Self-reported ratings appear to be the best for workload measurement

Webster, Craig; Weller, Jennifer

doi:10.1136/bmjstel-2018-000330

“…Also, after each scenario, participants completed the National Aeronautics and Space Administration (NASA) Task Load Index (TLX) questionnaire, a tool to measure perceived workload. It was originally developed for use in the aerospace industry, but has since been extensively used and validated also in human factors and healthcare research [29][30][31][32][33][34][35][36][37]. We found validation for the use of NASA TLX to measure subjective workload during patient monitoring tasks in previous studies.…”

Section: Study Proceduresmentioning

confidence: 99%

Avatar-based versus conventional vital sign display in a central monitor for monitoring multiple patients: a multicenter computer-based laboratory study

Garot

¹

,

Rössler

²

,

Pfarr

³

et al. 2020

BMC Med Inform Decis Mak

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Background: Maintaining adequate situation awareness is crucial for patient safety. Previous studies found that the use of avatar-based monitoring (Visual Patient Technology) improved the perception of vital signs compared to conventional monitoring showing numerical and waveform data; and was further associated with a reduction of perceived workload. In this study, we aimed to evaluate the effectiveness of Visual Patient Technology on perceptive performance and perceived workload when monitoring multiple patients at the same time, such as in central station monitors in intensive care units or operating rooms. Methods: A prospective, within-subject, computer-based laboratory study was performed in two tertiary care hospitals in Switzerland in 2018. Thirty-eight physician and nurse anesthetists volunteered for the study. The participants were shown four different central monitor scenarios in sequence, where each scenario displayed two critical and four healthy patients simultaneously for 10 or 30 s. After each scenario, participants had to recall the vital signs of the critical patients. Perceived workload was assessed with the National Aeronautics and Space Administration Task-Load-Index (NASA TLX) questionnaire. Results: In the 10-s scenarios, the median number of remembered vital signs significantly improved from 7 to 11 using avatar-based versus conventional monitoring with a mean of differences of 4 vital signs, 95% confidence interval (CI) 2 to 6, p < 0.001. At the same time, the median NASA TLX scores were significantly lower for avatarbased monitoring (67 vs. 77) with a mean of differences of 6 points, 95% CI 0.5 to 11, p = 0.034. In the 30-s scenarios, vital sign perception and workload did not differ significantly. Conclusions: In central monitor multiple patient monitoring, we found a significant improvement of vital sign perception and reduction of perceived workload using Visual Patient Technology, compared to conventional monitoring. The technology enabled improved assessment of patient status and may, thereby, help to increase situation awareness and enhance patient safety.

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“…co-workers, noise, visitors or phone-calls. 5 Increased workload is associated with stress, perception errors and consequently impaired decision-making, all jeopardizing patient safety [26]. In this context, researchers identified inattentional blindness as a common form of perception error [10,11,27].…”

Section: Discussionmentioning

confidence: 99%

Avatar-based versus conventional vital signs display in a central monitor for monitoring multiple patients: A multicenter computer-based laboratory study

