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The effectiveness and efficiency of a new infusion pump interface: results from a longitudinal comparative study

Beek, F. van (2013) The effectiveness and efficiency of a new infusion pump interface: results from a longitudinal comparative study.

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Abstract:In hospital settings it is very common that patients receive certain fluids, medication or nutrients through an infusion pump. A downside to the use of infusion pumps is that wrongly performed actions often have negative consequences for the well-being of the patient: in the United States for example, from 2005 until 2009, 56.000 reports of adverse events with infusion pumps have been collected that influenced the well-being of the patient in a negative way (FDA, 2011). Causes for problems are poor legibility, not giving feedback regarding actions of the user, an overload of information or the complexity of menu structures (Schraagen & Verhoeven, 2013). In the current study a new interface for an infusion pump was tested through simulated use testing. The interface was developed and designed with respect to human factors engineering (HFE) principles. We tested the new interface by comparing it with the commercially available Braun Perfusor Space pump in a longitudinal usability test. In this test, critical tasks and routine tasks were designed and error rates, task completion times and the mental effort were taken as measures for analysis. The primary aim of the study was to validate the newly designed interface and study if this interface was designed better and would therefore be safer than an infusion pump interface that was not designed with respect to HFE principles. Two user groups were included in the experiment: employees of the nursing department and employees of the intensive care. In total, 25 persons participated in the usability test. The results show that the current state-of-the-art in HFE on devices does have a positive impact on device use: differences between the two interfaces were found. In general, less time was needed to complete actions and tasks were completed with a lower mental effort with the new interface compared to the other interface. Contrary to expectations, in general no differences in the number of errors were found between the interfaces. Looking more specifically at the results shows that all functions, except for turning on the pump and searching information, are performed quicker with the new interface which is therefore more efficiently. Tasks that are error prone and therefore can be labelled as critical, are the tasks of giving an automatic or manual bolus, starting an infusion and searching for information. Both user groups showed overall similar behaviour, the only difference being that the nursing department employees needed less time to perform actions with the interfaces of the infusion pumps compared to the intensive care employees.
Item Type:Essay (Master)
Faculty:BMS: Behavioural, Management and Social Sciences
Subject:77 psychology
Programme:Psychology MSc (66604)
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