Ultrafiltration 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
ApplicationNo. 09649213 filed on 08/28/2000
US Classes:604/6.09, Filter means604/4.01, BLOOD DRAWN AND REPLACED OR TREATED AND RETURNED TO BODY604/6.11, Pumping means210/646Hemodialysis
ExaminersPrimary: Sykes, Angela D.
Assistant: Deak, Leslie R.
Attorney, Agent or Firm
Foreign Patent References
International ClassesA61M 3700
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.