Garot

¹

,

Rössler²,

Pfarr

³

et al. 2019

Preprint

0

View full text Add to dashboard Cite

Background Maintaining adequate situation awareness is crucial for patient safety. Previous studies found that the use of avatar-based monitoring (Visual Patient Technology) improved the perception of vital signs compared to conventional monitoring showing numerical and waveform data; and was further associated with a reduction of perceived workload. In this study, we aimed to evaluate the effectiveness of Visual Patient Technology on perceptive performance and perceived workload when monitoring multiple patients at the same time, such as in central station monitors in intensive care units or operating rooms.Methods A prospective, within-subject, computer-based laboratory study was performed in two tertiary care hospitals in Switzerland in 2018. Thirty-eight physician and nurse anesthetists volunteered for the study. The participants were shown four different central monitor scenarios in sequence, where each scenario displayed two critical and four healthy patients simultaneously for 10 or 30 seconds. After each scenario, participants had to recall the vital signs of the critical patients. Perceived workload was assessed with the National Aeronautics and Space Association Task-Load-Index (NASA TLX) questionnaire.Results In the 10-second scenarios, the median number of perceived vital signs significantly improved from 7 to 11 using avatar-based versus conventional monitoring with a median of differences of 5 vital signs, p < 0.001. At the same time, the median NASA TLX scores were significantly lower for avatar-based monitoring (67 vs. 77) with a median of differences of 5 points, p = 0.024. In the 30-second scenarios, vital sign perception and workload did not differ significantly.Conclusions In central monitor multiple patient monitoring, we found a significant improvement of vital sign perception and reduction of perceived cognitive workload using Visual Patient Technology, compared to conventional monitoring. The technology enabled improved assessment of patient status and may, thereby, increase situation awareness and enhance patient safety.

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“…co-workers, noise, visitors or phone calls. [5] Increased workload is associated with stress, perception errors and consequently impaired decision-making, all jeopardizing patient safety [40]. In this context, researchers identified inattentional blindness as a common form of perception error [10,11,41].…”

Section: Discussionmentioning

confidence: 99%

“…Task Load Index (TLX) questionnaire, an established measure of perceived workload developed initially for use in the aerospace industry, but since validated also for use in human factors and healthcare research. [29][30][31][32][33][34][35][36]. We showed participants 10-and 30-second scenarios to investigate effects of different viewing times.…”

Section: Study Proceduresmentioning

confidence: 99%

Avatar-based versus conventional vital signs display in a central monitor for monitoring multiple patients: A multicenter computer-based laboratory study.

Garot

¹

,

Rössler²,

Pfarr

³

et al. 2019

Preprint

0

View full text Add to dashboard Cite

Background Maintaining adequate situation awareness is crucial for patient safety. Previous studies found that the use of avatar-based monitoring (Visual Patient Technology) improved the perception of vital signs compared to conventional monitoring showing numerical and waveform data; and was further associated with a reduction of perceived workload. In this study, we aimed to evaluate the effectiveness of Visual Patient Technology on perceptive performance and perceived workload when monitoring multiple patients at the same time, such as in central station monitors in intensive care units or operating rooms.Methods A prospective, within-subject, computer-based laboratory study was performed in two tertiary care hospitals in Switzerland in 2018. Thirty-eight physician and nurse anesthetists volunteered for the study. The participants were shown four different central monitor scenarios in sequence, where each scenario displayed two critical and four healthy patients simultaneously for 10 or 30 seconds. After each scenario, participants had to recall the vital signs of the critical patients. Perceived workload was assessed with the National Aeronautics and Space Association Task-Load-Index (NASA TLX) questionnaire.Results In the 10-second scenarios, the median number of perceived vital signs significantly improved from 7 to 11 using avatar-based versus conventional monitoring with a median of differences of 5 vital signs, p < 0.001. At the same time, the median NASA TLX scores were significantly lower for avatar-based monitoring (67 vs. 77) with a median of differences of 5 points, p = 0.024. In the 30-second scenarios, vital sign perception and workload did not differ significantly.Conclusions In central monitor multiple patient monitoring, we found a significant improvement of vital sign perception and reduction of perceived cognitive workload using Visual Patient Technology, compared to conventional monitoring. The technology enabled improved assessment of patient status and may, thereby, increase situation awareness and enhance patient safety.

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Self-reported ratings appear to be the best for workload measurement

Cited by 9 publications

References 14 publications

Avatar-based versus conventional vital sign display in a central monitor for monitoring multiple patients: a multicenter computer-based laboratory study

Avatar-based versus conventional vital sign display in a central monitor for monitoring multiple patients: a multicenter computer-based laboratory study

Avatar-based versus conventional vital signs display in a central monitor for monitoring multiple patients: A multicenter computer-based laboratory study

Avatar-based versus conventional vital signs display in a central monitor for monitoring multiple patients: A multicenter computer-based laboratory study.

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