US 12,408,855 B2
Biopotential measurement system and apparatus
Shrenik Deliwala, Andover, MA (US)
Assigned to Analog Devices, Inc., Wilmington, MA (US)
Filed by Analog Devices, Inc., Wilmington, MA (US)
Filed on Dec. 6, 2021, as Appl. No. 17/542,626.
Application 17/542,626 is a division of application No. 15/988,378, filed on May 24, 2018, granted, now 11,191,469.
Claims priority of provisional application 62/511,709, filed on May 26, 2017.
Prior Publication US 2022/0087588 A1, Mar. 24, 2022
Int. Cl. A61B 5/25 (2021.01); A61B 5/00 (2006.01); H03F 1/10 (2006.01); H03F 1/26 (2006.01); H03F 3/00 (2006.01); H03F 3/08 (2006.01); H03F 3/45 (2006.01); A61B 5/053 (2021.01); A61B 5/369 (2021.01); A61B 5/389 (2021.01)
CPC A61B 5/25 (2021.01) [A61B 5/6801 (2013.01); H03F 1/10 (2013.01); H03F 1/26 (2013.01); H03F 3/005 (2013.01); H03F 3/087 (2013.01); H03F 3/45475 (2013.01); A61B 5/053 (2013.01); A61B 5/369 (2021.01); A61B 5/389 (2021.01); A61B 5/6823 (2013.01); A61B 5/7203 (2013.01); A61B 2562/0209 (2013.01); H03F 2200/261 (2013.01); H03F 2203/45551 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for detecting lead-off detection while measuring a biopotential of a patient comprising, the method comprising:
providing a first lead electrode, second lead electrode, and third lead electrode, the first, second and third lead electrodes configured to make direct electrical contact with a skin of the patient;
electrically connecting a proximal end of a first high resistance resistor to the first lead electrode;
electrically connecting a proximal end of a second high resistance resistor to the second lead electrode;
applying a current to the third lead electrode;
DC coupling both electrical pathways from the first and second lead electrodes to a current amplifier;
measuring an average current in a given time interval from an output of the current amplifier by charging a capacitor disposed between distal ends of the first and second high resistance resistors; and
determining lead-off detection of at least one of the first, second and third lead electrodes at least based on a measured output of the current amplifier.