[Ionic dialysance to control the dose of dialysis. One year experience].
The Diascan equipment (Hospal) measures ionic dialysane which it derives the K and the Kt. If we divide the Kt obtained with Diascan between the Kt/V obtained by a simplified formula, it result a value of V for every patient. Entering this V in the Diascan software we can obtain a Kt/V (Diascan Kt/V), similar in theory to the simplified Kt/V. In the year 2002 we have controlled the delivered dialysis in our unit with the Diascan Kt/V. The aim of the present study was to study the agreement between de Diascan Kt/V and the Lowrie Kt/V. During the year 2002, 63 patients have been dialyzed in monitors with Diascan equipment. We calculated the V of each patient by dividing the Kt Diascan between the Lowrie Kt/V in the same dialysis session. The mea of the two consecutive measurements was considered the V value. Throughout the year 2002, 7 agreement studies were realized. The inter-method variability was assessed by the relative difference (absolute difference Diascan Kt/V-Lowrie Kt/V, divided by the average of both tests). A good agreement was considered when the relative difference was equal or lower than 10%. In the 7 agreement studies realized, the mean of the relative difference oscilled between 5.2 and 6.6%, and the percentage of patients with a relative difference equal or lower than 10% oscilled between 83 and 91%. During a month, the Diascan Kt/V was controlled in all dialysis sessions in 41 patients (554 sessions in total). Failure in the lecture of Kt/V Diascan was observed in 41 sessions (7%). A Diascan Kt/V greater than 1 (the minimum delivered dialysis considered in our unit) was obtained in 93% of the valid sessions. 38 of 41 patients had a mean monthly Diascan Kt/V greater than 1. The coefficient of variability of any patient oscilled between 2.1 and 12.4% (mean 5.1%). Diascan Kt/V is good procedure for the monitoring the delivered dialysis without blood sampling or any additional costs.
Teruel
J L
JL
Servicio de Nefrología Hospital Ramón y Cajal Ctra. de Colmenar, km. 9,100, 28034 Madrid.
Fernández Lucas
M
M
Arambarri
M
M
Merino
J L
JL
Echarri
R
R
Alarcón
C
C
Marcén
R
R
Rivera
M
M
Ortuño
J
J
D005069:Evaluation Studies as Topic; D015312:Hemodialysis Solutions / Q000737:chemistry* / Q000378:metabolism; D006801:Humans; D007477:Ions; D007676:Kidney Failure, Chronic / Q000628:therapy; D008991:Monitoring, Physiologic / Q000379:methods*; D006435:Renal Dialysis / Q000379:methods*; D014508:Urea / Q000378:metabolism*
D015312:Hemodialysis Solutions; D007477:Ions; D014508:Urea