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Title:
Advanced auditory displays and head mounted displays: Advantages and disadvantages for monitoring by the distracted anesthesiologist.
Authors:
Sanderson, P. M., Watson, M. O., Russell, W. J., Jenkins, S., Liu, D., Green, N., Llewelyn, K., Cole, P., Shek, V., Krupenia, S.
Journal:
Anesthesia and Analgesia, 106(6), 1787-1797.

BACKGROUND:

In a full-scale anesthesia simulator study we examined the relative effectiveness of advanced auditory displays for respiratory and blood pressure monitoring and of head-mounted displays (HMDs) as supplements to standard intraoperative monitoring.

METHODS:

Participants were 16 residents and attendings. While performing a reading-based distractor task, participants supervised the activities of a resident (an actor) who they were told was junior to them. If participants detected an event that could eventually harm the simulated patient, they told the resident, pressed a button on the computer screen, and/or informed a nearby experimenter. Participants completed four 22-min anesthesia scenarios. Displays were presented in a counterbalanced order that varied across participants and included: (1) Visual (visual monitor with variable-tone pulse oximetry), (2) HMD (Visual plus HMD), (3) Audio (Visual plus auditory displays for respiratory rate, tidal volume, end-tidal CO2, and noninvasive arterial blood pressure), and (4) Both (Visual plus HMD plus Audio).

RESULTS:

Participants detected significantly more events with Audio (mean = 90%,median = 100%, P < 0.02) and Both (mean = 92%, median = 100%, P < 0.05) but not with HMD (mean = 75%, median = 67%, ns) compared with the Visual condition (mean = 52%, median = 50%). For events detected, there was no difference in detection times across display conditions. Participants self-rated monitoring as easier in the HMD, Audio and Both conditions and their responding as faster in the HMD and Both conditions than in the Visual condition.

CONCLUSIONS:

Advanced auditory displays help the distracted anaesthesiologist maintain peripheral awareness of a simulated patient's status, whereas a HMD does not significantly improve performance. Further studies should test these findings in other intraoperative contexts.

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Accessed: 4244 times
Created: Tuesday, 14th April 2009 by paulj
Modified: Monday, 7th March 2011 by paulj
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