INFLUENCE OF HIGH AND LOW SODIUM DIALYSIS ON BLOOD-VOLUME PRESERVATION

被引:25
作者
KOUW, PM
OLTHOF, CG
GRUTEKE, P
DEVRIES, PMJM
MEIJER, JH
OE, PL
SCHNEIDER, H
DONKER, AJM
机构
[1] FREE UNIV AMSTERDAM,DEPT INTERNAL MED,1007 MC AMSTERDAM,NETHERLANDS
[2] FREE UNIV AMSTERDAM,DEPT MED PHYS,1007 MC AMSTERDAM,NETHERLANDS
关键词
HEMODIALYSIS; FLUID BALANCE; SODIUM; BLOOD VOLUME; EXTRACELLULAR VOLUME; INTRACELLULAR VOLUME;
D O I
10.1093/ndt/6.11.876
中图分类号
R3 [基础医学]; R4 [临床医学];
学科分类号
1001 ; 1002 ; 100602 ;
摘要
Haemodialysis has a profound effect on fluid balance. Since fluid is initially withdrawn from the intravascular compartment, hypovolaemia is a frequent complication. A fluid shift from the overhydrated interstitium towards the intravascular compartment can counteract hypovolaemia. However, a fast decline in extracellular osmolality may cause an increase in the intracellular volume, reducing the available amount of fluid to compensate for the hypovolaemia. To overcome this problem, the use of alternating high and low sodium dialysate is advocated. In this study six patients were studied during standard haemodialysis (HD) and during dialysis with alternating high and low sodium dialysate (HLSD). Changes in intracellular fluid volume (IFV) and extracellular fluid volume (EFV) of tissue and blood were measured by means of a non-invasive electrical conductivity method. Changes in blood volume (BV) were studied by serial erythrocyte counts. Plasma sodium concentration was determined at regular intervals. The distribution volume of sodium during the high and low sodium episodes of HLSD was calculated according to a mathematical model. HLSD led to fluctuations in plasma sodium concentration that induced changes in red cell volume, but not in IFV. Distribution of sodium was largely confined to blood. BV was better preserved during HLSD than during HD, probably due to a higher mean plasma sodium concentration. Postdialysis sodium concentration however, was not significantly different between HLSD and HD. These data suggest that the better BV preservation during HLSD results from an induced osmotic gradient across the capillary wall, rather than from an osmotic gradient across the cell membrane.
引用
收藏
页码:876 / 880
页数:5
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