Effect of differing blood lines on delivered blood flow during hemodialysis.

Unlabelled: BACKGROUND The influence of differing blood tubing sets on delivered dialyzer blood flow (Q B ) was studied using ReadySet (RS; Medisystem Inc, Seattle, WA) and CombiSet (CS; Fresenius, Walnut Creek, CA).

Methods: In vitro, we measured Q B and pre-pump arterial pressures (P A; in millimeters of mercury) during 4 hours at a prescribed blood pump flow (Q P ) of 450 mL/min, using a glycerin-water mixture for RS and CS blood tubing sets (n = 10 each). We then performed 3 clinical studies to determine the difference between Q P and Q B as a function of P A for both tubing types and any effects of tubing type on delivered Kt/V in patients.