Patent ID: 11865243
Assignee: NXSTAGE MEDICAL, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A blood treatment system, comprising:
a machine comprising one or more pumps;
a blood circuit in engagement with the one or more pumps and having an inlet line for conveying blood to a patient and an outlet line for conveying the blood from the patient;
a treatment device configured to treat the blood and having a first port and a second port, the first port of the treatment device fluidly connected to the inlet line and the second port of the treatment device fluidly connected to the outlet line;
at least one of the inlet line or the outlet line having at least two pressure sensors positioned in it and a flow restriction located between said at least two pressure sensors, wherein all of the at least two pressure sensors are disposed upstream or downstream from a pump, among the one or more pumps, said pump being disposed in a same one of the inlet and outlet lines as the at least two pressure sensors; and
a controller configured to control the one or more pumps to convey blood to and from the patient, the controller further configured to use readings of the at least two pressure sensors to determine a change over time in a pressure drop across the flow restriction and to perform an action responsive to the change in the pressure drop, the action comprising at least one of:
generating a notification,
adjusting a blood flow rate in the blood circuit,
outputting an estimation of a condition of the machine or the patient, or
outputting data responsive to said estimation.