Patents by Inventor Steven R. Christenson
Steven R. Christenson 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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Patent number: 9737660Abstract: A therapeutic fluid delivery device that includes at least one controllable valve is generally described. In one example, an implantable therapeutic fluid delivery system includes a first fluid pathway configured to convey a first therapeutic fluid and a second fluid pathway configured to convey a second therapeutic fluid, the second fluid pathway being separate from the first fluid pathway. The therapeutic fluid delivery system includes a valve connected to the first fluid pathway and the second fluid pathway, and a processor configured to control actuation of the valve to open and close the first fluid pathway and to open and close the second fluid pathway.Type: GrantFiled: August 25, 2011Date of Patent: August 22, 2017Assignee: Medtronic, Inc.Inventors: Reginald D. Robinson, Mary E. Robischon, Bernard Q. Li, Irfan Z. Ali, Steven R. Christenson, Keith A. Miesel
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Patent number: 9259530Abstract: An implantable infusion device includes a positive pressure reservoir, a pump, a flow restrictor, and an outlet. The device includes a first fluid flow path from the reservoir to the outlet, where the pump is downstream of the reservoir, and the outlet is downstream of the pump. The device further includes a second fluid flow path from the reservoir to the outlet, where the flow restrictor is downstream of the reservoir, and the outlet is downstream of the restrictor. The device may also include one or more controllable, MRI-safe valves to select whether fluid is delivered via the first or second flow path.Type: GrantFiled: November 25, 2009Date of Patent: February 16, 2016Assignee: Medtronic, Inc.Inventor: Steven R. Christenson
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Publication number: 20140371544Abstract: Devices, systems, and techniques for analyzing video information to objectively identify patient behavior are disclosed. A system may analyze obtained video information of patient motion during a period of time to track one or more anatomical regions through a plurality of frames of the video information and calculate one or more movement parameters of the one or more anatomical regions. The system may also compare the one or more movement parameters to respective criteria for each of a plurality of predetermined patient behaviors and identify the patient behaviors that occurred during the period of time. In some examples, a device may control therapy delivery according to the identified patient behaviors and/or sensed parameters previously calibrated based on the identified patient behaviors.Type: ApplicationFiled: December 12, 2013Publication date: December 18, 2014Applicant: Medtronic, Inc.Inventors: Jianping Wu, Dwight E. Nelson, Chih Lai, Xuan Wei, Steven R. Christenson
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Patent number: 8608729Abstract: An implantable infusion device for delivering a fluid medication to a patient. The infusion device has an internal bacterial filter positioned between the reservoir and the pump, configured to provide a pathway for fluid to be pulled from the reservoir to the pump, regardless of the orientation of the infusion device. The configuration of the filter provides a fluid pathway from the reservoir to the pump, even in the presence of a gas bubble.Type: GrantFiled: April 18, 2008Date of Patent: December 17, 2013Assignee: Medtronic, Inc.Inventor: Steven R. Christenson
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Patent number: 8444609Abstract: A system including an implantable delivery device having a housing, a reservoir, fill and catheter access ports, and a denial device. The housing maintains the fill port in fluid communication with the reservoir. The catheter access port includes a septum between an inlet and a well. The denial device includes a pin, a biasing element, and a solenoid. The pin is arranged to be movable between a first position in which the pin blocks passage of a needle into the well and a second position, with the biasing element biasing the pin to the first position. The solenoid is operatively coupled to the pin and provides an energized and de-energized states; in the energized state, the solenoid moves the pin from the first position to the second position to permit access to the well. An external controller effectuating clinician control over operation of the denial device is also provided.Type: GrantFiled: April 28, 2006Date of Patent: May 21, 2013Assignee: Medtronic, Inc.Inventors: Steven R. Christenson, Irfan Z. Ali
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Publication number: 20120053514Abstract: A therapeutic fluid delivery device that includes at least one controllable valve is generally described. In one example, an implantable therapeutic fluid delivery system includes a first fluid pathway configured to convey a first therapeutic fluid and a second fluid pathway configured to convey a second therapeutic fluid, the second fluid pathway being separate from the first fluid pathway. The therapeutic fluid delivery system includes a valve connected to the first fluid pathway and the second fluid pathway, and a processor configured to control actuation of the value to open and close the first fluid pathway and to open and close the second fluid pathway.Type: ApplicationFiled: August 25, 2011Publication date: March 1, 2012Applicant: Medtronic, Inc.Inventors: Reginald D. Robinson, Mary E. Robischon, Bernard Q. Li, Irfan Z. Ali, Steven R. Christenson, Keith A. Miesel
