Davita Adequacy of dialysis
Kt/V what is K? - ANS-Clearance of urea
\Kt/V what is t? - ANS-Time of dialysis session
\Kt/V what is V? - ANS-Volume of pts body water in which urea is distributed
\Lab draw mistakes that falsely increase Kt/V - ANS-Drawing without lowering BFR, not
waiting full 15 sec after lowering BFR, drawing from venous line
\Lab draw mistakes that would falsely decrease Kt/V - ANS-Accidentally diluting pre
treatment arterial BUN blood sample with saline, waiting longer than 15 sec
\Needle gauge and suggested BFR - ANS-17g 200-250ml/min, 16g 250-350, 15g 350-450,
14g greater than 450
\Procedure for post BUN lab draw - ANS-Turn off or decrease UF to 50ml/hr, decrease DFR
to 300 or place machine in bypass, reduce BFR to 100, wait 15 sec and obtain from arterial
line
\What factors influence t? - ANS-Longer blood/dialysate contact time, more frequent or extra
treatments
\What factors influence V? - ANS-Sex, body weight, height, age, amputations
\What treatment factors decrease K? - ANS-Dialyzer smaller, inadequate anticoagulation,
low bfr, low uf goal, low dfr, bvp
\
Kt/V what is K? - ANS-Clearance of urea
\Kt/V what is t? - ANS-Time of dialysis session
\Kt/V what is V? - ANS-Volume of pts body water in which urea is distributed
\Lab draw mistakes that falsely increase Kt/V - ANS-Drawing without lowering BFR, not
waiting full 15 sec after lowering BFR, drawing from venous line
\Lab draw mistakes that would falsely decrease Kt/V - ANS-Accidentally diluting pre
treatment arterial BUN blood sample with saline, waiting longer than 15 sec
\Needle gauge and suggested BFR - ANS-17g 200-250ml/min, 16g 250-350, 15g 350-450,
14g greater than 450
\Procedure for post BUN lab draw - ANS-Turn off or decrease UF to 50ml/hr, decrease DFR
to 300 or place machine in bypass, reduce BFR to 100, wait 15 sec and obtain from arterial
line
\What factors influence t? - ANS-Longer blood/dialysate contact time, more frequent or extra
treatments
\What factors influence V? - ANS-Sex, body weight, height, age, amputations
\What treatment factors decrease K? - ANS-Dialyzer smaller, inadequate anticoagulation,
low bfr, low uf goal, low dfr, bvp
\
