Search Patents
  • System and method for interference and motion detection from dark periods
    Patent number: 11633116
    Abstract: Systems and methods for interference and motion detection from dark periods are provided, including analysis of a physiological signal to determine a physiological parameter of a subject, using a photoplethysmography system to monitor signals during an LED-off period to identify interference or motion artifacts in the signal.
    Type: Grant
    Filed: April 27, 2020
    Date of Patent: April 25, 2023
    Assignee: COVIDIEN LP
    Inventors: Christopher Meehan, Robert Eikel, Daniel Lisogurski, Eric Morland
  • Capacitance enhanced physiological measurements
    Patent number: 9462979
    Abstract: Systems, methods, apparatuses, and software for measuring and determining physiological parameters of a patient are presented. In one example, a physiological measurement system includes a physiological sensor system configured to detect a physiological signal representative of one or more physiological parameters associated with a patient. The measurement system also includes a capacitance system configured to apply one or more electric field signals to the patient and determine a capacitance signal. The measurement system also includes a processing system configured to reduce a noise level in the physiological signal based on at least the capacitance signal.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: October 11, 2016
    Assignee: Covidien LP
    Inventors: Daniel Lisogurski, Christopher J. Meehan, Eric Morland, Friso Schlottau
  • Pain level detection and characterization using capacitive sensors
    Patent number: 10076277
    Abstract: Systems, methods, sensors, and software for providing enhanced measurement and detection of patient pain response are provided herein. In a first example, a measurement system is provided that includes a capacitive system configured to measure a capacitance signal of tissue of the patient using a capacitive sensor proximate to the tissue of the patient. The measurement system also includes a patient monitor configured to measure an electrical signal representing brain activity of the patient. The measurement system also includes a processing system configured to determine pain metrics based at least on the capacitance signal and the electrical signal, and determine a pain response of the patient based at least on the pain metrics and pain calibration information for the patient.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: September 18, 2018
    Assignee: Covidien LP
    Inventors: Paul S. Addison, James N. Watson, Eric Morland
  • Capacitance enhanced physiological measurements
    Patent number: 10314546
    Abstract: Systems, methods, apparatuses, and software for measuring and determining physiological parameters of a patient are presented. In one example, a physiological measurement system includes an optical system configured to emit one or more optical signals into tissue of a patient, and detect the one or more optical signals after propagation through the tissue. The physiological measurement system includes a capacitance system configured to apply one or more electric field signals to a single side of the tissue to determine a capacitance signal based at least on changes in the one or more electric field signals, and a processing system configured to process at least the one or more detected optical signals and the capacitance signal to determine a physiological parameter of the patient.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: June 11, 2019
    Assignee: Covidien LP
    Inventors: Daniel Lisogurski, Christopher J. Meehan, Eric Morland, Friso Schlottau
  • Pain level detection and characterization using capacitive sensors
    Patent number: 10716503
    Abstract: Systems, methods, sensors, and software for providing enhanced measurement and detection of patient pain response are provided herein. In a first example, a measurement system is provided that includes a capacitive system configured to measure a capacitance signal of tissue of the patient using a capacitive sensor applied to the tissue of the patient. The measurement system also includes a patient monitor configured to measure an electrical signal representing brain activity of the patient using a brain activity sensor applied to the tissue of the patient. The measurement system also includes a processing system configured to determine pain metrics based at least on the capacitance signal and the electrical signal, and determine a pain response of the patient based at least on the pain metrics and pain calibration information for the patient.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: July 21, 2020
    Assignee: Covidien LP
    Inventors: Paul S. Addison, James N. Watson, Eric Morland
  • SYSTEM AND METHOD FOR INTERFERENCE AND MOTION DETECTION FROM DARK PERIODS
    Publication number: 20210330208
    Abstract: Systems and methods for interference and motion detection from dark periods are provided, including analysis of a physiological signal to determine a physiological parameter of a subject, using a photoplethysmography system to monitor signals during an LED-off period to identify interference or motion artifacts in the signal.
    Type: Application
    Filed: April 27, 2020
    Publication date: October 28, 2021
    Inventors: Christopher Meehan, Robert Eikel, Daniel Lisogurski, Eric Morland
  • CAPACITANCE ENHANCED PHYSIOLOGICAL MEASUREMENTS
    Publication number: 20150157269
    Abstract: Systems, methods, apparatuses, and software for measuring and determining physiological parameters of a patient are presented. In one example, a physiological measurement system includes a physiological sensor system configured to detect a physiological signal representative of one or more physiological parameters associated with a patient. The measurement system also includes a capacitance system configured to apply one or more electric field signals to the patient and determine a capacitance signal. The measurement system also includes a processing system configured to reduce a noise level in the physiological signal based on at least the capacitance signal.
