Patents by Inventor Leigh Cordwin Ward
Leigh Cordwin Ward 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: 11660013Abstract: A method of performing impedance measurements on a subject. The method includes using a processing system to determine at least one impedance measurement to be performed, and at one electrode arrangement associated with the determined measurement. A representation of the arrangement is displayed so the impedance measurement can be performed once the electrodes have been arranged in accordance with the displayed representation.Type: GrantFiled: April 7, 2017Date of Patent: May 30, 2023Assignee: IMPEDIMED LIMITEDInventors: Scott Chetham, Leigh Cordwin Ward, Tim Essex
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Publication number: 20200113478Abstract: A probe for use in performing impedance measurements on a biological subject is described. The probe can include a housing configured to be held by an operator in use, a conductive contact surface for contacting the subject and a connector for connecting the contact surface to a measuring device. The probe can be configured to act as an electrode that can be moved over the subject when performing an impedance measurement procedure.Type: ApplicationFiled: June 3, 2019Publication date: April 16, 2020Inventor: Leigh Cordwin Ward
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Patent number: 10307074Abstract: A probe for use in performing impedance measurements on a subject. The probe includes a housing for being held by an operator in use, a contact surface for contacting the subject and a connector for connecting the contact surface to a measuring device.Type: GrantFiled: April 17, 2008Date of Patent: June 4, 2019Assignee: IMPEDIMED LIMITEDInventor: Leigh Cordwin Ward
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Publication number: 20170209066Abstract: A method of performing impedance measurements on a subject. The method includes using a processing system to determine at least one impedance measurement to be performed, and at one electrode arrangement associated with the determined measurement. A representation of the arrangement is displayed so the impedance measurement can be performed once the electrodes have been arranged in accordance with the displayed representation.Type: ApplicationFiled: April 7, 2017Publication date: July 27, 2017Inventors: Scott Chetham, Leigh Cordwin Ward, Tim Essex
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Patent number: 9392947Abstract: Impedance analysis can be used to measure calf muscle pump (CMP) function in a patient. This may be done by applying electrical signals via a first set of electrodes, and measuring the impedance via a second set of electrodes. The change in impedance as the patient undergoes calf extension or exercise may be measured, and the change in impedance may then be used to assess CMP function. The change in impedance may be used to determine an indicator indicative of the volume of blood ejected by the CMP.Type: GrantFiled: February 13, 2009Date of Patent: July 19, 2016Assignee: Impedimed LimitedInventor: Leigh Cordwin Ward
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Patent number: 8761870Abstract: A method of determining frequencies for use in performing impedance measurements. The method includes determining estimates for parameter values representing an impedance response for at least one subject, using the estimated parameter values to determine a design and using the design to determine frequencies for use in impedance measurements.Type: GrantFiled: May 25, 2007Date of Patent: June 24, 2014Assignee: Impedimed LimitedInventors: James Matthew McGree, Stephen Brent Duffull, Leigh Cordwin Ward, John Anthony Eccleston
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Patent number: 8099250Abstract: A method of determining parameter values used in impedance analysis of a subject. The method includes using a processing system to determine a number of impedance measurements at a corresponding number of frequencies. The impedance measurements are used to determine estimates of parameter values, with the estimates being used to determine theoretical impedance values based on the parameter value estimates. The theoretical impedance values are compared to the measured impedance values to allow a modification direction to be determined for at least one of the parameter value estimates. This is then used to modify at least one parameter value estimate, with the parameter values being determined at least in part from one or more modified parameter value estimates.Type: GrantFiled: July 27, 2006Date of Patent: January 17, 2012Assignee: Impedimed LimitedInventors: Tim Essex, Leigh Cordwin Ward
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Publication number: 20110301489Abstract: Apparatus for use in performing impedance measurements on a subject, wherein the apparatus includes a processing system for, at each of three frequencies, determining first and second parameter values for first and second impedance parameters relating to the impedance of at least one body segment of the subject, solving simultaneous equations representing a circle defined with respect to the first and second impedance parameters to thereby determine circle parameter values, the equations being solved using the first and second parameter values at each of the three frequencies, using the circle parameter values to determine a third impedance parameter value at a respective frequency and using the third impedance parameter value to determine an indicator indicative of relative fluid levels within the body segment of the subject.Type: ApplicationFiled: November 10, 2009Publication date: December 8, 2011Applicant: IMPEDIMED LIMITEDInventors: Tim Essex, Leigh Cordwin Ward, Richelle Leanne Gaw
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Publication number: 20110054343Abstract: A method of performing impedance measurements on a subject. The method includes using a processing system to determine at least one impedance measurement to be performed, and at one electrode arrangement associated with the determined measurement. A representation of the arrangement is displayed so the impedance measurement can be performed once the electrodes have been arranged in accordance with the displayed representation.Type: ApplicationFiled: June 30, 2006Publication date: March 3, 2011Applicant: Impedimed LimitedInventors: Scott Chetham, Leigh Cordwin Ward, Tim Essex
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Publication number: 20100152605Abstract: A probe for use in performing impedance measurements on a subject. The probe includes a housing for being held by an operator in use, a contact surface for contacting the subject and a connector for connecting the contact surface to a measuring device.Type: ApplicationFiled: April 17, 2008Publication date: June 17, 2010Applicant: IMPEDIMED LIMITEDInventor: Leigh Cordwin Ward
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Publication number: 20100087750Abstract: A method of determining frequencies for use in performing impedance measurements. The method includes determining estimates for parameter values representing an impedance response for at least one subject, using the estimated parameter values to determine a design and using the design to determine frequencies for use in impedance measurements.Type: ApplicationFiled: May 25, 2007Publication date: April 8, 2010Inventors: James Matthew McGree, Stephen Brent Duffull, Leigh Cordwin Ward, John Anthony Eccleston
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Publication number: 20090287102Abstract: Impedance analysis can be used to measure calf muscle pump (CMP) function in a patient. This may be done by applying electrical signals via a first set of electrodes, and measuring the impedance via a second set of electrodes. The change in impedance as the patient undergoes calf extension or exercise may be measured, and the change in impedance may then be used to assess CMP function. The change in impedance may be used to determine an indicator indicative of the volume of blood ejected by the CMP.Type: ApplicationFiled: February 13, 2009Publication date: November 19, 2009Applicant: Impedimed LimitedInventor: Leigh Cordwin Ward
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Publication number: 20080270051Abstract: A method of determining parameter values used in impedance analysis of a subject. The method includes using a processing system to determine a number of impedance measurements at a corresponding number of frequencies. The impedance measurements are used to determine estimates of parameter values, with the estimates being used to determine theoretical impedance values based on the parameter value estimates. The theoretical impedance values are compared to the measured impedance values to allow a modification direction to be determined for at least one of the parameter value estimates. This is then used to modify at least one parameter value estimate, with the parameter values being determined at least in part from one or more modified parameter value estimates.Type: ApplicationFiled: July 27, 2006Publication date: October 30, 2008Applicant: Impedimed LimitedInventors: Tim Essex, Leigh Cordwin Ward