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Publication number: 20110125137Abstract: An implantable infusion device includes a positive pressure reservoir, a pump, a flow restrictor, and an outlet. The device includes a first fluid flow path from the reservoir to the outlet, where the pump is downstream of the reservoir, and the outlet is downstream of the pump. The device further includes a second fluid flow path from the reservoir to the outlet, where the flow restrictor is downstream of the reservoir, and the outlet is downstream of the restrictor. The device may also include one or more controllable, MRI-safe valves to select whether fluid is delivered via the first or second flow path.Type: ApplicationFiled: November 25, 2009Publication date: May 26, 2011Applicant: MEDTRONIC, INC.Inventor: Steven R. Christenson
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Publication number: 20090264870Abstract: An implantable infusion device for delivering a fluid medication to a patient. The infusion device has an internal bacterial filter positioned between the reservoir and the pump, configured to provide a pathway for fluid to be pulled from the reservoir to the pump, regardless of the orientation of the infusion device. The configuration of the filter provides a fluid pathway from the reservoir to the pump, even in the presence of a gas bubble.Type: ApplicationFiled: April 18, 2008Publication date: October 22, 2009Applicant: MEDTRONIC, INC.Inventor: Steven R. Christenson
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Patent number: 7434312Abstract: An implantable drug infusion device includes a pump tube for holding a liquid to be pumped. A race is configured to support the pump tube. A roller assembly is configured to compress the tube against the race at one or more points along the path, and the roller assembly includes at least one roller and a hub. A drive assembly drives the roller assembly relative to the tube along the path so as to move the liquid through the tube. A retracting roller is operably connected to the hub and/or one or more adjacent rollers to permit retraction of the roller during installation of the pump tube between the roller and the race.Type: GrantFiled: April 16, 2004Date of Patent: October 14, 2008Assignee: Medtronic, Inc.Inventors: Steven R. Christenson, Reginald D. Robinson, Kenneth T. Heruth, James M. Haase, Mandred K. Luedi
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Patent number: 7264611Abstract: A medical device known as an implantable infusion device is configured for implanting in humans to deliver a therapeutic substance such as pharmaceutical compositions, genetic materials, and biologics to treat a variety of medical conditions such as pain, spasticity, cancer, and many other conditions. The infusion device incorporates a motor coil connector and mechanical sealing system between the clean motor compartment and the potentially corrosive pump compartment that provides a reliable electrical connection between the motor coil and the motor drive electronics. The motor coil connector provides for bonding of a very small diameter coil wire to one end of the connector and a highly corrosion resistant connection at the other end of the connector. Additionally, the motor coil connector and mechanical sealing system provides a seal against harmful corrosion materials that could emanate from the pump compartment and reach the motor compartment and cause malfunction of the motor.Type: GrantFiled: May 31, 2002Date of Patent: September 4, 2007Assignee: Medtronic, Inc.Inventors: Steven R. Christenson, Mark S. Lent, Christian Peclat
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Publication number: 20040199118Abstract: An implantable drug infusion device includes a pump tube for holding a liquid to be pumped. A race is configured to support the pump tube. A roller assembly is configured to compress the tube against the race at one or more points along the path, and the roller assembly includes at least one roller and a hub. A drive assembly drives the roller assembly relative to the tube along the path so as to move the liquid through the tube. A retracting roller is operably connected to the hub and/or one or more adjacent rollers to permit retraction of the roller during installation of the pump tube between the roller and the race.Type: ApplicationFiled: April 16, 2004Publication date: October 7, 2004Applicant: Medtronic, Inc.Inventors: Steven R. Christenson, Reginald D. Robinson, Kenneth T. Heruth, James M. Haase, Manfred K. Luedi
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Patent number: 6743204Abstract: An implantable drug infusion device includes a pump tube for holding a liquid to be pumped. A race is configured to support the pump tube. A roller assembly is configured to compress the tube against the race at one or more points along the path, and the roller assembly includes at least one roller and a hub. A drive assembly drives the roller assembly relative to the tube along the path so as to move the liquid through the tube. A retracting roller is operably connected to the hub and/or one or more adjacent rollers to permit retraction of the roller during installation of the pump tube between the roller and the race.Type: GrantFiled: April 13, 2001Date of Patent: June 1, 2004Assignee: Medtronic, Inc.Inventors: Steven R. Christenson, Reginald D. Robinson, Kenneth T. Heruth, James M. Haase, Manfred Luedi
