Inc.Inventors: Rudy Beasley, William Chang, Sina Som, Don Tran, James Calvin Allan
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Publication number: 20120296222Abstract: A medical device adapted to be implanted in a vessel of a human body includes a housing that contains means for performing medical functions and an anchor for supporting the housing in an intended location and orientation within the vessel. The anchor is expandable from a low profile configuration adapted for delivery to an expanded configuration for engagement with the vessel wall. The anchor and delivery device are adapted to enable the medical device to be retrieved and repositioned or removed from the vessel. The anchor is adapted to apply sufficient force against the vessel wall to maintain the anchor in place but less force than that required to provide scaffolding support for the vessel.Type: ApplicationFiled: May 17, 2011Publication date: November 22, 2012Applicant: Medtronic Vascular, Inc.Inventors: Erik Griswold, James Calvin Allan, Rudy Beasley
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Publication number: 20120291788Abstract: A medical device adapted to be implanted in a vessel of a human body includes a housing that contains means for performing medical functions and an anchor for supporting the housing in an intended location and orientation within the vessel. The anchor is expandable from a low profile configuration adapted for delivery to an expanded configuration for engagement with the vessel wall. The anchor and delivery device are adapted to enable the medical device to be retrieved and repositioned or removed from the vessel. The anchor is adapted to apply sufficient force against the vessel wall to maintain the anchor in place but less force than that required to provide scaffolding support for the vessel.Type: ApplicationFiled: May 17, 2011Publication date: November 22, 2012Applicant: Medtronic Vascular, Inc.Inventors: Erik Griswold, James Calvin Allan, Rudy Beasley
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Publication number: 20120271134Abstract: A delivery device for implanting a medical device that includes an expandable fixation member adapted to fix the position of the medical device within a lumen of a human body. The delivery device has an inner shaft rotatably disposed in a tubular outer shaft. A retention member is secured to and rotatable with the inner shaft and has a free end and a retainer portion adapted to protrude outwardly through an exit aperture in the outer shaft to extend circumferentially about the exterior of the outer shaft. The fixation member of the medical device may be retained on the tubular shaft in a low profile configuration by the outwardly protruding retainer portion and may be released to expand upon retraction of the retainer portion in response to rotation of the inner shaft.Type: ApplicationFiled: April 20, 2011Publication date: October 25, 2012Applicant: Medtronic Vascular, Inc.Inventors: James Calvin Allan, Don Tran, Erik Griswold, Rudy Beasley, Arvind Srinivas
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Publication number: 20120197349Abstract: This disclosure is directed to an implantable medical device having a housing that encloses at least a communication module. The implantable medical device also includes a first electrode electrically coupled to the communication module and an electrically conductive fixation mechanism that is mechanically coupled to the housing and electrically coupled to the communication module within the housing. The electrically conductive fixation mechanism includes a dielectric material that covers part of a surface of the fixation mechanism. A portion of the electrically conductive fixation mechanism is not covered by the dielectric material such that the portion of the electrically conductive fixation mechanism is exposed to form a second electrode that is electrically coupled to the communication module. The communication module is configured to communicate using the first electrode and second electrode.Type: ApplicationFiled: March 15, 2011Publication date: August 2, 2012Inventors: Erik C. Griswold, James Calvin Allan
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Publication number: 20120108922Abstract: An implantable medical device, such as a sensor for monitoring a selected internally detectable physiological parameter of a patient, is attached to a fixation member that is deployable within the patient to position and orient the sensor to enable it to perform its function. The fixation member may be configured to lie in a single plane when deployed or may be tubular in shape. The attachment of the housing and fixation member includes providing the fixation member with a linear attachment strut that is non-circular in cross section and providing the housing with external members that define an elongate channel, non-circular in cross section and receptive to the attachment strut. The attachment strut can be inserted transversely into the channel and the external member can be crimped over the strut to secure the housing and fixation member together.Type: ApplicationFiled: April 20, 2011Publication date: May 3, 2012Applicant: Medtronic Vascular, Inc.Inventors: Jon D. Schell, George Patras, Kamal Deep Mothilal, Erik Griswold, James Calvin Allan, Albert Dunfee, Rudy Beasley
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Publication number: 20120108986Abstract: An implantable medical device, such as a sensor for monitoring a selected internally detectable physiological parameter of a patient, is attached to a fixation member that is deployable within the patient to position and orient the sensor to enable it to perform its function. The fixation member may be configured to lie in a single plane when deployed or may be tubular in shape. The attachment of the housing and fixation member includes providing the fixation member with a linear attachment strut that is non-circular in cross section and providing the housing with external members that define an elongate channel, non-circular in cross section and receptive to the attachment strut. The attachment strut can be inserted transversely into the channel and the external member can be crimped over the strut to secure the housing and fixation member together.Type: ApplicationFiled: April 20, 2011Publication date: May 3, 2012Applicant: Medtronic Vascular, Inc.Inventors: Rudy Beasley, Erik Griswold, James Calvin Allan, George Patras, Kamal Deep Mothilal, Albert Dunfee
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Publication number: 20110251662Abstract: A fixation device for retaining a leadless medical implant to tissue includes an array of elongate tines having self-expanding distal portions. The fixation tines may be advanced between an implant body and an outer jacket to deploy the tines from a delivery configuration in which the tines are constrained by the outer jacket to an expanded configuration in which the distal end portions of the tines are released from the outer jacket. The implant and fixation device are contained within a sheath for delivery to the treatment site and a pusher within the sheath advances the fixation device relative to the implant body and deploys the tines. A distal end of the implant having an electrode may form a distal tip of the delivery system, and a potential implantation site may be tested prior to deployment of the fixation device to allow for easy repositioning of the implant.Type: ApplicationFiled: March 14, 2011Publication date: October 13, 2011Applicant: Medtronic Vascular, Inc.Inventors: Erik Griswold, James Calvin Allan, Don Tran