초록 ▼

Methods and apparatus for increasing the accuracy of ultrafiltration in a dialysis machine and decreasing the time required for dialysis. The machine inclused a substantially non-compliant tank for mixing and storing a batch of dialsyate. In a preferred form, the tank is a hollow vessel made from a

Methods and apparatus for increasing the accuracy of ultrafiltration in a dialysis machine and decreasing the time required for dialysis. The machine inclused a substantially non-compliant tank for mixing and storing a batch of dialsyate. In a preferred form, the tank is a hollow vessel made from a lightweight and chemically inert material, such as polypropylene, reinforced on its exterior. The machine further includes an ultrafiltration pump for pumping fluid from an extracorporeal circuit to an ultrafiltration tank commensurate with the removal of water from the patient. The pump is calibrated with the volume of fluid in the tank. The reduction in the time to conduct hemodialysis of the patient is achieved by introducing the patient's blood into the arterial line and conducting the blood to the blood pump, measuring the pressure of the blood in the arterial line, increasing the pump rate of the blood pump, and in the event that the pressure measured in the arterial line drops below a predetermined threshold value, slowing the pump rate of the blood pump.

대표청구항 ▼

[ We claim:] [1.] A method for improving the control of ultrafiltration of a dialysis patient, comprising the steps of:filling a substantially non-compliant tank with a batch preparation of dialysate, said tank comprising a cylindrical vessel made from polypropylene reinforced with fibers wound abou

[ We claim:] [1.] A method for improving the control of ultrafiltration of a dialysis patient, comprising the steps of:filling a substantially non-compliant tank with a batch preparation of dialysate, said tank comprising a cylindrical vessel made from polypropylene reinforced with fibers wound about the exterior surface of said tank;pumping the dialysate through a dialysate circuit to a dialyzer;conducting dialysis of the patient's blood at said dialyzer;pumping fluid from said dialysate circuit into an ultrafiltration tank; whereby expansion of said substantially non-compliant tank is minimized, permitting accurate measurement of the fluids removed from the patient in said ultrafiltration tank.