US 12,121,369 B2
Chest-based physiological monitor
Matthew Banet, San Diego, CA (US); Kenneth Robert Hunt, Vista, CA (US); Marshal Singh Dhillon, San Diego, CA (US); and Susan Meeks Pede, Encinitas, 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 Apr. 30, 2021, as Appl. No. 17/245,389.
Application 15/935,576 is a division of application No. 14/852,347, filed on Sep. 11, 2015, granted, now 9,924,902, issued on Mar. 27, 2018.
Application 17/245,389 is a continuation of application No. 15/935,576, filed on Mar. 26, 2018, granted, now 10,993,663.
Claims priority of provisional application 62/049,279, filed on Sep. 11, 2014.
Prior Publication US 2021/0315524 A1, Oct. 14, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 5/00 (2006.01); A61B 5/0205 (2006.01); A61B 5/021 (2006.01); A61B 5/029 (2006.01); A61B 5/0531 (2021.01); A61B 5/256 (2021.01); A61B 5/28 (2021.01)
CPC A61B 5/6822 (2013.01) [A61B 5/0205 (2013.01); A61B 5/021 (2013.01); A61B 5/029 (2013.01); A61B 5/0531 (2013.01); A61B 5/256 (2021.01); A61B 5/28 (2021.01); A61B 5/6823 (2013.01); A61B 5/6831 (2013.01); A61B 5/7225 (2013.01); A61B 5/746 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A sensor for measuring respiratory rate (RR) from a patient, the sensor comprising:
a sensing portion having a flexible housing;
an elongated securement member extending from the sensing portion and configured to position the sensing portion against the sternal portion of the patient's chest for measurements made by the sensor,
at least one pair of electrode contact points disposed within the flexible housing, with each pair of electrode contact points comprising a current-injecting electrode contact point and a voltage-sensing electrode contact point;
an analog electrocardiogram (ECG) circuit disposed within the flexible housing and in electrical contact with said at least one pair of electrode contact points, the ECG circuit configured to generate an analog ECG waveform based on sensed voltage;
an analog impedance circuit disposed within the flexible housing and in electrical contact with said at least one pair of electrode contact points, the impedance circuit being configured to generate an analog impedance waveform based on sensed voltage;
a digital processing system disposed within the flexible housing and comprising a microprocessor and an analog-to-digital converter, the digital processing system being configured to: 1) digitize the analog ECG waveform to generate a digital ECG waveform, and 2) digitize the analog impedance waveform to generate a digital impedance waveform; and
a respiration-monitoring system disposed within the flexible housing and configured with a first algorithm, which first algorithm collectively processes the digital impedance and digital ECG waveforms to determine a value of RR.