Abstract
Single needle method (S. N.) which is being used frequently for the trouble of blood access and emergency dialysis, presents bad dialytic efficiency compared with double needle method (W. N.). In na in vitro test it was ccnfirmed that S. N. presented a lack of blood flow averaging 6.8% compared with W. N. at QB: 150ml/min 19G catheter and a decrease in rate of solute elimination of 6 to 10% for Urea-N (19G single lumen catheter). A lads of blood flow caused by the beats involving the clamp of the arteriovenous circuit and an intermixture at flow in and out are thought to be responsible for these phenomena, in view of which we made an examination to obtain stable blood flow and dialytic efficiency. In S. N. method, total blood flow required for a single dialysis is calculated and the total blood flow thus colculated is pre-set into the electronic counter incorporated in the blood pump. Dialysis is terminated at a point when target counts are attained. With this method, dialytic time required averaged 5.5h and rate of elimination averaged 58.3 for S-U. N. and 55.6 for S-creatinine, respectively (QB: 150mi/min 19G catheter).
