DaVita

Diffusion - Correct answer-movement of dissolved PARTICLES across a semipermeable membrane from the side of HIGHER concentration TO side of LOWER concentration (across concentration gradient). at equilibrium, no net transport takes place & dialysis fluid needs to be exchanged. ultrafiltration - Correct answer-removes water from the blood by PUSHING it across the semipermeable membrane from the blood side within the dialyzer's hollow fibers to the dialysate side; pressure is added to the dialyzer to get the fluid out. TMP - Correct answer-transmembrane pressure; pressure in dialyzer. (+ TMP can show a clot). osmosis - Correct answer-movement of WATER across a semipermeable membrane from the side of LOWER solute concentration to the side with the HIGHER solute concentration, until equilibrium is reached. osmotic pressure gradients drive ultrafiltration. when drawing the post-BUN sample at the completion of the treatment... - Correct answer-1) turn off the UFR 2) decrease the dialysate flow rate to 300 ml/min or place the machine in bypass 3) reduce BFR to 50 ml/min 4) then wait 15 seconds 5) draw the BUN blood sample from arterial sample port (venous port can give falsely low readings)