Table 2.

Prescribed and observed treatment characteristics of 56 patients during CRRT

PrescribedbObservedc
Mean number of treatments per patient7.5 ± 7
Median treatment days5 (3 to 12)
Treatment time (minutes)14401413 (1260 to 1440)
Blood flow rate (Qb; ml/min)100 (100 to 100)100 (100 to 100)
Dialysis flow rate (Qd; ml/h)1000 (1000 to 1000)1000 (958 to 1000)
Replacement fluid rate (Qr; ml/h)a500 (500 to 500)441 (342 to 500)
Net fluid removal rate (Qnet; ml/h)1000 (1000 to 1000)809 (677 to 1000)
Total effluent (ml/h)2500 (2412.5 to 2500)2280 (2035 to 2500)
  • Data derived from 56 patients with 420 treatment periods (24-hour duration) of CRRT. Values of all flow rates are expressed as median (IQR).

  • a Predilution.

  • b Reflects the amounts ordered. In some patients the prescription varied with respect to the amount of net fluid removal (range 700 to 1200) and dialysate flow rate (range 900 to 2100 ml/h) for some portion of their therapy time.

  • c Rates reflect the values recorded for the period and represent the cumulative effects of time on therapy secondary to alarms, bag and filter changes, and other transient therapy interruptions.