Safety device for a blood treatment machine and a method of increasing the safety of a blood treatment machine
Patent 6767333 Issued on July 27, 2004. Estimated Expiration Date: 
August 28, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 28, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesUltrafiltration control system Automatic ultrafiltration control system Apparatus and method for plasma separation Artificial kidney with device for filtering dialysis liquid Liquid filtering and supply system controlling recirculation responsive to pressure difference across filter Hemo(dia)filtration apparatus and filtrate flow regulator Patent #: 5660722 InventorsAssigneeApplicationNo. 09649213 filed on 08/28/2000US Classes:604/6.09, Filter means604/4.01, BLOOD DRAWN AND REPLACED OR TREATED AND RETURNED TO BODY604/6.11, Pumping means210/646HemodialysisExaminersPrimary: Sykes, Angela D.Assistant: Deak, Leslie R. Attorney, Agent or FirmForeign Patent References
International ClassesA61M 3700C02F 144 AbstractA device and method for increasing the safety of an extracorporeal blood treatment machine are based on monitoring transmembrane pressure. The transmembrane pressure measured by a measuring device during the treatment is compared with an upper limit transmembrane pressure L1 and a lower limit transmembrane pressure L2 which define a monitoring window. If the transmembrane pressure is outside this monitoring window, an alarm is triggered by an alarm device. The monitoring window is shifted as a function of the ultrafiltration rate. To determine the window limits, the transmembrane pressure is established after a change in the ultrafiltration rate is calculated. Thereafter, the window limits are determined on the basis of the expected transmembrane pressure.Other References
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