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Abstract
We sought to retrospectively review the dosing patterns of continuous renal replacement therapy (CRRT) in patients with acute renal failure (ARF) and determine their actual delivered dosage of CRRT. Computerized records of patients (n = 115) who received CRRT for ARF at a single, large, academic, tertiary care hospital from September 1, 1999 through August 31, 2000 were reviewed. The delivered dose of CRRT for each patient/day was calculated from the hourly effluent flow rate, the patient's weight, and the duration (in hours) of CRRT for that day. A mean effluent flow rate (in L/h) for each patient was then calculated. The average number of hours/day on CRRT was 16.1 +/- 3.53 (mean +/- SD), with a mean flow rate (averaged over 24 h) of 1.36 +/- 0.31 L/h. The mean CRRT dose prescribed for these patients was 24.46 +/- 6.73 mL/Kg/h, but the mean dose delivered was only 16.55 +/- 5.41 mL/Kg/h (68% of the prescribed dose, P <.000001). Many patients are prescribed low doses of CRRT. Furthermore, the dose delivered is considerably lower than that prescribed. Methods and procedures to extend CRRT system life may improve the dose delivery.
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