alexa Urea kinetics and when to commence dialysis.
Medicine

Medicine

Internal Medicine: Open Access

Author(s): Tattersall J, Greenwood R, Farrington K

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Abstract Blood urea and serum creatinine levels are important factors in deciding when to start dialysis. Recently, in the assessment of dialysis adequacy, emphasis has shifted from reliance on these parameters to use of kinetic methods. We therefore applied urea kinetic modelling (UKM) to 63 consecutive chronic renal failure (CRF) patients at the time dialysis commenced and compared the results to those obtained after 6 months of dialysis treatment. Mean normalised urea clearance (daily KT/V) at the commencement of dialysis (KTi/V) was 0.15 +/- 0.05, a level indicative of underdialysis in regularly dialysed patients. After 6 months, mean daily KT/V was 0.35 +/- 0.12 in patients subsequently established on CAPD, and 0.49 +/- 0.08 in those subsequently haemodialysed (both p < 0.001 compared to mean KTi/V). Serum creatinine levels on commencing dialysis were similar to those after 6 months treatment by either mode. Mean age (p < 0.01) and co-morbidity index (p < 0.05) were higher, and mean KTi/V lower (p < 0.05) in the 6 patients who died during a mean follow-up period of 10 +/- 4.5 months than in survivors. Hospitalisation rates during follow-up (excluding admissions for access surgery and training) correlated with age (r = 0.332, p < 0.01), co-morbidity index (r = 0.351, p < 0.01) and KTi/V (r = -0.302, p < 0.05). Blood urea and serum creatinine levels on commencing dialysis were the same in those who died and in survivors and did not correlate with hospitalisation rates. Diabetics started dialysis with a similar mean KTi/V to non-diabetics but with a lower mean serum creatinine (p < 0.005).(ABSTRACT TRUNCATED AT 250 WORDS)
This article was published in Am J Nephrol and referenced in Internal Medicine: Open Access

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