A Simple Method for Clinical Application of Push/Pull Hemodiafiltration

Pulse Push/Pull Hemodialysis in a Canine Renal Failure Model

“…A similar but simpler method, the so-called push/pull HDF method which relies on repeated cycles of ultrafiltration and backfiltration [10][11][12][13][14][15] , was introduced to increase convective mass transfer, but this system requires an additional device, i.e. a double compartment piston pump, to regulate instantaneous blood and dialysate pressures [16] .…”

Pulse Push/Pull Hemodialysis: Convective Renal Replacement Therapy

“…However, disposable bags and separate bidirectional peristaltic pumps make this unit complicated and increase treatment costs. Instead, a double-chamber cylinder pump was devised with two independent chambers and a reciprocal piston; that is, each chamber is connected to either dialysate or the blood stream (Tsuruta et al, 1994), as seen in Fig. 4.…”

Push/Pull Hemodiafiltration: Technical Aspects and Clinical Effectiveness

“…With the original push/pull machine [7], the push/pull volume of the dialy sate is usually 200 ml as compared with 16.7 ml with the more recently developed machines [1,2], With each alternate filtration and backfiltration. the blood efflux from the hemodiafilter decreases or in creases, respectively, when either the original or the more recently developed machines are used.…”

“…Tsuruta et al [1] solved the former problem by devel oping a new push/pull machine incorporating a bidirec tionally discharging piston pump with a discharge volume of 16.7 ml in either direction (Andoh's machine). With this machine, as shown in figure 5, the bidirectionally dis charging piston pump pulls dialysate from the dialysate 4 Maeda/Shinzato Push/Pull Hémodiafiltration removal tubing and simultaneously pushes air to the venous chamber; next, it pushes the dialysate back into the dialysate removal tubing and simultaneously pulls air from the venous chamber.…”

“…For the past few years, this method has been undergoing contin uous improvement by various researchers [1][2][3], This review presents the mechanical and functional characteristics of the original and recently developed push/pull machines and discusses the clinical effective ness of push/pull hémodiafiltration performed using these machines.…”