Patents by Inventor Darrel Francis
Darrel Francis 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: 20230019503Abstract: Apparatus for monitoring activation in a heart comprises a probe 101, a plurality of electrodes 102 supported on the probe and extending over a detection area of the probe, the detection area being arranged to contact a detection region of the heart. Each of the electrodes 102 is arranged to detect electrical potential at a respective position in the heart during movement of a series of activation wave fronts across the detection region. A processor is arranged to analyse the detected electrical potentials to identify a propagation direction of at least one of the wave fronts, and to generate an output indicative of that direction.Type: ApplicationFiled: May 16, 2022Publication date: January 19, 2023Inventors: Prapa Kanagaratnam, Nick Linton, Darrel Francis
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Publication number: 20220273181Abstract: A device and a method thereof for determining a hemodynamic state of an individual from a magnitude of a perfusion signal or a signal which is a measure of a volume of blood in the thoracic cavity of the individual, wherein the control device is configured to receive a first signal and a heart rate signal, divide the first signal into frames, wherein a frame length is determined from an oscillation period of the heart rate signal, and determine a magnitude of the first signal from at least two frames, so as to obtain a more reliable magnitude of the first signal.Type: ApplicationFiled: May 20, 2022Publication date: September 1, 2022Inventors: Darrel Francis, Matthew Shun-Shin, Daniel Keene, Zachary Whinnett
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Patent number: 11350828Abstract: A device and a method thereof for determining a hemodynamic state of an individual from a magnitude of a perfusion signal or a signal which is a measure of a volume of blood in the thoracic cavity of the individual, wherein the control device is configured to receive a first signal and a heart rate signal, divide the first signal into frames, wherein a frame length is determined from an oscillation period of the heart rate signal, and determine a magnitude of the first signal from at least two frames, so as to obtain a more reliable magnitude of the first signal.Type: GrantFiled: March 24, 2017Date of Patent: June 7, 2022Assignee: Imperial College of Science, Technology & MedicineInventors: Darrel Francis, Matthew Shun-Shin, Daniel Keene, Zachary Whinnett
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Patent number: 11331033Abstract: Apparatus for monitoring activation in a heart comprises a probe 101, a plurality of electrodes 102 supported on the probe and extending over a detection area of the probe, the detection area being arranged to contact a detection region of the heart. Each of the electrodes 102 is arranged to detect electrical potential at a respective position in the heart during movement of a series of activation wave fronts across the detection region. A processor is arranged to analyse the detected electrical potentials to identify a propagation direction of at least one of the wave fronts, and to generate an output indicative of that direction.Type: GrantFiled: April 25, 2018Date of Patent: May 17, 2022Assignee: Imperial College of Science, Technology and MedicineInventors: Prapa Kanagaratnam, Nick Linton, Darrel Francis
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Patent number: 10791951Abstract: Apparatus for monitoring activation in a heart comprises a probe (100), a plurality of electrodes (101, 102) supported on the probe and each arranged to detect electrical potential at a respective position in the heart during a series of activations, and processing means (104) arranged to analyse the detected electrical potentials to identify a propagation direction of the activation, and to generate an output indicative of that direction.Type: GrantFiled: April 22, 2014Date of Patent: October 6, 2020Assignee: IMPERIAL COLLEGE INNOVATIONS LIMITEDInventors: Darrel Francis, Prapa Kanagaratnam
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Publication number: 20200037906Abstract: Apparatus for monitoring activation in a heart comprises a probe 101, a plurality of electrodes 102 supported on the probe and extending over a detection area of the probe, the detection area being arranged to contact a detection region of the heart. Each of the electrodes 102 is arranged to detect electrical potential at a respective position in the heart during movement of a series of activation wave fronts across the detection region. A processor is arranged to analyse the detected electrical potentials to identify a propagation direction of at least one of the wave fronts, and to generate an output indicative of that direction.Type: ApplicationFiled: April 25, 2018Publication date: February 6, 2020Inventors: Prapa Kanagaratnam, Nick Linton, Darrel Francis
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Publication number: 20190099088Abstract: A device and a method thereof for determining a haemodynamic state of an individual from a magnitude of a perfusion signal or a signal which is a measure of a volume of blood in the thoracic cavity of the individual, wherein the control device is configured to receive a first signal and a heart rate signal, divide the first signal into frames, wherein a frame length is determined from an oscillation period of the heart rate signal, and determine a magnitude of the first signal from at least two frames, so as to obtain a more reliable magnitude of the first signal.Type: ApplicationFiled: March 24, 2017Publication date: April 4, 2019Inventors: Zachary Whinnett, Darrel Francis, Matthew Shun-Shin, Daniel Keene