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Patent number: 6733476Abstract: An implantable drug infusion device includes a pump tube for holding a liquid to be pumped. A race is configured to support the pump tube. A roller assembly is configured to compress the tube against the race at one or more points along the path, and the roller assembly includes at least one roller. A drive assembly drives the roller assembly relative to the tube along the path so as to move the liquid through the tube. At least two biasing members are operably connected to the roller to bias the roller against the tube, the two biasing members forming an angle.Type: GrantFiled: April 13, 2001Date of Patent: May 11, 2004Assignee: Medtronic, Inc.Inventors: Steven R. Christenson, James Randall, Micheal Thomas Hegland, James M. Haase, Mark S. Lent, William H. Monsen
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Publication number: 20030225372Abstract: A medical device known as an implantable infusion device is configured for implanting in humans to deliver a therapeutic substance such as pharmaceutical compositions, genetic materials, and biologics to treat a variety of medical conditions such as pain, spasticity, cancer, and many other conditions. The infusion device incorporates a motor coil connector and mechanical sealing system between the clean motor compartment and the potentially corrosive pump compartment that provides a reliable electrical connection between the motor coil and the motor drive electronics. The motor coil connector provides for bonding of a very small diameter coil wire to one end of the connector and a highly corrosion resistant connection at the other end of the connector. Additionally, the motor coil connector and mechanical sealing system provides a seal against harmful corrosion materials that could emanate from the pump compartment and reach the motor compartment and cause malfunction of the motor.Type: ApplicationFiled: May 31, 2002Publication date: December 4, 2003Inventors: Steven R. Christenson, Mark S. Lent, Christian Peclat
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Patent number: 6645176Abstract: An implantable drug infusion device includes a pump tube for holding a liquid to be pumped. A race is configured to support the tube. A roller assembly is configured to compress the tube against the race at one or more points along the path, and the roller assembly includes at least one roller. A drive assembly drives the roller assembly relative to the tube along the path so as to move the liquid through the tube. A biasing member is operably connected to the at least one roller to bias the at least one roller against the tube.Type: GrantFiled: April 28, 2000Date of Patent: November 11, 2003Assignee: Medtronic, Inc.Inventors: Steven R. Christenson, Reginald D. Robinson, Kenneth T. Heruth, James M. Haase, James Randall, Christian Pèclat, Manfred K. Lüedi
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Patent number: 6626867Abstract: An implantable drug infusion device includes a pump tube for holding a liquid to be pumped. A race is configured to support the tube. A roller assembly is configured to compress the tube against the race at one or more points along the path, and the roller assembly includes at least one roller. A tube guide is operably connected to the roller assembly to align the pump tube with respect to a corresponding roller.Type: GrantFiled: April 28, 2000Date of Patent: September 30, 2003Assignee: Medtronic, Inc.Inventors: Steven R. Christenson, Reginald D. Robinson, James M. Haase, Manfred K. Lüedi
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Patent number: 6485464Abstract: An implantable drug infusion device includes a pumphead assembly and a motor assembly operably connected to the pumphead assembly. The motor assembly is adjacent to and laterally offset from the pumphead assembly, advantageously reducing the overall height of the implantable drug infusion device.Type: GrantFiled: April 28, 2000Date of Patent: November 26, 2002Assignee: Medtronic, Inc.Inventors: Steven R. Christenson, Reginald D. Robinson, Kenneth T. Heruth, James Randall, Manfred K. L{overscore (u)}edi, Christian Pèclat
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Publication number: 20020173755Abstract: An implantable drug infusion device includes a pump tube for holding a liquid to be pumped. A race is configured to support the pump tube. A roller assembly is configured to compress the tube against the race at one or more points along the path, and the roller assembly includes at least one roller. A drive assembly drives the roller assembly relative to the tube along the path so as to move the liquid through the tube. At least two biasing members are operably connected to the roller to bias the roller against the tube, the two biasing members forming an angle.Type: ApplicationFiled: April 13, 2001Publication date: November 21, 2002Inventors: Steven R. Christenson, James Randall, Michael Thomas Hegland, James M. Haase, Mark S. Lent, William H. Monsen
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Publication number: 20020151846Abstract: An implantable drug infusion device includes a pump tube for holding a liquid to be pumped. A race is configured to support the pump tube. A roller assembly is configured to compress the tube against the race at one or more points along the path, and the roller assembly includes at least one roller and a hub. A drive assembly drives the roller assembly relative to the tube along the path so as to move the liquid through the tube. A retracting roller is operably connected to the hub and/or one or more adjacent rollers to permit retraction of the roller during installation of the pump tube between the roller and the race.Type: ApplicationFiled: April 13, 2001Publication date: October 17, 2002Inventors: Steven R. Christenson, Reginald D. Robinson, Kenneth T. Heruth, James M. Haase, Manfred K. Luedi