Patents by Inventor David R. Fischell

David R. Fischell 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).

  • Publication number: 20160120587
    Abstract: An intravascular catheter for peri-vascular and/or peri-urethral tissue ablation includes multiple needles advanced through supported guide tubes which expand with open ends around a central axis to engage the interior surface of the wall of the renal artery or other vessel of a human body allowing the injection an ablative fluid for ablating tissue, and/or nerve fibers in the outer layer or deep to the outer layer of the vessel, or in prostatic tissue. The system also includes means to limit and/or adjust the depth of penetration of the ablative fluid into and beyond the tissue of the vessel wall. The preferred embodiment of the catheter includes structures which provide radial and lateral support to the guide tubes so that the guide tubes open uniformly and maintain their position against the interior surface of the vessel wall as the sharpened injection needles are advanced to penetrate into the vessel wall.
    Type: Application
    Filed: November 4, 2015
    Publication date: May 5, 2016
    Inventors: David R. Fischell, Tim A. Fischell, Robert Ryan Ragland, Darrin James Kent, Andy Edward Denison, Eric Thomas Johnson, Jeff Alan Burke, Christopher Scott Hayden
  • Patent number: 9320850
    Abstract: An intravascular catheter for peri-vascular or peri-urethral tissue ablation includes multiple needles advanced through supported guide tubes which expand around a central axis to engage the interior surface of the wall of the renal artery or other vessel of a human body allowing the injection an ablative fluid for ablating tissue, or such as nerve fibers in the outer layer or deep to the outer layer of the vessel, or in prostatic tissue. The system may also controls the depth of penetration of the ablative fluid into and beyond the tissue of the vessel wall. The catheter may also include structures which provide radial and/or lateral support to the guide tubes so that the guide tubes expand uniformly and maintain their position against the interior surface of the vessel wall as the sharpened injection needles are advanced to penetrate into the vessel wall.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: April 26, 2016
    Assignee: Ablative Solutions, Inc.
    Inventors: David R. Fischell, Tim A. Fischell, Robert Ryan Ragland, Darrin James Kent, Andy Edward Denison, Eric Thomas Johnson, Jeff Alan Burke, Christopher Scott Hayden, Robert E. Fischell
  • Patent number: 9301795
    Abstract: An intravascular catheter for peri-vascular or peri-urethral tissue ablation includes multiple needles advanced through guide tubes which may be supported by an expandable balloon. The guide tubes expand with open ends around a central axis to engage the interior surface of the wall of the renal artery or other vessel of a human body allowing the injection an ablative fluid for ablating tissue, or nerve fibers in the outer layer or deep to the outer layer of the vessel, or in prostatic tissue. The diameter of the inflated balloon is less than the inside diameter of the vessel, allowing perfusion across the inflated balloon and guide tubes.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: April 5, 2016
    Assignee: Ablative Solutions, Inc.
    Inventors: David R. Fischell, Tim A. Fischell, Darrin James Kent, Andy Edward Denison
  • Publication number: 20160066816
    Abstract: An interactive implantable medical device system includes an implantable medical device and a network-enabled external device capable of bi-directional communication and interaction with the implantable medical device. The external device is programmed to interact with other similarly-enabled devices. The system facilitates improved patient care by eliminating unnecessary geographic limitations on implantable medical device interrogation and programming, and by allowing patients, physicians, and other users to access medical records, history, and information and to receive status and care-related alerts and messages anywhere there is access to a communications network.
    Type: Application
    Filed: November 10, 2015
    Publication date: March 10, 2016
    Inventors: Benjamin D. PLESS, David R. FISCHELL, Barbara GIBB, Lisa GUZZO, Adrian R.M. UPTON
  • Patent number: 9278196
    Abstract: A vascular nerve ablation (denervation) system includes a multiplicity of expandable needles which open around a central axis to engage the wall of a blood vessel allowing the injection of a cytotoxic or neurotoxic solution for ablating conducting tissue in and near the vessel wall of a renal artery or pulmonary vein. The expandable needles are formed of self-expanding materials and include structures which limit the distance of penetration of the injection needles into the tissue of the wall of the blood vessel.
    Type: Grant
    Filed: August 24, 2011
    Date of Patent: March 8, 2016
    Assignee: Ablative Solutions, Inc.
