Fresenius Medical Care Holdings, Inc.

Awe Technologies LLC

Fresenius Medical Care Deutschland Gmbh

Robert Schaefer

Martin Joseph Crnkovich

Dipen N Sinha

Peter G Espina

Fei Wang

Curtis Osterhoudt

Martin Urban

Gareth T Schaefer

Scott Macintosh

Steve M Bowman

This disclosure teaches a system and method for monitoring an extracorporeal blood circuit of a patient and identifying a needle dislodgement. The method includes 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 or by analyzing a pressure signal representative of the pressure in the extracorporeal blood circuit, and verifying the potential needle dislodgement event is a needle dislodgement based on the absence of the heart rate.

Needle dislodgement detection systems and methods

In one aspect, a method and system for detecting a change in fluid dynamics of a fluid flowing through an extra-corporeal circuit is disclosed, which includes establishing an acoustic wave resonance across a transverse dimension of at least a portion of a line associated with the extra-corporeal circuit through which the fluid flows, monitoring a phase signal of the resonant acoustic wave, and identifying occurrence of a change in fluid dynamics of the flowing fluid when the observed phase signal of the resonant acoustic wave indicates a deviation from the expected fluid flow signature. The change in fluid dynamics can be used to indicate a venous needle dislodgement event.

System and method for detecting venous needle dislodgement

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Bay Shore, NY, United States of America

Robert Schaefer