摘要:
A novel single needle hemodiafiltration apparatus and a novel single needle hemodiafiltration method for purifying blood with excellent removal performance via extracorporeal circulation with a single needle type are provided. The single needle hemodiafiltration apparatus includes a blood supply system for supplying blood, a dialysis fluid supply system for supplying a dialysis fluid and a system for controlling a movement of a fluid between the two supply systems, and a filtration/back-filtration liquid supply unit provided in the dialysis fluid supply system is controlled in conjunction with a blood pump provided in the blood supply system so that blood is removed from the body synchronously with the filtration and returned to the body synchronously with the back-filtration, thereby enabling extracorporeal circulation with the single needle. At a time of filtration, substances are removed by diffusion and ultrafiltration. At a time of recirculation in the blood circuit, substances are removed by diffusion. A high removal efficiency that cannot be achieved by the conventional single needle blood dialysis can be achieved by appropriately selecting the stroke volume per cycle, the number and order of the filtration/back-filtration/blank phases and the blood flow rate in each phase.
摘要:
Provided is a hemodialyzer in which deterioration in membrane performance of a hollow fiber with time can be grasped accurately during dialysis and the performance can be recovered quickly and positively. The hemodialyzer, constituted by connecting an artery side blood circuit (2) having a blood pump (7) to the artery side of a dialyzer (1), connecting a vein side blood circuit (3) to the vein side of the dialyzer (1), and connecting a dialysate supply line (4) and a dialysate discharge line (5), respectively, to the side face of the dialyzer (1), is provided with a detector (15) for determining the pressure in the blood circuit, and a detector (16) for determining the pressure in the dialysate line, in which transmembrane pressure is calculated based on the determined pressures, and reverse filtering is performed by the dialyzer (1) when the transmembrane pressure exceeds a predetermined level. Reverse filtering is performed by flushing operation and clogging of pores of the dialyzing membrane in the dialyzer (1) is eliminated thus recovering performance of the dialyzer (1).
摘要:
A single needle hemodiafiltration apparatus is provided. The single needle hemodiafiltration apparatus includes circuits for blood supply from a patient and blood return to a patient, a dialysis fluid supply system for supplying a dialysis fluid, and a system for controlling the blood flow and dialysis fluid flow in a separation device which is equipped to perform filtration and back-filtration operations. A controller is provided that controls, in a series of coordinated operations, the flow of blood from the patient into the separation device, the flow of filtration fluid and back filtration fluid, and the return of blood to the patient.
摘要:
According to the present invention, there is provided a hemodiafiltration apparatus capable of easily and efficiently removing medium to large molecule solutes at a low cost. Provided is a hemodialysis apparatus which uses a hemodialyzer accommodating a hollow yarn membrane in hemodiafiltration to cause a dialysis fluid to flow from a dialysis fluid circuit side to a blood circuit side by forceful back-filtration via the hemodialyzer, and to cause a fluid in the blood circuit to reflux to a dialysis fluid circuit side by filtration via the hemodialyzer, the hemodialysis apparatus being characterized in that a flux operation of the fluid from the dialysis fluid side to the blood circuit side by the back-filtration, and a reflux operation of the fluid from the blood circuit side to the dialysis fluid circuit side by the filtration are repeated intermittently and for at least a plurality of times.
摘要:
Provided is a hemodialysis apparatus which can fundamentally solve a problem in that air is trapped in a mesh disposed in a vein side chamber during priming. A hemodialysis apparatus includes control means that conducts, in the stated order: (A) a process in which a blood pump reversely rotates at the same speed as a reverse filtration speed made by third fluid feeding means, and a dialysate flows in a flow passage extending from a connection portion between a hemodialyzer and an artery side blood line to a vein side chamber through the joint portion in a loop formed by connecting the artery side blood line and the vein side blood line, to thereby prime the flow passage and the hemodialyzer, and (B) a process in which a reverse rotation speed of the blood pump is made lower than the reverse filtration speed made by the third fluid feeding means, and the dialysate of a flow rate corresponding to a speed obtained by subtracting the reverse rotation speed of the blood pump from the reverse filtration speed made by the third fluid feeding means flows in a flow passage extending from a connection portion between the hemodialyzer and the vein side blood line to the vein side chamber, which is a remaining flow passage of the loop, to thereby prime the flow passage and the hemodialyzer.
