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Task analysis of writing hospital admission orders: evidence of a problem-based approach
Christopher D Johnson1, Roni F Zeiger, Amar K Das
1Stanford Biomedical Informatics, Stanford University, Stanford, CA, USA.
Abstract:
As part of a broader project to improve the usability of computerized physician order entry (CPOE)systems, we set out to study the cognitive tasks physicians undertake to write "admission orders" when admitting a patient to the hospital. In particular, we evaluate the hypothesis that physicians' mental model of diagnostic and therapeutic planning is problem based, whereas both paper-based ordering and CPOE are typically organized around functional categories of orders such as those reflected in the mnemonic ADCVAANDIML. A task analysis was performed which included think-aloud observations of physicians writing orders in clinical care settings and for fictional case-scenarios, as well as a semistructured questionnaire. Our work finds core tasks of admitting a patient to hospital and conflicts between physicians' mental model and traditional ordering systems. Based on our study, we suggest improvements to traditional CPOE systems.
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