    Type: Application
    Filed: May 9, 2014
    Publication date: June 11, 2015
    Applicant: Covidien LP
    Inventors: Daniel Lisogurski, Christopher J. Meehan, Eric Morland, Friso Schlottau
  • PAIN LEVEL DETECTION AND CHARACTERIZATION USING CAPACITIVE SENSORS
    Publication number: 20160213310
    Abstract: Systems, methods, sensors, and software for providing enhanced measurement and detection of patient pain response are provided herein. In a first example, a measurement system is provided that includes a capacitive system configured to measure a capacitance signal of tissue of the patient using a capacitive sensor proximate to the tissue of the patient. The measurement system also includes a patient monitor configured to measure an electrical signal representing brain activity of the patient. The measurement system also includes a processing system configured to determine pain metrics based at least on the capacitance signal and the electrical signal, and determine a pain response of the patient based at least on the pain metrics and pain calibration information for the patient.
    Type: Application
    Filed: January 15, 2016
    Publication date: July 28, 2016
    Inventors: Paul S. Addison, James N. Watson, Eric Morland
  • CAPACITANCE ENHANCED PHYSIOLOGICAL MEASUREMENTS
    Publication number: 20160374620
    Abstract: Systems, methods, apparatuses, and software for measuring and determining physiological parameters of a patient are presented. In one example, a physiological measurement system includes an optical system configured to emit one or more optical signals into tissue of a patient, and detect the one or more optical signals after propagation through the tissue. The physiological measurement system includes a capacitance system configured to apply one or more electric field signals to a single side of the tissue to determine a capacitance signal based at least on changes in the one or more electric field signals, and a processing system configured to process at least the one or more detected optical signals and the capacitance signal to determine a physiological parameter of the patient.
    Type: Application
    Filed: September 8, 2016
    Publication date: December 29, 2016
    Inventors: Daniel Lisogurski, Christopher J. Meehan, Eric Morland, Friso Schlottau
  • PAIN LEVEL DETECTION AND CHARACTERIZATION USING CAPACITIVE SENSORS
    Publication number: 20180368761
    Abstract: Systems, methods, sensors, and software for providing enhanced measurement and detection of patient pain response are provided herein. In a first example, a measurement system is provided that includes a capacitive system configured to measure a capacitance signal of tissue of the patient using a capacitive sensor applied to the tissue of the patient. The measurement system also includes a patient monitor configured to measure an electrical signal representing brain activity of the patient using a brain activity sensor applied to the tissue of the patient. The measurement system also includes a processing system configured to determine pain metrics based at least on the capacitance signal and the electrical signal, and determine a pain response of the patient based at least on the pain metrics and pain calibration information for the patient.
    Type: Application
    Filed: September 4, 2018
    Publication date: December 27, 2018
    Inventors: Paul S. Addison, James N. Watson, Eric Morland
  • ASYMMETRIC GAIN OF CAPACITIVE SENSORS FOR MEASURING PHYSIOLOGICAL PARAMETERS
    Publication number: 20160206245
    Abstract: Systems, methods, sensors, and software for providing enhanced measurement and correction of physiological data are provided herein. In one example, a capacitive sensor of a measurement system is positioned onto tissue of a patient. The capacitive sensor includes one or more conductive elements with associated gain properties that are positioned near optical sensor elements proximate to the tissue of the patient, the optical sensor elements positioned to measure a photoplethysmogram (PPG) for the tissue. The measurement system drives the capacitive sensor and measures capacitance signals associated with the capacitance sensor. The measurement system corrects for at least motion noise in the PPG using the capacitance signals.
    Type: Application
    Filed: January 15, 2016
    Publication date: July 21, 2016
    Inventors: Eric Morland, Christopher J. Meehan, Philip Davis, Tim Fries, Daniel Lisogurski, Clark R. Baker, JR., Rasoul Yousefi
  • ADAPTIVE MOTION CORRECTION IN PHOTOPLETHYSMOGRAPHY USING REFERENCE SIGNALS
    Publication number: 20160206247
    Abstract: Systems, methods, apparatuses, and software for providing enhanced measurement and correction of physiological data are provided herein. In a first example, a physiological measurement system is configured to obtain a measured photoplethysmogram (PPG) for a patient, and obtain a reference signal for the patient measured concurrent with the measured PPG, the reference signal including noise components related to at least motion of the patient. The physiological measurement system also is configured to determine a filtered PPG from the measured PPG using at least an adaptive filter with the reference signal to reduce noise components of the measured PPG, determine a final PPG by spectrally subtracting at least a portion of the noise components of the reference signal from the filtered PPG, and identify one or more physiological metrics of the patient based on the final PPG.
