Abstract:
BACKGROUND:The hemodialysis adequacy is one of the most important issues influencing the survival of patients on maintenance hemodialysis (HD). Assessment of measuring the delivered dialysis dose using clearance x time/volume (Kt/V) index requires multiple blood sampling. New methods for assessment of dialysis dose based on ionic dialysance (ID) have been suggested. Online conductivity monitoring (using sodium flux as a surrogate for urea) allows the repeated noninvasive measurement of Kt/V on each HD treatment. In this study we have compared this method with the standard method of estimating Kt/V. METHODS:We studied 24 established HD patients over a 4 week time period. Patients were dialyzed using Fresenius 4008S dialysis monitors, equipped with modules to measure ID. Data were manually collected and analyzed using the appropriate statistical software. Urea removal (UR) was measured once a week by a two-pool calculation, estimating an eKt/V. RESULTS:The Kt/V measured by ID highly correlated with the one derived from the measurement of the UR (r=0.8959, p< 0.0001). The ID underestimated UR by the mean of 6%. The ID varied greatly within individual patients with a median of 1.29 +/- 0.22. If the eKt/V > or = 1.2 is considered adequate, 33% of the patients would have been inadequately dialyzed. The mean HD duration to achieve an adequate dialysis was 4 hours and 47 minutes with high interpatient variability. CONCLUSION:The ID seems to be an easily obtained measure of the delivered dialysis dose, correlating well with standard UR method. Substantial individual variations imply that repeated measures (ideally for all treatments) are necessary to obtain a real answer to the mean treatment dose being delivered to the patients.
journal_name
Ren Failjournal_title
Renal failureauthors
Racki S,Zaputović L,Maleta I,Grzetić M,Mavrić Z,Devcić B,Vujicić Bdoi
10.1080/08860220500200262subject
Has Abstractpub_date
2005-01-01 00:00:00pages
601-4issue
5eissn
0886-022Xissn
1525-6049journal_volume
27pub_type
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