    Inventors: David R. Fischell, Tim A. Fischell
  • Publication number: 20160058489
    Abstract: An intravascular catheter for peri-vascular and/or peri-urethral tissue ablation includes multiple needles advanced through supported guide tubes which expand around a central axis to engage the interior surface of the wall of the renal artery or other vessel of a human body allowing the injection an ablative fluid for ablating tissue, and/or nerve fibers in the outer layer or deep to the outer layer of the vessel, or in prostatic tissue. The system may also include a means to limit and/or adjust the depth of penetration of the ablative fluid into and beyond the tissue of the vessel wall. The catheter may also include structures which provide radial and/or lateral support to the guide tubes so that the guide tubes expand uniformly and maintain their position against the interior surface of the vessel wall as the sharpened injection needles are advanced to penetrate into the vessel wall.
    Type: Application
    Filed: August 31, 2015
    Publication date: March 3, 2016
    Inventors: David R. Fischell, Tim A. Fischell, Robert Ryan Ragland, Darrin James Kent, Andy Edward Denison, Eric Thomas Johnson, Jeff Alan Burke, Christopher Scott Hayden, Robert E. Fischell
  • Publication number: 20160045257
    Abstract: Systems and methods are disclosed to identify and treat hypertensive patients most likely to benefit from a renal denervation procedure. The method can include identifying one or more signals that patient's hypertension is sympathetically driven; and performing a renal denervation procedure to denervate the sympathetic nerves located near at least one of the patient's renal arteries.
    Type: Application
    Filed: August 14, 2014
    Publication date: February 18, 2016
    Inventors: Tim A. Fischell, David R. Fischell, Vartan Ghazarossian
  • Patent number: 9254211
    Abstract: A thin-walled guide wire tube is fixedly and sealably attached to both a proximal section and a distal section of a balloon angioplasty catheter. A stent is co-axially mounted onto the inflatable balloon of the balloon angioplasty catheter. Because the guide wire tube forms an inner liner for the balloon angioplasty catheter, the fluid inflation lumen of the catheter is sealed so the inflation liquid that pressurizes the balloon will not leak as it would be if there were no “inner liner” and the balloon angioplasty catheter were attached to the guide wire itself. By not having a traditional inner shaft through which a conventional guide wire slides, the deflated balloon on which the stent is mounted can have a reduced diameter.
    Type: Grant
    Filed: October 6, 2005
    Date of Patent: February 9, 2016
    Assignee: Cordis Corporation
    Inventors: David R. Fischell, Robert E. Fischell, Tim A. Fischell, Scott J. S. Fischell
  • Patent number: 9254360
    Abstract: An intravascular catheter for peri-vascular and/or peri-urethral tissue ablation includes multiple needles advanced through supported guide tubes which expand around a central axis to engage the interior surface of the wall of the renal artery or other vessel of a human body allowing the injection an ablative fluid for ablating tissue, and/or nerve fibers in the outer layer or deep to the outer layer of the vessel, or in prostatic tissue. The system may also limit and/or adjust the depth of penetration of the ablative fluid into and beyond the tissue of the vessel wall. The catheter may also include structures which provide radial and/or lateral support to the guide tubes so that the guide tubes expand uniformly and maintain their position against the interior surface of the vessel wall as the sharpened injection needles are advanced to penetrate into the vessel wall.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: February 9, 2016
    Assignee: Ablative Solutions, Inc.
    Inventors: David R. Fischell, Tim A. Fischell, Robert Ryan Ragland, Darrin James Kent, Andy Edward Denison, Eric Thomas Johnson, Jeff Alan Burke, Christopher Scott Hayden, Robert E. Fischell
  • Patent number: 9241817
    Abstract: A balloon disposed near a distal end of the catheter tubing and moving between deflated and inflated states, and proximal and distal stent retention bands concentrically arranged around respective proximal and distal end portions of the balloon. The proximal stent retention band has a distal end located within 2 mm of the proximal end of a stent coaxially received by the balloon and the distal stent retention band has a largest diameter within 2 mm of the distal end of the stent received by the balloon.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: January 26, 2016
    Assignee: Svelte Medical Systems, Inc.
