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- W2128345080 abstract "In end-stage renal disease (ESRD), colonic potassium (K+) secretion increases as renal K+ excretion declines. The nature of this adaptive process is poorly understood, but post-prandial increases in plasma K+ concentration may be a determining factor. In addition, even though colonic K+ secretion increases in ESRD, interdialytic hyperkalaemia is a serious problem in haemodialysis patients, which might be reduced by stimulating colonic K+ secretion still further using laxatives.Plasma K+ concentrations were measured in the fasting state, and for 180 min after the oral administration of 30 mmol of K+ to nine control subjects and 16 normokalaemic patients with ESRD (eight predialysis patients and eight patients undergoing continuous ambulatory peritoneal dialysis (CAPD)). Plasma K+ concentrations were also monitored for 180 min in fasting controls and ESRD patients who were not given the oral K+ load. To study the effect of laxatives on interdialytic hyperkalaemia, plasma K+ concentrations were measured in eight control subjects and 13 haemodialysis patients before and during 2 weeks treatment with bisacodyl (a cAMP-mediated laxative) and in five haemodialysis patients before and during 2 weeks treatment with lactulose (an osmotic laxative).Oral K+ loading caused plasma K+ concentration to rise within the normal range (3.5-5.1 mmol/l) in control subjects, while significantly higher concentrations were achieved in the predialysis patients and sustained hyperkalaemia developed in the CAPD patients. Bisacodyl treatment had no effect on plasma K+ concentrations in control subjects, but significantly decreased the mean interdialytic plasma K+ concentration (from 5.9+/-0.2 to 5.5+/-0.2 mmol/l, P<0.0005) in haemodialysis patients, whereas plasma K+ concentration did not change during lactulose treatment.Higher plasma K+ concentrations after food may help to maintain K+ homeostasis in ESRD by enhancing colonic K+ secretion. Bisacodyl may be useful for reducing interdialytic hyperkalaemia in patients undergoing haemodialysis." @default.
- W2128345080 created "2016-06-24" @default.
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- W2128345080 date "2003-02-01" @default.
- W2128345080 modified "2023-10-15" @default.
- W2128345080 title "Dietary potassium and laxatives as regulators of colonic potassium secretion in end-stage renal disease" @default.
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- W2128345080 doi "https://doi.org/10.1093/ndt/18.2.341" @default.
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