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Patent number: 9399138Abstract: A pacemaker programming apparatus for programming a pacemaker in an individual. The apparatus comprises means for determining the sensed-paced difference of the pacemaker in the individual: first testing means for determining the optimum AV delay while the pacemaker is atrially pacing at a raised at a heart rate; and calculation means for calculating the optimum AV delay determined by the first testing means minus the sensed-paced difference.Type: GrantFiled: April 20, 2007Date of Patent: July 26, 2016Assignee: Imperial Innovations LimitedInventors: Zachary Whinnett, Darrel Francis
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Patent number: 9383236Abstract: Systems and methods are disclosed for indicating bottoming contact between an inner wall of a fluid carrying conduit and a distal tip process measurement probe. A process device, such as a fluid flow meter, has a process measurement probe configured for insertion into the fluid carrying conduit. An insertion mechanism is coupled to the process measurement probe and configured to apply force to insert the process measurement probe into the fluid carrying conduit. A bottoming indicator is configured to provide an indication of proper bottoming of the distal tip of the process measurement probe against the inner wall of the fluid carrying conduit as a function of an insertion related force or pressure.Type: GrantFiled: September 18, 2014Date of Patent: July 5, 2016Assignee: Dieterich Standard, Inc.Inventors: Alan Blaine Kempner, Nathaniel Kirk Kenyon, Darrel Francis Coleman
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Publication number: 20160084688Abstract: Systems and methods are disclosed for indicating bottoming contact between an inner wall of a fluid carrying conduit and a distal tip process measurement probe. A process device, such as a fluid flow meter, has a process measurement probe configured for insertion into the fluid carrying conduit. An insertion mechanism is coupled to the process measurement probe and configured to apply force to insert the process measurement probe into the fluid carrying conduit. A bottoming indicator is configured to provide an indication of proper bottoming of the distal tip of the process measurement probe against the inner wall of the fluid carrying conduit as a function of an insertion related force or pressure.Type: ApplicationFiled: September 18, 2014Publication date: March 24, 2016Inventors: Alan Blaine Kempner, Nathaniel Kirk Kenyon, Darrel Francis Coleman
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Publication number: 20160073913Abstract: Apparatus for monitoring activation in a heart comprises a probe (100), a plurality of electrodes (101, 102) supported on the probe and each arranged to detect electrical potential at a respective position in the heart during a series of activations, and processing means (104) arranged to analyse the detected electrical potentials to identify a propagation direction of the activation, and to generate an output indicative of that direction.Type: ApplicationFiled: April 22, 2014Publication date: March 17, 2016Applicant: IMPERIAL INNOVATIONS LIMITEDInventors: Darrel Francis, Prapa Kanagaratnam
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Publication number: 20150327838Abstract: Various methods for automatically processing an ultrasound image for echocardiography are disclosed in which the regions of interest in the ultrasound image are identified by determining velocity vectors for tissue movement in the image. A novel construction of ultrasound probe is also disclosed.Type: ApplicationFiled: November 15, 2013Publication date: November 19, 2015Inventors: Darrel Francis, Keith Willson, Niti Mahesh Dhutia, Massoud Zolgharni, Graham Cole
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Publication number: 20100030295Abstract: A pacemaker programming apparatus for programming a pacemaker in an individual. The apparatus comprises means for determining the sensed-paced difference of the pacemaker in the individual: first testing means for determining the optimum AV delay while the pacemaker is atrially pacing at a raised at a heart rate; and calculation means for calculating the optimum AV delay determined by the first testing means minus the sensed-paced difference.Type: ApplicationFiled: April 20, 2007Publication date: February 4, 2010Applicant: IMPERIAL INNOVATIONS LIMITEDInventors: Zachary Whinnett, Darrel Francis
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Publication number: 20090299430Abstract: A device and method for improving the stability of a ventilation pattern of a patient (1) uses a sensor (4) for sensing a parameter which reflects a level of lung gas in a patient, such as oxygen or carbon dioxide. The output signal of the sensor is received by a processor (3) which assesses the level of lung gas of the patient and activates means (18,20) for increasing the lung gas level of the patient beyond what it would otherwise have been without treatment in response to a decreasing level or a predicted decreasing level of the lung gas. Thus the device can be used to retard a decrease in said lung gas level, thereby reducing oscillations in the respiration.Type: ApplicationFiled: April 20, 2007Publication date: December 3, 2009Applicant: IMPERIAL INNOVATIONS LIMITEDInventors: Ceri Davies, Keith Willson, Charlotte Manisty, Darrel Francis