    Inventors: Robert E. Fischell, David R. Fischell
  • Patent number: 9237925
    Abstract: At the present time, physicians often treat patients with atrial fibrillation (AF) using radiofrequency (RF) catheter systems to ablate conducting tissue in the wall of the Left Atrium of the heart around the ostium of the pulmonary veins. These systems are expensive and take time consuming to use. The present invention circular ablation system CAS includes a multiplicity of expandable needles that can be expanded around a central axis and positioned to inject a fluid like ethanol to ablate conductive tissue in a ring around the ostium of a pulmonary vein quickly and without the need for expensive capital equipment. The expansion of the needles is accomplished by self-expanding or balloon expandable structures. The invention includes centering means so that the needles will be situated in a pattern surrounding the outside of the ostium of a vein. Also included are members that limit the distance of penetration of the needles into the wall of the left atrium, or the aortic wall.
    Type: Grant
    Filed: August 2, 2011
    Date of Patent: January 19, 2016
    Assignee: Ablative Solutions, Inc.
    Inventors: David R. Fischell, Tim A. Fischell
  • Patent number: 9232903
    Abstract: An interactive implantable medical device system includes an implantable medical device and a network-enabled external device capable of bi-directional communication and interaction with the implantable medical device. The external device is programmed to interact with other similarly-enabled devices. The system facilitates improved patient care by eliminating unnecessary geographic limitations on implantable medical device interrogation and programming, and by allowing patients, physicians, and other users to access medical records, history, and information and to receive status and care-related alerts and messages anywhere there is access to a communications network.
    Type: Grant
    Filed: July 7, 2014
    Date of Patent: January 12, 2016
    Assignee: NeuroPace, Inc.
    Inventors: Benjamin D Pless, David R. Fischell, Barbara Gibb, Lisa Guzzo, Adrian R. M. Upton
  • Publication number: 20150343156
    Abstract: A catheter-based/intravascular fluid injection system with application to renal denervation includes a multiplicity of needles which expand open around a central axis to engage the wall of a blood vessel, or the wall of the left atrium, allowing the injection of a cytotoxic and/or neurotoxic solution for ablating conducting tissue, or nerve fibers around the ostium of the pulmonary vein, or circumferentially in or just beyond the outer layer of the renal artery. The expandable delivery system includes expandable components that facilitate positioning of a multiplicity of injection needles against the inside wall of a blood vessel from where they can be advanced. The system also includes means to limit and/or adjust the depth of penetration of the ablative fluid into the tissue of the wall of the targeted blood vessel.
    Type: Application
    Filed: June 12, 2015
    Publication date: December 3, 2015
    Inventors: David R. Fischell, Tim A. Fischell
  • Publication number: 20150335384
    Abstract: At the present time, physicians often treat patients with atrial fibrillation (AF) using radiofrequency (RF) catheter systems to ablate conducting tissue in the wall of the Left Atrium of the heart around the ostium of the pulmonary veins. These systems are expensive and take time consuming to use. The present invention circular ablation system CAS includes a multiplicity of expandable needles that can be expanded around a central axis and positioned to inject a fluid like ethanol to ablate conductive tissue in a ring around the ostium of a pulmonary vein quickly and without the need for expensive capital equipment. The expansion of the needles is accomplished by self-expanding or balloon expandable structures. The invention includes centering means so that the needles will be situated in a pattern surrounding the outside of the ostium of a vein. Also included are members that limit the distance of penetration of the needles into the wall of the left atrium.
    Type: Application
    Filed: July 31, 2015
    Publication date: November 26, 2015
    Inventors: David R. Fischell, Tim A. Fischell
  • Patent number: 9179962
    Abstract: An intravascular catheter for peri-vascular or peri-urethral tissue ablation includes multiple needles advanced through supported guide tubes which expand with open ends around a central axis to engage the interior surface of the wall of the renal artery or other vessel of a human body allowing the injection an ablative fluid for ablating tissue, such as nerve fibers in the outer layer or deep to the outer layer of the vessel, or in prostatic tissue. The system also controls the depth of penetration of the ablative fluid into and beyond the tissue of the vessel wall. The preferred embodiment of the catheter includes structures which provide radial and lateral support to the guide tubes so that the guide tubes open uniformly and maintain their position against the interior surface of the vessel wall as the sharpened injection needles are advanced to penetrate into the vessel wall.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: November 10, 2015
    Assignee: Ablative Solutions, Inc.
