Abstract
Single needle dialysis (SND) is inferior to double needle dialysis (DND) in its efficiency because it is always accompanied by ineffective flow recirculation. We previously reported that volume reservoir (VR) positioned in venous (V) circuit can increase the efficiency of SND. A special device was developed to return blood patients immedietly as passible by gasseous pressure when a ‘V’ circuit pressure is reached to its upper limit. This device consists of four parts: gas container, volume reservoir, programmable controller with solenoid valves and connecting tube. It previously took longer time to return blood to the body because the balloon of VR is deflated by restitution. But, it allowed shorter time to deflate the balloon in our new device. As a result, time in ‘A’ phase become longer, and the efficiency of SND is increased. There was no rupture of balloon within five or more hours in endulance test in mongrel dogs.
