US 12,343,131 B2
Body-worn sensor for characterizing patients with heart failure
Matthew Banet, San Diego, CA (US); Susan Meeks Pede, Encinitas, CA (US); Marshal Singh Dhillon, San Diego, CA (US); and Kenneth Robert Hunt, Vista, CA (US)
Assigned to BAXTER INTERNATIONAL INC., Deerfield, IL (US); and BAXTER HEALTHCARE SA, Glattpark (CH)
Filed by Baxter International Inc., Deerfield, IL (US); and Baxter Healthcare SA, Glattpark (CH)
Filed on Jun. 7, 2023, as Appl. No. 18/330,862.
Application 16/436,631 is a division of application No. 14/145,229, filed on Dec. 31, 2013, granted, now 10,314,509, issued on Jun. 11, 2019.
Application 18/330,862 is a continuation of application No. 16/436,631, filed on Jun. 10, 2019, granted, now 11,712,170.
Claims priority of provisional application 61/747,842, filed on Dec. 31, 2012.
Prior Publication US 2023/0380713 A1, Nov. 30, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 5/053 (2021.01); A61B 5/00 (2006.01); A61B 5/02 (2006.01); A61B 5/0531 (2021.01); A61B 5/282 (2021.01)
CPC A61B 5/053 (2013.01) [A61B 5/0531 (2013.01); A61B 5/282 (2021.01); A61B 5/6822 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A sensor worn on a patient for measuring fluid and blood pressure in the patient, comprising:
a first electrode holder and a second electrode holder configured to adhere to the patient, wherein a first electrode is disposed within the first electrode holder and a second electrode is disposed within the second electrode holder, and wherein each of the first and second electrodes is removable from its respective electrode holder,
an impedance-measuring system, comprised by a first circuit board and in electrical contact with at least one of the first electrode and the second electrode and worn on the patient, the impedance-measuring system configured to receive the electrical signals from the first and second electrodes and process them to determine a first impedance signal comprising a baseline that varies with fluid in the patient, and a second impedance signal comprising heartbeat-induced pulses measured directly from the patient; and,
a data-processing system, comprised by a second circuit board and in electrical contact with the impedance-measuring system and worn on the patient, the data-processing system operating a computer algorithm configured to process the first impedance signal to determine fluid in the patient, the second impedance signal to determine a transit time, and the transit time to determine blood pressure.