    Inventors: David R. Fischell, Tim A. Fischell, Robert Ryan Ragland, Darrin James Kent, Andy Edward Denison, Eric Thomas Johnson, Jeff Alan Burke, Christopher Scott Hayden
  • Patent number: 9174057
    Abstract: A device for detecting cardiac ischemia is disclosed. The device includes a processor that is configured to distinguish between two different heart beats types such as ventricularly paced beats and supraventricular beats. The processor collects separate reference data for a first one of the beat types indicative of the normal values of a cardiac feature. The processor performs an ischemia test to beats of the first type by first checking whether valid reference data exists for that beat type. If so, the ischemia test is based on this reference data. If no valid reference data exists for the firs beat type, the processor applies an ischemia test that is not based on reference data for the first beat type.
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: November 3, 2015
    Assignee: Angel Medical Systems, Inc.
    Inventors: David R. Fischell, Michael Sasha John, Bruce Hopenfeld
  • Publication number: 20150289774
    Abstract: A system for detecting acute ischemia includes at least two sensors configured for obtaining electrical signals from a patient's heart, analog-to-digital converter circuitry for digitizing the signal to produce data segments, and a processor configured to analyze data segments to determine if they represent an abnormal heart rhythm. Certain types of abnormal rhythm segments are also checked for acute ischemia. If enough of the abnormal heart rhythm segments manifest acute ischemia, a first type of alarm event is generated. If persistent abnormal heart rhythm segments do not manifest acute ischemia, a second type of alarm event is generated.
    Type: Application
    Filed: June 25, 2015
    Publication date: October 15, 2015
    Inventors: DAVID R. FISCHELL, TIM A. FISCHELL, JONATHAN HARWOOD, ROBERT E. FISCHELL
  • Patent number: 9131983
    Abstract: At the present time, physicians often treat patients with atrial fibrillation (AF) using radiofrequency (RF) catheter systems to ablate conducting tissue in the wall of the Left Atrium of the heart around the ostium of the pulmonary veins. These systems are expensive and take time consuming to use. The present invention circular ablation system CAS includes a multiplicity of expandable needles that can be expanded around a central axis and positioned to inject a fluid like ethanol to ablate conductive tissue in a ring around the ostium of a pulmonary vein quickly and without the need for expensive capital equipment. The expansion of the needles is accomplished by self-expanding or balloon expandable structures. The invention includes centering means so that the needles will be situated in a pattern surrounding the outside of the ostium of a vein. Also included are members that limit the distance of penetration of the needles into the wall of the left atrium.
    Type: Grant
    Filed: October 18, 2013
    Date of Patent: September 15, 2015
    Assignee: Ablative Solutions, Inc.
    Inventors: David R. Fischell, Tim A. Fischell
  • Publication number: 20150245863
    Abstract: An intravascular catheter for peri-vascular and/or peri-urethral tissue ablation includes multiple needles advanced through supported guide tubes which expand around a central axis to engage the interior surface of the wall of the renal artery or other vessel of a human body allowing the injection an ablative fluid for ablating tissue, and/or nerve fibers in the outer layer or deep to the outer layer of the vessel. A method of treating hypertension involves injecting an ablative fluid such as ethanol deep into zones in the wall of the renal artery such that the zones of fluid merge to form a circumferential ablation ring at a depth which ablates sympathetic nerves while minimizing injury to interior layers of the vessel wall.
    Type: Application
    Filed: May 14, 2015
    Publication date: September 3, 2015
    Inventors: David R. Fischell, Tim A. Fischell, Robert Ryan Ragland, Darrin James Kent, Andy Edward Denison, Eric Thomas Johnson, Jeff Alan Burke, Christopher Scott Hayden, Robert E. Fischell
  • Publication number: 20150245936
    Abstract: A stent delivery catheter including a catheter tubing defining a lumen therethrough, a balloon disposed near a distal end of the catheter tubing and moving between deflated and inflated states, and proximal and distal balloon control bands concentrically arranged around respective proximal and distal end portions of the balloon. The proximal balloon control band has a proximal end located proximally of a proximal end of the balloon and a distal end located adjacent a proximal end of a received unexpanded stent. The distal balloon control band has a proximal end located adjacent a distal end of the received unexpanded stent and a distal end located distally of a distal end of the balloon. The balloon control bands each have a diametric cross-section larger than the balloon in an uninflated state and the unexpanded stent received over the balloon to impede axial movement of the unexpanded stent off of the balloon.
    Type: Application
    Filed: May 18, 2015
    Publication date: September 3, 2015
    Applicant: Svelte Medical Systems, Inc.
    Inventors: Robert E. Fischell, David R. Fischell, Fernando DiCaprio