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• W2240234951 abstract "In a previous study, it was reported that hemodialysis with dialysate [K+] (KD) of 1.0 or 2.0 mmol/L caused an increase in BP shortly after completion of treatment due to arteriolar constriction. With this background, it was hypothesized that a low KD might decrease dialysis efficiency by a similar mechanism. To evaluate this hypothesis, paired observations of two consecutive 3-h treatments, with KD of 1.0 or 3.0 mmol/L, were performed in 14 stable end-stage renal disease patients. A KD of 1.0 mmol/L resulted in lower values for both urea reduction ratio and Kt/V evaluated at completion of dialysis and 1 h thereafter. Values at equilibrium were urea reduction ratio 42+/-1% versus 47+/-2% (P < 0.02), Kt/V 0.65+/-0.03 versus 0.73+/-0.03 (P < 0.02) for KD 1.0 or 3.0 mmol/L, respectively. The mechanisms responsible for the observed differences in dialysis efficiency were examined using a urea kinetics model that predicts urea sequestration caused by impaired blood flow to urea-rich tissues. For this purpose, urea rebound and its effect on Kt/V (by means of deltaKt/V, calculated as equilibrated minus single pool value) with KD 1.0 and 3.0 mmol/L were assessed. Greater urea rebound, 12.8+/-1.6% versus 8.6+/-1.4% (P < 0.001), and larger deltaKt/V, 0.12+/-0.01 versus 0.10+/-0.02 (P < 0.02), were observed with KD 1.0 mmol/L compared with 3.0 mmol/L. The theoretical model accurately predicted the deltaKt/V observed with KD 1.0 mmol/L. It is concluded that a low KD decreases dialysis efficiency. This effect is likely caused by reduced blood perfusion to nonvisceral organs, largely skeletal muscle. Conversely, hemodialysis with KD 3.0 mmol/L facilitates tissue perfusion, minimizes urea trapping in poorly perfused areas, and improves the efficiency of this treatment modality." @default.
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• W2240234951 date "1998-11-01" @default.
• W2240234951 modified "2023-09-23" @default.
• W2240234951 title "Low dialysate [K+] decreases efficiency of hemodialysis and increases urea rebound." @default.
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• W2240234951 doi "https://doi.org/10.1681/asn.v9112124" @default.
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