US 12,484,861 B2
Determining arterial pressures
Paul S. Addison, Edinburgh (GB)
Assigned to Covidien LP, Mansfield, MA (US)
Filed by Covidien LP, Mansfield, MA (US)
Filed on Nov. 8, 2018, as Appl. No. 16/184,638.
Prior Publication US 2020/0146636 A1, May 14, 2020
Int. Cl. A61B 5/00 (2006.01); A61B 5/0205 (2006.01); A61B 5/021 (2006.01); A61B 5/026 (2006.01); A61B 5/1455 (2006.01)
CPC A61B 5/7278 (2013.01) [A61B 5/021 (2013.01); A61B 5/026 (2013.01); A61B 5/14553 (2013.01); A61B 5/742 (2013.01)] 18 Claims
OG exemplary drawing
 
14. A method for medical monitoring, comprising:
generating, from a blood pressure sensor, a blood pressure signal comprising fluctuating blood pressure values of a patient through cardiac cycles of the patient;
transmitting the blood pressure signal to an autoregulation monitor;
discarding, by the autoregulation monitor, portions of the blood pressure signal comprising one or more of an anomaly, noise, or error;
selecting a subset of a remaining portion of the blood pressure signal, the subset being contained within a single cardiac cycle;
determining, from the selected subset, a characteristic arterial pressure (CAP) value representative of arterial pressure;
repeating the discarding, selecting, and determining for subsequent cardiac cycles of the patient to produce a CAP curve;
correlating the CAP curve with an oxygen saturation signal of the patient to identify an autoregulation status of the patient; and
displaying a graph of blood pressure over time, the graph comprising an intact autoregulation zone and an impaired autoregulation zone and a blood pressure line overlaid on the graph.