Evaluating process changes in a pediatric hospital medication system. 
This article describes a process change designed to increase the safety of prescribing and interpreting complex order sets.  All chemotherapy orders written for pediatric oncology patients at a major teaching hospital in the Eastern United States and the affiliated ambulatory clinic from June 1998 through February 2000 (n = 1792) were reviewed to evaluate a new process for communication of chemotherapy orders.  The multidisciplinary check (MDC) is a forum where all disciplines simultaneously review and change complex order sets.  Evaluation of the MDC included monthly completion rate and classification of changes made to orders at MDC.  Over the study period, 96% of eligible orders received a multidisciplinary check, and 44% were changed.  The most common change was to clarify discrepancies between the order and the protocol.  Changes were made to avoid medication errors in 99 of 451 orders.  Changes to avoid medication errors were more likely to involve nonchemotherapy medications.  The MDC is an efficient and feasible process to increase safety at the beginning of the medication system.