Method and a device for determining the dry weight of a patient with kidney failure
AssigneeFresenius Medical Care Deutschland GmbH
InventorPaul Chamney
Life of this patent
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Abstract
A system and method for determining the dry weight wgtdry(t) of a patient at a time t by determining the extracellular water volume ECV(t) and the weight Wgt(t) of the patient at time t and by deriving the dry weight wgtdry(t) of the patient from an intersection of a function derived from the determined ECV(t) and Wgt(t) values with a previously established extracellular water volume (ECV) against dry weight (wgtdry(t)) reference relation representing healthy subjects. To obtain more accurate results it is also proposed to take into account a compartmental mass correction Δm(t). The invention also relates to a device for deriving the dry weight wgtdry(t).
Claims25
A method for determining the dry weight Wgtdry(t) of a patient at a time t comprising the steps of:
- determining the extracellular water volume ECV(t) of the patient at the time t,
- determining the weight Wgt(t) of the patient at the time t,
- deriving the dry weight Wgtdry(t) of the patient from an intersection of a function derived from the determined ECV(t) and Wgt(t) values with a previously established extracellular water volume (ECV) against dry weight (Wgtdry) reference relation representing healthy subjects.
Dependencies are inferred from the claim text.