公开(公告)号：WO2022006193A1

公开(公告)日：2022-01-06

申请号：PCT/US2021/039744

申请日：2021-06-30

Applicant: FRESENIUS MEDICAL CARE HOLDINGS, INC. ,  AWE TECHNOLOGIES LLC

Inventor： SCHAEFER, Robert ,  SCHAEFER, Gareth T. ,  MACINTOSH, Scott ,  SINHA, Dipen N. ,  ESPINA, Peter G. ,  CRNKOVICH, Martin J.

IPC: G01S5/18 ,  A61M1/1601 ,  A61M1/1605 ,  A61M1/3626 ,  A61M1/3656 ,  A61M2205/13 ,  A61M2205/15 ,  A61M2205/3334 ,  A61M2205/3344 ,  A61M2205/3375 ,  A61M2230/06 ,  G01S15/88

Abstract: 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.