    Type: Application
    Filed: January 15, 2016
    Publication date: July 21, 2016
    Inventors: Eric Morland, Clark R. Baker, JR., Daniel Lisogurski, Rasoul Yousefi, Philip Davis, Christopher J. Meehan
  • SYSTEMS AND METHODS FOR CAPACITANCE SENSING IN MEDICAL DEVICES
    Publication number: 20150245782
    Abstract: Various methods and systems for the use of capacitance sensors within medical devices configured for patient monitoring are provided. The capacitance sensors are configured to measure a change in capacitance resulting from a material (e.g., human tissue, water, gel, cloth, etc.) placed near (e.g., close proximity to) the medical device and/or resulting from a material making physical contact with the medical device. In certain embodiments, the capacitance sensor may be utilized to detect whether one or more portions of the medical sensor are securely applied to the patient's tissue (e.g., sensor “on”) and/or may be utilized to detect whether one or more portions of the medical sensor fail to maintain secure contact with the patient's tissue (e.g., sensor “off”). Further, in certain embodiments, the capacitance sensor may be utilized to distinguish between one or more types of materials (e.g., human tissue, water-based materials, etc.).
    Type: Application
    Filed: December 19, 2014
    Publication date: September 3, 2015
    Inventors: Eric Morland, Daniel Lisogurski, Christopher Meehan, Sarah Hayman, Darshan Iyer, Friso Schlottau
  • Memory system using complementary delay elements to reduce rambus module timing skew
    Patent number: 6584576
    Abstract: An improvement in a Rambus memory system of the type used in personal computers. On a module level, each RIMM (Rambus Interface Memory Module) includes a positive and a negative module time delay element on the CTM (clock to master) clock line. On a system level, where a motherboard has a plurality of RIMMs coupled to a chipset (i.e. memory controller), a positive or negative system time delay element is placed on the CFM (clock from master line). By virtue of the module and system time delay elements, the clock timing can be adjusted from the data timing, whereby the overall TQ (timing skew between clock and data) can be advantageously reduced to allow more RIMMs to be placed on the same motherboard. What is more, the module and system delays also improve timing margins on the standard Rambus channel so as to increase the robustness of a conventional Rambus system.
    Type: Grant
    Filed: November 12, 1999
    Date of Patent: June 24, 2003
    Assignee: Kingston Technology Corporation
    Inventor: Ramon S. Co
  • Oxy-carbon arc cutting electrode
    Patent number: 6730873
    Abstract: A consumable, oxy-carbon arc cutting electrode to be used in an oxygen exothermic torch for cutting both ferrous and non-ferrous metals. The cutting electrode includes a hollow, outer copper clad steel tube. A plurality of copper clad carbon fuel rods run through and are surrounded by the outer tube. The plurality of fuel rods are aligned in side-by-side engagement with one another and positioned circumferentially around the interior of the outer tube so that a passageway extends longitudinally through the outer tube in coaxial alignment with the circumferential arrangement of fuel rods. Pure oxygen gas is blown from the torch down the passageway through the center of the outer tube and along the fuel rods. By virtue of the foregoing, the oxy-carbon arc cutting electrode of this invention is capable of sustaining a higher combustion temperature, having a longer life, and generating lower levels of noise relative to conventional exothermic and air-carbon-arc cutting rods.
    Type: Grant
    Filed: July 5, 2002
    Date of Patent: May 4, 2004
    Inventor: Eric Wolfe
  • Method and mold for making non-metallic fiber reinforced parts
    Patent number: 7704067
    Abstract: A mold and a method for molding high strength, non-metallic fiber reinforced composite parts having a variety of (e.g., cylindrical) shapes that are lighter in weight than similar parts manufactured from metal. An unmolded non-metallic pre-form having long continuous fibers is placed around a mandrel, and a segmented, adjustable diameter compression ring is disposed in surrounding engagement with the pre-form at an upper position within an inwardly tapered compression ring support. The compression ring is formed from a plurality of loose compression ring segments that are initially spaced circumferentially from one another at the upper position of the compression ring support. The mandrel and the pre-form are first heated and then located in a press.
    Type: Grant
    Filed: February 7, 2006
    Date of Patent: April 27, 2010
    Assignee: Tiodize Company, Inc.
    Inventors: Thomas R. Adams, Gary R. Wittman
  • Fire service water supply manifold
    Patent number: D663015
    Type: Grant
    Filed: April 7, 2011
    Date of Patent: July 3, 2012
    Inventor: Arthur A. Hendey, Sr.
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