摘要:
According to the present invention, there is provided a hemodiafiltration apparatus capable of easily and efficiently removing medium to large molecule solutes at a low cost. Provided is a hemodialysis apparatus which uses a hemodialyzer accommodating a hollow yarn membrane in hemodiafiltration to cause a dialysis fluid to flow from a dialysis fluid circuit side to a blood circuit side by forceful back-filtration via the hemodialyzer, and to cause a fluid in the blood circuit to reflux to a dialysis fluid circuit side by filtration via the hemodialyzer, the hemodialysis apparatus being characterized in that a flux operation of the fluid from the dialysis fluid side to the blood circuit side by the back-filtration, and a reflux operation of the fluid from the blood circuit side to the dialysis fluid circuit side by the filtration are repeated intermittently and for at least a plurality of times.
摘要:
The present invention provides a dialysis coupler assembly comprising a pair of rubber-like elastic tubular couplers, and a pair of joint members for joining the couplers together. Each of the couplers includes an inner channel 14 allowing a connector associated with a medical device to be fitted therein, and a smooth surface 15, 16 perpendicular to the longitudinal axis of the coupler. The couplers are adapted to be joined together through the joint members in such manner that the smooth surfaces are in liquid-tight contact with one another. Each of the joint members is adapted to be attached slidably and rotatably onto corresponding one of the couplers, the joint members having first and second engagement portions, respectively. The first and second engagement portions are disposed opposed to one another and adapted to cooperatively engage the joint members with one another so as to allow the smooth surfaces to be brought into liquid-tight contact with one another.
摘要:
An automatic reinfusing system which involves no contamination or medical errors or any other operational problems and allows easy and simple operation, without imposing any burden on the medical worker. The automatic reinfusing system includes a hemodialysis circuit, wherein a solution replenishing line has a replenishing solution supply source and an opening and closing arrangement for opening and closing the solution replenishing line, a dialysate supply line and a dialysate discharge line for perfusing to the dialyzer, with a solution feeding arrangement being respectively provided for the dialysate supply line and the dialysate discharge line. At least one filtering and reverse-filtering third solution feeding arrangement capable of normal and reverse rotation and allowing flow rate control serves to perform filtering and reverse filtering on one of the dialysate supply line and the dialysate discharge line in parallel with the solution feeding arrangement. A water-slowing and solution-discharging arrangement, with the blood-feeding means and the filtering and reverse-filtering third solution feeding arrangement are caused to communicate with each other by an interlocking control for controlling, in an interlocked manner, the blood feeding arrangement, the solution feeding arrangement, the opening and closing arrangement for opening and closing the solution replenishing line, and the opening and closing arrangement between the artery connection end the solution replenishing line branching part.
摘要:
An automatic priming method in which an arterial-side chamber is maintained in a normal position during priming, as in a case of dialysis treatment, and in which forward and backward rotations of a blood pump are employed, and a speed of rotation, in particular, backward rotation, is adjusted to be low, so that air or the like is reliably prevented from entering a dialyzer. The priming method for use in a blood purification circuit in which priming is conducted by supplying physiological saline into a circulation circuit formed by connecting an arterial blood circuit with a venous blood circuit includes filling the venous blood circuit with a priming solution (physiological saline), discharging the priming solution for cleaning the arterial blood circuit, conducting a treatment in a direction opposite to the overflow step, which may be followed by a forward direction re-circulation step, and re-circulating in a forward direction.
摘要:
The present invention provides an automatic priming method by which priming is conducted while keeping, in the automatic priming, an arterial-side chamber in a normal position as in a case of dialysis treatment, and in which forward and backward rotations of a blood pump are employed, and a speed of rotation, in particular, backward rotation is adjusted to be low so that air or the like is reliably prevented from entering a dialyzer. The priming method is characterized by including, in a blood purification circuit in which priming is conducted by supplying physiological saline into a circulation circuit formed by connecting an arterial blood circuit (L1) with a venous blood circuit (L2), (1) an early injection step of filling the venous blood circuit with a priming solution (physiological saline), (2) an overflow step of discharging the priming solution for cleaning the arterial blood circuit, (3) a reverse direction re-circulation step of conducting a treatment in a direction opposite to the overflow step, which may be followed by a forward direction re-circulation step, and (4) a forward direction re-circulation step.