Patents by Inventor Steven Mickelsen

Steven Mickelsen 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).

  • Patent number: 12329447
    Abstract: A catheter for tissue ablation with one or more electrodes attached to the inner surface of the catheter body facing the lumen, and one or more electrodes attached to the outer surface. The electrodes are offset from the distal end of the catheter. The material between the inner and outer electrodes is an insulator and may be for example a dielectric with a high dielectric constant. This catheter configuration generates an electric field that bends around the tip of the catheter. The field strength near the catheter tip is relatively symmetric; therefore, tissue ablation depth is relatively insensitive to catheter orientation. Embodiments may have multiple inner or outer electrodes and may switch voltage configurations across electrodes to vary the electric field direction over time, improving ablation consistency.
    Type: Grant
    Filed: July 3, 2023
    Date of Patent: June 17, 2025
    Assignee: FIELD MEDICAL, INC.
    Inventor: Steven Mickelsen
  • Patent number: 12329449
    Abstract: A system that enables safe cardiac pulsed field ablation by using multiple types of sensors on a patch to detect and cross-check that the heartbeat is in a safe phase to receive an ablation pulse. The patch may contain for example any or all of ECG electrodes, PPG sensors, accelerometers, and microphones. The patch may also contain one or more pulse return electrodes for unipolar ablation. A signal analyzer coupled to a pulse generator may receive sensor data from the patch and may analyze this data to determine the heartbeat phase. If data from different sensors are inconsistent, then pulse generation may be disabled as a safety feature. Otherwise, pulses may be enabled when the heartbeat is in a safe phase; for example, pulses may be excluded during the T wave.
    Type: Grant
    Filed: September 11, 2024
    Date of Patent: June 17, 2025
    Assignee: FIELD MEDICAL, INC.
    Inventors: Steven Mickelsen, The Quyen Nguyen, Eduardo Jimenez
  • Publication number: 20250082402
    Abstract: A system that enables safe cardiac pulsed field ablation by using multiple types of sensors on a patch to detect and cross-check that the heartbeat is in a safe phase to receive an ablation pulse. The patch may contain for example any or all of ECG electrodes, PPG sensors, accelerometers, and microphones. The patch may also contain one or more pulse return electrodes for unipolar ablation. A signal analyzer coupled to a pulse generator may receive sensor data from the patch and may analyze this data to determine the heartbeat phase. If data from different sensors are inconsistent, then pulse generation may be disabled as a safety feature. Otherwise, pulses may be enabled when the heartbeat is in a safe phase; for example, pulses may be excluded during the T wave.
    Type: Application
    Filed: September 11, 2024
    Publication date: March 13, 2025
    Applicant: FIELD MEDICAL, INC.
    Inventors: Steven MICKELSEN, The Quyen NGUYEN, Eduardo JIMENEZ
  • Publication number: 20250064370
    Abstract: A pass-through electrode device includes a tubular member including a proximal end, a distal end sized for introduction into a patient's body, a lumen extending between the proximal end and the distal end, and one or more pass-through electrodes on the distal end. Each pass-through electrode includes an outer portion on an outer wall of the tubular member, an inner portion exposed within an inner wall of the lumen, and is passive, e.g., electrically isolated and/or unconnected to other electrodes or components of the device. A system is also provided that includes an outer tubular member including one or more pass-through electrodes and a procedure device introducible through and deployable from the tubular member for performing a procedure, e.g., mapping and/or ablation. The procedure device includes one or more active electrodes that may be aligned with pass-through electrodes when the device is at least partially positioned within the outer member.
    Type: Application
    Filed: August 27, 2024
    Publication date: February 27, 2025
    Inventors: Stephen A. Leeflang, Steven Mickelsen, Blake Allan
  • Patent number: 12178503
    Abstract: A catheter for tissue ablation with one or more inner electrodes inside the lumen, one or more outer electrodes attached to the outer surface, and one or more passive conductive elements that are not connected to the power supply but that passively shape the electrical field. The electrodes may be offset from the catheter's distal end. The material between the inner and outer electrodes may be an insulator such as a dielectric with a high dielectric constant. This catheter configuration generates an electric field that bends around the tip of the catheter. The number, position, shape, and size of passive conductive elements may affect the shape of the electric field to improve ablation effectiveness and consistency. The active electrodes or passive conductors may be coupled to the inner surface of the catheter body, or they may be located inside the lumen so that fluid flows around them during ablation.
    Type: Grant
    Filed: September 4, 2024
    Date of Patent: December 31, 2024
    Assignee: FIELD MEDICAL, INC.
    Inventor: Steven Mickelsen
  • Publication number: 20240423706
    Abstract: A catheter for tissue ablation with one or more inner electrodes inside the lumen, one or more outer electrodes attached to the outer surface, and one or more passive conductive elements that are not connected to the power supply but that passively shape the electrical field. The electrodes may be offset from the catheter's distal end. The material between the inner and outer electrodes may be an insulator such as a dielectric with a high dielectric constant. This catheter configuration generates an electric field that bends around the tip of the catheter. The number, position, shape, and size of passive conductive elements may affect the shape of the electric field to improve ablation effectiveness and consistency. The active electrodes or passive conductors may be coupled to the inner surface of the catheter body, or they may be located inside the lumen so that fluid flows around them during ablation.
    Type: Application
    Filed: September 4, 2024
    Publication date: December 26, 2024
    Applicant: FIELD MEDICAL, INC.
    Inventor: Steven MICKELSEN
  • Publication number: 20240189022
    Abstract: A catheter for tissue ablation with one or more electrodes attached to the inner surface of the catheter body facing the lumen, and one or more electrodes attached to the outer surface. The electrodes are offset from the distal end of the catheter. The material between the inner and outer electrodes is an insulator and may be for example a dielectric with a high dielectric constant. This catheter configuration generates an electric field that bends around the tip of the catheter. The field strength near the catheter tip is relatively symmetric; therefore, tissue ablation depth is relatively insensitive to catheter orientation. Embodiments may have multiple inner or outer electrodes and may switch voltage configurations across electrodes to vary the electric field direction over time, improving ablation consistency.
    Type: Application
    Filed: July 3, 2023
    Publication date: June 13, 2024
    Applicant: FIELD MEDICAL, INC.
    Inventor: Steven MICKELSEN
  • Patent number: 11690671
    Abstract: A catheter for tissue ablation with one or more electrodes attached to the inner surface of the catheter body facing the lumen, and one or more electrodes attached to the outer surface. The electrodes are offset from the distal end of the catheter. The material between the inner and outer electrodes is an insulator and may be for example a dielectric with a high dielectric constant. This catheter configuration generates an electric field that bends around the tip of the catheter. The field strength near the catheter tip is relatively symmetric; therefore, tissue ablation depth is relatively insensitive to catheter orientation. Embodiments may have multiple inner or outer electrodes and may switch voltage configurations across electrodes to vary the electric field direction over time, improving ablation consistency.
    Type: Grant
    Filed: December 9, 2022
    Date of Patent: July 4, 2023
    Assignee: FIELD MEDICAL, INC.
    Inventor: Steven Mickelsen