US 12,390,571 B2
Needle dislodgement detection systems and methods
Dipen N. Sinha, Bay Shore, NY (US); Robert Schaefer, Bay Shore, NY (US); Curtis Osterhoudt, Hesperus, CO (US); Peter G. Espina, Bay Shore, NY (US); Martin J. Crnkovich, Walnut Creek, CA (US); Fei Wang, Concord, CA (US); Steve M. Bowman, Essex, MA (US); and Martin Urban, Thuengersheim (DE)
Assigned to AWE Technologies LLC, Bay Shore, NY (US); Fresenius Medical Care Deutschland GmbH, Bad Homburg (DE); and Fresenius Medical Care Holdings, Inc., Waltham, MA (US)
Filed by Fresenius Medical Care Holdings, Inc., Waltham, MA (US); AWE Technologies LLC, Bay Shore, NY (US); and Fresenius Medical Care Deutschland GmbH, Bad Homburg (DE)
Filed on Oct. 24, 2024, as Appl. No. 18/925,370.
Claims priority of provisional application 63/593,653, filed on Oct. 27, 2023.
Prior Publication US 2025/0135082 A1, May 1, 2025
Int. Cl. A61M 1/36 (2006.01); A61M 1/16 (2006.01)
CPC A61M 1/3656 (2014.02) [A61M 1/1601 (2014.02)] 16 Claims
OG exemplary drawing
 
1. A method of monitoring an extracorporeal blood circuit of a patient and identifying a needle dislodgement, the method comprising:
identifying a potential needle dislodgement event based on changes in pressure of the extracorporeal blood circuit;
searching for a heart rate of a patient by analyzing an optical backscatter signal from an optical sensor attached to the extracorporeal blood circuit; and
verifying the potential needle dislodgement event is a needle dislodgement based on the absence of the heart rate.