1. Volume 56, Issue 3, Pages 1129-1135 (September 1999)
Ultrafiltration method for measuring vascular access flow rates during hemodialysis 
Deniz Yarar, Alfred K. Cheung, Paul Sakiewicz, Robert M. Lindsay, Emil P. Paganini, Robert R. Steuer, John K. Leypoldt 
Kidney International 
Volume 56, Issue 3, Pages (September 1999)
DOI: /S (15)
Copyright © 1999 International Society of Nephrology Terms and Conditions

2. Figure 1
Schematic diagram of a dialysis circuit with the dialysis blood lines reversed from their normal configuration. The monitor for determining arterial hematocrit (Ho) is placed between the arterial line and the dialyzer. Abbreviations are: QA, vascular access blood flow rate; HA, hematocrit in the access flow; Qb, dialyzer arterial blood flow rate; Qv, dialyzer venous blood flow rate; Hv, hematocrit in the venous flow; Qf, ultrafiltration rate.
Kidney International  , DOI: ( /S (15) )
Copyright © 1999 International Society of Nephrology Terms and Conditions

3. Figure 2
Schematic diagram describing the expected changes in hematocrit after abruptly changing the ultrafiltration rate. The solid line indicates continuous hematocrit readings, and the dashed line indicates the ultrafiltration rate. The hematocrit was recorded every four minutes, that is, at 4, 8, and 12 minutes. This protocol was followed with the dialysis lines in both the normal and reverse configurations.
Kidney International  , DOI: ( /S (15) )
Copyright © 1999 International Society of Nephrology Terms and Conditions

4. Figure 3
Relationship between vascular access blood flow rates determined by the ultrafiltration (UF) method compared with those determined by saline dilution using an ultrasound flow sensor. The solid line is the identity line. The best fit regression line (not shown) was Y = 0.96 (± 0.05) X (± 50); R = 0.92; N = 65.
Kidney International  , DOI: ( /S (15) )
Copyright © 1999 International Society of Nephrology Terms and Conditions