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1. (WO2017180326) WAVE-BASED PATIENT LINE BLOCKAGE DETECTION

Pub. No.:    WO/2017/180326    International Application No.:    PCT/US2017/024673
Publication Date: Fri Oct 20 01:59:59 CEST 2017 International Filing Date: Thu Mar 30 01:59:59 CEST 2017
IPC: A61M 1/28
Applicants: FRESENIUS MEDICAL CARE HOLDINGS, INC.
Inventors: CRAWFORD, William Scott
OHLINE, Matthew Robert
Title: WAVE-BASED PATIENT LINE BLOCKAGE DETECTION
Abstract:
A dialysis machine (e.g., a peritoneal dialysis (PD) machine) can include a pressure sensor (151A, 151B) mounted at a proximal end of a patient line (130) that provides PD solution to a patient through a catheter. During treatment, an occlusion (1008) can occur at different locations in the patient line and/or the catheter. Elastic waves may be generated at a pump that introduces (e.g., for fill cycles) or withdraws (e.g., for drain cycles) the solution into/out of the patient line. For example, when the solution is introduced or withdrawn suddenly, elastic waves travel distally down the patient line until they encounter the occlusion, and are then reflected back (e.g., toward the pressure sensor).