Determining dialysis treatment effectiveness

摘要

A method performed on a dialysis machine includes receiving a first value that represents a pre-dialysis body weight of a patient and receiving a second value that represents a volume of liquid (V) inside a body of the patient. The method also includes administering dialysis to the patient, calculating an instantaneous body weight (W) of the patient based at least in part on the first value, determining a length of time (t) for which the dialysis was administered to the patient, determining a dialyzer clearance (K) associated with the dialysis, and calculating, based at least in part on the length of time, the instantaneous body weight, the volume, and the dialyzer clearance, a urea reduction ratio (URR) associated with the dialysis.

主权项

1. A method comprising:
providing a hemodialysis machine comprising tubes to transfer blood between a patient and the machine, a display screen, and one or more controllers operable for: receiving a first value that represents a pre-dialysis body weight of a patient; receiving a second value that represents a volume of liquid (V) inside a body of the patient; administering a dialysis treatment to the patient; while the dialysis treatment is being administered to the patient:
calculating an instantaneous body weight (W) of the patient based at least in part on the first value;determining a length of time (t) for which the dialysis treatment was administered to the patient; determining a dialyzer clearance (K) associated with the dialysis treatment; calculating, based at least in part on the length of time, the instantaneous body weight, the volume of liquid, and the dialyzer clearance, a urea reduction ratio (URR) associated with the dialysis treatment; providing a user interface for display on the display screen of the hemodialysis machine comprising: a set of controls that enable a user to control whether or not either of a URR value and a Kt/V value are presented on the display, and enabling the user to toggle between presentation of a Kt/V value and presentation of a URR value on the display, comprising a toggle control to enable toggling between a display of a URR value and a Kt/V value, and radio controls specifying whether the user interface displays one or both of Kt/V values and URR values,
providing, for display on the display screen of the hemodialysis machine, a visual representation of the progress of the dialysis treatment that includes at least one graph having an x-axis and a y-axis,wherein the x-axis represents a time value, and the y-axis represents at least one of the Kt/V value and the URR value,wherein the y-axis represents the Kt/V value if a Kt/V option is chosen on the controls, and the y-axis represents URR if the URR option is chosen on the controls, andwherein the graph includes at least one component representing either of the correlation of time to Kt/V and the correlation of time to URR; andcontinuing administration of dialysis until a delivered URR value tracked by the user interface meets or exceeds a target URR value.