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AssigneeFresenius Medical Care Deutschland GmbH
InventorsMatthias Krämer, Carsten Müller, Christian Johner
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To increase the safety of an extracorporeal blood treatment machine which has control of the ultrafiltration rate as a function of the blood volume of the patient, the ultrafiltration rate UFR(t) during the treatment is monitored in a safety device. The safety device has a computer unit for determining an upper limit for the ultrafiltration rate UFRlim from the predetermined total ultrafiltrate volume UFVtot and the predetermined treatment time UFT. The safety device also has a monitoring unit with which the ultrafiltration rate is limited to the upper limit determined by the computer unit so that any risk to the patient is prevented even in the case of faulty blood volume control.
A safety device for an extracorporeal blood treatment machine having a blood inlet line leading from a patient to an inlet of a first chamber of an exchange unit divided by a semipermeable membrane into the first chamber and a second chamber and a blood outlet line leading from an outlet of the first chamber to the patient, the treatment machine including an ultrafiltration device for withdrawing a predetermined total ultrafiltrate volume from the second chamber at an ultrafiltration rate during a predetermined treatment time, a measurement unit for determining a blood volume or a measurement quantity of the patient correlating with the blood volume, and a control unit for controlling the ultrafiltration rate as a function of the blood volume, the safety device comprising:
A method of increasing the safety of an extracorporeal blood treatment machine having a blood inlet line leading from a patient to the inlet of a first chamber of an exchange unit divided by a semipermeable membrane into the first chamber and a second chamber, and a blood outlet line leading from an outlet of the first chamber to the patient, the treatment machine including an ultrafiltration device for withdrawing a predetermined total ultrafiltrate volume from the second chamber of the exchange unit at an ultrafiltration rate during a predetermined treatment time, a measurement unit for determining a blood volume or a measurement quantity of the patient which correlates with the blood volume, and a control unit for controlling an ultrafiltration rate as a function of the blood volume, the method comprising the steps of:
An extracorporeal blood treatment machine comprising:
A method for an extracorporeal blood treatment for a patient comprising the steps of:
Dependencies are inferred from the claim text.